摘要
开发高性能和高稳定性的双功能RuO_(2)基电催化剂是全解水制氢的关键。本文采用共沉淀、吸附和煅烧等处理方法,成功制备了RuO_(2)/Co_(3)O_(4)@NC复合材料。通过电化学测试研究复合材料的电解水催化性能及长时间运行稳定性。测试结果表明,在电流密度为10 mA·cm^(-2)时,RuO_(2)/Co_(3)O_(4)@NC电极的析氢反应过电位仅为53 mV,并且在10 mA·cm^(-2)电流密度下连续稳定运行100 h;在10 mA·cm^(-2)电流密度下,RuO_(2)/Co_(3)O_(4)@NC电极的析氧反应过电位为200 mV,并且在此电流密度下连续稳定运行100 h。将RuO_(2)/Co_(3)O_(4)@NC组成碱性全分解水电解池,仅需1.40 V即可达到10 mA·cm^(-2)的电流密度,驱动电压明显低于20%Pt/C||商用RuO_(2)电解池(1.61 V)。且该电解池在10 mA·cm^(-2)下稳定运行80 h。研究结果表明,RuO_(2)与Co_(3)O_(4)构建异质结构可以有效提升其析氢反应(HER)和析氧反应(OER)性能;表面的氮掺杂碳壳层有效提升复合材料的HER和OER长时间运行稳定性。
The development of bifunction RuO_(2)-based electrocatalysts with high performance and stability is the key to complete water splitting for hydrogen production.RuO_(2)/Co_(3)O_(4)@NC composite was successfully prepared by coprecipitation,adsorption and calcination.The performance and long-term stability of the composite were studied by electrochemical testing.The test results show that the hydrogen evolution overpotential of RuO_(2)/Co_(3)O_(4)@NC electrode is only 53 mV when the current density is 10 mA·cm^(−2),and it is continuously stable for 100 h at 10 mA·cm^(−2) current density.At a current density of 10 mA·cm^(−2),the overpotential of the oxygen evolution reaction of the RuO_(2)/Co_(3)O_(4)@NC electrode is 200 mV,and it is operated continuously and stably for 100 h at this current density.When RuO_(2)/Co_(3)O_(4)@NC is formed into an alkaline total decomposition hydrolysis cell,the voltage is only 1.40 V to reach the current density of 10 mA·cm^(−2),which is significantly lower than that of 20%Pt/C||commercial RuO_(2) electrolytic cell(1.61 V).The cell runs stably for 80 h at 10 mA·cm^(−2).The results show that the heterostructure of RuO_(2) and Co_(3)O_(4) can effectively improve hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)performance.The surface of nitrogen-doped carbon shell can effectively improve the long-term HER and OER stability of the composite.
作者
李晓
赵栎
余加源
凌意瀚
LI Xiao;ZHAO Li;YU Jiayuan;LING Yihan(School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,China;Institute for Advanced Interdisciplinary Research(iAIR),School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022,China;Zhejiang Hehui Sludge Disposal Co.,Ltd.,Jiaxing 314201,China)
出处
《复合材料学报》
北大核心
2025年第11期6345-6353,共9页
Acta Materiae Compositae Sinica
基金
国家重点研发计划(2021YFA1501900)
江苏省碳资源清洁利用重点实验室研究项目(BM2024007)
国家自然科学基金(52202092)
山东省自然科学基金(ZR2022QE076)
山东省高等学校青创科技支持计划(2023KJ104)。
关键词
电催化
析氢反应
析氧反应
氧化钌
四氧化三钴
electrolysis
hydrogen evolution reaction(HER)
oxygen evolution reaction(OER)
RuO_(2)
Co_(3)O_(4)
