过电位
电催化剂
材料科学
析氧
催化作用
化学工程
纳米柱
电解
阳极
制氢
电解水
分解水
镍
碱性水电解
无机化学
电极
纳米技术
电化学
纳米结构
冶金
电解质
化学
有机化学
物理化学
工程类
光催化
作者
Xiaoning Tong,Junli Wang,Yuantao Yang,Zhenwei Liu,Jing Wang,Can Zhang,Qingxiang Kong,Ruidong Xu,Linjing Yang
标识
DOI:10.1016/j.surfin.2024.104345
摘要
Currently, hydrogen production through water electrolysis stands out as one of the most promising methods. However, the efficiency of hydrogen production is limited by the anodic oxygen evolution reaction, which involves a four-electron transfer process. Therefore, the development of an efficient and durable anode catalyst is important to reduce energy consumption and increase the hydrogen production rate. Herein, the Mo-doped Ni3S2 nanopillar structures were successfully synthesized by hydrothermal process on nickel foam (NF). Subsequently, nanosheets of CoFe-layered double hydroxides (LDH) thin films were deposited to obtain the CoFe-LDH/Mo-Ni3S2/NF catalyst. Physical characterization results revealed polycrystalline properties of the CoFe LDH nanosheets, while a non-homogeneous interface was also formed with Mo-doped Ni3S2 nanopillars. The contact angle verified the excellent hydrophilicity, which allowed the rapid release of oxygen bubbles. In terms of electrocatalysis, the catalyst exhibited an overpotential of only 227 mV at 10 mA/cm2 and demonstrated remarkable current density retention after 100 h. The catalyst was also characterized by good retention of the current density at 10 mA/cm2. This work provided the strategy for designing efficient, inexpensive and durable catalysts.
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