Advanced heterolytic H_(2) adsorption of K-added Ru/MgO catalysts for accelerating hydrogen storage into aromatic benzyltoluenes

作     者：Tae Wan Kim Hwiram Jeong Yeongin Jo Dongun Kim Ji Hoon Park Seok Ki Kim Young-Woong Suh Tae Wan Kim;Hwiram Jeong;Yeongin Jo;Dongun Kim;Ji Hoon Park;Seok Ki Kim;Young-Woong Suh

作者机构：Department of Chemical EngineeringHanyang UniversitySeoul 04763Republic of Korea Environmental&Sustainable Resources Research CenterKorea Research Institute of Chemical TechnologyDaejeon 34114Republic of Korea Department of Chemical EngineeringAjou UniversitySuwon 16499Republic of Korea 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第8期

页      面：333-343,I0009页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT,Republic of Korea(2019M3E6A1064908) the Ministry of Education,Republic of Korea(2016R1A6A1A03013422) 

主　　题：Chemical hydrogen storage Supported Ru catalysts Ru–MgO interface Heterolytic H_(2)adsorption Charge transfer Potassium promotion 

摘      要：Herein,we report a highly active K-added Ru/MgO catalyst for hydrogen storage into aromatic benzyltoluenes at low temperatures to advance liquid organic hydrogen carrier *** hydrogenation activity of Ru/K/MgO catalysts exhibits a volcano-shaped dependence on the K content at the maximum with 0.02 wt%.This is in good agreement with the strength and capacity of H_(2) adsorption derived from basicity,despite a gradual decrease in the textural property and the corresponding increase in the Ru particle size with increasing the K *** functional theory calculations show that heterolytic hydrogen adsorption properties(strength and polarization)are facilitated up to a specific density of K on the Ru–MgO interface and excessive K suppresses heterolytic H_(2) adsorption by direct interaction between K and hydrogen,assuring the hydrogenation activity and H_(2) adsorption capability of Ru/K/MgO ***,the Ru/K/MgO catalyst,when K is added in an optimal amount,is highly effective to accelerate hydrogen storage kinetics at low temperatures owing to the enhanced heterolytic H_(2) adsorption.