A composite electrocatalyst,CoMoNiO-S/NF-110(NF is nickel foam),was synthesized through electrodeposition,followed by pyrolysis and then the vulcanization process.CoMoNiO-S/NF-110 exhibited a structure where Ni3S2 and...A composite electrocatalyst,CoMoNiO-S/NF-110(NF is nickel foam),was synthesized through electrodeposition,followed by pyrolysis and then the vulcanization process.CoMoNiO-S/NF-110 exhibited a structure where Ni3S2 and Mo2S3 nanoparticles were integrated at the edges of Co3O4 nanosheets,creating a rich,heterogeneous interface that enhances the synergistic effects of each component.In an alkaline electrolyte,the synthesized CoMoNiO-S/NF-110 exhibited superior electrocatalytic performance for oxygen evolution reaction(OER),achieving current densities of 100 and 200 mA·cm^(-2) with low overpotentials of 199.4 and 224.4 mV,respectively,outperforming RuO2 and several high-performance Mo and Ni-based catalysts.This excellent performance is attributed to the rich interface formed between the components and active sites exposed by the defect structure.展开更多
迪士尼电影《102斑点狗》风靡全世界,现在这股旋风要刮到日本啦!这部深受小朋友喜爱的电影3月10日在日本公映,为了宣传此片,电影公司还专门请来一支形象可爱的偶像组合——MiniMoni 来做宣传。 Mini Moni 包括 Morning娘中的矢口真里、...迪士尼电影《102斑点狗》风靡全世界,现在这股旋风要刮到日本啦!这部深受小朋友喜爱的电影3月10日在日本公映,为了宣传此片,电影公司还专门请来一支形象可爱的偶像组合——MiniMoni 来做宣传。 Mini Moni 包括 Morning娘中的矢口真里、过希美、加护亚依和Coconut 娘中的 Mika 四位成员,由于她们个个都是年仅十八以下的少女,而且身高全部在1.5米以下,因此称为 Mini Moni(Mini Morning 娘的简称)。说起 Mini Moni 的组成,原来还有一段趣事呢。众所周知 Morning 娘经过一番离离合合,展开更多
Catalysts play a critical role in improving the hydrogen storage kinetics in Mg/MgH2 system.Exploring highly efficient catalysts and catalyst design principles are hot topics but challenging.The catalytic activity of ...Catalysts play a critical role in improving the hydrogen storage kinetics in Mg/MgH2 system.Exploring highly efficient catalysts and catalyst design principles are hot topics but challenging.The catalytic activity of metallic elements on dehydrogenation kinetics generally follows a sequence of Ti>Nb>Ni>V>Co>Mo.Herein,we report a highly efficient alloy catalyst composed of low-active elements of Mo and Ni(i.e.MoNi alloy)for MgH2 particles.MoNi alloy nanoparticles show excellent catalytic effect,even outperforming most advanced Ti-based catalysts.The synergy between Mo and Ni elements can promote the break of Mg-H bonds and the dissociation of hydrogen molecules,thus significantly improves the kinetics of Mg/MgH2 system.The MoNi-catalyzed Mg/MgH2 system can absorb and release 6.7 wt.%hydrogen within 60 s and 10 min at 300℃,respectively,and exhibits excellent cycling stability and low-temperature hydrogen storage performance.This study provides a strategy for designing efficient catalysts for hydrogen storage materials using the synergy of metal elements.展开更多
文摘A composite electrocatalyst,CoMoNiO-S/NF-110(NF is nickel foam),was synthesized through electrodeposition,followed by pyrolysis and then the vulcanization process.CoMoNiO-S/NF-110 exhibited a structure where Ni3S2 and Mo2S3 nanoparticles were integrated at the edges of Co3O4 nanosheets,creating a rich,heterogeneous interface that enhances the synergistic effects of each component.In an alkaline electrolyte,the synthesized CoMoNiO-S/NF-110 exhibited superior electrocatalytic performance for oxygen evolution reaction(OER),achieving current densities of 100 and 200 mA·cm^(-2) with low overpotentials of 199.4 and 224.4 mV,respectively,outperforming RuO2 and several high-performance Mo and Ni-based catalysts.This excellent performance is attributed to the rich interface formed between the components and active sites exposed by the defect structure.
文摘迪士尼电影《102斑点狗》风靡全世界,现在这股旋风要刮到日本啦!这部深受小朋友喜爱的电影3月10日在日本公映,为了宣传此片,电影公司还专门请来一支形象可爱的偶像组合——MiniMoni 来做宣传。 Mini Moni 包括 Morning娘中的矢口真里、过希美、加护亚依和Coconut 娘中的 Mika 四位成员,由于她们个个都是年仅十八以下的少女,而且身高全部在1.5米以下,因此称为 Mini Moni(Mini Morning 娘的简称)。说起 Mini Moni 的组成,原来还有一段趣事呢。众所周知 Morning 娘经过一番离离合合,
基金This work was financially supported by the National Natural Science Foundation of China(Nos.51971008,U1832138,51731002 and 51920105001)Beijing Municipal Natural Science Foundation(No.2172031)Fundamental Research Funds for the Central Universities.
文摘Catalysts play a critical role in improving the hydrogen storage kinetics in Mg/MgH2 system.Exploring highly efficient catalysts and catalyst design principles are hot topics but challenging.The catalytic activity of metallic elements on dehydrogenation kinetics generally follows a sequence of Ti>Nb>Ni>V>Co>Mo.Herein,we report a highly efficient alloy catalyst composed of low-active elements of Mo and Ni(i.e.MoNi alloy)for MgH2 particles.MoNi alloy nanoparticles show excellent catalytic effect,even outperforming most advanced Ti-based catalysts.The synergy between Mo and Ni elements can promote the break of Mg-H bonds and the dissociation of hydrogen molecules,thus significantly improves the kinetics of Mg/MgH2 system.The MoNi-catalyzed Mg/MgH2 system can absorb and release 6.7 wt.%hydrogen within 60 s and 10 min at 300℃,respectively,and exhibits excellent cycling stability and low-temperature hydrogen storage performance.This study provides a strategy for designing efficient catalysts for hydrogen storage materials using the synergy of metal elements.
