Cross-double dumbbell-like Pt–Ni nanostructures with enhanced catalytic performance toward the reactions of oxygen reduction and methanol oxidation

By Wenhao Gong, Zheng Jiang, Rifeng Wu, Yang Liu, Lei Huang, N. Hu, Panagiotis Tsiakaras, P. Shen. Applied Catalysis B: Environmental, 2019

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Abstract Investigating on well-defined structure-engineering and atomic arrangement of fuel cell catalysts with high activity has attracted considerable research interest the last decade. Specially, unique nanostructures, which possess high surface-to-volume ratio and high atomic utilization have been emerged as promising candidate catalysts. Herein, we have successfully synthesized Pt–Ni cross double dumbbell-like nanostructures (Pt-Ni CDDNs) via a facile one-pot synthesis route and a kinetic control with surface capping. It is found that the as-prepared Pt–Ni alloy nanostructures exhibit an enhanced catalytic activity toward oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) in comparison with commercial Pt/C catalysts. The excellent electrooxidation property is attributed to the synergistic effect between Pt and Ni atoms, as well as high specific surface area of dumbbell-like nanostructures with multiple nanosheets. The present work provides new opportunities for the rational design of bimetallic nanomaterials with enhanced catalytic performance.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/138595a4a96a9b4bbd88a8b34d5369a6cf5c552d