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Evaluation of the intrinsic catalytic activity of nanoparticles without prior knowledge of the mass loading

Abstract

The quantitative characterisation of electrocatalytic properties of nanoparticle catalyst materi-als is so far only performed for layers typically comprising additionally conducting additives and binders. We propose a method enabling the evaluation of intrinsic catalytic activity of nanoparticles based on the diffusion-limited steady-state current. In a step-after-step process, the influence of coverage on kinetic and diffusion limited current is evaluated to highlight the challenges of sub monolayer electroanalysis. Conclusions are used to point out strategies and their limitations for qualitative and quantitative comparison of intrinsic catalytic properties. Particularly, the impact of coverage, electrode geometry, altered diffusion profile for nanopar-ticles and the catalyst activity and selectivity are discussed. Fundamental information about electrochemical sub monolayer nanoparticle analysis is provided.

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Publication details

The article was received on 14 Feb 2018, accepted on 20 Feb 2018 and first published on 20 Feb 2018


Article type: Paper
DOI: 10.1039/C8FD00029H
Citation: Faraday Discuss., 2018, Accepted Manuscript
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    Evaluation of the intrinsic catalytic activity of nanoparticles without prior knowledge of the mass loading

    T. Löffler, P. Wilde, D. Oehl, Y. Chen, K. Tschulik and W. Schuhmann, Faraday Discuss., 2018, Accepted Manuscript , DOI: 10.1039/C8FD00029H

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