Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 64, Pages 32385-32393Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.07.111
Keywords
Heterojunction electrocatalyst; Interface engineering; Electronic structure; NiVP; Oxygen evolution reaction
Categories
Funding
- National Natural Science Foundation of China [51504147, 21902123]
- Natural Science Basic Research Program of Shaanxi Province [2020JQ-806]
- National & Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology Open Fund [SLGPT2019KF0103]
- Special Scientific Research Planned Projects of Education Department of Shaanxi Provincial [15JK1165]
- Research Projects of Shaanxi University of Technology [SLGKY2007]
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The construction of NiVP@NiFeV-LDH heterojunction catalysts significantly enhances the oxygen evolution reaction performance, providing a novel approach for large-scale hydrogen production.
The emergence of alternative sustainable energy technologies has stimulated the utilisation of high-efficiency, cost-effective electrodes for renewable energy conversion. The oxygen evolution reaction (OER) is critical for water splitting and rechargeable metal-air batteries. However, the identification of efficient and robust non-noble-metal-based OER electrocatalysts remains a major hurdle for large-scale hydrogen production. Herein, NiVP@NiFeV-LDH heterojunction catalysts were constructed by phosphidation and hydrothermal processing, because OER activity can be improved by coupling NiVP and NiFeVLDH. NiVP@NiFeV-LDH/NF exhibited remarkable OER performance with an ultralow overpotential of 317 mV at a current density of 100 mA cm(-2) and a Tafel slope of 83.0 mV dec(-1) in an alkaline environment. The high efficiency of NiVP@NiFeV-LDH/NF is attributed to increased mass and electron transport because of array structure formation and interfacial electronic structure optimisation, respectively. This work provides a novel approach for augmenting the OER performance of non-noble-metal-based electrocatalysts for energy conversion applications. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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