Aluminum hydride is a promising chemical hydrogen storage material that can achieve dehydrogenation under mild conditions as well as high hydrogen storage capacity.However,designing an efficient and cost-effective cat...Aluminum hydride is a promising chemical hydrogen storage material that can achieve dehydrogenation under mild conditions as well as high hydrogen storage capacity.However,designing an efficient and cost-effective catalyst,especially a synergistic catalyst,for realizing low-temperature and high-efficiency hydrogen supply remains challenging.In this study,the heterojunction synergistic catalyst of Ti_(3)C_(2)supported PrF_(3)nanosheets considerably improved the dehydrogenation kinetics of AlH_(3)at low temperatures and maintained a high hydrogen storage capacity.In the synergistic catalyst,Pr produced a synergistic coupling interaction through its unique electronic structure.The sandwich structure with close contact between the two phases enhanced the interaction between species and the synergistic effect.The initial dehydrogenation temperature of the composite is reduced to 70.2℃,and the dehydrogenation capacity is 8.6 wt.%at 120℃ in 90 min under the kinetic test,which reached 93%of the theoretical hydrogen storage capacity.The catalyst considerably reduced the activation energy of the dehydrogenation reaction.Furthermore,the multielectron pairs on the surface of the catalyst promoted electron transfer and accelerated the reaction.展开更多
基金The authors acknowledged the National Key Research and Development Program of China(No.2021YFB4000604)Key R&D projects of Jilin Provincial Science and Technology Development Plan(Nos.20230201125GX,20230201140GX,and 20200401039GX)+4 种基金Special fund of Scientific and Technological Cooperation Program between Jilin Province and Chinese Academy of Sciences(No.2021SYHZ0045)Jilin Scientific and Technological Development Program(No.20200401039GX)State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization(No.2021H2270)Youth Innovation Promotion Association CAS(No.2021225)Youth Growth Science and Technology Program of Jilin Province(No.20220508001RC).
文摘Aluminum hydride is a promising chemical hydrogen storage material that can achieve dehydrogenation under mild conditions as well as high hydrogen storage capacity.However,designing an efficient and cost-effective catalyst,especially a synergistic catalyst,for realizing low-temperature and high-efficiency hydrogen supply remains challenging.In this study,the heterojunction synergistic catalyst of Ti_(3)C_(2)supported PrF_(3)nanosheets considerably improved the dehydrogenation kinetics of AlH_(3)at low temperatures and maintained a high hydrogen storage capacity.In the synergistic catalyst,Pr produced a synergistic coupling interaction through its unique electronic structure.The sandwich structure with close contact between the two phases enhanced the interaction between species and the synergistic effect.The initial dehydrogenation temperature of the composite is reduced to 70.2℃,and the dehydrogenation capacity is 8.6 wt.%at 120℃ in 90 min under the kinetic test,which reached 93%of the theoretical hydrogen storage capacity.The catalyst considerably reduced the activation energy of the dehydrogenation reaction.Furthermore,the multielectron pairs on the surface of the catalyst promoted electron transfer and accelerated the reaction.
