期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 41, 页码 21289-21297出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.03.224
关键词
CoAl LDH; Amorphous FeOOH; Oxygen evolution reaction; High-porosity; Capillary-liked morphology
资金
- Natural science research fund for colleges and universities in Anhui Province [KJ2019A0050]
- National Natural Science Foundation of China [21505050, 21673001, 21773114, 21972065]
Electrocatalytic water splitting is a promising approach for producing clean hydrogen, but faces challenges in the low efficiency of the oxygen evolution reaction (OER). Researchers have reported a novel OER catalyst with excellent activity, showing potential to enhance the efficiency and stability of OER.
Electrocatalytic water splitting is a promising route for the generation of clean hydrogen. However, the anodic oxygen evolution reaction (OER) suffers greatly from low reaction kinetics and thereby hampers the energy efficiency of alkaline water electrolysers. In recent years, tremendous efforts have been dedicated to the pursuit of highly efficient, low cost and stable electrocatalysts for oxygen evolution reaction. Herein, an amorphous FeOOH roughened capillary-liked CoAl layered double hydroxide (LDH) catalyst grown on nickel foam (denoted as FeOOH-CoAl LDH/NF) was reported for OER electrolysis. The developed FeOOH-CoAl LDH/NF electrode shows excellent OER activity with over potentials of 228 mV and 250 mV to deliver a current density of 50 mA cm(-2) and 100 mA cm(-2) in 1.0 M KOH solution, respectively, ranking it one of the most promising OER catalysts based on transition-metal-based LDH. This is owed to the formed capillary-liked hierarchy structure with high-porosity as well as the strong electronic interaction between FeOOH and CoAl LDH. The developed morphological engineering approach to build hierarchal porous structures together with facile amorphous FeOOH modification may be extended to other layered double hydroxide catalyst for enhanced OER activities. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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