Ordering Degree Regulation of Pt₂NiCo Intermetallics for Efficient Oxygen Reduction Reaction

Authors

Chen-Hao Zhang, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China; China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology
Han-Yu Hua, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
Jun-Hao Yang, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
Qian Zhang, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
Chang Yang, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
De-Li Wang, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China; China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, Hubei, ChinaFollow

Corresponding Author

De-Li Wang (wangdl81125@hust.edu.cn)

Abstract

Alloying transition metals with Pt is an effective strategy for optimizing Pt-based catalysts toward the oxygen reduction reaction (ORR). Atomic ordered intermetallic compounds (IMC) provide unique electronic and geometrical effects as well as stronger intermetallic interactions due to the ordered arrangement of metal atoms, thus exhibiting superior electrocatalytic activity and durability. However, quantitatively analyzing the ordering degree of IMC and exploring the correlation between the ordering degree and ORR activity remains extremely challenging. Herein, a series of ternary Pt₂NiCo intermetallic catalysts (o-Pt₂NiCo) with different ordering degree were synthesized by annealing temperature modulation. Among them, the o-Pt₂NiCo which annealed at 800 °C for two hours exhibits the highest ordering degree and the optimal ORR activity, which the mass activity of o-Pt₂NiCo is 1.8 times and 2.8 times higher than that of disordered Pt2NiCo alloy and Pt/C. Furthermore, the o-Pt₂NiCo still maintains 70.8% mass activity after 30,000 potential cycles. Additionally, the ORR activity test results for Pt₂NiCo IMC with different ordering degree also provide a positive correlation between the ordering degree and ORR activity. This work provides a prospective design direction for ternary Pt-based electrocatalysts.

Graphical Abstract

Keywords

Fuel cell, Oxygen reduction reaction, Electrocatalysis, Intermetallic compound, Ordering degree

DOI Link

https://doi.org/10.61558/2993-074X.3519

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2025-04-28

Online Available Date

2025-01-09

Revised Date

2024-12-29

Received Date

2024-11-26

Recommended Citation

Chen-Hao Zhang, Han-Yu Hua, Jun-Hao Yang, Qian Zhang, Chang Yang, De-Li Wang. Ordering Degree Regulation of Pt₂NiCo Intermetallics for Efficient Oxygen Reduction Reaction[J]. Journal of Electrochemistry, 2025 , 31(4): 2411281.
DOI: 10.61558/2993-074X.3519
Available at: https://jelectrochem.xmu.edu.cn/journal/vol31/iss4/2