Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 54, Issue -, Pages 510-518Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2020.06.042
Keywords
Oxygen evolution reaction; Laser ablation; RuO2
Funding
- Key Research and Development of Ministry of Science and Technology of China [2018YFE0202600]
- National Natural Science Foundation of China [11947070, 51902220, 51572183]
- Materials Science & Engineering of Zhejiang Province First-Class Discipline [P61021902]
- Cultivating Program of Taizhou University [2018PY050]
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The catalytic activity of RuO2 particles for OER has been significantly improved by treating the nanoparticles with pulse laser ablation, generating lychee-shaped morphology that benefits OER performance. The top-class results in both alkali and acid environments demonstrate the potential of developing high-performance electrocatalysts for OER through this new method.
Improving the OER activity of noble metal-based materials is of profound importance to minimize the usage of noble metals and lower the cost. Here, we report considerable improvement on the catalytic activity of RuO2 particles for OER in both alkali and acid environments. The RuO2 nanoparticles were treated with a method of pulse laser ablation. Numerous Ru and RuO2 clusters were generated at the surface of RuO2 nanoparticles after the laser ablation, forming a lychee-shaped morphology. The larger pulse energy RuO2 nanoparticles are treated with, the better the OER activity can be. DFT calculations shows that the surface tension induced by the lychee-shaped morphology benefits the OER performance. Our best sample gives an overpotential of 172 mV (at 10 mA cm(-2)) and a Tafel slope of 53.5 mV dec(-1) in KOH, while an overpotential of 219 mV and a Tafel slope of 44.9 mV dec(-1) in H2SO4, which are of top-class results. This work may inspire a new way to develop high-performance electrocatalysts for OER. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
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