title: Ultrafine Nanocrystalline CeO2@C-Containing NaAlH4 with Fast Kinetics and Good Reversibility for Hydrogen Storage.
abstract: A nanocrystalline CeO2@C-containing NaAlH4 composite is successfully synthesized in situ by hydrogenating a NaH-Al mixture doped with CeO2@C. Compared with NaAlH4 , the as-prepared CeO2@C-containing NaAlH4 composite, with a minor amount of excess Al, exhibits significantly improved hydrogen storage properties. The dehydrogenation onset temperature of the hydrogenated [NaH-Al-7 wt % CeO2@C]-0.04Al sample is 77 °C lower than that of the pristine sample because of a reduced kinetic barrier. More importantly, the dehydrogenated sample absorbs ∼4.7 wt % hydrogen within 35 min at 100°C and 10 MPa of hydrogen. Compositional and structural analyses reveal that CeO2 is converted to CeH2 during ball milling and that the newly formed CeH2 works with the excess of Al to synergistically improve the hydrogen storage properties of NaAlH4. Our findings will aid in the rational design of novel catalyst-doped complex hydride systems with low operating temperatures, fast kinetics, and long-term cyclability.
authors.affiliation: State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province & School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province & School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China. mselyf@zju.edu.cn.|Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin, 300071, China. mselyf@zju.edu.cn.
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province & School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province & School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
authors.forename: You
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province & School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
authors.forename: Mingxia
authors.initials: M
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province & School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
authors.forename: Hongge
authors.initials: H
authors.lastname: Pan
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002563:Cerium / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D007700:Kinetics; D008958:Models, Molecular; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry*; D017670:Sodium Compounds / Q000737:chemistry*
chemical_list: D017607:Aluminum Compounds; D017670:Sodium Compounds; C513667:sodium aluminum hydride; D002563:Cerium; C030583:ceric oxide; D002244:Carbon; D006859:Hydrogen
keywords: catalyst doping; complex hydrides; hydrides; hydrogen storage; nanocrystalline CeO2@c