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Preparation and Catalytic Activity of a Novel Nanocrystalline ZrO 2 @C Composite for Hydrogen Storage in NaAlH 4
Author(s) -
Zhang Xin,
Wu Ruyan,
Wang Zeyi,
Gao Mingxia,
Pan Hongge,
Liu Yongfeng
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201601204
Subject(s) - dehydrogenation , hydrogen storage , catalysis , nanocrystalline material , furfuryl alcohol , materials science , hydrogen , kinetics , nuclear chemistry , composite number , inorganic chemistry , chemical engineering , chemistry , organic chemistry , nanotechnology , physics , composite material , quantum mechanics , engineering
Sodium alanate (NaAlH 4 ) 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 ZrO 2 @C catalyst was synthesized by using Uio‐66(Zr) as a precursor and furfuryl alcohol (FA) as a carbon source. The as‐synthesized ZrO 2 @C exhibits good catalytic activity for the dehydrogenation and hydrogenation of NaAlH 4 . The NaAlH 4 ‐7 wt % ZrO 2 @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 NaAlH 4 . At 160 °C, approximately 5.0 wt % of hydrogen was released from the NaAlH 4 ‐7 wt % ZrO 2 @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.