| Autor: |
Kangli Chen, Yuan Li, Guanjiu Wu, Qing Wang, Chenfeng Fan, Lu Zhang, Jianzheng Song, Shumin Hanz |
| Zdroj: |
Journal of The Electrochemical Society; Sep2023, Vol. 170 Issue 9, p1-6, 6p |
| Abstrakt: |
Designing Earth-abundant, cost-effective catalysts for hydrogen evolution via water splitting is essential for hydrogen generation. Adding a third metal element to binary phosphides provides the opportunity to tune their morphology, crystalline and electronic structures and thus their electrocatalytic properties. In this study, a hierarchical crystalline/amorphous Ni-Co-P compound is prepared on nickel foam (NF) with different nickel to cobalt ratio by one-step electrodepositing technique. The Ni-Co-P/NF is composed of metallic Co and amorphous phosphides. It has hierarchical morphology, consisting of ~800 nm spherical particles in the bottom layer, ~1.5 μm spherical particles in the middle layer, and staggered network structure on the top layer. The Ni-Co-P/NF electrode exhibits superior hydrogen evolution reaction (HER) catalytic activity in the alkaline solution, which requires only 72 mV for delivering 10 mA cm-2. More importantly, the Ni-Co-P/NF catalyst sustains the current density of 20 mAcm-2 for 53 h with negligible degradation in overpotential which shows remarkable electrochemical stability. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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