Boosting oxygen evolution reactivity by modulating electronic structure and honeycomb-like architecture in Ni_(2)P/N,P-codoped carbon hybrids  

作　　者：Menglei Yuan Yu Sun Yong Yang Jingxian Zhang Sobia Dipazir Tongkun Zhao Shuwei Li Yongbing Xie He Zhao Zhanjun Liu Guangjin Zhang 

机构地区：[1]CAS Key Laboratory of Green Process Engineering,Institute of Process Engineering,Chinese Academy of Sciences,100190,Beijing,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,100049,Beijing,China [3]School of Science,North University of China,030051,Taiyuan,China [4]Institute of Environmental Reference Materials of Ministry of Ecology and Environment,100029,Beijing,China [5]CAS Key Laboratory of Carbon Materials,Institute of Coal Chemistry,ChineseAcademy of Sciences,030001,Taiyuan,China

出　　处：《Green Energy & Environment》2021年第6期866-874,共9页绿色能源与环境（英文版）

基　　金：supported by the Major Science and Technology Program for Water Pollution Control and Treatment(2017ZX07402001);the Ministry of Science and Technology of China for their financial support and the associated project is the Key Program for International S&T Cooperation Projects(No.2018YFE0124600)。

摘　　要：Oxygen evolution reaction(OER)as the foremost stumbling block to generate cost-effective clean fuels has received extensive attention in recent years.But,it still maintains the challenge to manipulate the geometric and electronic structure during single reaction process under the same conditions.Herein,we report a simple self-template strategy to generate honeycomb-like Ni_(2)P/N,P-C hybrids with preferred electronic architecture.Experiments coupled with theoretical results revealed that the synthesized catalyst has two characteristics:firstly,the unique honeycomb-like morphology not only enables the fully utilization of catalytic active sites but also optimizes the mass/electron transportation pathway,which favor the diffusion of electrolyte to accessible active sites.Secondly,N,P-C substrate,on the one hand,largely contributes the electronic distribution near Fermi level(E_(F))thus boosting its electrical conductivity.On the other hand,the support effect result in the upshift of d-band center and electropositivity of Ni sites,which attenuates the energy barrier for the adsorption of OH~àand the formation of*OOH.In consequence,the optimized Ni_(2)P/N,P-C catalysts feature high electrocatalytic activity towards OER(a low overpotential of 252 m V to achieve10 m A cm^(-2))and 10 h long-term stability,the outstanding performance is comparable to most of transition metal catalysts.This work gives a innovative tactics for contriving original OER electrocatalysts,inspirng deeper understanding of fabricating catalysts by combining theoretical simulation and experiment design.

关 键 词：Oxygen evolution reaction NI2P Modulating electronic structure Honeycomb-like architecture 

分 类 号：TQ426[化学工程]