期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 21, 页码 11701-11710出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.01.079
关键词
Electroless nickel plating; Phosphidation treatment; Nickel phosphide; Nanosheets/nanoparticles structure; Hydrogen evolution reaction
资金
- key project of Science and Technology Department in Sichuan province [2014FZ0120, 2016JY0203]
- key project of Sichuan University of Arts and Science [2018TZ001Z]
The research presents a novel method to prepare Ni5P4 nanosheets/nanoparticles structure on carbon cloth, showing excellent hydrogen evolution reaction (HER) activity with a large electrochemically active surface area and stability.
It is essential to search highly active, steady and cheap non-noble electrocatalyst for hydrogen evolution reaction (HER). At present, nickel phosphides are extensively used in electrochemical hydrogen evolution due to its excellent stability and activity. Hence, we report a facile, effective and feasible strategy to synthesis of Ni5P4 nanosheets/nanoparticles structure on carbon cloth, which was fabricated by electroless nickel plating on carbon cloth followed via straightforward thermal phosphidation treatment with NaH2PO2 as phosphorus source. The as-prepared CC@Ni-P electrocatalyst exhibits HER activity with low overpotentials (93 mV vs. RHE) to attain current density 10 mA/cm(2) as well as small Tafel slope (58.2 mV/dec), which outperforms most nickel phosphides electrocatalysts. The excellent HER performance can be ascribed to the large electrochemically active surface area, and phosphorus-rich Ni5P4 phase can supply further bridges sites of Ni and P. Significantly, as-prepared CC@Ni-P catalyst electrode exhibits no apparent HER activity decay after continuous stability test. Beyond that, the approach can be readily used to fabricate large size (5 x 5 cm) nickel phosphide electrocatalyst with excellent HER performance, which may be conducive to the proton exchange membrane (PEM) water electrolyser applications in future. This work opens an effective way to construct excellent performance transition-metal phosphides for HER. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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