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Self-Supporting Clusters Constituted of Nitrogen-Doped CoMoO4 Nanosheets for Efficiently Catalyzing the Hydrogen Evolution Reaction in Alkaline Media
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-05-21 , DOI: 10.1021/acssuschemeng.0c02283 Weiwei Xie 1 , Tongwen Yu 1 , Zuqiao Ou 1 , Jianlin Zhang 2 , Ruchun Li 2 , Shuqin Song 2 , Yi Wang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-05-21 , DOI: 10.1021/acssuschemeng.0c02283 Weiwei Xie 1 , Tongwen Yu 1 , Zuqiao Ou 1 , Jianlin Zhang 2 , Ruchun Li 2 , Shuqin Song 2 , Yi Wang 1
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Transition metal oxides (TMOs) have acquired much attention on account of their abundant reserves and variable components, but sluggish charge transfer rate, limited electrochemically active sites, and poor conductivity hamper their extensive applications in the hydrogen evolution reaction (HER). Herein, we have synthesized nitrogen-doped CoMoO4 clusters constituted of nanosheets directly supported on nickel foam (N-CoMoO4/NF) by combining a hydrothermal process and low-temperature ammonia annealing treatment. Experimental results reveal that the nitrogen doping can modulate the electronic structure of CoMoO4, in which Mo ions with +6 valence are reduced to a lower state, and thus enhance its catalytic performance for HER. The optimized N-CoMoO4/NF (N-CoMoO4/NF-1, with the annealing time of 1 h in NH3 atmosphere) exhibits excellent activity toward alkaline HER, requiring an overpotential of 58 mV at 10 mA/cm2. This work possesses great potential for promoting alkaline HER performance of TMOs by the facile process of nitrogen doping.
中文翻译：
氮掺杂的CoMoO 4纳米片构成的自支撑簇，可有效催化碱性介质中的产氢反应
过渡金属氧化物（TMOs）由于其丰富的储备和可变的成分而备受关注，但电荷传输速率低，电化学活性位点有限和电导率差会妨碍它们在制氢反应（HER）中的广泛应用。在本文中，我们通过将水热工艺和低温氨退火处理相结合，合成了由直接负载在镍泡沫上的纳米片构成的氮掺杂CoMoO 4团簇（N-CoMoO 4 / NF）。实验结果表明，氮掺杂可以调节CoMoO 4的电子结构，其中+6价的Mo离子被还原成较低的态，从而增强了其对HER的催化性能。优化的N-CoMoO 4/ NF（N-CoMoO 4 / NF-1，在NH 3气氛中退火时间为1 h ）对碱性HER表现出优异的活性，在10 mA / cm 2下需要58 mV的过电势。这项工作具有通过氮掺杂的简便过程促进TMOs碱性HER性能的巨大潜力。
更新日期：2020-06-23
中文翻译：
氮掺杂的CoMoO 4纳米片构成的自支撑簇，可有效催化碱性介质中的产氢反应
过渡金属氧化物（TMOs）由于其丰富的储备和可变的成分而备受关注，但电荷传输速率低，电化学活性位点有限和电导率差会妨碍它们在制氢反应（HER）中的广泛应用。在本文中，我们通过将水热工艺和低温氨退火处理相结合，合成了由直接负载在镍泡沫上的纳米片构成的氮掺杂CoMoO 4团簇（N-CoMoO 4 / NF）。实验结果表明，氮掺杂可以调节CoMoO 4的电子结构，其中+6价的Mo离子被还原成较低的态，从而增强了其对HER的催化性能。优化的N-CoMoO 4/ NF（N-CoMoO 4 / NF-1，在NH 3气氛中退火时间为1 h ）对碱性HER表现出优异的活性，在10 mA / cm 2下需要58 mV的过电势。这项工作具有通过氮掺杂的简便过程促进TMOs碱性HER性能的巨大潜力。
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