<p>Liquid Organic Hydrogen Carriers (LOHC) were an important development direction for diversified hydrogen storage and transportation technologies. Electrochemical in-situ hydrogenation of liquid organic compounds can effectively couple hydrogen production and storage processes, which had important research significance and potential application prospects. This paper used dibenzyltoluene (H0-DBT) as an electrochemical liquid organic in-situ hydrogen storage material, which was a new attempt and provided new ideas for the selection of future electrochemical liquid organic hydrogen storage materials. The research results indicated that in situ electrochemical hydrogenation of H0-DBT was feasible. Through the analysis of cyclic voltammetry and electrochemical impedance spectroscopy, the hydrogenation reduction of H0-DBT on the Ru-Ti-Ir electrode surface was carried out in multiple steps controlled by diffusion. With the increase of temperature, proton donor concentration and H0-DBT concentration, the hydrogenation current density of H0-DBT increased. The hydrogenation products of H0-DBT were intermediate hydrogenation product (H12-DBT) and perhydro-dibenzyltoluene (H18-DBT). The process of hydrogenation from H0-DBT to H12-DBT was faster, while the process of hydrogenation from H12-DBT to H18-DBT was slower.</p> Graphical Abstract <p></p>

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In situ electrochemical hydrogenation of dibenzyltoluene as liquid organic hydrogen carrier

  • Haiyan Huang,
  • Song Zheng,
  • Zhifang Cheng,
  • Keng H. Chung

摘要

Liquid Organic Hydrogen Carriers (LOHC) were an important development direction for diversified hydrogen storage and transportation technologies. Electrochemical in-situ hydrogenation of liquid organic compounds can effectively couple hydrogen production and storage processes, which had important research significance and potential application prospects. This paper used dibenzyltoluene (H0-DBT) as an electrochemical liquid organic in-situ hydrogen storage material, which was a new attempt and provided new ideas for the selection of future electrochemical liquid organic hydrogen storage materials. The research results indicated that in situ electrochemical hydrogenation of H0-DBT was feasible. Through the analysis of cyclic voltammetry and electrochemical impedance spectroscopy, the hydrogenation reduction of H0-DBT on the Ru-Ti-Ir electrode surface was carried out in multiple steps controlled by diffusion. With the increase of temperature, proton donor concentration and H0-DBT concentration, the hydrogenation current density of H0-DBT increased. The hydrogenation products of H0-DBT were intermediate hydrogenation product (H12-DBT) and perhydro-dibenzyltoluene (H18-DBT). The process of hydrogenation from H0-DBT to H12-DBT was faster, while the process of hydrogenation from H12-DBT to H18-DBT was slower.

Graphical Abstract