联氨(抗抑郁剂)
杂原子
电池(电)
硒化锌
分解水
硒化物
材料科学
动力学
无机化学
镍
化学
催化作用
硒
有机化学
戒指(化学)
色谱法
功率(物理)
物理
量子力学
光催化
作者
Haoyu Wang,Lei Wang,Jin‐Tao Ren,Wenwen Tian,Minglei Sun,Zhong‐Yong Yuan
标识
DOI:10.1007/s40820-023-01128-z
摘要
Hydrazine-assisted water electrolysis is a promising energy conversion technology for highly efficient hydrogen production. Rational design of bifunctional electrocatalysts, which can simultaneously accelerate hydrogen evolution reaction (HER)/hydrazine oxidation reaction (HzOR) kinetics, is the key step. Herein, we demonstrate the development of ultrathin P/Fe co-doped NiSe2 nanosheets supported on modified Ni foam (P/Fe-NiSe2) synthesized through a facile electrodeposition process and subsequent heat treatment. Based on electrochemical measurements, characterizations, and density functional theory calculations, a favorable "2 + 2" reaction mechanism with a two-step HER process and a two-step HzOR step was fully proved and the specific effect of P doping on HzOR kinetics was investigated. P/Fe-NiSe2 thus yields an impressive electrocatalytic performance, delivering a high current density of 100 mA cm-2 with potentials of - 168 and 200 mV for HER and HzOR, respectively. Additionally, P/Fe-NiSe2 can work efficiently for hydrazine-assisted water electrolysis and Zn-Hydrazine (Zn-Hz) battery, making it promising for practical application.
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