Journal
ELECTROCHIMICA ACTA
Volume 298, Issue -, Pages 142-149Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.12.055
Keywords
Water splitting; Hydrogen evolution; Catalyst; P-doped carbon nanotubes; Nickel foam
Categories
Funding
- Fundamental Research Foundation for the Central Universities [2015XKMS031]
- Natural Science Foundation of China [21872040]
- European Union national fund through the Operational Program Competitiveness, Entrepreneurship and Innovation, under the call RESEARCH - CREATE - INNOVATE of Greece [T1EDK-02442]
- Greek national fund through the Operational Program Competitiveness, Entrepreneurship and Innovation, under the call RESEARCH - CREATE - INNOVATE of Greece [T1EDK-02442]
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Electrochemical water splitting attracted an increasing attention as a promising approach to produce high-purity hydrogen. Both the design and synthesis of low-cost and high-performance catalysts for hydrogen evolution reaction (HER) remain challenging. Herein, an in-situ growth of carbon nanotubes encapsulated Ni particles on nickel foam is described. This catalyst is synthesized via a one-step chemical vapor deposition (CVD) at different temperatures followed by P-doping treatment (P-doped Ni@CNTs/NF). The corresponding physicochemical and electrochemical results illustrate that the P-doped Ni@CNTs/NF prepared at 600 degrees C with flower-like structure exhibits excellent activity and stability for HER in acidic electrolytes. In 0.5 MH2SO4 aqueous solution, the sample shows a small overpotential value of -135.2 mV to achieve a current density of -10 mA cm(-2), which also displays acceptable long-term stability for lasting 20 h. This work provides a facile approach to prepare a cost-effective catalyst with high efficiency and might promote further study of the transition metal catalysts for hydrogen evolution in acid environments. (C) 2018 Elsevier Ltd. All rights reserved.
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