Department of Chemistry, University of Hawaii, Honolulu, HI 96822, USA
Etsuo Akiba
Department of Mechanical Engineering, WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan
Hai-Wen Li
International Research Center for Hydrogen Energy, WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan
