Hydrogen Production Catalyzed by Dicobalt Complex

2015 Fiscal Year Final Research Report

• Project/Area Number: 26620156
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Energy-related chemistry
• Research Institution: Kyushu University
• Principal Investigator: Hisaeda Yoshio 九州大学, 工学(系)研究科(研究院), 教授 (70150498)
• Co-Investigator(Renkei-kenkyūsha): SHIMAKOSHI Hisashi 九州大学, 工学研究院, 准教授 (00284539) ; ABE Masaaki 九州大学, 工学研究院, 准教授 (90260033) ; ONO Toshikazu 九州大学, 工学研究院, 助教 (20643513)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: コバルト錯体 / 酸化還元 / 光触媒 / 二核錯体 / 水素発生 / 電気化学的手法 / ヒドリド錯体

Outline of Final Research Achievements

In recent years, molecular hydrogen has attracted much attention as a carbon free fuel for future energy systems. Recently, the electrocatalytic activities of cobalt complexes such as cobalt porphyrins, cobaloxime, and imine/oxime cobalt complex, for hydrogen production have been reported. In these studies, electrochemically generated Co(I) species would reacts with proton to form Co(III)-H intermediate, and following mechanism for hydrogen production was discussed in many groups. We synthesized new imine/oxime based dicobalt complex and investigated electrochemical behavior in comparison to that of corresponding mono-cobalt complex. Using this dicobalt complex, we started to explore its proton reduction ability to form hydrogen. We report electrocatalytic hydrogen production from water using dicobalt complex as catalyst, and unique hydrogen evolution mechanism by dicobalt complex with intramolecular electron transfer in the catalytic cycle is proposed.

Free Research Field

生物無機化学