过电位
双功能
催化作用
电解
联氨(抗抑郁剂)
脱氢
阳极
双功能催化剂
制氢
氢
化学
歧化
化学工程
无机化学
材料科学
电极
有机化学
电化学
物理化学
色谱法
工程类
电解质
作者
Yapeng Li,Jihua Zhang,Yi Liu,Qizhu Qian,Ziyun Li,Yin Zhu,Genqiang Zhang
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2020-10-30
卷期号:6 (44)
被引量:174
标识
DOI:10.1126/sciadv.abb4197
摘要
Replacing the sluggish anode reaction in water electrolysis with thermodynamically favorable hydrazine oxidation could achieve energy-efficient H2 production, while the shortage of bifunctional catalysts limits its scale development. Here, we presented the scalable one-pot synthesis of partially exposed RuP2 nanoparticle-decorated carbon porous microsheets, which can act as the superior bifunctional catalyst outperforming Pt/C for both hydrazine oxidation reaction and hydrogen evolution reaction, where an ultralow working potential of -70 mV and an ultrasmall overpotential of 24 mV for 10 mA cm-2 can be achieved. The two-electrode electrolyzer can reach 10 mA cm-2 with a record-low cell voltage of 23 mV and an ultrahigh current density of 522 mA cm-2 at 1.0 V. The DFT calculations unravel the notability of partial exposure in the hybrid structure, as the exposed Ru atoms are the active sites for hydrazine dehydrogenation, while the C atoms exhibit a more thermoneutral value for H* adsorption.
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