联氨(抗抑郁剂)
双金属片
催化作用
磷化物
制氢
电化学
电解
无机化学
氢
材料科学
阳极
化学
电极
有机化学
电解质
色谱法
物理化学
作者
Libo Zhu,Jian Huang,Guangyao Meng,Tiantian Wu,Chang Chen,Han Tian,Yafeng Chen,Fantao Kong,Ziwei Chang,Xiangzhi Cui,Jianlin Shi
标识
DOI:10.1038/s41467-023-37618-2
摘要
Substituting hydrazine oxidation reaction for oxygen evolution reaction can result in greatly reduced energy consumption for hydrogen production, however, the mechanism and the electrochemical utilization rate of hydrazine oxidation reaction remain ambiguous. Herein, a bimetallic and hetero-structured phosphide catalyst has been fabricated to catalyze both hydrazine oxidation and hydrogen evolution reactions, and a new reaction path of nitrogen-nitrogen single bond breakage has been proposed and confirmed in hydrazine oxidation reaction. The high electro-catalytic performance is attributed to the instantaneous recovery of metal phosphide active site by hydrazine and the lowered energy barrier, which enable the constructed electrolyzer using bimetallic phosphide catalyst at both sides to reach 500 mA cm-2 for hydrogen production at 0.498 V, and offer an enhanced hydrazine electrochemical utilization rate of 93%. Such an electrolyzer can be powered by a bimetallic phosphide anode-equipped direct hydrazine fuel cell, achieving self-powered hydrogen production at a rate of 19.6 mol h-1 m-2.
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