Surface iodine and pyrenyl-graphdiyne co-modified Bi catalysts for highly efficient CO2 electroreduction in acidic electrolyte

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：CO2 electroreduction to formic acid/formate would contribute to alleviating the energy and climate crisis.This work reports a Bi-based catalyst derived from the in-situ electroreduction of Bi2O2CO3 modified with iodine and pyrenyl-graphdiyne(PGDY)on the surface for efficient electroreduction of CO2 in acidic electrolyte,with a high partial current density of 98.71 mA·cm-2 and high Faradaic efficiency(FE)＞90％over the potential range from-1.2 to-1.5 V vs.reversible hydrogen electrode(RHE),as well as the long-term operational stability over 240 h without degradation in H-type cell.Experimental results and density function theory calculations show that the synergistic effect of surface iodine and PGDY is responsible for this active and extremely stable process of CO2 electroreduction via lowering the energy barriers for formation of*OCHO intermediate,suppressing the competitive HER by enhancing the concentration of both K+and CO2 at reaction interface,as well as preventing the dissolution and re-deposition of active Bi atoms on surface during catalytic reaction.This work provides new insight into designing highly active and stable electrocatalysts for CO2 reduction.

外文关键词：

CO2 reductionelectrocatalysisBi-based catalystsacidic electrolyte

作者：

Min Zhang、Juan Wang、Xin Rong、Xiu-Li Lu、Tong-Bu Lu

展开 >

作者单位：

MOE International Joint Laboratory of Materials Microstructure,Institute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China

基金：

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China111 Project of ChinaTianjin Research Innovation Project for Postgraduate Students

项目编号：

2017YFA0700104217900522180520721931007D170032021YJSB254

出版年：

2024

DOI：

10.1007/s12274-023-6073-4

纳米研究(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.17(4)

参考文献量56