Physical and electrochemical evaluation of ATO supported IrO2 catalyst for proton exchange membrane water electrolyser
School of Chemical Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom; South African Institute for Advanced Materials Chemistry (SAIAMC), Faculty of Science, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
Antimony doped tin oxide (ATO) was studied as a support material for IrO2 in proton exchange membrane water electrolyser (PEMWE). Adams fusion method was used to prepare the IrO2-ATO catalysts. The physical and electrochemical characterisation of the catalysts were carried out using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder conductivity, cyclic voltammetry (CV) and membrane electrode assembly (MEA) polarisation. The BET surface area and electronic conductivity of the supported catalysts were found to be predominantly arisen from the IrO2. Supported catalyst showed higher active surface area than the pristine IrO2 in CV analysis with 85% H3PO4 as electrolyte. The MEA performance using Nafion®-115 membrane at 80 °C and atmospheric pressure showed a better performance for IrO2 loading. © 2014 Published by Elsevier B.V. All rights reserved.
Atmospheric pressure; Catalyst supports; Cyclic voltammetry; Hydrogen; Hydrogen production; Nanocomposites; Proton exchange membrane fuel cells (PEMFC); Scanning electron microscopy; Tin; Transmission electron microscopy; X ray diffraction; Antimony tin oxide; Hydrogen generations; Iridium dioxide; Oxygen evolution reaction; PEM water electrolysis; Loading
EP/G042012/1, EPSRC, Engineering and Physical Sciences Research Council