Research Article


2021, 14(12): 4714–4718


Surface active-site engineering in hierarchical PtNi nanocatalysts for efficient triiodide reduction reaction

Jiabin Cui1,§, Pin Ma2,4,§, Weidan Li1, Rui Jiang1, Lirong Zheng3, Yuan Lin2, Chang Guo1 (✉), Xiong Yin1 (✉), and Leyu Wang1

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1 State Key Laboratory of Chemical Resource Engineering, Innovation Centre for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
2 Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3 Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
4 Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
§ Jiabin Cui and Pin Ma contributed equally to this work.

Keywords: surface active-site engineering, Pt skin-layer, hierarchical structure, dealloying, triiodide reduction reaction
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Hierarchical Pt-alloys enriched with active sites are highly desirable for efficient catalysis, but their syntheses generally need time-consuming and elaborate annealing treatment at high temperature. We herein report a surface active-site engineering strategy for constructing the hierarchical PtNi nanocatalysts with an atomic Pt-skin layer (PtNi@Pt-SL) towards efficient triiodide reduction reaction (TRR) via an acid-dealloying approach. The facile acid-dealloying process promotes the formation of surface Pt active sites on the hierarchical Pt-alloys, and thus results in good catalytic performance towards TRR. Theoretical calculation reveals that the enhanced catalytic property stems from the moderate energy barriers for iodide atoms on the surface Pt active-sites. The surface active-site engineering strategy paves a new way for the design of active and durable electrocatalysts.
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Surface active-site engineering in hierarchical PtNi nanocatalysts for efficient triiodide reduction reaction. Nano Res. 2021, 14(12): 4714–4718

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