Heterointerface engineering of assembled CoP_(2) on N-modified carbon as efficient trifunctional electrocatalysts for Zn-Air batteries and overall water splitting  

作　　者：Yan Chen Zhenrui Yang Juan Wang Yun Yang Xuedong He Yang Wang Jiadong Chen Yaqing Guo Xin Wang Shun Wang Huile Jin 

机构地区：[1]Wenzhou Key Lab of Advanced Energy Storage and Conversion,Zhejiang Province Key Lab of Leather Engineering,College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325035,China [2]Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices,Institute of New Materials and Industrial Technologies,Wenzhou University,Wenzhou 325035,China [3]School of Chemical and Biomedical Engineering,Nanyang Technological University,Singapore 637459,Singapore

出　　处：《Nano Research》2024年第5期3801-3809,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51872209,52171145,21972106,22105146);Zhejiang Province Natural Science Foundation project key project(No.LZ20B030001);Zhejiang Provincial Special Support Program for High-level Talents(No.2019R52042).

摘　　要：Enhancing catalytic activity through modulating the interaction between N-doped carbon and metal phosphides clusters is an effective approach.Herein,the electronic structure modulation of CoP_(2) supported N-modified carbon(CoP_(2)/NC)has been designed and prepared as efficient electrocatalysts for oxygen reduction reaction(ORR),oxygen evolution reaction(OER),and hydrogen evolution reaction(HER).Notably,CoP_(2)/NC-1 catalyst exhibits impressive performance in alkaline media,with an ORR half-wave potential of 0.84 V,as well as OER and HER overpotentials of 290 and 129 mV(at 10 mA·cm^(−2)),respectively.In addition,CoP_(2)/NC-1 produces a power density as high as 172.9 mW·cm^(−2),and excellent reversibility of 100 h at 20 mA·cm^(−2) in home-made Zn-air batteries.The experimental results demonstrate that the synergistic interactions between N modified carbon substrate and CoP_(2) material significantly enhance the kinetics of ORR,OER,and HER.Density functional theory(DFT)calculations reveal the strong electrons redistribution of CoP_(2) induced by high-density N atoms at the interface,thus optimizing the key intermediates and significantly lower the energy barrier of reactions.These electronic adjustments of CoP_(2) greatly enhance its kinetics of ORR/OER/HER,leading to faster reactions.This study provides profound insights into the specific modification of CoP_(2) by N-doped carbon,enabling the construction of efficient catalysts.

关 键 词：two-dimensional(2D)carbon metal-organic framework cobalt phosphide zinc air battery water splitting 

分 类 号：O64[理学—物理化学]