首页|Confinement of ionomer for electrocatalytic CO2 reduction reaction via efficient mass transfer pathways

Confinement of ionomer for electrocatalytic CO2 reduction reaction via efficient mass transfer pathways

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Gas diffusion electrodes(GDEs)mediate the transport of reactants,products and electrons for the electrocatalytic CO2 reduction reaction(CO2RR)in membrane electrode assemblies.The random distribution of ionomer,added by the traditional physical mixing method,in the catalyst layer of GDEs affects the transport of ions and CO2.Such a phenomenon results in elevated cell voltage and decaying selectivity at high current densities.This paper describes a pre-confinement method to construct GDEs with homogeneously distributed ionomer,which enhances mass transfer locally at the active centers.The optimized GDE exhibited comparatively low cell voltages and high CO Faradaic efficiencies(FE＞90％)at a wide range of current densities.It can also operate stably for over 220 h with the cell voltage staying almost unchanged.This good performance can be preserved even with diluted CO2 feeds,which is essential for pursuing a high single-pass conversion rate.This study provides a new approach to building efficient mass transfer pathways for ions and reactants in GDEs to promote the electrocatalytic CO2RR for practical applications.

CO2 electroreductiongas diffusion electrodemass transferionomerAg catalyst

Xiaowei Du、Peng Zhang、Gong Zhang、Hui Gao、Lili Zhang、Mengmeng Zhang、Tuo Wang、Jinlong Gong

展开 >

School of Chemical Engineering and Technology,Key Laboratory for Green Chemical Technology of the Ministry of Education,Tianjin University,Tianjin 300072,China

Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China

National Industry-Education Platform of Energy Storage,Tianjin University,Tianjin 300350,China

Joint School of the National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou 350207,China

Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China

展开 >

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHaihe Laboratory of Sustainable Chemical TransformationsProgram of Introducing Talents ofDiscipline to UniversitiesXplorer Prize

2021YFA150150322121004220380092225000822108197CYZC202107BP0618007

2024

10.1093/nsr/nwad149

国家科学评论(英文版)

国家科学评论(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.11(2)
  • 53