期刊
ACS ENERGY LETTERS
卷 6, 期 10, 页码 3600-3606出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.1c01513
关键词
-
类别
资金
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- Laboratory Directed Research and Development [19-SI-005]
- Lawrence Livermore National Laboratory, Stanford University
- TOTALEnergies American Services, Inc. [TC02307]
This study developed a resolved, pore-scale model for the electrochemical reduction of CO2 within a liquid-filled catalyst layer, identifying three CO2 mass transport regimes and validating the assumption of pore-scale uniformity implicit in popular, volume-averaged GDE models. The CO2 conversion efficiency strongly depends on the governing mass transport regime, with operational-phase diagrams constructed to guide catalyst layer design.
Gas diffusion electrodes (GDEs) have shown promising performance for the electrochemical reduction of CO2 (CO2R). In this study, a resolved, pore scale model of electrochemical reduction of CO2 within a liquid-filled catalyst layer is developed. Three CO2 mass transport regimes are identified in which the CO2 penetration depth is controlled by CO(2 )consumption in the electrolyte, CO2 conversion along the solid-electrolyte double-phase boundaries (DPBs), and CO2 conversion concentrated around the gas-solid-electrolyte triple-phase boundaries (TPBs). While it is possible for CO2R to be localized around the TPBs, in systems with submicron pore radii operating at <1 A cm(-2) CO2R will be distributed across the DPBs within the catalyst layer. This validates the assumption of pore-scale uniformity implicit in popular, volume-averaged GDE models. The CO2 conversion efficiency depends strongly on the governing mass transport regime, and operational-phase diagrams are constructed to guide the catalyst layer design.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据