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葡萄细胞分裂素响应调节因子VvRR2互作蛋白筛选与鉴定 被引量:3
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作者 余义和 李秀珍 +3 位作者 郭大龙 杨英军 李学强 张国海 《中国农业科学》 CAS CSCD 北大核心 2016年第6期1097-1105,共9页
【目的】从葡萄中克隆细胞分裂素响应调节因子VvRR2,获得VvRR2的互作蛋白,为阐明VvRR2在欧洲葡萄抗病反应中的作用机制提供依据。【方法】对葡萄接种白粉病菌,提取总RNA后反转录,利用实时荧光定量PCR检测VvRR2转录本对白粉病菌的响应;... 【目的】从葡萄中克隆细胞分裂素响应调节因子VvRR2,获得VvRR2的互作蛋白,为阐明VvRR2在欧洲葡萄抗病反应中的作用机制提供依据。【方法】对葡萄接种白粉病菌,提取总RNA后反转录,利用实时荧光定量PCR检测VvRR2转录本对白粉病菌的响应;构建瞬时表达载体p BI221-VvRR2-GFP,转化拟南芥原生质体进行亚细胞定位分析;构建酵母表达载体p GBKT7-VvRR2,转化酵母菌株AH109,检测VvRR2的转录激活活性;构建酵母表达c DNA文库,以VvRR2为诱饵,通过Mating法筛选互作蛋白,对获得候选序列进行Blast分析;将候选蛋白VvTGA的全长序列克隆至p GADT7载体形成重组载体p GADT7-VvTGA,与重组诱饵载体p GBKT7-VvRR2共转化酵母,进行双杂交验证VvRR2与VvTGA的相互作用;将VvTGA的全长序列克隆至p SPYNE(R)173载体,形成重组载体p SPYNE-VvTGA,将VvRR2的全长序列克隆至p SPYCE(M)载体,形成重组载体p SPYCE-VvRR2,然后将两个重组载体共转化拟南芥原生质体,利用双分子荧光互补技术验证VvRR2与VvTGA的相互作用。【结果】葡萄接种白粉病菌后,细胞分裂素响应调节因子VvRR2呈现受白粉病菌诱导表达模式。VvRR2定位在拟南芥原生质体的细胞核,转录激活试验结果表明VvRR2在酵母体内具有转录激活活性。在含有60 mmol·L-1的3-AT培养基上可以抑制VvRR2诱饵载体的自激活活性,VvRR2诱饵载体对宿主酵母菌没有毒性。以VvRR2为诱饵,初步筛选到287个单克隆,在高严谨条件下进一步筛选获得23个有效序列,Blast分析显示这些基因参与蛋白质合成与降解、细胞分裂素信号传导、光反应和生物钟节律、生长发育和逆境响应。酵母回复双杂交试验结果显示含有空载体(p GADT7或p GBKT7)酵母在四缺培养基(含3-AT)上不能生长,含有两种重组质粒的酵母在四缺培养基(含3-AT)上能够生长,并在含有X-α-Gal的四缺培养基上能够显色。双分子荧光互补试验结果显示共转化p SPYCE-VvRR2与p SPYNE(R)173、p SPYNE-VvTGA与p SPYCE(M)的原生质体没有黄色荧光,而共转化p SPYCE-VvRR2与p SPYNE-VvTGA的原生质体显示黄色荧光。VvTGA的表达类似于VvRR2,呈现受白粉病菌诱导表达模式。【结论】葡萄细胞分裂素响应调节因子VvRR2是一个受白粉病菌诱导表达的转录因子,能够与VvTGA相互作用,并且VvTGA受白粉病菌诱导表达。 展开更多
关键词 葡萄 细胞分裂素响应调节因子 Vvrr2 VvTGA 互作蛋白
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欧盟尚未作出最终监管批准 美国粮食贸易商拒收孟山都新转基因大豆RR2X 被引量:1
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《农药》 CAS CSCD 北大核心 2016年第5期355-355,共1页
一个由美国嘉吉、阿彻丹尼尔斯米德兰、邦基和其他粮食公司组成的贸易团体最近抨击了孟山都,指责其在确保获得欧盟监管批准之前就开始销售转基因大豆种子Roundup Ready 2 Xtend。这些美国粮食公司计划拒绝收购孟山都最新的转基因大豆,... 一个由美国嘉吉、阿彻丹尼尔斯米德兰、邦基和其他粮食公司组成的贸易团体最近抨击了孟山都,指责其在确保获得欧盟监管批准之前就开始销售转基因大豆种子Roundup Ready 2 Xtend。这些美国粮食公司计划拒绝收购孟山都最新的转基因大豆,他们担心这些大豆品种没有获得欧盟的监管批准,可能扰乱国际贸易。目前,他们正在向孟山都施压, 展开更多
关键词 孟山都 转基因大豆 rr2X 粮食贸易 大豆种子 公司计划 米德兰 丹尼尔斯 邦基 先正达公司
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美国2016种植季麦草畏将禁止用于RR2X转基因大豆
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《当代化工》 CAS 2016年第5期973-973,共1页
尽管Roundup Ready 2 Xtend^TM(RR2X)转基因大豆能够抗草甘膦和麦草畏,但是美国环保署(EPA)近日表示2016种植季麦草畏将禁止用于RR2X转基因大豆。
关键词 转基因大豆 rr2X 抗草甘膦 制剂产品 季任 大豆种植 美国环保署 孟山都 违反法律
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RR1 and RR2 gene deletion affects the immunogenicity of a live attenuated pseudorabies virus vaccine candidate in natural pig host
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作者 Shijun YAN He YAN +7 位作者 Chaolin ZHANG Tongyan WANG Qingyuan YANG Zhe SUN Yan XIAO Feifei TAN Xiangdong LI Kegong TIAN 《Frontiers of Agricultural Science and Engineering》 2016年第1期81-86,共6页
As virulence-determining genes, RR1 and RR2 encode the small subunit and large subunit of viral ribonucleotide reductase(RR) in pseudorabies virus which have been extensively studied in mice. However,their role in pig... As virulence-determining genes, RR1 and RR2 encode the small subunit and large subunit of viral ribonucleotide reductase(RR) in pseudorabies virus which have been extensively studied in mice. However,their role in pigs has not been adequately investigated. In this study, we deleted RR1 and RR2 genes based on a TK/g E/g I triple gene-deleted pseudorabies virus and tested its efficacy in pigs as a vaccine candidate. The rescued virus showed similar growth properties and plaque size in vitro as its parent strain. In an animal study, the virus could elicit humoral immune responses shown by generation of g B-specific antibodies and virus neutralizing antibodies.However, vaccination could not provide protection against virulent pseudorabies virus challenge since vaccinated pigs showed clinical pseudorabies-specific syndromes. The deficiency in protection may due to the generation of late and low levels of gB antibodies and virus neutralizing antibodies. 展开更多
关键词 pseudorabies virus RR1 and rr2 ribonucleotide reductase vaccine candidate
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基于串联系统的条件间隔的随机性质
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作者 张正成 陈娅萍 《应用概率统计》 北大核心 2025年第4期545-554,共10页
在本文中,我们考虑了串联系统在某时刻未失效时,存活元件构成的条件间隔的随机性质.首先,我们得到了当元件寿命分布是任意连续性随机变量时,条件间隔的边际生存函数,基于此建立了条件间隔的随机比较,并且得到标准条件间隔的联合密度函数... 在本文中,我们考虑了串联系统在某时刻未失效时,存活元件构成的条件间隔的随机性质.首先,我们得到了当元件寿命分布是任意连续性随机变量时,条件间隔的边际生存函数,基于此建立了条件间隔的随机比较,并且得到标准条件间隔的联合密度函数是ISO∗的一个充分条件;其次,我们得到条件间隔是MTP_(2)的以及其联合密度函数是成对RR2的;最后,我们考虑了当元件寿命是独立指数分布时条件间隔的生存函数及其随机性质,以及它们的一些统计性质. 展开更多
关键词 串联系统 条件间隔 随机序 联合分布 指数分布 ISO^(*) MTP_(2) rr2
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CO_(2)电催化制乙烯的铜基催化剂
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作者 胡亚清 徐昆誉 +3 位作者 杨皓凌 张风帆 杨子浩 董朝霞 《化学进展》 北大核心 2025年第3期332-350,共19页
鉴于环境问题和能源转型,使用可再生电力将二氧化碳还原(ECO_(2)RR)转化为乙烯(C_(2)H_(4)),为碳中和提供了一种绿色可持续的解决方案,同时也具有额外的经济效益。近年来,在电催化CO_(2)还原制备乙烯方面取得很大进展,但仍存在选择性、... 鉴于环境问题和能源转型,使用可再生电力将二氧化碳还原(ECO_(2)RR)转化为乙烯(C_(2)H_(4)),为碳中和提供了一种绿色可持续的解决方案,同时也具有额外的经济效益。近年来,在电催化CO_(2)还原制备乙烯方面取得很大进展,但仍存在选择性、活性和稳定性低等问题亟待解决。对此,本文综述了近年来铜基催化剂电化学还原CO_(2)制备乙烯的研究进展。首先,简述了ECO_(2)RR的机理。然后,重点介绍了ECO_(2)RR制乙烯的代表性催化剂设计策略,如串联催化、晶面调控、表面改性、价态影响、尺寸大小、缺陷工程和形貌设计等。最后在此基础上,讨论了未来电催化CO_(2)还原合成乙烯的挑战和前景。 展开更多
关键词 ECO_(2)RR 乙烯 反应机理 催化剂 设计策略
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基于机器学习高通量筛选二氧化碳还原电催化剂的研究进展 被引量:2
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作者 李歌 马子然 +2 位作者 闾菲 彭胜攀 佟振伟 《材料导报》 北大核心 2025年第1期156-168,共13页
随着全球能源需求不断增长,化石燃料资源有限和二氧化碳排放对气候变化的影响愈加严重,减少二氧化碳排放已迫在眉睫。基于绿电的电化学还原二氧化碳(CO_(2)RR)方法是缓解化石燃料消耗和温室气体排放的理想途径。传统催化剂的研发模式主... 随着全球能源需求不断增长,化石燃料资源有限和二氧化碳排放对气候变化的影响愈加严重,减少二氧化碳排放已迫在眉睫。基于绿电的电化学还原二氧化碳(CO_(2)RR)方法是缓解化石燃料消耗和温室气体排放的理想途径。传统催化剂的研发模式主要依赖实验试错方法,难以满足对高效催化剂的研发需求。快速发展的机器学习等数据科学技术为催化剂研发带来范式变革的契机。高通量计算结合机器学习已经成为近年来电催化剂配方设计中的重要手段之一。基于此,本文概述了近年来高通量计算结合机器学习指导催化剂开发的研究成果,包括催化剂设计的原理、模拟计算的策略以及机器学习模型的构建。通过将高通量计算和机器学习结合,可以加速催化剂设计过程,为CO_(2)RR催化剂的高效筛选和开发提供了新方法,拓宽人工智能在催化剂筛选设计中的应用。 展开更多
关键词 CO_(2)RR 密度泛函理论计算 机器学习 描述符 催化剂筛选
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活性染料高温厌氧生物降解研究 被引量:12
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作者 高欢 蒋进元 +1 位作者 胡翔 周岳溪 《环境科学研究》 EI CAS CSCD 北大核心 2007年第4期102-105,共4页
研究了升流式厌氧污泥床反应器(UASB)在高温条件下处理含盐活性红2(RR2)染料废水的工艺及RR2的降解机理.结果表明:运行温度为(55±1)℃,水力停留时间为12 h,进水ρ(NaCl),ρ(CODCr)和ρ(RR2)分别为50 000,1 000和100 mg/L的条件下,... 研究了升流式厌氧污泥床反应器(UASB)在高温条件下处理含盐活性红2(RR2)染料废水的工艺及RR2的降解机理.结果表明:运行温度为(55±1)℃,水力停留时间为12 h,进水ρ(NaCl),ρ(CODCr)和ρ(RR2)分别为50 000,1 000和100 mg/L的条件下,以驯化好的厌氧颗粒污泥为接种污泥,运行10 d后反应器达到稳定,CODCr和RR2去除率分别为25%和90%以上.利用气相色谱-质谱联用(GC-MS)分析厌氧出水发现,RR2的生物降解途径为在厌氧条件下最先被还原的是较易断裂的偶氮键(N N),去除颜色后形成了芳香胺类化合物,一部分芳香胺类化合物通过水解和氧化作用进一步降解为更小分子的代谢物. 展开更多
关键词 含盐染料废水 高温 厌氧 UASB反应器 活性红2(rr2)
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核黄素对偶氮染料生物降解的影响 被引量:8
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作者 赵婧 蒋进元 +2 位作者 丁林 周岳溪 梁杰 《环境科学研究》 EI CAS CSCD 北大核心 2009年第10期1193-1197,共5页
采用高温〔(55±1)℃〕升流式厌氧污泥床(UASB)-常温三相好氧流化床组合工艺处理含盐偶氮染料活性艳红X-3B(RR2)废水,考察核黄素(VB2)对染料的降解及活性污泥微生物相的影响.结果表明:在水力停留时间(HRT)为18 h,进水ρ... 采用高温〔(55±1)℃〕升流式厌氧污泥床(UASB)-常温三相好氧流化床组合工艺处理含盐偶氮染料活性艳红X-3B(RR2)废水,考察核黄素(VB2)对染料的降解及活性污泥微生物相的影响.结果表明:在水力停留时间(HRT)为18 h,进水ρ(RR2)为40-100 mg/L,ρ(CODCr)为800-1 200 mg/L,ρ(NaCl)为30 000-35 000 mg/L,UASB反应器的有机负荷为2-3kg/(m3.d),三相好氧流化床有机负荷为0.3-0.4 kg/(kg.d)的条件下,ρ(VB2)为5 mg/L时可以明显改善工艺的运行效果,RR2和CODCr的去除率均在95%以上;UASB及三相好氧流化床中活性污泥微生物以杆菌为主,核黄素的投加使得系统中菌体体积变小、总量减少. 展开更多
关键词 核黄素 UASB 三相好氧流化床 rr2
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Construction of efficient electrodes for CO_(2)RR through microenvironment regulation of hydrophobic ionomer 被引量:1
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作者 Qingfeng Chang Gong Zhang +7 位作者 Jinxing Chen Xiaowei Du Chujun Wang Yuan Cai Yuzhe Du Peng Zhang Tuo Wang Jinlong Gong 《Journal of Energy Chemistry》 2025年第9期373-380,I0011,共9页
CO_(2)reduction reaction(CO_(2)RR)electrolyzers based on gas diffusion electrode(GDE)enable the direct mass transfer of CO_(2)to the catalyst surface for participation in the reaction,thereby establishing an efficient... CO_(2)reduction reaction(CO_(2)RR)electrolyzers based on gas diffusion electrode(GDE)enable the direct mass transfer of CO_(2)to the catalyst surface for participation in the reaction,thereby establishing an efficient three-phase reaction interface that significantly enhances current density.However,current hydrophobic modification methods face difficulties in achieving precise and substantial control over wettability,and the hydrophobic modifiers tend to significantly impair the conductivity of the electrode and ion transport capabilities.This study employs Nafion ionomers to hydrophobically modify the threedimensional catalyst layer,revealing the bifunctionality of Nafion.The fluorinated backbone of Nafion ensures the hydrophobicity of the entire catalyst layer,while its sulfonic acid groups promote ion transport,without significantly affecting the conductivity of the electrode.Furthermore,by employing modifiers with distinct wettability characteristics,a highly efficient and large-scale manipulation of the hydrophilic/hydrophobic properties of the catalyst layer was successfully realized.The electrode,constructed with silver nanopowder as a representative catalyst and modified with the hydrophobic ionomer Nafion,exhibits a substantial enhancement in both catalytic activity and durability.The optimized electrode exhibited exceptional electrocatalytic performance in both flow cell and membrane electrode assembly(MEA)configurations.Notably,in the MEA,the electrode achieved a remarkable CO Faradaic efficiency(FE)of 93.3%at a total current density of 200 mA cm^(-2),while maintaining stable operation for over 62 h. 展开更多
关键词 GDE CO_(2)RR WETTABILITY Hydrophobic ionomer
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离子液体电解液促进电催化CO_(2)性能研究
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作者 付志翔 刘柏江 +1 位作者 门子俊 郭天祥 《山西化工》 2025年第7期8-12,19,共6页
铜基催化剂因其独特的*CO中间体耦合能力,成为CO_(2)RR领域的研究焦点。然而,传统铜基催化剂在水性电解液中面临选择性低、稳定性差等问题。本研究通过调控1-丁基-3-甲基咪唑四氟硼酸盐与水的混合比例,探究其对铜基催化剂电催化CO_(2)... 铜基催化剂因其独特的*CO中间体耦合能力,成为CO_(2)RR领域的研究焦点。然而,传统铜基催化剂在水性电解液中面临选择性低、稳定性差等问题。本研究通过调控1-丁基-3-甲基咪唑四氟硼酸盐与水的混合比例,探究其对铜基催化剂电催化CO_(2)还原性能的影响。实验结果表明,电解液中适量的水能够显著提高电解液的电导率和CO_(2)的溶解度,优化反应动力学,抑制析氢反应,并提升含碳产物的选择性。通过电化学测试和产物分析,发现n(BmimBF_(4))∶n(H_(2)O)=1∶5的电解液体系在CO_(2)还原反应中表现出最高的电流密度和法拉第效率,尤其是甲酸、甲醇和乙醇的生成显著增加。本研究为开发高效、稳定的CO_(2)RR电解液体系提供了理论依据和实验支持。 展开更多
关键词 CO_(2)RR 离子液体 电解液比例 含碳产物
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The synthesis of electrospun N-doped carbon nanofibers with embedded Fe_(2)N/Fe_(3)C species for catalyzing the O_(2)and CO_(2)reduction reactions
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作者 LV Xiu-zhen XU Xiang-xiang +3 位作者 YU Meng-meng WEI Yi-chen WANG Jun-ying WANG Jun-zhong 《新型炭材料(中英文)》 北大核心 2025年第2期333-353,共21页
The need for bi-functional catalysts that facilit-ate both the oxygen reduction(ORR)and carbon dioxide re-duction(CO_(2)RR)reactions arises from their potential to help solve the critical problems of carbon neutrality... The need for bi-functional catalysts that facilit-ate both the oxygen reduction(ORR)and carbon dioxide re-duction(CO_(2)RR)reactions arises from their potential to help solve the critical problems of carbon neutrality and renew-able energy conversion.However,there are few reports on the development of bi-functional catalysts for zinc-air bat-tery-driven CO_(2)RR devices.We introduce a novel approach for synthesizing Fe_(2)N/Fe_(3)C species embedded in nitrogen-doped carbon nanofibers by electrospinning a solution of Hemin and polyacrylonitrile in N,N-dimethylformamide.The material has an exceptional catalytic performance,with a half-wave potential of 0.91 V versus RHE for the ORR and values of over 90%for both the selectivity and Faradaic efficiency for the CO_(2)RR.The high catalytic performances are attrib-uted to the strong coupling between the Fe_(3)C/Fe_(2)N heterostructure and the Fe-N-C sites in the nitrogen-doped carbon nan-ofibers.Notably,both Fe_(3)C and Fe_(2)N play distinct roles in both the ORR and CO_(2)RR.This investigation indicates a way for designing advanced carbon-based bi-functional catalysts for use in this field. 展开更多
关键词 ELECTROSPUN Carbon nanofiber HETEROSTRUCTURE ORR CO_(2)RR
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RR_2函数与RR序的封闭性 被引量:1
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作者 曾宪福 宋海燕 《纺织高校基础科学学报》 CAS 2012年第2期166-168,共3页
讨论了RR2函数和RR序的封闭性.一方面,证明了RR2函数的线性封闭性、乘法封闭性和加法封闭性,并将RR2的概念延伸到随机RR序;另一方面,证明了随机变量在单调变换中保持RR序关系,特别是在线性运算中保持序关系.如果二维随机变量的密度函数... 讨论了RR2函数和RR序的封闭性.一方面,证明了RR2函数的线性封闭性、乘法封闭性和加法封闭性,并将RR2的概念延伸到随机RR序;另一方面,证明了随机变量在单调变换中保持RR序关系,特别是在线性运算中保持序关系.如果二维随机变量的密度函数是RR2的,则其分布函数和生存函数也是RR2的,并且随机变量的RR序关系在分布函数和生存函数也能保持. 展开更多
关键词 rr2函数 RR序 线性封闭性 乘法封闭性 加法封闭性
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Electrified Carbon Cycling for Neutralizing the Steelmaking Industry
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作者 Yihong Yu Ziyu Mei +5 位作者 Qi Zhang Chuangwei Liu Yan Sun Hao Zhang Gaowu Qin Song Li 《Carbon Energy》 2025年第7期99-106,共8页
The conventional steelmaking process emits 1.8 tons of CO_(2) to produce 1 ton of crude steel,making the steel industry the world's largest emitting manufacturing sector.Here,we propose and demonstrate a renewable... The conventional steelmaking process emits 1.8 tons of CO_(2) to produce 1 ton of crude steel,making the steel industry the world's largest emitting manufacturing sector.Here,we propose and demonstrate a renewable route based on electrified carbon cycling,which significantly reduces CO_(2) emission by 83%.The critical step of the route involves electrochemical CO_(2) reduction(CO_(2)RR)to produce CO-rich syngas,which reduces iron ore into metallic iron(Fe_(x)O_(y)-to-Fe),effectively closing the carbon cycling.A technoeconomic analysis(TEA)reveals that the energy efficiency of this novel process is dependent on the operating parameters of CO_(2)RR,with optimal efficiency occurring at the current density range of 150-200mAcm^(-2).As a proof-of-concept study,sulfur vacancy(V_(S))-engineered Ag_(3)CuS_(2) was developed as a high-performance CO_(2)RR electrocatalyst.This catalyst yields a CO-rich syngas at a high Faradaic efficiency(FE)close to 100%at a cell voltage of 2.5 V.The CO_(2)RR-produced syngas effectively reduced iron oxide into metallic iron.The implementation of electrified carbon cycling significantly increases the utilization of electricity in steel production,reaching 88.7%.This research describes a sustainable way to reshape the ironmaking process and ultimately neutralize the steel industry. 展开更多
关键词 carbon-neutral CO_(2)RR ELECTROCATALYSTS renewable energy STEELMAKING
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Stabilizing Cu^(2+)in perovskite via A-site modulation for efficient CO_(2)electrocatalysis to CH_(4)
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作者 Yuhan Zheng Yunzhen Jia +3 位作者 Xuelei Lang Dazhong Zhong Jinping Li Qiang Zhao 《Chinese Chemical Letters》 2025年第8期473-477,共5页
Cu^(2+)in copper-based catalysts can facilitate the hydrogenation of the CH_(4)production pathway via the electrochemical carbon dioxide reduction reaction(ECRR).However,Cu^(2+)species in copper oxides are unstable an... Cu^(2+)in copper-based catalysts can facilitate the hydrogenation of the CH_(4)production pathway via the electrochemical carbon dioxide reduction reaction(ECRR).However,Cu^(2+)species in copper oxides are unstable and have been revealed to reduce to Cu^(0)under the applied cathodic potential.In this work,we reported an A-site modulation strategy to stabilize Cu^(2+)in perovskite for efficient ECRR to CH_(4).After the introduction of Ca^(2+)in La_(2)CuO_(4),the obtained LaCa_(0.4)CuO_(3-δ)is stable during ECRR.We achieved a59.6%±3.8%CH4faradaic efficiency at-1.30 V versus reversible hydrogen electrode in H-cell and a partial current density of 155.0 m A/cm^(2)in membrane electrode assembly.DFT calculations and in situ Raman spectroscopy show that Cu^(2+)facilitates the hydrogenation of*CH_(2)O to*CH_(3)O and the further production of CH_(4).This work introduces an efficient strategy to stabilize Cu^(2+)and provides an understanding of Cu^(2+)in promoting ECRR to CH_(4). 展开更多
关键词 ECO_(2)RR ELECTROCATALYST PEROVSKITE A-site modulation CH_(4)
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Atomic cerium-doped CuO_(x) catalysts for efficient electrocatalytic CO_(2) reduction to CH_(4)
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作者 Xiangyu Chen Aihao Xu +4 位作者 Dong Wei Fang Huang Junjie Ma Huibing He Jing Xu 《Chinese Chemical Letters》 2025年第1期326-331,共6页
Copper(Cu)is widely used in the electrochemical carbon dioxide reduction reaction(ECO_(2)RR)for efficient methane(CH_(4))product.However,the morphology and valence of Cu-based catalysts are usually unstable under reac... Copper(Cu)is widely used in the electrochemical carbon dioxide reduction reaction(ECO_(2)RR)for efficient methane(CH_(4))product.However,the morphology and valence of Cu-based catalysts are usually unstable under reaction conditions.In this work,we prepared Ce-doped MOF-199 precursor(Ce/HKUST-1)and further obtained nanoparticle electrocatalyst Ce/CuO_(x)-NPs by cyclic voltammetry(CV)pretreatment.The Faradic efficiency of methane(FE_(CH_(4)))maintains above 62%within a broad potential window of 350 mV and the maximum FE_(CH_(4))reaches 67.4%with a partial current density of 293 mA/cm^(2)at-1.6 V vs.a reversible hydrogen electrode.Catalyst characterization and theoretical calculations revealed that the unique electronic structure and large ionic radius of Cerium(Ce)not only promoted the generation of key intermediate*CO but also lowered energy barrier of the*CO to*CHO step.This study provides a novel and efficient catalyst for methane production in ECO_(2)RR and offers profound insights into constructing high performance Cu-based catalysts. 展开更多
关键词 ECO_(2)RR Cu-based catalyst Structure evolution DFT calculation
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Electrochemical CO_(2)RR to C^(2+)products:A vision of dynamic surfaces of Cu-based catalysts
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作者 Jinxin Wang Jiaqi Zhang Chen Chen 《Chinese Journal of Catalysis》 2025年第1期83-102,共20页
Electrochemical reduction of CO_(2)(CO_(2)RR)to form high-energy-density and high-value-added multicarbon products has attracted much attention.Selective reduction of CO_(2)to C^(2+)products face the problems of low r... Electrochemical reduction of CO_(2)(CO_(2)RR)to form high-energy-density and high-value-added multicarbon products has attracted much attention.Selective reduction of CO_(2)to C^(2+)products face the problems of low reaction rate,complex mechanism and low selectivity.Currently,except for a few examples,copper-based catalysts are the only option capable of achieving efficient generation of C^(2+)products.However,the continuous dynamic reconstruction of the catalyst causes great difficulty in understanding the structure-performance relationship of CO_(2)RR.In this review,we first discuss the mechanism of C^(2+)product generation.The structural factors promoting C^(2+)product generation are outlined,and the dynamic evolution of these structural factors is discussed.Furthermore,the effects of electrolyte and electrolysis conditions are reviewed in a vision of dynamic surface.Finally,further exploration of the reconstruction mechanism of Cu-based catalysts and the application of emerging robotic AI chemists are discussed. 展开更多
关键词 ELECTROCATALYSIS CO_(2)RR Cu-based catalyst RECONSTRUCTION Multicarbon product Structural evolution
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High-throughput screening of axially bonded dual atom catalysts for enhanced electrocatalytic reactions: The effect of van der Waals interaction
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作者 Mohsen Tamtaji William A.Goddard III +1 位作者 Ziyang Hu GuanHua Chen 《Journal of Materials Science & Technology》 2025年第15期126-134,共9页
Single-and dual-atom catalysts(SACs and DACs)on single-layer graphene are widely investigated for a wide range of electrochemical reactions.However,the effect of van der Waals interactions on the activity of these cat... Single-and dual-atom catalysts(SACs and DACs)on single-layer graphene are widely investigated for a wide range of electrochemical reactions.However,the effect of van der Waals interactions on the activity of these catalysts has not been investigated through systematic high-throughput screening.Here we introduce the concept of van der Waals interactions through a double-layer DAC structure which has axial d orbital modification towards enhanced CO_(2) reduction reaction(CO_(2)RR),hydrogen evolution reaction(HER),oxygen reduction reaction(ORR),and oxygen evolution reaction(OER).We applied density functional theory(DFT)to screen 3d,4d,and 5d transition metals supported by double-layer nitrogen-doped graphene,denoted as M2N8.We sought catalysts with high thermodynamic and electrochemical stabilities along with low overpotentials for CO_(2)RR,ORR,OER,or HER.We find that HER can take place inside the van der Waals gap of V2N8 and Co2N8 leading to overpotentials of 0.10 and 0.16 V.Moreover,ORR and OER can take place on the surface of Fe2N8 and Ir2N8,respectively,leading to overpotentials of 0.39 and 0.37 V.DFT predicts a CO_(2)RR overpotential of 0.85 V towards CO on the surface of Co2N8 along with the HER overpotential of 0.16 V inside the van der Waals gap of Co2N8 towards the production of syngas(CO+H_(2)).This paper provides fundamental insights into the design of advanced multi-layer catalysts by applying the concept of van der Waals interactions for electrochemistry at room temperature. 展开更多
关键词 ORR OER HER CO_(2)RR CO_(2)capture SYNGAS DOUBLE-LAYER
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Atomic-level insights into the synergistic effect between ligands on electrochemical CO_(2) reduction:based on Au_(7)Ag_(8) series nanoclusters
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作者 Along Ma Yuansheng Li +6 位作者 Yang Zuo Shuo Zhang Yifei Wang Yonggang Ren Ejaz Hussain Xiaoshuang Ma Shuxin Wang 《Rare Metals》 2025年第7期4691-4700,共10页
Understanding the synergistic effect between ligands at the atomic level to control the catalytic selectivity of catalysts remains a significant challenge due to the complexity of ligand interactions and limitations i... Understanding the synergistic effect between ligands at the atomic level to control the catalytic selectivity of catalysts remains a significant challenge due to the complexity of ligand interactions and limitations in current analytical techniques.Herein,using precisely structured metal nanoclusters as models,we discovered that altering the electronegativity of substituents on donor thiolate ligands can modulate the bond dissociation energy of coordinated phosphine ligands on the clusters.This change leads to the selective dissociation of ligands during the catalytic process,thereby enabling control over catalytic selectivity with an abrupt increase in formate production from~0%to 23%.This work provides crucial insights into understanding ligand interactions on metal nanoparticle surfaces at the atomic level and lays the foundation for designing highly selective catalysts in the future. 展开更多
关键词 Metal nanocluster Synergistic effect eCO_(2)RR Active site Catalytic selectivity
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Perspectives of nickel-based catalysts in carbon dioxide electroreduction
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作者 Qing Liao Yijian Song +3 位作者 Weijie Li Duzheng He Anqiang Pan Chao Han 《Journal of Materials Science & Technology》 2025年第15期108-125,共18页
The electrochemical carbon dioxide reduction reaction(CO_(2)RR)can convert carbon dioxide into highvalue chemical substances and fuels by utilizing renewable electricity,which can not only complete the carbon cycle bu... The electrochemical carbon dioxide reduction reaction(CO_(2)RR)can convert carbon dioxide into highvalue chemical substances and fuels by utilizing renewable electricity,which can not only complete the carbon cycle but also effectively alleviate the problems of global warming and energy shortage.Nickelbased catalysts hold great promise and unbeatable merits for the electroreduction of carbon dioxide due to their excellent catalytic properties and activity.However,there were few review papers on the application of nickel-based catalysts in carbon dioxide electroreduction.This paper,therefore,presents the current status of research on nickel-based catalysts in carbon dioxide electroreduction categorized by different products.First,the advantages of CO_(2) electroreduction and nickel-based catalysts as well as the basic principles of CO_(2) electroreduction are presented;then the different types of nickel-based catalysts that can convert CO_(2) into different products are described in detail,including their syntheses,performances,and mechanisms.Finally,the common features of nickel-based catalysts towards different carbon dioxide electroreduction products,as well as the outlooks for the development of nickel-based catalysts will be summarized.It is highly expected that this review will help in the future research and development of nickel-based catalysts towards CO_(2) conversion. 展开更多
关键词 CO_(2)RR Nickel-based catalysts Carbon monoxide SYNGAS Formic acid Multi-carbon product
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