石墨氮化碳
多金属氧酸盐
过电位
氮化碳
化学
塔菲尔方程
纳米材料
化学工程
析氧
催化作用
共价键
无机化学
电化学
电催化剂
氧化还原
材料科学
纳米技术
有机化学
电极
光催化
物理化学
工程类
作者
Samaneh Shahsavarifar,Majid Masteri‐Farahani,Mohammad Reza Ganjali
出处
期刊:Langmuir
[American Chemical Society]
日期:2022-09-26
卷期号:38 (40): 12124-12131
被引量:2
标识
DOI:10.1021/acs.langmuir.2c01096
摘要
A new photoelectrocatalyst for the water oxidation process is designed by immobilizing [CoW12O40]6– (CoW12) heteropolyanions on the surface of covalently modified graphitic carbon nitride nanosheets (g-C3N4). For this purpose, g-C3N4 is first modified with cysteamine hydrochloride through the well-known thiol-ene click reaction. Afterward, [CoW12O40]6– heteropolyanions are immobilized on the surface of modified g-C3N4 nanosheets with electrostatic interaction with ammonium groups. After confirming the preparation of CoW12/clicked g-C3N4 with various physicochemical methods, its photoelectrocatalytic activity is evaluated in the oxygen evolution reaction. The CoW12/clicked g-C3N4 exhibits a low onset potential of 1.32 V versus NHE and a low overpotential of 230 mV at 10 mA cm–2 with a low Tafel slope of 67 mV dec–1 under visible light illumination. Moreover, the stability of the catalyst is investigated through the chronoamperometric measurements.
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