Intensive research efforts have been placed on the study of new non-noble metal electrocatalysts for sustainable energy applications including metal-air batteries, fuel cells, solar cells and water splitting.1-4 Among these chemical-electricity conversion systems, oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are among the key redox reactions. High activity and stability using low-cost catalytic materials are important criteria. In this context, various types of perovskites and metal-based layered double hydroxides (LDHs) have rapidly emerged as promising catalytic materials. In this presentation, I will present our recent work on the development of novel ternary metal oxide compounds (AxByOz) as electrocatalysts for OER and ORR. Several different kinds of oxygen-deficient perovskites and related compounds will be reported. I will discuss of new synthetic approaches for metastable ternary oxide catalysts, and the effect of electronic configuration of active component metals and structural factors on catalyst performance in the above mentioned electrochemical reactions. Experimental data on the catalytic performance will be further analyzed using density functional theory (DFT) calculations. (1) Takeguchi, T.; Yamanaka, T.; Takahashi, H.; Watanabe, H.; Kuroki, T.; Nakanishi, H.; Orikasa, Y.; Uchimoto, Y.; Takano, H.; Ohguri, N.; Matsuda, M.; Murota, T.; Uosaki, K.; Ueda, W. J. Am. Chem. Soc. 2013, 135, 11125. (2) Savinell, R. F. Nat. Chem. 2011, 3, 501. (3) Lee, M. M.; Teuscher, J.; Miyasaka, T.; Murakami, T. N.; Snaith, H. J. Science 2012, 338, 643. (4) Vojvodic, A.; Norskov, J. K. Science 2011, 334, 1355.

Ternary metal oxide catalysts for electrochemical oxidation and reduction of oxygen

249th National Meeting (2015)

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