Tantalum carbide as a novel support material for anode electrocatalysts in polymer electrolyte membrane water electrolysers

Publication: Research - peer-reviewConference article – Annual report year: 2012

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@article{7cd4fdde038a46799edde27fcfdf542b,
title = "Tantalum carbide as a novel support material for anode electrocatalysts in polymer electrolyte membrane water electrolysers",
keywords = "PEM water electrolysis, Iridium oxide anode electrocatalyst, Oxygen evolution reaction, Tantalum carbide, Corrosion resistance, Electrocatalyst support",
publisher = "Pergamon",
author = "Jakub Polonský and Irina Petrushina and Erik Christensen and K. Bouzek and Prag, {Carsten Brorson} and Andersen, {Jens Enevold Thaulov} and Niels Bjerrum",
year = "2012",
doi = "10.1016/j.ijhydene.2011.11.035",
volume = "37",
number = "3",
pages = "2173--2181",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",

}

RIS

TY - CONF

T1 - Tantalum carbide as a novel support material for anode electrocatalysts in polymer electrolyte membrane water electrolysers

A1 - Polonský,Jakub

A1 - Petrushina,Irina

A1 - Christensen,Erik

A1 - Bouzek,K.

A1 - Prag,Carsten Brorson

A1 - Andersen,Jens Enevold Thaulov

A1 - Bjerrum,Niels

AU - Polonský,Jakub

AU - Petrushina,Irina

AU - Christensen,Erik

AU - Bouzek,K.

AU - Prag,Carsten Brorson

AU - Andersen,Jens Enevold Thaulov

AU - Bjerrum,Niels

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - Iridium oxide (IrO2) currently represents a state of the art electrocatalyst for anodic oxygen evolution. Since iridium is both expensive and scarce, the future practical application of this process makes it essential to reduce IrO2 loading on the anodes of PEM water electrolysers. In the present study an approach to utilising a suitable electrocatalyst support was followed. Of the materials selected from a literature review, TaC has proved to be stable under the conditions of the accelerated stability test proposed in this study. The test involved dispersing each potential support material in a mixture of trifluoromethanesulfonic acid (TFMSA) and hydrogen peroxide at 130 °C. The liquid phase was subsequently analysed using ICP-MS with respect to the occurrence of ions potentially originating from the support material tested. The TaC support selected was additionally characterised by thermogravimmetric and differential thermal analysis to prove its thermal stability. A modified version of the Adams fusion method was used to deposit IrO2 on the support surface. A series of electrocatalysts was prepared with a composition of (IrO2)x(TaC)1−x, where x represents the mass fraction of IrO2 and was equal to 0.1, 0.3, 0.5, 0.7, 0.9 and 1. The thin-film method was used for electrochemical characterisation of the electrocatalysts prepared. SEM–EDX analysis, X-ray diffraction, N2 adsorption (BET) and powder conductivity measurements were used as complementary techniques to complete characterisation of the electrocatalysts prepared. The electrocatalysts with x ≥ 0.5 showed stable specific activity. This result is consistent with the conductivity measurements.

AB - Iridium oxide (IrO2) currently represents a state of the art electrocatalyst for anodic oxygen evolution. Since iridium is both expensive and scarce, the future practical application of this process makes it essential to reduce IrO2 loading on the anodes of PEM water electrolysers. In the present study an approach to utilising a suitable electrocatalyst support was followed. Of the materials selected from a literature review, TaC has proved to be stable under the conditions of the accelerated stability test proposed in this study. The test involved dispersing each potential support material in a mixture of trifluoromethanesulfonic acid (TFMSA) and hydrogen peroxide at 130 °C. The liquid phase was subsequently analysed using ICP-MS with respect to the occurrence of ions potentially originating from the support material tested. The TaC support selected was additionally characterised by thermogravimmetric and differential thermal analysis to prove its thermal stability. A modified version of the Adams fusion method was used to deposit IrO2 on the support surface. A series of electrocatalysts was prepared with a composition of (IrO2)x(TaC)1−x, where x represents the mass fraction of IrO2 and was equal to 0.1, 0.3, 0.5, 0.7, 0.9 and 1. The thin-film method was used for electrochemical characterisation of the electrocatalysts prepared. SEM–EDX analysis, X-ray diffraction, N2 adsorption (BET) and powder conductivity measurements were used as complementary techniques to complete characterisation of the electrocatalysts prepared. The electrocatalysts with x ≥ 0.5 showed stable specific activity. This result is consistent with the conductivity measurements.

KW - PEM water electrolysis

KW - Iridium oxide anode electrocatalyst

KW - Oxygen evolution reaction

KW - Tantalum carbide

KW - Corrosion resistance

KW - Electrocatalyst support

UR - http://www.journals.elsevier.com/international-journal-of-hydrogen-energy/

U2 - 10.1016/j.ijhydene.2011.11.035

DO - 10.1016/j.ijhydene.2011.11.035

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 3

VL - 37

SP - 2173

EP - 2181

ER -