Journal
CHEMSUSCHEM
Volume 13, Issue 16, Pages 4094-4102Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202001227
Keywords
amidation effect; carbon fibres; carbon dots; electrochemical hydrogen production; percolation theory
Funding
- National Natural Science Foundation of China [51873085]
- Natural Science Foundation of Liaoning Province [20180510023, 20180550947]
- Program for the Top Young and Middle-aged Innovative Talents of Higher Learning Institutions of Liaoning Province of China [LR2018010]
- Natural Science Foundation for Education Department of Liaoning Province of China [LJC201906]
- Liaoning Revitalization Talents Program-Pan Deng Scholars [XLYC1802005]
- Liaoning BaiQianWan Talents Program
- National Science Fund of Liaoning Province for Excellent Young Scholars [2019-YQ-04]
- Science and Technology Innovative Talents Support Program of Shenyang [RC180166]
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Developing hydrogen evolution reaction (HER) electrocatalysts with high activity, durability and moderate price is essential for sustainable hydrogen energy utilization. Here, the facile coupling of carbon dots (CDs, 0D carbon materials) and carbon fibres (CFs, 1D carbon materials) for enhanced electrochemical hydrogen production was demonstrated. Electrochemical tests revealed that the CD/CF catalysts showed outstanding catalytic activity with a small overpotential of 280 mV at the current density of 10 mA cm(-2), a small Tafel slope of 87 mV dec(-1)and prominent durability. Percolation theory was for the first time introduced to interpret the catalytic mechanism of the CD/CF catalysts. The special morphology assembled by the 0D carbons constituted the percolating clusters and promoted electron transport throughout the 1D carbons. The strategy and theory can be adapted to general electrocatalytic applications for achieving and interpreting precise tuning on highly efficient electron transfer in electrocatalysts.
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