期刊
NANOSCALE
卷 12, 期 27, 页码 14615-14625出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr03378b
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资金
- National Key Research and Development Program of China [2017YFA0206500]
- Key Program of National Natural Science Foundation of China [51732002]
- Distinguished Scientist Program at BUCT [buctylkxj02]
- Australian Research Council (ARC) [DP 190103881, FL 190100126]
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- BUCT
Trifunctional electrocatalysts for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are crucial for many electrochemical devices. Herein, novel trifunctional electrocatalysts of a hierarchically-structured Pt/NiO/Ni/CNT with ultrasmall Pt nanoparticles (similar to 2 nm) were synthesizedviasubstrate-enhanced electroless deposition. The resulting catalysts exhibited a higher ORR activity (half-wave potential at 0.942 V) than that of the benchmark commercial Pt/C (20 wt%) and a similar OER activity (overpotential of 350 mV at 10 mA cm(-2)) to that of RuO(2)in alkaline media. Moreover, the newly-developed Pt/NiO/Ni/CNT catalysts also showed a high mass activity superior to Pt/C towards the HER in both acid and alkaline electrolytes. The Pt/NiO/Ni/CNT catalysts, when used for overall water splitting, self-powered by two Zn-air batteries with the Pt/NiO/Ni/CNT air electrodes connected into series, displayed superb performance with 1.61 V at 10 mA cm(-2). This work represents a breakthrough in the development of facile approaches to trifunctional catalysts from low-cost Earth-abundant materials for efficient energy conversion and storage.
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