pH- and Cation-Dependent Water Oxidation on Rutile RuO2(110)
pH- and Cation-Dependent Water Oxidation on Rutile RuO2(110)
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金红石 RuO2(110) 的 pH 和阳离子依赖性水氧化
DOI:
10.1021/acs.jpcc.1c00413
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Shao-Horn Yang
中科院分区:
文献类型:
--
作者:
Rao Reshma R.;Huang Botao;Katayama Yu;Hwang Jonathan;Kawaguchi Tomoya;Lunger Jaclyn R.;Peng Jiayu;Zhang Yirui;Morinaga Asuka;Zhou Hua;You Hoydoo;Shao-Horn Yang
Noncovalent interactions at electrified interfaces are key to improving activity for the oxygen evolution reaction (OER). Here, we showed that on RuO2(110) in alkaline solutions, OER activity is cation-dependent, being largest in 0.1 M KOH compared to LiOH and NaOH. Using crystal truncation rod analysis, −O is detected on the coordinatively unsaturated site at 1.5 VRHEin 0.1 M KOH, suggesting that the rate-determining step is −O + OH–→ -OOH + e–, which is different from that in acid involving the final deprotonation of −OOH. The ordering of interfacial water in base was found to decrease with increasing potential and independent of cations. Using surface-enhanced infrared spectroscopy, the density of isolated water molecules (zero H-bonds) was found to increase, and the density of icelike water molecules (four H-bonds) decreases from Li+to K+at OER potentials. The higher activity of more isolated interfacial OH–ions in the case of K+and the lesser stabilization of −O intermediates by hydration water of K+compared to Na+and Li+can result in higher OER activity for KOH. This work provides molecular details of the interface as a function of potential and electrolyte and enables the design of more active electrochemical interfaces.
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影响因子:
3.9
作者:
M. Tomkiewicz;Y. Huang;F. Pollak
通讯作者:
F. Pollak
DOI:
10.1107/s1600576718004326
发表时间:
2017
期刊:
--
影响因子:
--
作者:
T. Kawaguchi;Yihua Liu;A. Reiter;Christian M. Cammarota;M. Pierce;H. You
通讯作者:
H. You
影响因子:
4.5
作者:
Kawaguchi Tomoya;Rao Reshma R.;Lunger Jaclyn R.;Liu Yihua;Walko Donald;Karapetrova Evguenia A.;Komanicky Vladimir;Shao-Horn Yang;You Hoydoo
通讯作者:
You Hoydoo
影响因子:
18.3
作者:
Fayer, Michael D.
通讯作者:
Fayer, Michael D.
影响因子:
4.5
作者:
T. Lister;Y. Chu;W. Cullen;H. You;R. Yonco;J. Mitchell;Z. Nagy
通讯作者:
Z. Nagy