期刊
MATERIALS TODAY ENERGY
卷 27, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2022.101046
关键词
Oxygen evolution reaction; Pulsed laser deposition; In situ Raman investigation; Active (oxy)hydroxide layer
资金
- Science and Technology Devel-opment Fund from Macau SAR [FDCT-0081/2019/AMJ, FDCT-0102/2019/A2, FDCT-0035/2019/AGJ, FDCT-0154/2019/A3, FDCT-0033/2019/AMJ, MYRG2018-00003-IAPME]
- Research & Development Office at University of Macau
In this study, a nanofilm of Ba0.5Sr0.5Co0.8Fe0.2O3-delta deposited on nickel foam was successfully fabricated using pulsed laser deposition. Real-time surface changes were observed by in situ Raman spectroscopy. Additionally, a surface reductive strategy was applied to enhance the oxygen evolution reaction (OER) activity. The correlation between surface electron structure and catalytic activity was established and discussed.
The oxygen evolution reaction (OER) is the main obstacle to overall water splitting and therefore the focus of recent research. Perovskite oxides have been regarded as promising OER catalysts due to their superior activity and compositional flexibility. In this work, a nanofilm of Ba0.5Sr0.5Co0.8Fe0.2O3-delta deposited on nickel foam (BSCF-NF) was fabricated by pulsed laser deposition (PLD), and the real-time dynamic surface change was observed by in situ Raman spectroscopy. In addition, a surface reductive strategy is applied to BSCF-NF, which is then demonstrated to facilitate the formation of active species on B-site cations, resulting in enhanced OER activity. The reconstruction activation potential of BSCF-NF is reduced after the reductive treatment. The correlation between surface electron structure and catalytic activity is established and discussed. This work provides not only a facile strategy for promoting the formation of active species but also an in-depth understanding of the fundamental processes of surface reconstruction and the origins behind the improved OER performance for perovskite catalysts. (c) 2022 Elsevier Ltd. All rights reserved.
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