Intermediate-Range Structure of Self-Assembled Cobalt-Based Oxygen-Evolving Catalyst,Journal of the American Chemical Society

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Intermediate-Range Structure of Self-Assembled Cobalt-Based Oxygen-Evolving Catalyst
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2013-04-17 , DOI: 10.1021/ja401276f
Christopher L. Farrow ₁ , D. Kwabena Bediako ₂ , Yogesh Surendranath ₂ , Daniel G. Nocera ₂ , Simon J. L. Billinge _{1,

3}

Affiliation

Continual improvements in solar-to-fuels catalysis require a genuine understanding of catalyst structure-function relationships, not only with respect to local order, but also intermediate-range structure. We report the X-ray pair distribution function analysis of the nanoscale order of an oxidic cobalt-based water-splitting catalyst and uncover an electrolyte dependence in the intermediate-range structure of catalyst films. Whereas catalyst films formed in borate electrolyte (CoB(i)) exhibit coherent domains consisting of 3-4 nm cobaltate clusters with up to three layers, films deposited in phosphate electrolyte (CoP(i)) comprise significantly smaller clusters that are not coherently stacked. These structural insights are correlated with marked differences in activity between CoP(i) and CoB(i) films.

中文翻译：

自组装钴基析氧催化剂的中段结构

太阳能到燃料催化的持续改进需要真正理解催化剂的结构-功能关系，不仅涉及局部顺序，还涉及中间结构。我们报告了氧化钴基水分解催化剂的纳米级顺序的 X 射线对分布函数分析，并揭示了催化剂膜的中程结构中的电解质依赖性。虽然在硼酸盐电解质 (CoB(i)) 中形成的催化剂膜表现出由最多三层的 3-4 nm 钴酸盐簇组成的相干域，但沉积在磷酸盐电解质 (CoP(i)) 中的膜包含显着较小的簇，这些簇不是相干堆叠的. 这些结构见解与 CoP(i) 和 CoB(i) 薄膜之间的显着差异相关。

更新日期：2013-04-17

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