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DOI	10.1039/c8ee03134g
	CO2 reduction on gas-diffusion electrodes and why catalytic performance must be assessed at commercially-relevant conditions
	Burdyny T.; Smith W.A.
发表日期	2019
ISSN	1754-5692
起始页码	1442
结束页码	1453
卷号	12 期号:5
英文摘要	Electrocatalytic CO2 reduction has the dual-promise of neutralizing carbon emissions in the near future, while providing a long-term pathway to create energy-dense chemicals and fuels from atmospheric CO2. The field has advanced immensely in recent years, taking significant strides towards commercial realization. Catalyst innovations have played a pivotal role in these advances, with a steady stream of new catalysts providing gains in CO2 conversion efficiencies and selectivities of both C1 and C2 products. Comparatively few of these catalysts have been tested at commercially-relevant current densities (∼200 mA cm-2) due to transport limitations in traditional testing configurations and a research focus on fundamental catalyst kinetics, which are measured at substantially lower current densities. A catalyst's selectivity and activity, however, have been shown to be highly sensitive to the local reaction environment, which changes drastically as a function of reaction rate. As a consequence of this, the surface properties of many CO2 reduction catalysts risk being optimized for the wrong operating conditions. The goal of this perspective is to communicate the substantial impact of reaction rate on catalytic behaviour and the operation of gas-diffusion layers for the CO2 reduction reaction. In brief, this work motivates high current density catalyst testing as a necessary step to properly evaluate materials for electrochemical CO2 reduction, and to accelerate the technology toward its envisioned application of neutralizing CO2 emissions on a global scale. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Carbon dioxide; Catalyst activity; Current density; Diffusion in gases; Reaction rates; Reduction; Catalytic behaviour; Catalytic performance; Gas diffusion electrodes; Gas diffusion layers; High current densities; Operating condition; Testing configurations; Transport limitations; Catalyst selectivity; carbon dioxide; carbon emission; catalysis; catalyst; diffusion; electrode; electrokinesis; performance assessment; reaction rate
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162389
作者单位	Materials for Energy Conversion and Storage, Department of Chemical Engineering, Delft University of Technology, Delft, 2629 HZ, Netherlands
推荐引用方式 GB/T 7714	Burdyny T.,Smith W.A.. CO2 reduction on gas-diffusion electrodes and why catalytic performance must be assessed at commercially-relevant conditions[J],2019,12(5).
APA	Burdyny T.,&Smith W.A..(2019).CO2 reduction on gas-diffusion electrodes and why catalytic performance must be assessed at commercially-relevant conditions.Energy and Environmental Science,12(5).
MLA	Burdyny T.,et al."CO2 reduction on gas-diffusion electrodes and why catalytic performance must be assessed at commercially-relevant conditions".Energy and Environmental Science 12.5(2019).