催化作用
双功能
电化学
双功能催化剂
氢
可逆氢电极
化学
无机化学
电极
物理化学
工作电极
有机化学
作者
Yuting Yang,Xueguang Shao,Shuqing Zhou,Puxuan Yan,Tayirjan Taylor Isimjan,Xiulin Yang
出处
期刊:Chemsuschem
[Wiley]
日期:2021-06-17
卷期号:14 (14): 2992-3000
被引量:26
标识
DOI:10.1002/cssc.202100893
摘要
Abstract Designing a bifunctional catalyst for hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) is significant toward developing sustainable hydrogen‐electric conversion systems. Herein, a cost‐effective bifunctional catalyst, Ru/N‐doped Carbon@WO 3 ‐W 2 C (Ru/NC@WOC), was developed via co‐precipitation and polyol reduction. Ru/NC@WOC showed superior HOR/HER activity in alkaline solution in comparison with commercial Pt/C. HOR electrochemical tests showed that the mass activity at 0.05 V (1.96 ) and exchange‐current density were 7.5 and 1.2 times that of Pt/C. Additionality, Ru/NC@WOC exhibited up 30‐fold HOR activity in mass activity compared with benchmark Ru/C. Moreover, it also displayed exceptional electrocatalytic HER with overpotentials of 31 mV at 10 mA cm −2 and 119 mV at 100 mA cm −2 , surpassing Pt/C, benchmark Ru/C, and most of the previously reported electrocatalysts. The outstanding catalytic activity of Ru/NC@WOC probably arises from the synergy between Ru and NC@WOC matrix, suitable hydrogen binding energy, and highly conductive substrate. Thus, this work may pave a new avenue to fabricate low‐cost bifunctional HOR/HER catalysts for alkaline fuel cells and water electrolyzer.
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