期刊
ACS CATALYSIS
卷 9, 期 3, 页码 2448-2457出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.8b03610
关键词
electrohydrogenation; Ru and Ir synergy; spillover; PEM electrolyzer
资金
- Cross-ministerial Strategic Innovation Promotion Program (SIP)
- Council for Science, Technology and Innovation (CSTI)
- New Energy and Industrial Technology Development Organization (NEDO)
- Ookayama Materials Analysis Division, Tokyo Institute of Technology
An organic hydride system based on hydrogenation/dehydrogenation of toluene (TL)/methylcyclohexane (MCH) has been studied as a hydrogen storage technology. Electrohydrogenation of TL to MCH using a proton exchange membrane (PEM) electrolyzer is proposed as a candidate for the hydrogenation of TL in the organic hydride system. Recently, we reported that a Ketjenblack-supported Ru-Ir alloy (Ru-Ir/KB) cathode was effective for the reaction; however, electrohydrogenation mechanisms and catalyses of Ru and Ir in the electrohydrogenation have been unclear. In this paper, detailed characterization studies using transmission electron microscopy (TEM) with energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), X-ray absorption fine structure (XAFS), X-ray photoelectron spectroscopy (XPS), and electrochemical studies using cyclic voltammetry (CV) and linear sweep voltammetry (LSV) for hydrogen evolution and kinetic studies for catalytic hydrogenation of TL by Ru-Ir/KB catalysts were conducted. On the basis of the experimental results, the electrohydrogenation mechanisms and synergy of Ru and Ir were proposed.
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