ia synthesis over a Ru / La 0 . 5 Ce 0 . 5 O 1 . 75 catalyst pre-reduced at high temperature †

Department of Integrated Science and Techn Oita University, 700 Dannoharu, Oita 870-1 Elements Strategy Initiative for Catalysts an Ohara, Nishikyo-ku, Kyoto 615-8245, Japan The Ultramicroscopy Research Center, Kyu Fukuoka 819-0395, Japan Department of Applied Quantum Physics an Motooka 744, Nishi-ku, Fukuoka 819-0395, † Electronic supplementary information each method, catalytic performance, characterizations. See DOI: 10.1039/c7sc0 Cite this: Chem. Sci., 2018, 9, 2230