Precise synthetic control of exclusive ligand effect boosts oxygen reduction catalysis

Lu Tao, Kai Wang, Fan Lv, Hongtian Mi, Fangxu Lin, Heng Luo, Hongyu Guo, Qinghua Zhang, Lin Gu, Mingchuan Luo and Shaojun Guo ()
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Lu Tao: Peking University
Kai Wang: Peking University
Fan Lv: Peking University
Hongtian Mi: University of Science and Technology Beijing
Fangxu Lin: Peking University
Heng Luo: Peking University
Hongyu Guo: Peking University
Qinghua Zhang: Chinese Academy of Sciences
Lin Gu: Chinese Academy of Sciences
Mingchuan Luo: Peking University
Shaojun Guo: Peking University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Ligand effect, induced by charge transfer between catalytic surface and substrate in core/shell structure, was widely proved to benefit Pt-catalyzed oxygen reduction reaction by tuning the position of d-band center of Pt theoretically. However, ligand effect is always convoluted by strain effect in real core/shell nanostructure; therefore, it remains experimentally unknown whether and how much the ligand effect solely contributes electrocatalytic activity improvements. Herein, we report precise synthesis of a kind of Pd3Ru1/Pt core/shell nanoplates with exclusive ligand effect for oxygen reduction reaction. Layer-by-layer growth of Pt overlayers onto Pd3Ru1 nanoplates can guarantee no lattice mismatch between core and shell because the well-designed Pd3Ru1 has the same lattice parameters as Pt. Electron transfer, due to the exclusive ligand effect, from Pd3Ru1 to Pt leads to a downshift of d-band center of Pt. The optimal Pd3Ru1/Pt1-2L nanoplates achieve excellent activity and stability for oxygen reduction reaction in alkaline/acid electrolyte.

Date: 2023
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DOI: 10.1038/s41467-023-42514-w

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