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Electrochemical CO2 Reduction Over Bimetallic Au–Sn Thin Films: Comparing Activity and Selectivity against Morphological, Compositional, and Electronic Differences
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-06-08 , DOI: 10.1021/acs.jpcc.0c01894 Sanjana Chandrashekar 1 , Nathan T. Nesbitt 1 , Wilson A. Smith 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-06-08 , DOI: 10.1021/acs.jpcc.0c01894 Sanjana Chandrashekar 1 , Nathan T. Nesbitt 1 , Wilson A. Smith 1
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Carbon dioxide can be electrochemically converted into feedstocks for many industrial processes, such as the manufacturing of synthetic fuels and chemicals. This work focuses on the structure–functionality relationship between Au, Sn, and bimetallic AuSn catalysts and their CO2 reduction performance in an H-Cell at varying current densities. X-Ray diffraction (XRD), X-ray photoemission spectroscopy (XPS), and atomic force microscopy (AFM) were used to determine the crystal structure, surface morphology, and composition of compositionally variant bimetallic thin films of Au–Sn before and after electrolysis. The electrochemical activity for each bimetallic film was measured in terms of electrode current and product selectivity as a function of applied current density and catalyst composition. The results of this work show that not all combinations of metals for CO2 reduction can improve catalyst activity toward a desired product and that a detailed material characterization can help in drawing structure–functionality relationships between a catalyst and its activity.
中文翻译：
双金属Au-Sn薄膜上的电化学CO 2还原：比较活性和对形态，组成和电子差异的选择性
二氧化碳可以被电化学转化为许多工业过程的原料，例如合成燃料和化学物质的生产。这项工作的重点是金，锡和双金属金锡催化剂与它们的CO 2之间的结构-功能关系。H-Cell在不同电流密度下的降低性能。X射线衍射（XRD），X射线光发射光谱（XPS）和原子力显微镜（AFM）用于确定前后Au-Sn组成变体双金属薄膜的晶体结构，表面形态和组成电解。根据电极电流和产物选择性作为施加的电流密度和催化剂组成的函数，测量每种双金属膜的电化学活性。这项工作的结果表明，并不是所有用于还原CO 2的金属组合都能提高催化剂对所需产品的活性，并且详细的材料表征可以帮助绘制催化剂与其活性之间的结构-功能关系。
更新日期：2020-07-09
中文翻译：
双金属Au-Sn薄膜上的电化学CO 2还原：比较活性和对形态，组成和电子差异的选择性
二氧化碳可以被电化学转化为许多工业过程的原料，例如合成燃料和化学物质的生产。这项工作的重点是金，锡和双金属金锡催化剂与它们的CO 2之间的结构-功能关系。H-Cell在不同电流密度下的降低性能。X射线衍射（XRD），X射线光发射光谱（XPS）和原子力显微镜（AFM）用于确定前后Au-Sn组成变体双金属薄膜的晶体结构，表面形态和组成电解。根据电极电流和产物选择性作为施加的电流密度和催化剂组成的函数，测量每种双金属膜的电化学活性。这项工作的结果表明，并不是所有用于还原CO 2的金属组合都能提高催化剂对所需产品的活性，并且详细的材料表征可以帮助绘制催化剂与其活性之间的结构-功能关系。
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