Sub-5 nm octahedral platinum-copper nanostructures anchored on nitrogen-doped porous carbon nanofibers for remarkable electrocatalytic hydrogen evolution.

Author(s) Zhang, J.; Jia, W.; Dang, S.; Cao, Y.
Journal J Colloid Interface Sci
Date Published 2020 Feb 15
Abstract

Designing of low-cost and high efficient Pt-based catalysts is significant for clean and renewable energy applications. Combining Pt with transition metals and reducing the particle size of Pt-based catalysts are two effective strategies to improve their performances toward hydrogen evolution reaction (HER). Meanwhile, one-dimensional nanostructures with interconnected porous texture are ideal supports in electrocatalysis. Herein, ZIF-67 were embedded into electrospun polyacrylonitrile (PAN) to obtain hierarchical porous carbon nanofibers which were used as supports to anchor sub-5 nm octahedral Pt-Cu nanocrystals. The as-prepared nanocomposites exhibit outstanding HER performance in acidic medium with an overpotential of only 13 mV at the current density of 10 mA cm and superior stability over 10,000 cycles. This outperforms commercial Pt/C and most supported catalysts reported so far. The remarkable HER properties may be mainly attributed to the unique structures of nitrogen-doped porous carbon nanofibers and Pt-Cu nanocrystals.

DOI 10.1016/j.jcis.2019.10.062
ISSN 1095-7103
Citation J Colloid Interface Sci. 2020;560:161168.

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