Issue 5, 2015

High activity and durability of novel perovskite electrocatalysts for water oxidation

Abstract

Development of highly active and cost-effective electrocatalysts is central to the large-scale electrolysis of water for renewable energy generation. Perovskite oxides are a group of promising candidates to lower the oxygen evolution reaction (OER) barriers in water splitting and further improvement of their activity and durability is an important objective. Here we report scandium and niobium cation (Sc3+ and Nb5+) doped strontium cobaltite perovskites (SrScxNbyCo1−xyO3−δ) as a family of highly active and durable electrocatalysts for the OER in alkaline solution. These perovskites not only manifest up to a factor of 50 increase of the intrinsic activity compared to the gold-standard OER electrocatalysts (such as IrO2 and RuO2) and a factor of 5.8 enhancement to the perovskite-Ba0.5Sr0.5Co0.8Fe0.2O3−δ at an overpotential of 0.35 V, but also, more importantly, show excellent durability in alkaline solutions under operation.

Graphical abstract: High activity and durability of novel perovskite electrocatalysts for water oxidation

Supplementary files

Article information

Article type
Communication
Submitted
04 Jun 2015
Accepted
26 Jun 2015
First published
26 Jun 2015

Mater. Horiz., 2015,2, 495-501

Author version available

High activity and durability of novel perovskite electrocatalysts for water oxidation

W. Zhou, M. Zhao, F. Liang, S. C. Smith and Z. Zhu, Mater. Horiz., 2015, 2, 495 DOI: 10.1039/C5MH00096C

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