期刊
ELECTROCHIMICA ACTA
卷 219, 期 -, 页码 553-559出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.10.031
关键词
electrocatalysis; oxygen evolution reaction; perovskite; solid-state reaction; water splitting
资金
- National Nature Science Foundation of China [21576135]
- Major Project of Educational Commission of Jiangsu Province of China [13KJA430004]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Changjiang Scholars Program [T2011170]
- Chinese Academy of Sciences Innovative and Interdisciplinary Team Award
Development of electrocatalysts for the oxygen evolution reaction (OER) plays a critical role in electrochemical water splitting systems. Perovskite oxides represent one category of efficient catalysts for the OER, among which Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) has been extensively studied. In this work, we discussed the effect of synthesis approaches on the OER performance of BSCF. Three routes, including solution combustion, sol-gel process and solid-state reaction, were applied to synthesize the bulk-sized BSCF perovskites, denoted as BSCF-SC, BSCF-SG and BSCF-SS, respectively. Electrochemical measurements revealed varied OER performance, with BSCF-SS showing the highest intrinsic activity much better than that of BSCF-SC and BSCF-SG. The activity difference may originate from the variation in the surface oxidation states of the B-site cobalt cations. Moreover, all the BSCF perovskites exhibited comparably good stability in catalyzing the OER. In light of the simplicity, the viability for scale-up and the high activity of BSCF-SS, solid-state reaction may be a suitable way for fabricating highly-active BSCF electrocatalyst. This study could provide new insight into enhanced oxygen evolution on perovskite oxides by selecting an optimized synthesis approach. (C) 2016 Elsevier Ltd. All rights reserved.
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