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Journal Article

Amorphization Activated Multimetallic Pd Alloys for Boosting Oxygen Reduction Catalysis

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Hu,  Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Yu, Z., Chen, Y., Xia, J., Yao, Q., Hu, Z., Huang, W.-H., et al. (2024). Amorphization Activated Multimetallic Pd Alloys for Boosting Oxygen Reduction Catalysis. Nano Letters, 24(4), 1205-1213. doi:10.1021/acs.nanolett.3c04045.


Cite as: https://hdl.handle.net/21.11116/0000-000E-A4A3-0
Abstract
Amorphous nanomaterials have drawn extensive attention owing to their unique features, while amorphization on noble metal nanomaterials still remains formidably challenging. Herein, we demonstrate a universal strategy to synthesize amorphous Pd-based nanomaterials from unary to quinary metals through the introduction of phosphorus (P). The amorphous Pd-based nanoparticles (NPs) exhibit generally promoted oxygen reduction reaction (ORR) activity and durability compared with their crystalline counterparts. Significantly, the quinary P-PdCuNiInSn NPs, benefiting from the amorphous structure and multimetallic component effect, exhibit mass activities as high as 1.04 A mgPd-1 and negligible activity decays of 1.8% among the stability tests, which are much better than values for original Pd NPs (0.134 A mgPd-1 and 28.4%). Experimental and theoretical analyses collectively reveal that the synergy of P-induced amorphization and the expansion of metallic components can considerably lower the free energy changes in the rate-determined step, thereby explaining the positive correlation with the catalytic activity. © 2024 American Chemical Society.