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Catalysts 2018, 8(10), 461; https://doi.org/10.3390/catal8100461

Oxygen Reduction Reaction Electrocatalysis in Alkaline Electrolyte on Glassy-Carbon-Supported Nanostructured Pr6O11 Thin-Films

1
LEPMI, Université Grenoble Alpes, CNRS, Grenoble-INP (Institute of Engineering Univ. Grenoble Alpes), LEPMI, F-38000 Grenoble, France
2
Institut Universitaire de France, IUF, 75231 Paris Cedex 05, France
*
Authors to whom correspondence should be addressed.
Received: 18 September 2018 / Revised: 10 October 2018 / Accepted: 12 October 2018 / Published: 17 October 2018
(This article belongs to the Special Issue Catalysts for Polymer Membrane Fuel Cells)
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Abstract

In this work, hierarchical nanostructured Pr6O11 thin-films of brain-like morphology were successfully prepared by electrostatic spray deposition (ESD) on glassy-carbon substrates. These surfaces were used as working electrodes in the rotating disk electrode (RDE) setup and characterized in alkaline electrolyte (0.1 M NaOH at 25 ± 2 °C) for the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the oxygen reduction reaction (ORR) for their potential application in alkaline electrolyzers or in alkaline fuel cells. The electrochemical performances of these electrodes were investigated as a function of their crystallized state (amorphous versus crystalline). Although none of the materials display spectacular HER and OER activity, the results show interesting performances of the crystallized sample towards the ORR with regards to this class of non-Pt group metal (non-PGM) electrocatalysts, the activity being, however, still far from a benchmark Pt/C electrocatalyst. View Full-Text
Keywords: electrostatic spray deposition; Pr6O11; non-Pt group metal (non-PGM); electrocatalyst; alkaline electrolyte; oxygen reduction reaction electrostatic spray deposition; Pr6O11; non-Pt group metal (non-PGM); electrocatalyst; alkaline electrolyte; oxygen reduction reaction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sharma, R.K.; Müller, V.; Chatenet, M.; Djurado, E. Oxygen Reduction Reaction Electrocatalysis in Alkaline Electrolyte on Glassy-Carbon-Supported Nanostructured Pr6O11 Thin-Films. Catalysts 2018, 8, 461.

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