电催化剂
塔菲尔方程
过电位
纳米片
分解水
析氧
纳米花
双功能
化学工程
材料科学
阳极
制氢
联氨(抗抑郁剂)
沸石咪唑盐骨架
咪唑酯
阴极
催化作用
无机化学
化学
电化学
纳米技术
电极
纳米结构
物理化学
金属有机骨架
吸附
有机化学
工程类
光催化
色谱法
作者
Wentao Li,Tong Shi,Zhongbao Feng
标识
DOI:10.1016/j.jcis.2022.10.152
摘要
Employing hydrazine oxidation reaction (HzOR) to substitute oxygen evolution reaction (OER) has been regarded as a promising alternative to realize energy-saving hydrogen generation during water splitting. Herein, we introduce a combined experimental and theoretical investigation of zeolitic imidazolate framework-67 coupling with CoNiSe-3 (ZIF67@CoNiSe-3) as an efficient electrocatalyst towards both hydrogen evolution reaction (HER) and HzOR. The as-prepared ZIF67@CoNiSe-3 with nanoflower structure and highly porous ultrathin nanosheet arrays can endow advanced electrocatalytic properties for HER and HzOR. For instance, ZIF67@CoNiSe-3 demands a low overpotential of 49 mV to generate 10 mA·cm−2 with a small Tafel slope of 41.4 mV·dec-1 for HER, while it can also reach an ultrahigh current density of 400 mA cm−2 at 0.13 V vs reversible hydrogen electrode (RHE) with a small Tafel slope of 44.3 mV·dec-1 for HzOR. When using ZIF67@CoNiSe-3 as both cathode and anode in a two-electrode cell for overall hydrazine splitting (OHzS), it only needs an ultralow cell voltage of 0.45 V to produce 100 mA·cm−2 with a remarkable long-term stability of 30 h. Impressively, first-principles calculations (DFT) have been employed to investigate the electrocatalytic mechanisms of ZIF67@CoNi-3 for HER and HzOR. This research could provide an efficient strategy for energy-saving H2 production during water splitting by incorporating a low-cost yet high-performance bifunctional catalyst.
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