Electrochemical Oxidation of Methanol and Ethanol at Rh@Pt and Ru@Pt Catalysts | Zendy

Ehab N. El Sawy | Zendy; Tobias M. Brueckner | Zendy; Peter G. Pickup | Zendy

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Electrochemical Oxidation of Methanol and Ethanol at Rh@Pt and Ru@Pt Catalysts

Author(s) -

Ehab N. El Sawy,

Tobias M. Brueckner,

Peter G. Pickup

Publication year - 2020

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1945-7111/ab98f1

Subject(s) - chemistry , methanol , catalysis , bifunctional , electrochemistry , inorganic chemistry , redox , ethanol , rhodium , ruthenium , platinum , stoichiometry , nuclear chemistry , organic chemistry , electrode

The influence of the amount of Pt deposited onto Rh and Ru nanoparticles on the oxidation of methanol and ethanol has been compared in H 2 SO 4 (aq) at ambient temperature and in a proton exchange membrane (PEM) cell at 80 °C. In H 2 SO 4 (aq), Rh@Pt and Ru@Pt show similar enhancements in activities over Pt for both methanol and ethanol oxidation. However, differences in the optimum Pt coverage indicate that compression of the Pt lattice by Rh plays a dominate role, while ligand effects are more important for Ru@Pt. In the PEM cell, the Ru core enhanced activities significantly for both methanol and ethanol, while activities were suppressed by the Rh core. This may arise from dominance of ligand and/or bifunctional effects for the Ru@Pt catalyst at 80 °C. Data from the PEM cell showed that the stoichiometry for ethanol oxidation at Ru@Pt was higher than for Rh@Pt, indicating a higher selectivity for the complete oxidation to CO 2 .

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