Yanxiang He, Meilian Tu, Weijiang Gan, Zhixiao Zhu, Muhammad Mushtaq, Mohammad Al-Mamun, Jianqiu Deng, Hao Yang, Zhongmin Wang, M-Sadeeq Balogun
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引用次数: 0
摘要
在碱性淡水/海水电解中使用持久高效的铁基电催化剂是非常理想的，但一直是一个重大挑战。在此，我们报告了一种在泡沫镍（NF@FMO/MN）上的耐用且坚固的异质掺氮 FeMoO4/Mo2N 棒状催化剂，其在碱性淡水/海水电解质中的氢进化反应（HER）低过电位分别为 23/29 mV@10 mA cm-2 和 112/159 mV@100 mA cm-2。这些结果明显优于原始的 FeMoO4 催化剂。理论计算一致表明，N-FeMoO4 和 Mo2N 的结合可有效降低水活化能势垒，调节缓慢的水解离动力学，并加速氢吸附过程，从而实现高效的 HER。所设计的 NF@FMO/MN 催化剂 HER 性能的提高归功于 N 掺杂 FeMoO4 和 Mo2N 之间的原位异界面工程。本研究成果推动了铁钼基电催化剂在碱性淡水/海水电解中的应用。
Efficient Alkaline Freshwater/Seawater Hydrogen Production via Heterogeneous N-Doped FeMoO4/Mo2N Rod-Shaped Electrocatalysts.
Durable and efficient Fe-based electrocatalysts in alkaline freshwater/seawater electrolysis is highly desirable but persists a significant challenge. Herein, we report a durable and robust heterogenous nitrogen-doped FeMoO4/Mo2N rod-shaped catalyst on nickel foam (denoted NF@FMO/MN) affording hydrogen evolution reaction (HER) low overpotentials of 23/29 mV@10 mA cm-2 and 112/159 mV@100 mA cm-2 in both alkaline freshwater/seawater electrolytes, respectively. These results are significantly superior to the pristine FeMoO4 catalyst. Theoretical calculations consistently reveals that the combination of N-FeMoO4 and Mo2N effectively reduces water activation energy barrier, modulates the sluggish water-dissociation kinetics and accelerates the hydrogen adsorption process for efficient HER. The enhanced HER performance of the as-designed NF@FMO/MN catalyst is attributed to the in situ hetero-interfacial engineering between N-doped FeMoO4 and Mo2N. This present work nurtures the progress of FeMo-based electrocatalysts in alkaline freshwater/seawater electrolysis.
期刊介绍：
ChemSusChem
Impact Factor (2016): 7.226
Scope:
Interdisciplinary journal
Focuses on research at the interface of chemistry and sustainability
Features the best research on sustainability and energy
Areas Covered:
Chemistry
Materials Science
Chemical Engineering
Biotechnology
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