Crystal-facet-dependent catalysis of anatase TiO2 on hydrogen storage of MgH2

Zhongliang Ma, Jiangchuan Liu, Yunfeng Zhu, Yingyan Zhao, Huaijun Lin, Yao Zhang, Haiwen Li, Jiguang Zhang, Yana Liu, Wentian Gao, Shanshan Li, Liquan Li

Research output: Contribution to journalArticle

Abstract

Various catalysts are developed to enhance the hydrogen storage performances of magnesium based hydride. In particular, the morphology of catalysts governs their surface energy and chemical interactions with Mg and hydrogen, which makes it possible to adjust the hydrogen reaction kinetics of MgH2 through morphological design of the catalysts. Here, we report a novel crystal-facet-dependent catalysis of TiO2 on hydrogen storage of MgH2. Different facets dominant anatase TiO2 (named TFx, x = 0, 10, 30, 50, 70 and 80) are prepared via a hydrothermal synthesis approach and then doped into MgH2 via ball milling. Results show anatase TiO2 with high percentage {001} facets has much better catalytic effect than that with low percentage {001} facets. The MgH2-TF70 exhibits the best hydrogen sorption kinetics, showing apparent activation energy for dehydriding of only 76.1 ± 1.6 kJ mol−1. The present study constructs a new bridge between the catalytic effect of catalysts with different crystal facets and the hydrogen storage property of MgH2.

Original languageEnglish
Article number153553
JournalJournal of Alloys and Compounds
Volume822
DOIs
Publication statusPublished - May 5 2020

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Hydrogen storage
Titanium dioxide
Catalysis
Hydrogen
Crystals
Catalysts
Hydrothermal synthesis
Ball milling
Interfacial energy
Hydrides
Reaction kinetics
Magnesium
Sorption
Activation energy
Kinetics
titanium dioxide

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Crystal-facet-dependent catalysis of anatase TiO2 on hydrogen storage of MgH2. / Ma, Zhongliang; Liu, Jiangchuan; Zhu, Yunfeng; Zhao, Yingyan; Lin, Huaijun; Zhang, Yao; Li, Haiwen; Zhang, Jiguang; Liu, Yana; Gao, Wentian; Li, Shanshan; Li, Liquan.

In: Journal of Alloys and Compounds, Vol. 822, 153553, 05.05.2020.

Research output: Contribution to journalArticle

Ma, Z, Liu, J, Zhu, Y, Zhao, Y, Lin, H, Zhang, Y, Li, H, Zhang, J, Liu, Y, Gao, W, Li, S & Li, L 2020, 'Crystal-facet-dependent catalysis of anatase TiO2 on hydrogen storage of MgH2', Journal of Alloys and Compounds, vol. 822, 153553. https://doi.org/10.1016/j.jallcom.2019.153553
Ma, Zhongliang ; Liu, Jiangchuan ; Zhu, Yunfeng ; Zhao, Yingyan ; Lin, Huaijun ; Zhang, Yao ; Li, Haiwen ; Zhang, Jiguang ; Liu, Yana ; Gao, Wentian ; Li, Shanshan ; Li, Liquan. / Crystal-facet-dependent catalysis of anatase TiO2 on hydrogen storage of MgH2. In: Journal of Alloys and Compounds. 2020 ; Vol. 822.
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AU - Zhang, Yao

AU - Li, Haiwen

AU - Zhang, Jiguang

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AB - Various catalysts are developed to enhance the hydrogen storage performances of magnesium based hydride. In particular, the morphology of catalysts governs their surface energy and chemical interactions with Mg and hydrogen, which makes it possible to adjust the hydrogen reaction kinetics of MgH2 through morphological design of the catalysts. Here, we report a novel crystal-facet-dependent catalysis of TiO2 on hydrogen storage of MgH2. Different facets dominant anatase TiO2 (named TFx, x = 0, 10, 30, 50, 70 and 80) are prepared via a hydrothermal synthesis approach and then doped into MgH2 via ball milling. Results show anatase TiO2 with high percentage {001} facets has much better catalytic effect than that with low percentage {001} facets. The MgH2-TF70 exhibits the best hydrogen sorption kinetics, showing apparent activation energy for dehydriding of only 76.1 ± 1.6 kJ mol−1. The present study constructs a new bridge between the catalytic effect of catalysts with different crystal facets and the hydrogen storage property of MgH2.

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