Electrochemical exfoliation of graphite using aqueous ammonium hydrogen carbonate solution and the ability of the exfoliated product as a hydrogen production electrocatalyst support
Ryuichi Maekawa,
Hirooki Kajiwara,
Yuto Washiyama,
Yasushi Nishikawa,
Naoto Kuwamura,
Toshinori Okura,
Yuta Nishina,
Hideki Hashimoto
Affiliations
Ryuichi Maekawa
Applied Chemistry and Chemical Engineering, Graduate School of Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan
Hirooki Kajiwara
Applied Chemistry and Chemical Engineering, Graduate School of Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan
Yuto Washiyama
Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan
Yasushi Nishikawa
Kaneka Corporation, 5-1-1 Torikainishi, Settu, Osaka, 566-0072, Japan
Naoto Kuwamura
Division of Liberal Arts, Center for Promotion of Higher Education, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan
Toshinori Okura
Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan
Yuta Nishina
Research Core for Interdisciplinary Sciences, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan; Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
Hideki Hashimoto
Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan; Corresponding author.
Electrochemical exfoliation of graphite has attracted much attention as a practical mass production of two-dimensional graphene-like materials. There is an increasing desire to find new and improved methods to create unique exfoliated products with excellent functionality. We used aqueous ammonium hydrogen carbonate solution as a new electrolyte for anodic oxidative exfoliation of graphite. The exfoliated product has a porous two-dimensional structure, and it can be dispersed in water for over five years. The oxidized and defected porous surface serves as an ideal support for molecular metal complexes, effectively functioning as heterogeneous electrocatalysts for hydrogen production.
