title: Concentration of hydrogen nanobubbles in electrolyzed water.
abstract: The hydrogen concentration of solutions supersaturated with hydrogen comprising dissolved hydrogen and hydrogen bubbles obtained through water electrolysis was studied. The rate of decrease in concentration of hydrogen nanobubble diameter below 600 nm and dissolved hydrogen with elapsed time after electrolysis was seemed to be independent of ionic strength and ion type and storage temperature. The concentration of hydrogen nanobubbles (mol dm(-3)) in electrolyzed water decreases with ionic strength, while the total hydrogen concentration remains roughly constant. The hydrogen nanobubble concentration increases in accordance with the nature of ions existing in solution in the following order I- < Br- < Cl- and K+ < Li+ < Na+. It is shown that the ratio of hydrogen nanobubble concentration to total hydrogen concentration of hydrogen in a catholyte strongly depends on the ratio in the supersaturated hydrogen solution near the electrode surface.
authors.affiliation: Department of Materials Science, University of Shiga Prefecture, Hassaka, Hikone, Shiga 522-8533, Japan. kikuchik@mat.usp.ac.jp
authors.forename: Kenji
authors.initials: K
authors.lastname: Kikuchi
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Saihara
authors.forename: Miho
authors.initials: M
authors.lastname: Maeda
authors.forename: Masaaki
authors.initials: M
authors.lastname: Kawamura
authors.forename: Zempachi
authors.initials: Z
authors.lastname: Ogumi