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Tuning Bifunctional Oxygen Electrocatalysts by Changing the A-Site Rare-Earth Element in Perovskite Nickelates
Wang, L; Stoerzinger, KA; Chang, L; Zhao, JL; Li, YY; Tang, CS; Yin, XM; Bowden, ME; Yang, ZZ; Guo, HZ; You, L; Guo, R; Wang, J; Ibrahim, K; Chen, JS; Rusydi, A; Wang, JL; Chambers, SA; Du, YG; Zhao JL(赵佳丽); Wang JO(王嘉鸥); Kui RX(奎热西)
2018
发表期刊ADVANCED FUNCTIONAL MATERIALS (IF:12.124[JCR-2016],12.362[5-Year])
ISSN1616-301X
EISSN1616-3028
卷号28期号:39页码:1803712
文章类型Article
摘要Perovskite-structured (ABO(3)) transition metal oxides are promising bifunctional electrocatalysts for efficient oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). In this paper, a set of epitaxial rare-earth nickelates (RNiO3) thin films is investigated with controlled A-site isovalent substitution to correlate their structure and physical properties with ORR/OER activities, examined by using a three-electrode system in O-2-saturated 0.1 m KOH electrolyte. The ORR activity decreases monotonically with decreasing the A-site element ionic radius which lowers the conductivity of RNiO3 (R = La, La0.5Nd0.5, La0.2Nd0.8, Nd, Nd0.5Sm0.5, Sm, and Gd) films, with LaNiO3 being the most conductive and active. On the other hand, the OER activity initially increases upon substituting La with Nd and is maximal at La0.2Nd0.8NiO3. Moreover, the OER activity remains comparable within error through Sm-doped NdNiO3. Beyond that, the activity cannot be measured due to the potential voltage drop across the film. The improved OER activity is ascribed to the partial reduction of Ni3+ to Ni2+ as a result of oxygen vacancies, which increases the average occupancy of the e(g) antibonding orbital to more than one. The work highlights the importance of tuning A-site elements as an effective strategy for balancing ORR and OER activities of bifunctional electrocatalysts.
关键词nickelates oxygen evolution reaction oxygen reduction reaction oxygen vacancy perovskite
DOI10.1002/adfm.201803712
关键词[WOS]METAL-INSULATOR-TRANSITION ; REDUCTION REACTION ; EVOLUTION REACTION ; CHARGE-TRANSFER ; AIR BATTERIES ; FUEL-CELLS ; B-SITE ; ENERGY ; OXIDES ; PRINCIPLES
收录类别SCI ; EI
语种英语
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号WOS:000445327300023
EI入藏号20183505759076
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文献类型期刊论文
条目标识符https://ir.ihep.ac.cn/handle/311005/286361
专题粒子天体物理中心
多学科研究中心
作者单位中国科学院高能物理研究所
第一作者单位中国科学院高能物理研究所
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GB/T 7714
Wang, L,Stoerzinger, KA,Chang, L,et al. Tuning Bifunctional Oxygen Electrocatalysts by Changing the A-Site Rare-Earth Element in Perovskite Nickelates[J]. ADVANCED FUNCTIONAL MATERIALS,2018,28(39):1803712.
APA Wang, L.,Stoerzinger, KA.,Chang, L.,Zhao, JL.,Li, YY.,...&奎热西.(2018).Tuning Bifunctional Oxygen Electrocatalysts by Changing the A-Site Rare-Earth Element in Perovskite Nickelates.ADVANCED FUNCTIONAL MATERIALS,28(39),1803712.
MLA Wang, L,et al."Tuning Bifunctional Oxygen Electrocatalysts by Changing the A-Site Rare-Earth Element in Perovskite Nickelates".ADVANCED FUNCTIONAL MATERIALS 28.39(2018):1803712.
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