Effect of Capping Agent on the Shape and Catalytic Activity of PtPd Bimetallic Alloy Nanostructures

Abstract:

In this work, PtPd nanostructures have been synthesized via the chemical reduction method with different capping agents (i.e., PVA, PVP, and PEG), whilst the strong reducing agent, NaBH₄, was used in this study to reduce the metal salt to zero-valent PtPd nanostructures. Both PtPd synthesized with PVP and PEG exhibit nanoparticle structures, whereas PtPd synthesized in PVA demonstrates large, interconnected network structures. Pt-Pd synthesized with PVP exhibits a high ECSA value of 692.68 m²/g compared to without capping agent (287.80 m²/g) indicating large active sites, which increases its catalytic function. This study concludes that the presence of a capping agent influences the morphological structure and the catalyst's efficiency in performing a redox reaction at the surface.

• Periodical: Journal of Metastable and Nanocrystalline Materials (Volume 36)
• Pages: 57-62
• DOI: https://doi.org/10.4028/p-6t2hg0
• Online since: May 2023
• Authors: Mahayatun Dayana Johan Ooi*, Nurshahzleen Mohd Yusaini, Ainorkhilah Mahmood, Noorezal Atfyinna Mohammed Napiah, Yushamdan Yusof
• Keywords: Capping Agent, Catalyst, DMFCs, Nanosponges, PtPd

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