析氧
双功能
分解水
电催化剂
镍
阳极
阴极
电解
化学工程
电解水
材料科学
无机化学
金属有机骨架
化学
电化学
催化作用
电解质
电极
冶金
物理化学
有机化学
光催化
吸附
工程类
作者
Jin Lin,Hong Wang,Chao Wang,Li Guo,Yanzhong Wang
标识
DOI:10.1016/j.electacta.2023.143300
摘要
Metal-organic frameworks (MOFs) are considered as prospective electrocatalysts for water splitting due to their adjustable pore structure and abundant active sites. However, the rational design of MOFs with excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performances is still an enormous challenge. Herein, Ru-doped nickel thiophene dicarboxylic acid (Ni-TDA)/nickel foam (NF) were prepared via a one-pot solvothermal method, and their morphologies and electronic structures can be facilely modulated by Ru doping contents. The as-prepared self-supporting Ni5Ru-TDA/NF with Ni/Ru molar ratio of 5:1 show the excellent OER and HER activities with low overpotentials of 235 and 35 mV at a current density of 10 mA cm−2 in 1 M KOH, respectively. Furthermore, Ni5Ru-TDA/NF indicate the remarkable stability during the process of OER and HER with the slight decrease after the stability test of 60 h. The excellent electrocatalytic activities can be attributed to high intrinsic activity of multiple Ru species, the synergistic effect of Ru and Ni sites and abundance active sites in Ru-doped Ni-TDA. The water electrolysis system using Ni5Ru-TDA/NF as the anode and cathode, respectively, can achieve a current density of 10 mA cm−2 with a cell voltage of only 1.53 V, which is promising for practical applications.
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