Activity Trends for the Selective Oxidation of 2-Propanol to Acetone on Noble Metal Electrodes in Alkaline Electrolyte

Mangoufis-Giasin I, Fusek L, Yang T, Khanipour P, Brummel O, Libuda J, Mayrhofer KJ, Calle-Vallejo F, Katsounaros I (2023)

Publication Type: Journal article

Publication year: 2023

Journal

ACS Catalysis American Chemical Society

Pages Range: 14562-14569

DOI: 10.1021/acscatal.3c03423

Abstract

Fuel cells based on 2-propanol can be used to produce electricity utilizing the hydrogen stored in liquid organic hydrogen carriers. While the focus has previously been on acidic media, where only platinum-based electrodes are active, we explore here the oxidation of 2-propanol in alkaline solutions on different noble metal electrodes. Using experimental and computational methods, we find that the reaction is selective to acetone, whereas C-C bond breaking and the formation of adsorbed CO do not take place. The onset potential increases along the series Rh < Pt < Pd < Au, a trend that correlates with the adsorption energy of acetone on the respective surfaces. The oxidation rate decays under potentiostatic conditions due to the progressive accumulation of acetone at the surface. At high overpotentials, the reaction is limited by oxide formation. Given that alkaline systems are not restricted to exclusively platinum-based electrodes, a broader range of materials may be found that act as anodes for efficient 2-propanol fuel cells.

Authors with CRIS profile

Lukáš Fusek Lehrstuhl für Katalytische Grenzflächenforschung Olaf Brummel Lehrstuhl für Katalytische Grenzflächenforschung Jörg Libuda Lehrstuhl für Katalytische Grenzflächenforschung

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE) University of Basque Country / Universidad del Pais Vasco (UPV) / Euskal Herriko Unibersitatea (EHU) ES Spain (ES) ShanghaiTech University / 上海科技大学 CN China (CN)

How to cite

APA:

Mangoufis-Giasin, I., Fusek, L., Yang, T., Khanipour, P., Brummel, O., Libuda, J.,... Katsounaros, I. (2023). Activity Trends for the Selective Oxidation of 2-Propanol to Acetone on Noble Metal Electrodes in Alkaline Electrolyte. ACS Catalysis, 14562-14569. https://doi.org/10.1021/acscatal.3c03423

MLA:

Mangoufis-Giasin, Iosif, et al. "Activity Trends for the Selective Oxidation of 2-Propanol to Acetone on Noble Metal Electrodes in Alkaline Electrolyte." ACS Catalysis (2023): 14562-14569.

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