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Cho, Jaephil
Nano Energy Storage Material Lab.
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Boosting Hydrogen Evolution Reaction by Phase Engineering and Phosphorus Doping on Ru/P-TiO2

Author(s)
Zhou, ShizhengJang, HaeseongQin, QingHou, LiqiangKim, Min GyuLiu, ShangguoLiu, XienCho, Jaephil
Issued Date
2022-11
DOI
10.1002/anie.202212196
URI
https://scholarworks.unist.ac.kr/handle/201301/60114
Citation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.61, no.47
Abstract
Synergistic optimization of the elementary steps of water dissociation and hydrogen desorption for the hydrogen evolution reaction (HER) in alkaline media is a challenge. Herein, the Ru cluster anchored on a trace P-doped defective TiO2 substrate (Ru/P-TiO2) was synthesized as an electrocatalyst for the HER; it exhibited a commercial Pt/C-like geometric activity and an excellent mass activity of 9984.3 mA mg(Ru)(-1) at -0.05 V vs. RHE, which is 34.3 and 18.7 times higher than that of Pt/C and Ru/TiO2, respectively. Experimental and theoretical studies indicated that using a rutile-TiO2-crystal-phase substrate enhanced the HER activity more than the anatase phase. Rich surface oxygen vacancies on rutile-TiO2 facilitated the adsorption and dissociation of water, while the partial substitution of Ti4+ with P5+ enhanced H-2 generation by facilitating hydrogen spillover from the Ru site to the surface P site, synergistically enhancing the HER activity.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
1433-7851
Keyword (Author)
ElectrocatalystHydrogen Evolution ReactionHydrogen SpilloverOxygen VacancySupport-Structure Engineering
Keyword
P-DOPED TIO2OXYGEN VACANCYWATERADSORPTIONCATALYSTGROWTH

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