Revised Oxygen Evolution Reaction Activity Trends for First-Row Transition-Metal (Oxy)hydroxides in Alkaline Media,The Journal of Physical Chemistry Letters

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Revised Oxygen Evolution Reaction Activity Trends for First-Row Transition-Metal (Oxy)hydroxides in Alkaline Media
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2015-09-08 00:00:00 , DOI: 10.1021/acs.jpclett.5b01650
Michaela S. Burke ₁ , Shihui Zou _{1,

2} , Lisa J. Enman ₁ , Jaclyn E. Kellon ₁ , Christian A. Gabor ₁ , Erica Pledger ₁ , Shannon W. Boettcher ₁

Affiliation

First-row transition-metal oxides and (oxy)hydroxides catalyze the oxygen evolution reaction (OER) in alkaline media. Understanding the intrinsic catalytic activity provides insight into improved catalyst design. Experimental and computationally predicted activity trends, however, have varied substantially. Here we describe a new OER activity trend for nominally oxyhydroxide thin films of Ni(Fe)O_xH_y > Co(Fe)O_xH_y > FeO_xH_y-AuO_x > FeO_xH_y > CoO_xH_y > NiO_xH_y > MnO_xH_y. This intrinsic trend has been previously obscured by electrolyte impurities, potential-dependent electrical conductivity, and difficulty in correcting for surface-area or mass-loading differences. A quartz-crystal microbalance was used to monitor mass in situ and X-ray photoelectron spectroscopy to measure composition and impurity levels. These new results provide a basis for comparison to theory and help guide the design of improved catalyst systems.

中文翻译：

碱性介质中首行过渡金属氢氧化物的经修订的氧气析出反应活性趋势

第一行过渡金属氧化物和（氧）氢氧化物催化碱性介质中的氧释放反应（OER）。了解固有的催化活性可提供对改进催化剂设计的了解。但是，实验和计算预测的活动趋势已经发生了很大变化。在这里，我们描述了Ni（Fe）O _x H _y > Co（Fe）O _x H _y > FeO _x H _y -AuO _x > FeO _x H _y > CoO _x H _y >的标称羟基氧化物薄膜的新OER活性趋势。NiO _x H _y > MnO _x H _y。电解质杂质，与电势有关的电导率以及难以校正表面积或质量负载差异的问题先前已掩盖了这种内在趋势。使用石英晶体微量天平监测原位质量，并使用X射线光电子能谱法测量成分和杂质水平。这些新结果为与理论进行比较提供了基础，并有助于指导改进催化剂体系的设计。

更新日期：2015-09-08

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