Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 29, Pages 24634-24648Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b06855
Keywords
catalysis; oxygen evolution reaction; template synthesis; perovskite; electrochemistry
Funding
- U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division
- U.S. Department of Energy [DE-SC-00112704]
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The oxygen evolution reaction (OER) is a key reaction for water electrolysis cells and air-powered battery applications. However, conventional metal oxide catalysts, used for high-performing OER, tend to incorporate comparatively expensive and less abundant precious metals such as Ru and Ir, and, moreover, suffer from poor stability. To attempt to mitigate for all of these issues, we have prepared one-dimensional (1D) OER-active perovskite nanorods using a unique, simple, generalizable, and robust method. Significantly, our work demonstrates the feasibility of a novel electroless, seedless, surfactant-free, wet solution-based protocol for fabricating high aspect ratio LaNiO3 and LaMnO3 nanostructures. As the main focus of our demonstration of principle, we prepared as-synthesized LaNiO3 rods and correlated the various temperatures at which these materials were annealed with their resulting OER performance. We observed generally better OER performance for samples prepared with lower annealing temperatures. Specifically, when annealed at 600 inverted perpendicular C, in the absence of a conventional conductive carbon support, our as-synthesized LaNiO3 rods not only evinced (i) a reasonable level of activity toward OER but also displayed (ii) an improved stability, as demonstrated by chronoamperometric measurements,
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