假电容
氧化还原
析氧
催化作用
金红石
钌
氧气
化学
无机化学
材料科学
电极
电化学
物理化学
生物化学
有机化学
超级电容器
作者
Kelsey A. Stoerzinger,Reshma R. Rao,Xiao Renshaw Wang,Wonbin Hong,Christopher M. Rouleau,Yang Shao‐Horn
出处
期刊:Chem
[Elsevier]
日期:2017-05-01
卷期号:2 (5): 668-675
被引量:152
标识
DOI:10.1016/j.chempr.2017.04.001
摘要
Rutile RuO2 is known to exhibit high catalytic activity for the oxygen evolution reaction (OER) and large pseudocapacitance associated with redox of surface Ru; however, the mechanistic link between these properties and the role of pH is yet to be understood. Here, we report that the OER activities of the (101), (001), and (111) RuO2 surfaces increased, whereas the potential of a pseudocapacitive feature just before OER shifted to lower potentials (“super-Nernstian” shift) as pH increased on the reversible hydrogen electrode scale. This behavior contrasts with that of the (100) and (110) surfaces, which showed pH-independent Ru redox and OER activity. The link between catalytic and pseudocapacitive behavior illustrates the importance of this redox feature in generating active sites, thus building new mechanistic understanding of the OER.
科研通智能强力驱动
Strongly Powered by AbleSci AI