The effect of flow-field structure in toluene hydrogenation electrolyzer for energy carrier synthesis system

作者：Nagasawa Kensaku^*; Kato Akihiro; Nishiki Yoshinori; Matsumura Yoshimasa; Atobe Mahito; Mitsushima Shigenori

来源：Electrochimica Acta, 2017, 246: 459-465.

DOI：10.1016/j.electacta.2017.06.081

• toluene/methylcyclohexane organic hydride
• hydrogenation electrolysis
• flow-field structure

In this study, we investigated the effect of the design of the cathode flow-field structure on the electrochemical performance of the electrolyzer for the toluene-methylcyclohexane electrocatalytic hydrogenation synthesis system. The patterns of the basic flow-fields; i.e. parallel, interdigit, serpentine and porous-carbon, were investigated based on linear sweep voltammetry (LSV), internal, and cathodic and anodic charge transfer resistances with impedance spectroscopy and current efficiency. The flow-field pattern affected the toluene mass transportation and H-2 gas generation as a side reaction. Based on the LSV curve, the porous-carbon did not affect the overvoltage for the decrease in the toluene concentration, and showed the lowest cell voltage in the all flow-fields. The cathodic charge transfer resistance by impedance analysis and the current efficiency of the porous-carbon showed the highest performance in the all flow-fields over a wide toluene concentration range.

• 出版日期2017-8-20