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High Throughput Synthesis and Screening of Oxygen Reduction Catalysts in the MTiO3 (M = Ca, Sr, Ba) Perovskite Phase Diagram
ACS Combinatorial Science ( IF 3.903 ) Pub Date : 2020-11-05 , DOI: 10.1021/acscombsci.0c00094
Alexandra R Groves 1 , Thomas E Ashton 1 , Jawwad A Darr 1
Affiliation  

A library of 66 perovskite BaxSryCazTiO3 (x + y + z = 1) samples (ca. three grams per sample) was made in ca. 14 h using a high-throughput continuous hydrothermal flow synthesis system. The as-synthesized samples were collected from the outlet of the process and then cleaned and freeze-dried before being evaluated individually as oxygen reduction catalysts using a rotating disk electrode testing technique. To establish any correlations between physical and electrochemical characterization data, the as-synthesized samples were investigated using analytical methods including BET surface area, powder X-ray diffraction (PXRD) and in selected cases, transmission electron microscopy (TEM). The aforementioned approach was validated as being able to quickly identify oxygen reduction catalysts from new libraries of electrocatalysts.

中文翻译:

MTiO3(M = Ca、Sr、Ba)钙钛矿相图中氧还原催化剂的高通量合成与筛选

66 个钙钛矿 Ba x Sr y Ca z TiO 3 ( x + y + z= 1) 样品(每个样品约 3 克)在约 14 小时使用高通量连续水热流合成系统。从工艺出口收集合成样品,然后清洗和冷冻干燥,然后使用旋转盘电极测试技术单独评估作为氧还原催化剂。为了建立物理和电化学表征数据之间的任何相关性,使用分析方法研究合成样品,包括 BET 表面积、粉末 X 射线衍射 (PXRD) 和在选定的情况下,透射电子显微镜 (TEM)。上述方法被证实能够从新的电催化剂库中快速识别氧还原催化剂。
更新日期:2020-12-14
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