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Updated: May 20, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
Simple "Directional Trimming" Strategy Engineered Platinum Atomic Clusters with Controllable Coordination Numbers for
Fengkun Hao1,2, Jing Zhong3, Fengqian Hao3
1Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing, 100083, China.
Abstract:
The coordination number (CN) in atomic cluster (AC) catalysts endows their catalytic performance with flexible tunability. However, the quantitative relationship between the CN and catalytic activity of atomic cluster catalysts remains ambiguity. Herein, inspired by the gardeners trimming plants branches to obtain ornamental value shape, we propose a "directional trimming" strategy to obtain a series of AC catalysts with wide range of Cl CN and establish an inverted volcano curve to explain the effect of CN on hydrogen evolution reaction (HER). Moreover, Pt/CB-90 (moderate Cl CN of 3.7) exhibits the lowest overpotential of 22.94 mV at 10 mA cm-2 and outstanding mass activity (25 times to commercial Pt/C). This proposed synthesis strategy fully utilizes the precursor atoms and is widely applicable. The reaction liquid can be reused up to 20 times to obtain 1130 mg catalysts without introducing any other chemicals. Additionally, theoretical calculations highlight the appropriate Cl CN benefits the HER on Pt2 ACs. This fundamental understanding of the role of CN in catalytic activity offers valuable guidance to promote performance in various catalytic reactions.
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