分解水
析氧
催化作用
电解水
磷化物
双功能
材料科学
化学工程
贵金属
电解
制氢
氢
铱
氧化物
氢燃料
铂金
过电位
镍
金属
光催化
化学
冶金
电化学
电极
有机化学
物理化学
工程类
电解质
生物化学
作者
Yu Fang,Haiqing Zhou,Yu-Feng Huang,Jingying Sun,Fan Qin,Jiming Bao,William A. Goddard,Shuo Chen,Zhifeng Ren
标识
DOI:10.1038/s41467-018-04746-z
摘要
Abstract Water electrolysis is an advanced energy conversion technology to produce hydrogen as a clean and sustainable chemical fuel, which potentially stores the abundant but intermittent renewable energy sources scalably. Since the overall water splitting is an uphill reaction in low efficiency, innovative breakthroughs are desirable to greatly improve the efficiency by rationally designing non-precious metal-based robust bifunctional catalysts for promoting both the cathodic hydrogen evolution and anodic oxygen evolution reactions. We report a hybrid catalyst constructed by iron and dinickel phosphides on nickel foams that drives both the hydrogen and oxygen evolution reactions well in base, and thus substantially expedites overall water splitting at 10 mA cm −2 with 1.42 V, which outperforms the integrated iridium (IV) oxide and platinum couple (1.57 V), and are among the best activities currently. Especially, it delivers 500 mA cm −2 at 1.72 V without decay even after the durability test for 40 h, providing great potential for large-scale applications.
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