Transition Metal Oxides for the Oxygen Reduction Reaction: Influence of the Oxidation States of the Metal and its Position on the Periodic Table

Rou Jun Toh, Zdeněk Sofer, Martin Pumera

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Electrocatalysts have been developed to meet the needs and requirements of renewable energy applications. Metal oxides have been well explored and are promising for this purpose, however, many reports focus on only one or a few metal oxides at once. Herein, thirty metal oxides, which were either commercially available or synthesized by a simple and scalable method, were screened for comparison with regards to their electrocatalytic activity towards the oxygen reduction reaction (ORR). We show that although manganese, iron, cobalt, and nickel oxides generally displayed the ability to enhance the kinetics of oxygen reduction under alkaline conditions compared with bare glassy carbon, there is no significant correlation between the position of a metal on the periodic table and the electrocatalytic performance of its respective metal oxides. Moreover, it was also observed that mixed valent (+2, +3) oxides performed the poorest, compared with their respective pure metal oxides. These findings may be of paramount importance in the field of renewable energy.

Original languageEnglish
Pages (from-to)3527-3531
Number of pages5
JournalChemPhysChem
Volume16
Issue number16
DOIs
Publication statusPublished - 2015 Nov 16

Bibliographical note

Funding Information:
M.P. thanks the NAP (NTU) fund. R.J.T. and M.P. acknowledge financial support from SMA3 Singapore-MIT Alliance for Research and Technology (SMART) Center, Biosystems and Micromechanics (BioSym) IRG, Singapore. Z.S. was supported by Czech Science Foundation (GACR No. 13-17538S).

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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