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Improving the efficiency and stability of Pt-based catalysts for the ethylamine electro-oxidation reaction remains a critical challenge for advancing hydrogen storage and regenerative fuel cells. Here, we report a hierarchical dual-metal engineering strategy to simultaneously tailor the electronic structure and geometric configuration of Pt active sites, enhancing both catalytic activity and stability. Specifically, we synthesized a carbon-supported Pt 3 Ni 1 alloy with its surface decorated with Au (Pt 3 Ni 1 -Au/C). X-ray photoelectron spectroscopy reveals electron transfer from Ni to Pt, resulting in a downshifted Pt d-band center and weakened intermediate adsorption. In situ attenuated total reflection infrared spectroscopy shows that Au decoration disrupts continuous Pt ensembles, reducing intermediate accumulation and mitigating surface poisoning. Benefiting from these effects, the Pt 3 Ni 1 -Au catalyst exhibits significantly improved activity and long-term stability compared to unmodified Pt. This work offers a rational design strategy for constructing structurally and electronically optimized Pt-based catalysts, with implications for efficient hydrogen storage and electrochemical energy conversion.
Zhu et al. (Wed,) studied this question.
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