Platinum Ordered Porous Electrodes: Developing a Platform for Fundamental Electrochemical Characterization
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High surface area platinum electrodes with an ordered porous structure (Pt-OP electrodes) have been prepared and characterized by electrochemical methods. This study builds a foundation upon which we can seek an in-depth understanding of the limitations and design considerations to make efficient and stable Pt-OP electrodes for use in electrochemical applications. A set of Pt-OP electrodes were prepared by controlled electrodeposition of Pt through a self-assembled array of spherical particles and subsequent removal of the spherical templates by solvent extraction. The preparation method was shown to be reproducible and the resulting electrodes were found to have clean Pt surfaces and a large electrochemical surface area (A ecsa) resulting from both the porous structure, as well as the nano- and micro-scale surface roughness. Additionally, the Pt-OP electrodes exhibit a surface area enhancement comparable to commercially available electrocatalysts. In summary, the Pt-OP electrodes prepared herein show properties of interest for both gaining fundamental insights into electrocatalytic processes and for use in applications that would benefit from enhanced electrochemical response.
KeywordsElectrocatalysis Platinum Inverse opal Cyclic voltammetry Electron microscopy X-ray diffraction Electrochemical surface area
This work was supported in part by the Natural Sciences and Engineering Research Council of Canada, the Canada Research Chairs Program (B.D. Gates), and the Simons Foundation. This work made use of 4D LABS shared facilities supported by the Canada Foundation for Innovation, British Columbia Knowledge Development Fund, Western Economic Diversification Canada, and Simon Fraser University. We would like to thank Dr. Dev Sharma and Paul Mulyk for their assistance with FAAS measurements.
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