Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 45, Issue 56, Pages 32000-32011Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.08.259
Keywords
Water splitting; HER; OER; Ni/NiO/TiO2; Reduced graphene oxide; PECVD
Categories
Funding
- French Embassy in Egypt (Institute Francais d'Egypte)
- Academy of Scientific Research & Technology - Egypt (ASRT)
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The facile synthesis and design of noble metal-free efficient catalysts to accelerate the sluggish kinetics of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is still a big challenge for electrolytic water splitting. In that context, the preparation of efficient catalysts with superior catalytic activity from cheap raw materials on a large scale is crucial. Briefly, Ni/NiO/TiO2/rGO is designed using the environmental-friendly and easily up-scalable PECVD technique. This trinary composite presents significance in regulating the crystalline structure, composition and electronic properties towards superior HER and OER activity in acidic solution as bifunctional electrocatalysts for efficient water splitting. Together with the promising long-term stability and durability, Ni/NiO/TiO2/rGO displays excellent electrocatalytic activity towards HER with eta(10) of 130 my vs RHE and a Tafel slope of 40 mV/dec. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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