纳米片
电催化剂
双金属
无机化学
催化作用
材料科学
氢氧化物
镍
硫化物
电化学
化学工程
化学
电极
纳米技术
冶金
有机化学
物理化学
工程类
作者
Haoyuan Li,Yujuan Pu,Wenhao Li,Zitong Yan,Ruojing Deng,Fanyue Shi,Chenhao Zhao,Youkui Zhang,Tao Duan
出处
期刊:Small
[Wiley]
日期:2024-06-14
标识
DOI:10.1002/smll.202403311
摘要
Abstract Developing a highly efficient catalyst for electrocatalytic urea oxidation reaction (UOR) is not only beneficial for the degradation of urea pollutants in wastewater but also provides a benign route for hydrogen production. Herein, a sulfur‐vacancy (S v ) engineering is proposed to accelerate the formation of metal (oxy)hydroxide on the surface of Ni‐Co bimetal sulfide nanosheet arrays on nickel foam (S v ‐CoNiS@NF) for boosting the urea oxidation electrocatalysis. As a result, the obtained S v ‐CoNiS@NF demonstrates an outstanding electrocatalytic UOR performance, which requires a low potential of only 1.397 V versus the reversible hydrogen electrode to achieve the current density of 100 mA cm −2 . The ex situ Raman spectra and density functional theory calculations reveal the key roles of the S v site and Co 9 S 8 in promoting the electrocatalytic UOR performance. This work provides a new strategy for accelerating the transformation of electrocatalysts to active metallic (oxy)hydroxide for urea electrolysis via engineering the surface vacancies.
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