Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 560, Issue -, Pages 161-168Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.10.062
Keywords
Pt-based catalysts; Electrospinning; N-doped porous carbon nanofibers; Hydrogen evolution reaction
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Funding
- National Natural Science Foundation of China [21601150]
- Doctoral Fund of Xinjiang University [BS160255]
- Natural Science Foundation of Xinjiang Uygur Autonomous Region [2017D01C033]
- Scientific Research Program of the Higher Education Institution of Xinjiang [XJEDU2016S040]
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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(-2) 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. (C) 2019 Elsevier Inc. All rights reserved.
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