首页|Single Ti atoms coupled with Ti-O clusters enable low temperature hydrogen cycling by sodium alanate

Single Ti atoms coupled with Ti-O clusters enable low temperature hydrogen cycling by sodium alanate

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Ti-based catalysts are known to improve the hydrogen storage performance of NaAlH4 by facilitating the dissociation/recombination of H-H and Al-H bonds.The catalytic activity of metallic Ti species strongly depends on its particle size and dispersity.Ti clusters and even single atoms are therefore highly desirable,but their controllable fabrication has been highly challenging.Herein,we demonstrate a novel facile sonochemical syn-thesis of a Ti-O clusters featuring single Ti atom catalyst at room temperature.Through reducing TiCl4 by MgBu2 with ultrasound instead of heating as driving force,numerous single Ti atoms coupled with Ti-O clusters with Ti loading on graphene(Ti1/Ti-O@G)up to 22.6 wt％have been successfully obtained.The prepared Ti1/Ti-O@G con-tributes high reactivity and superior catalytic activity,therefore enabling full dehydrogenation of NaAlH4 at 80 ℃ in thermogravimetric mode and re-hydrogenation at 30 ℃ and 10 MPa with 4.9 wt％H2.This fact indicates for the first time that single Ti atom catalyst with high loading is highly effective in catalyzing hydrogen cycling of NaAlH4 at remarkably reduced temperatures.

Hydrogen storageNanocatalysisTransition metalsSingle Ti atomsNaAlH4

Zhuang-He Ren、Xin Zhang、Wen-Xuan Zhang、Zhen-Guo Huang、Li-Mei Yang、Ya-Xiong Yang、Zheng-Long Li、Juan Li、Wen-Ping Sun、Ming-Xia Gao、Hong-Ge Pan、Yong-Feng Liu

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State Key Laboratory of Silicon and Advanced Semiconductor Materials,Zhejiang University,Hangzhou 310027,China

School of Materials Science and Engineering,Zhejiang University,Hangzhou 310058,China

School of Civil & Environmental Engineering,University of Technology Sydney,Sydney,2007 NSW,Australia

Institute of Science and Technology for New Energy,Xi'an Technological University,Xi'an 710021,China

College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China

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National Outstanding Youth Foundation of China浙江省自然科学基金国家自然科学基金国家自然科学基金中央高校基本科研业务费专项中央高校基本科研业务费专项National Youth Top-Notch Talent Support Program

52125104LD21E01000252071285520012772021FZZX001-09226-2022-00246

2024

10.1007/s12598-023-02608-2

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(6)
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