Jingyuan Chen was born in 1957 and raised in Xiamen. She was a “Red Small Soldier”, then became a farmer. She is luckily, was passed the first university entrance exams after the Cultural Revolution in 1977 and graduation from Tianjin University of Science and Technology. She received her PhD degree from University of Fukui in 1996, supervised by Prof. Koichi Aoki. Since then she has set the life aiming to solving “fundamental subjects of basic electrochemistry” and defined the work focus on physics of interfacial phenomena. During her career, over the past 17 years has supervised more than 30 PhD students. 19 of them become a professor who work in university.
In 1996-1998, she was employed as a senior researcher in MAEDA KOSEN Company Limited. In 1998 she moved to Kanazawa University, working as a lecturer at school of Faculty of Science. In 2000-2001 she worked as a visiting scholar at Henry White's laboratory in University of Utah. Then she return to Japan, was employed as an associate professor at Aoki’s laboratory in University of Fukui and was appointed as a full professor of Applied Physics in 2017. During these activities, she has educated and supervised thirty-one PhD students from Japan, China, Thailand and other countries and areas.
Primary Affiliation: University of Fukui - 3-9-1 Bunkyo, Fukui , Japan
Determination of heterogeneous rate constants of redox reactions or charge transfer resistances always involves ambiguities due to their participation in double layer (DL) capacitances and solution resistances. The rate constants determined by steady-state voltammograms at ultra-microelectrodes are inconsistent with time-dependent voltammograms, implying participation of the DL impedance. We examine controlling factors of DLs through the frequency-dependence of the capacitance on the basis of the definition of the current and the capacitance. The capacitance obeys the power law of the frequency. It is controlled by the orientation of a limited amount of solvent dipoles, independent of salts. Redox species, dipoles of which are oriented oppositely to the solvent dipoles, decrease the DL capacitance and make the value negative at high concentrations of the species. The decrease in the capacitance increases the real impedance, as predicted from the phase angle, yielding an extra resistance. This may be a ghost charge transfer resistance. However, there are actually a number of well-defined charge transfer resistances, which are observed as transferring rates through films on electrodes.