title: Preparation and Catalytic Activity of a Novel Nanocrystalline ZrO2@C Composite for Hydrogen Storage in NaAlH4.
abstract: Sodium alanate (NaAlH4) has attracted intense interest as a prototypical high-density hydrogen-storage material. However, poor reversibility and slow kinetics limit its practical applications. Herein, a nanocrystalline ZrO2@C catalyst was synthesized by using Uio-66(Zr) as a precursor and furfuryl alcohol (FA) as a carbon source. The as-synthesized ZrO2@C exhibits good catalytic activity for the dehydrogenation and hydrogenation of NaAlH4. The NaAlH4-7 wt % ZrO2@C sample released hydrogen starting from 126 °C and reabsorbed it starting from 54 °C, and these temperatures are lower by 71 and 36 °C, respectively, relative to pristine NaAlH4. At 160 °C, approximately 5.0 wt % of hydrogen was released from the NaAlH4-7 wt % ZrO2@C sample within 250 min, and the dehydrogenation product reabsorbed approximately 4.9 wt % within 35 min at 140 °C and 100 bar of hydrogen. The catalytic function of the Zr-based active species is believed to contribute to the significantly reduced operating temperatures and enhanced kinetics.
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.|Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou, 310014, 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.
authors.forename: Ruyan
authors.initials: R
authors.lastname: Wu
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: Zeyi
authors.initials: Z
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: 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
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.|Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin, 300071, China.
authors.forename: Yongfeng
authors.identifier: http://orcid.org/0000-0002-4002-8265
authors.initials: Y
authors.lastname: Liu
keywords: dehydrogenation; doping; hydrides; hydrogen storage; sodium alanate