Citation: Zicong Yang, Guangshun Ran, Hui Song, Yukun Chang, Jinshu Wang, Hongyi Li. Synergistic Co Pd affection impart high overall water splitting efficiency to Pt/Ir-based electrocatalyst in acid[J]. Chinese Chemical Letters, ;2026, 37(3): 111370. doi: 10.1016/j.cclet.2025.111370 shu

Synergistic Co Pd affection impart high overall water splitting efficiency to Pt/Ir-based electrocatalyst in acid

Zicong Yang ^a ,
Guangshun Ran ^{a, b} ,
Hui Song ^a ,
Yukun Chang ^a ,
Jinshu Wang ^a ,
Hongyi Li ^{a, c, *,}

a.
State Key Laboratory of Materials Low-Carbon Recycling, College of Material Science and Engineering, Beijing University of Technology, Beijing 100124, China
b.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
c.
College of Carbon Neutrality Future Technology, Beijing University of Technology, Beijing 100124, China

lhy06@bjut.edu.cn

Received Date: 19 December 2024
Revised Date: 14 May 2025
Accepted Date: 24 May 2025
Available Online: 25 May 2025

Figures(4)

To enhance the suitability of noble metal-based electrocatalysts for acidic overall water splitting, a Pt/Ir-based electrocatalyst incorporating Co and Pd anchored on Ti₃C₂T_x MXene (Ir/Co Pt Pd@MX) has been successfully synthesized. The incorporation of Co during the synthesis process increases the valence states of Ir and Pt, resulting in improved electrocatalytic performance. The Ir/Co Pt Pd@MX exhibits a low HER overpotential of 38 mV and an OER overpotential of 230 mV, outperforming commercial catalysts. The low noble metal containing electrocatalyst shows nearly 10 times the mass activity of Pt/C for HER and 35 times that of Ir/C for OER. The water splitting cell voltage is 1.46 V, with no observable decay after a 24-h stability test at 10 mA/cm², establishing it as a top-tier noble metal-based electrocatalyst in acidic environments. Density functional theory (DFT) calculations indicate that Co facilitates the deposition of Ir, enhancing OER performance, while Pd restrict H⁺absorption of Ir, ensuring the stability. The energy barrier of the rate-determining steps for both the HER and OER decreases.
- Water splitting,
- Noble metal,
- Hydrogen evolution reaction,
- Oxygen evolution reaction,
- MXene
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