Journal
ELECTROCHIMICA ACTA
Volume 299, Issue -, Pages 828-834Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.01.031
Keywords
Electrocatalysis; Hydrogen evolution reaction; Rhodium; Silicon; Carbon
Categories
Funding
- National Key Research and Development Program of China [2017YFA0204800]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- 111 Project
- Joint International Research Laboratory of Carbon-Based Functional Materials and Devices
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Though noble metals play a key role in the clean energy research, their wide practical applications have been limited by the high cost and the scarce natural reserves. It is significant to decrease their usage and increase the active sites in the catalysis. Herein, Rh nanocrystals were grown on the surface of silicon quantum dots with the help of Si-H bonds to obtain Rh-Si composites, which combined with carbon quantum dots to fabricate Rh-Si-C nanocomposites. The silicon quantum dots limited the size of Rh and prevented the aggregation. The addition of carbon quantum dots greatly increased the electron transportation during the catalytic process. When the Rh-Si-C nanocomposites were applied as electro-catalysts for hydrogen evolution reaction (HER), the optimal one exhibits Pt-like HER performance (low Tafel slope of 26 mV.dec(-1) and long-term stability) with the content of noble metal less than half of that in 20 wt% Pt/C. This work could put forward an effective avenue to develop high efficient and affordable electrochemical catalysts for HER. (C) 2019 Published by Elsevier Ltd.
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