Remarkable Synergistic Catalysis of Ni-Doped Ultrafine TiO2 on Hydrogen Sorption Kinetics of MgH2

Jiguang Zhang; Rui Shi; Yunfeng Zhu; Yana Liu; Yao Zhang; Shanshan Li; Liquan Li

doi:10.1021/acsami.8b06865

Remarkable Synergistic Catalysis of Ni-Doped Ultrafine TiO₂ on Hydrogen Sorption Kinetics of MgH₂

ACS Appl Mater Interfaces. 2018 Aug 1;10(30):24975-24980. doi: 10.1021/acsami.8b06865. Epub 2018 Jul 23.

Authors

Jiguang Zhang^{1

2}, Rui Shi^{1

2}, Yunfeng Zhu^{1

2}, Yana Liu^{1

2}, Yao Zhang³, Shanshan Li^{1

2}, Liquan Li^{1

2}

Affiliations

¹ College of Materials Science and Engineering , Nanjing Tech University , 5 Xinmofan Road , Nanjing 210009 , P.R. China.
² Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites , Nanjing Tech University , Nanjing 210009 , P.R. China.
³ School of Materials Science and Engineering , Southeast University , Nanjing 211189 , P.R. China.

PMID: 30027734
DOI: 10.1021/acsami.8b06865

Abstract

Catalysts play an extraordinarily important role in accelerating the hydrogen sorption rates in metal-hydrogen systems. Herein, we report a surprisingly synergetic enhancement of metal-metal oxide cocatalyst on the hydrogen sorption properties of MgH₂: only 5 wt % doping of Ni into ultrafine TiO₂ enables a significant increase in hydrogen desorption kinetics; it absorbs 4.50 wt % hydrogen even at a low temperature of 50 °C. The striking improvement is partially ascribed to the formation of a particular Ni@TiO₂ core-shell structure, thereby forming versatile interfaces. This study provides insights into the way of designing high-efficiency catalysts in hydrogen storage and other energy-related fields.

Keywords: Mg hydride; catalyst; core−shell structure; hydrogen sorption kinetics; synergetic effect.