Atomically Dispersed Dual‑Metal Sites Showing Unique Reactivity and Dynamism for Electrocatalysis

作     者：Jun‑Xi Wu Wen‑Xing Chen Chun‑Ting He Kai Zheng Lin‑Ling Zhuo Zhen‑Hua Zhao Jie‑Peng Zhang Jun-Xi Wu;Wen-Xing Chen;Chun-Ting He;Kai Zheng;Lin-Ling Zhuo;Zhen-Hua Zhao;Jie-Peng Zhang

作者机构：MOE Key Laboratory of Bioinorganic and Synthetic ChemistrySchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationCollege of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022People’s Republic of China Energy&Catalysis CenterSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2023年第15卷第8期

页      面：192-204页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Key Research and Development Program of China(2021YFA1500401) the National Natural Science Foundation of China(21890380,21975290,21901089,and 21821003) the Foundation of Basic and Applied Basic Research of Guangdong Province(2020B1515120024) C.-T.H.acknowledges the Jiangxi Province(20202ZDB01004 and jxsq2018106041) 

主　　题：Metal-organic frameworks Atomically dispersed catalyst Hydrogen bond Overall water splitting 

摘      要：The real structure and in situ evolution of catalysts under working conditions are of paramount importance,especially for bifunctional ***,we report asymmetric structural evolution and dynamic hydrogen-bonding promotion mechanism of an atomically dispersed *** of Co/Ni-doped MAF-4/ZIF-8 yielded nitrogen-doped porous carbons functionalized by atomically dispersed Co–Ni dual-metal sites with an unprecedented N8V4 structure,which can serve as an efficient bifunctional electrocatalyst for overall water *** importantly,the electrocatalyst showed remarkable activation behavior due to the in situ oxidation of the carbon substrate to form C–OH *** functional theory calculations suggested that the flexible C–OH groups can form reversible hydrogen bonds with the oxygen evolution reaction intermediates,giving a bridge between elementary reactions to break the conventional scaling relationship.