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dc.contributor.authorWang, J.
dc.contributor.authorGao, Y.
dc.contributor.authorChen, D.
dc.contributor.authorLiu, J.
dc.contributor.authorZhang, Z.
dc.contributor.authorShao, Zongping
dc.contributor.authorCiucci, F.
dc.identifier.citationWang, J. and Gao, Y. and Chen, D. and Liu, J. and Zhang, Z. and Shao, Z. and Ciucci, F. 2018. Water Splitting with an Enhanced Bifunctional Double Perovskite. ACS Catalysis. 8 (1): pp. 364-371.

© 2017 American Chemical Society. The rational design of highly active and durable electrocatalysts for overall water splitting is a formidable challenge. In this work, a double perovskite oxide, i.e., NdBaMn 2 O 5.5 , is proposed as a bifunctional electrode material for water electrolysis. Layered NdBaMn 2 O 5.5 demonstrates significant improvement in catalyzing oxygen and hydrogen evolution reactions (OER and HER, respectively), in contrast to other related materials, including disordered Nd 0.5 Ba 0.5 MnO 3-d as well as NdBaMn 2 O 5.5-d and NdBaMn 2 O 5.5+d (d < 0.5). Importantly, NdBaMn 2 O 5.5 has an OER intrinsic activity (~24 times) and a mass activity (~2.5 times) much higher than those of the benchmark RuO 2 at 1.7 V versus the reversible hydrogen electrode. In addition, NdBaMn 2 O 5.5 achieves a better overall water splitting activity at large potentials ( > 1.75 V) and catalytic durability in comparison to those of Pt/C-RuO 2 , making it a promising candidate electrode material for water electrolyzers. The substantially enhanced performance is attributed to the approximately half-filled e g orbit occupancy, optimized O p-band center location, and distorted structure. Interestingly, for the investigated perovskite oxides, OER and HER activity seem to be correlated; i.e., the material achieving a higher OER activity is also more active in catalyzing HER.

dc.publisherAmerican Chemical Society
dc.titleWater Splitting with an Enhanced Bifunctional Double Perovskite
dc.typeJournal Article
dcterms.source.titleACS Catalysis
curtin.departmentWASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
curtin.accessStatusFulltext not available

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