Undercoordinated Two-Dimensional Pt Nanoring Stabilized by a Ring-on-Sheet Nanoheterostructure for Highly Efficient Alkaline Hydrogen Evolution Reaction

Chen Ma (Co-first Author), Weiwei Chen (Co-first Author), Yanjie Wu (Co-first Author), Wenbin Wang (Co-first Author), Lei Xu, Changsheng Chen, Long Zheng, Gang Wang, Peng Han, Ping Gu, Xiao Wang, Ye Zhu, Zhiyuan Zeng, Hongyan He, Qiyuan He*, Zhihai Ke*, Dong Su*, Ye Chen*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

2 Citations (Scopus)

Abstract

Platinum (Pt) is a state-of-the-art electrocatalyst for green hydrogen production in alkaline electrolytes. The delicate design and fabrication of two-dimensional (2D) Pt nanocatalysts can significantly enhance atomic utilization efficiency, while further improving intrinsic catalytic performance by modulating the density of surface active sites. However, the high surface energy and morphology complexity of 2D nanostructures often result in poor structural stability under the working conditions. Here, we report the synthesis of a 2D ring-on-sheet nanoheterostructure featuring abundant low-coordination Pt sites in which a defect-rich Pt nanoring is stabilized by an ultrathin 2D rhodium (Rh) support. The Rh@Pt nanoring exhibits remarkably enhanced activity and stability in an electrocatalytic hydrogen evolution reaction in alkaline media compared to defect-free Rh@Pt core-shell nanoplates and commercial Pt/C. This work provides new insights for the design and synthesis of 2D nanoheterostructures with abundant surface active sites for efficient and durable electrocatalysis. © 2025 American Chemical Society.
Original languageEnglish
Pages (from-to)3212-3220
JournalNano Letters
Volume25
Issue number8
Online published12 Feb 2025
DOIs
Publication statusPublished - 26 Feb 2025

Funding

Y.C. acknowledges the funding support from NSFC Young Scientists Fund (Project No. 22305203) and the support by the Alliance of National and International Science Organizations for the Belt and Road Regions (Grant No. ANSO-CR-KP-2022-12). D.S. acknowledges the support from the National Natural Science Foundation of China (No. U21A20328). Y.C. and Z.Z. acknowledge the Young Collaborative Research Grant (Project No. C1003-23Y) support from the Research Grants Council of the Hong Kong SAR. Y.C. also acknowledges the support from Start-up Fund (Project No. 4930977) and Collaborative Research Impact Matching Scheme (Project No. 4620030) from the Chinese University of Hong Kong, and the support from Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM) at City University of Hong Kong. The authors acknowledge the European Synchrotron Radiation Facility (ESRF) for provision of synchrotron radiation facilities and Momentum Transfer for facilitating the measurements. Jakub Drnec is thanked for assistance and support in using beamline ID31. The measurement setup was developed with funding from the European Union’s Horizon 2020 research and innovation program under the STREAMLINE project (grant agreement ID 870313).

Research Keywords

  • alkaline hydrogen evolution reaction
  • defect engineering
  • nanoheterostructure
  • Platinum-based nanocatalyst
  • two-dimensional metal nanomaterials

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