图层(电子)
材料科学
电解
阳极
化学工程
双功能
电催化剂
电化学
电解质
催化作用
原子层沉积
阴极
析氧
光伏系统
纳米技术
电极
化学
工程类
生物化学
生物
物理化学
生态学
作者
M. M. Schreier,Florent Héroguel,Ludmilla Steier,Shahzada Ahmad,Jeremy S. Luterbacher,Matthew T. Mayer,Jingshan Luo,Michaël Grätzel
出处
期刊:Nature Energy
[Springer Nature]
日期:2017-06-05
卷期号:2 (7)
被引量:440
标识
DOI:10.1038/nenergy.2017.87
摘要
The solar-driven electrochemical reduction of CO2 to fuels and chemicals provides a promising way for closing the anthropogenic carbon cycle. However, the lack of selective and Earth-abundant catalysts able to achieve the desired transformation reactions in an aqueous matrix presents a substantial impediment as of today. Here we introduce atomic layer deposition of SnO2 on CuO nanowires as a means for changing the wide product distribution of CuO-derived CO2 reduction electrocatalysts to yield predominantly CO. The activity of this catalyst towards oxygen evolution enables us to use it both as the cathode and anode for complete CO2 electrolysis. In the resulting device, the electrodes are separated by a bipolar membrane, allowing each half-reaction to run in its optimal electrolyte environment. Using a GaInP/GaInAs/Ge photovoltaic we achieve the solar-driven splitting of CO2 into CO and oxygen with a bifunctional, sustainable and all Earth-abundant system at an efficiency of 13.4%. Electrochemical reduction of CO2 to CO is a route to synthesize fuels, but cheaper and more selective catalysts are required. Using a cell equipped with a bipolar membrane and the same Earth-abundant electrocatalyst at each electrode, Schreier et al. selectively produce CO, powered by a triple-junction photovoltaic.
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