Citation: Qing Li, Bing Wang, Qi Xu, Ruiyou Liu, Chen Li, Fang Luo, Yifei Li, Yingjie Yu, Zehui Yang. Pt dopants in ruthenium/iridium oxides promote catalytic activity in overall acidic water splitting[J]. Chinese Chemical Letters, ;2025, 36(12): 111658. doi: 10.1016/j.cclet.2025.111658 shu

Pt dopants in ruthenium/iridium oxides promote catalytic activity in overall acidic water splitting

Qing Li ^{a, b, 1} ,
Bing Wang ^{c, 1} ,
Qi Xu ^a ,
Ruiyou Liu ^a ,
Chen Li ^{a, *,} ,
Fang Luo ^{a, *,} ,
Yifei Li ^d ,
Yingjie Yu ^a ,
Zehui Yang ^{b, *,}

a.
State Key Laboratory for Hubei New Textile Materials and Advanced Processing Technology, School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, China
b.
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
c.
Technological Institute of Materials & Energy Science (TIMES), Key Laboratory of Liquid Crystal Polymers based Flexible Display Technology in National Petroleum and Chemical Industry, Xijing University, Xi'an 710123, China
d.
School of Engineering, Huzhou University, Huzhou 313000, China

cli@wtu.edu.cn

luofang04@gmail.com

yeungzehui@gmail.com

Received Date: 17 June 2025
Revised Date: 19 July 2025
Accepted Date: 30 July 2025
Available Online: 5 August 2025

Figures(5)

The commercialization of polymer electrolyte membrane water splitting technology significantly depends on the oxygen/hydrogen evolution reaction (OER/HER) electrocatalysts; customarily catalyzed by platinum (Pt) and ruthenium/iridium oxides (RuO₂/IrO₂). In this work, we have devised a novel strategy to improve the catalytic activities towards OER and HER catalysis via the decoration of RuO₂ with Pt. Pt dopants in ruthenium oxides (Pt-RuO₂) create more oxygen vacancies inducing a weaker interaction between active site and oxygen reaction intermediates, evidenced by downshifted d band center and increment in e_g orbital filling of Ru atom; thereby, the acidic OER performance of Pt-RuO₂ is enhanced by 3.5-fold than commercial RuO₂ by mean of turnover frequency at 1.6 V vs. RHE. Moreover, Pt-RuO₂ exhibits a similar HER performance to commercial Pt/C. The potential for overall water splitting is decreased by 0.18 V at 100 mA/cm²; besides, an excellent stability is also recorded after the incorporation of Pt dopants. The Δε_d-p value of Pt-RuO₂ was 1.76 eV, which is lower than the counterpart of RuO₂, suggesting easy electron transition between d and p orbitals, suppressing the over-oxidation of RuO₂; thereby, a higher stability is achieved for Pt-RuO₂. The invitation of Pt dopants to boost catalytic activity and stability has also been extended to IrO₂.
- Acidic water splitting,
- Oxygen evolution reaction,
- Hydrogen evolution reaction,
- Ruthenium oxides,
- Dopants
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