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PdNi/N-C dodecahedra with surface-enriched Pd for efficient methanol electro-oxidation in alkaline media
Yumeng Wang1, Kaiyuan Wang1, Yiqun Fang1
1Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, 26 Hexing Road, Harbin 150040, PR China. yqfang@nefu.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|July 31, 2026
Summary
A novel palladium-nickel on nitrogen-doped carbon (PdNi/N-C) catalyst, derived from ZIF-8, significantly enhances methanol electrooxidation in fuel cells. This advanced catalyst overcomes CO poisoning and improves durability, offering a cost-effective solution.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- Methanol electrooxidation reaction (MOR) is crucial for direct methanol fuel cells.
- Challenges include catalyst cost, CO poisoning, and poor durability.
- Noble metal catalysts like palladium are expensive and limited.
Purpose of the Study:
- To develop a high-performance, cost-effective catalyst for MOR.
- To address CO poisoning and enhance catalyst stability.
- To investigate the role of support morphology and surface enrichment.
Main Methods:
- Synthesized a PdNi/N-C catalyst using ZIF-8 derived dodecahedra.
- Utilized a nitrogen-doped carbon support with Pd-enriched surfaces.
- Investigated PdNi alloying and excess Ni nanoparticles for bifunctional mechanism.
Main Results:
- Achieved a mass activity of 6.20 A mg-1Pd for MOR, 6.75 times higher than commercial Pd/C.
- Demonstrated significantly improved stability during accelerated durability tests.
- Mitigated CO poisoning and enhanced reaction kinetics effectively.
Conclusions:
- The ZIF-8 derived PdNi/N-C catalyst offers superior performance for MOR.
- Support morphology and Pd surface enrichment are key for bimetallic catalyst design.
- This strategy provides a promising route for advanced anode catalysts in fuel cells.
