Platinum Single Atoms Supported on Nanoarray-Structured Nitrogen-Doped Graphite Foil with Enhanced Catalytic Performance for Hydrogen Evolution Reaction
- 26 August 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 12 (34), 38106-38112
- https://doi.org/10.1021/acsami.0c09615
Abstract
Platinum-based single-atom catalysts (SACs) are among the most promising candidates for the practical applications of electrochemical hydrogen evolution reaction (HER), but their catalytic efficiency remains to be further enhanced. Herein, a well-designed nanoarray-structured nitrogen-doped graphite foil (NNGF) substrate is introduced to support Pt SACs in Pt-N-4 construction (Pt-1/NNGF) for HER. Within NNGF, the constructed nanoarray-structured surficial layer for supporting Pt SACs could enhance the exposure of active sites to the electrolyte and improve the reaction and diffusion kinetics; meanwhile, the retained graphite structures in bulk NNGF provide not only the required electrical conductivity but also the mechanical stability and flexibility. Because of such double-layer structures of NNGF, stable Pt-N-4 construction, and binder-free advantages, the Pt-1/NNGF electrode exhibits a low overpotential of 0.023 V at 10 mA cm(-2) and a small Tafel slope of 29.1 mV dec(-1) as well as an excellent long-term durability.Funding Information
- Ministry of Science and Technology of the People's Republic of China (2017YFE0301502)
- Institute of Materials, China Academy of Engineering Physics (TP03201703, TP03201802)
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