Development of Refractory Ceramics for The Oxygen Evolution Reaction (OER) Electrocatalyst Support for Water Electrolysis at elevated temperatures

Aleksey Nikiforov, Carsten Brorson Prag, J. Polonsky, Irina Petrushina, Erik Christensen, Niels Bjerrum

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Abstract

Commercial TaC and Si3N4 powders were tested as possible electrocatalyst support materials for the Oxygen Evolution Reaction (OER) for PEM water electrolysers, operating at elevated temperatures. TaC and Si3N4 were characterised by thermogravimmetric and differential thermal analysis for their thermal stability. The Adams fusion method was implemented to deposit IrO2 on the support surfaces. A series of electrocatalysts was prepared with a composition of (IrO2)x(TaC/ Si3N4)1-x,where x represents the mass fraction of IrO2 and was equal to 0.1 (only for TaC), 0.3, 0.5, 0.7, 0.9 and 1. The thin-film method was used for electrochemical analysis of the prepared electrocatalysts. SEMEDX, BET and powder conductivity measurements were used as complementary techniques to complete characterisation of the electrocatalysts. Additionally, they were compared in their properties with previously reported data for a SiC-Si support. The stability of the electrocatalysts was assessed by estimation of reversibility of the anodic/cathodic processes. © The Electrochemical Society
Original languageEnglish
JournalE C S Transactions
Volume41
Issue number42
Pages (from-to)115-124
ISSN1938-5862
DOIs
Publication statusPublished - 2012
Event220th ECS Meeting - Boston, MA, United States
Duration: 9 Oct 201114 Oct 2011
Conference number: 220
http://www.electrochem.org/meetings/biannual/220/220.htm

Conference

Conference220th ECS Meeting
Number220
CountryUnited States
CityBoston, MA
Period09/10/201114/10/2011
Internet address

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