Selective Electrohydrogenation of Toluene to Methylcyclohexane Using Carbon‐Supported Non‐Platinum Electrocatalysts in the Hydrogen Storage System. Issue 5 (21st February 2017)

• Record Type: Journal Article
• Authors: Inami, Yuta; Ogihara, Hitoshi; Yamanaka, Ichiro
• Is Part Of: ChemistrySelect. Volume 2:Issue 5(2017)
• Page Start: 1939
• Page End: 1943
• Publication Date: 2017-02-21
• Subjects: hydrogen spillover -- hydrogen storage -- non-platinum cathode -- Ru and Ir synergy -- toluene electrohydrogenation; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201602070
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Electrochemical hydrogenation of toluene (TL) to methylcyclohexane (MCH) with water using a 50 wt% Pt/Ketjenblack (KB) cathode attracts much attention for the hydrogen storage system. We screened non‐Pt cathodes and found that lower loading Ru/KB electrocatalyst was effective cathode for the galvanostatic hydrogenation of TL. Even at 1 wt% loading, the Ru/KB cathode was active for the hydrogenation though the working potential was much negative; on the other hand, a 1 wt% Pt/KB cathode was inactive under the same conditions. To improve electrocatalysis of Ru/KB at positive cathode potential, combination of Ru and other metals was studied for the hydrogenation and synergy of Ru and Ir was found. A 5 wt% Ru and 5 wt% Ir supported on KB cathode was as active as the 50 wt% Pt/KB cathode for the hydrogenation. On the basis of experimental facts, a model of reaction mechanism for the electrohydrogenation of TL to MCH applying hydrogen spillover from Ir to Ru was proposed. Abstract : Development of non‐Pt cathode for electrohydrogenation of toluene to methylcyclohexane as hydrogen storage system was conducted. Synergy of Ru and Ir on carbon support for the efficient electrohydrogenation at positive potential was found.