催化作用
电解质
电催化剂
氢
碱性燃料电池
无机化学
交换电流密度
化学
金属
化学工程
材料科学
电化学
电极
物理化学
有机化学
工程类
塔菲尔方程
作者
Yuanjun Liu,Longkun Zuo,Zhihang Zhou,Junhao Zhang,Ziliang Kang,Jun Zhu,Guoxing Zhu
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:51 (40): 15467-15474
被引量:4
摘要
The development of hydrogen-oxygen fuel cells with an alkaline electrolyte was highly limited by the sluggish kinetics of the hydrogen oxidation reaction (HOR). Here, with a pyrolysis-reduction route, a new RuNi-based electrocatalyst was prepared, which presents an ultrathin nanowire-like structure. In alkaline media, this catalyst shows an excellent catalytic performance with an exchange current density of 1.10 mA cm-2disk for hydrogen oxidation. The exchange current density and mass activity of this catalyst are much higher than those of its single-metal counterparts and even the commercial Pt/C catalyst containing 20% Pt. Such a remarkable catalytic activity can be explained by the interaction between Ru and Ni; the incorporation of Ni may induce an electronic effect on the optimization of the Ru-Had strength and provide a functional surface that can absorb OH species, thus boosting the catalytic activity. These findings may cast a new light on the exploration of low-cost but high-efficiency catalysts for fuel cells.
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