电催化剂
过电位
析氧
电解
碱性水电解
电化学
分解水
化学工程
材料科学
阳极
电解水
电解质
无机化学
纳米片
催化作用
电极
化学
纳米技术
光催化
工程类
生物化学
物理化学
作者
Asiya M. Tamboli,Younghan Jung,Ji Hoon Sim,Bong‐Hyun Kim,Wan Sik Kim,Min-Joong Kim,Changsoo Lee,K. W. Kim,Chang-Hyuck Lim,Kyong‐Hwan Kim,Hyunseok Cho,Chang Hee Kim
出处
期刊:Chemosphere
[Elsevier]
日期:2023-12-01
卷期号:344: 140314-140314
被引量:4
标识
DOI:10.1016/j.chemosphere.2023.140314
摘要
This work demonstrates a simple and scalable methodology for the binder-free direct growth of Mo-doped NiFe-layered double hydroxides on a nickel substrate via an electrodeposition route at room temperature. A three-dimensional (3D) nanosheet array morphology of the electrocatalyst provides immense electrochemical surface area as well as abundant catalytically active sites. Mo incorporation in the NiFe-LDH plays a crucial role in regulating the catalytic activity of oxygen evolution reaction (OER). The prepared electrocatalyst exhibited low overpotential (i.e., 230 mV) at 30 mA cm-2 for OER in an alkaline electrolyte (i.e., 1 M KOH). Furthermore, the optimized Mo-doped NiFe-LDH electrode was used as an anode in a laboratory-scale in situ single cell test system for alkaline water electrolysis at 80 °C with a continuous flow of 30 wt% KOH, and it shows the efficient electrochemical performance with a lower cell voltage of 1.80 V at a current density of 400 mA cm-2. In addition, an admirable long-term cell durability is also demonstrated by the cell for 24 h. This work encourages new designs and further development of electrode material for alkaline water electrolysis on a commercial scale.
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