首页|Facile construction of Mxene-supported niobium hydride nanoparticles toward reversible hydrogen storage in magnesium borohydride

Facile construction of Mxene-supported niobium hydride nanoparticles toward reversible hydrogen storage in magnesium borohydride

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The facile construction of nanoscale NbHx supported by Ti3C2(NbHx@Ti3C2)was achieved using facile ball milling strategy to improve the hydrogen des-orption kinetics and reversibility of magnesium borohy-dride(Mg(BH4)2).The doping of 30 wt％NbHx@Ti3C2 catalyst reduced the onset dehydrogenation temperature of Mg(BH4)2 to 71.2 ℃.Additionally,the Mg(BH4)2+30 NbHx@Ti3C2 composite achieved remarkable hydrogen release of over 9.2 wt％at a temperature as low as 230 ℃,indicating unexpected dehydrogenation kinetics.Moreover,the reversibility of NbHx@Ti3C2 doped Mg(BH4)2 was retained to more than 4.2 wt％after four cycles,which was increased by 68％compared to that of undoped Mg(BH4)2.The strong catalysis of NbHx@Ti3C2 catalyst could be attributed to the synergistic effect of NbHx and Ti3C2 in hydrogen spillover and diffusion.NbHx acted as a"hydrogen pump"for effective hydrogen spillover,while Ti3C2 created numerous diffusion channels for hydrogen dissolution and provided the active catalytic site to facili-tate the re/dehydrogenation of Mg(BH4)2.

Hydrogen storageMagnesium borohydrideCatalystsMxene

Ao Xia、Jia-Guang Zheng、Qing-Bo Zhang、Yu-Gang Shu、Cheng-Guo Yan、Liu-Ting Zhang、Zhan-Liang Tao、Li-Xin Chen

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School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China

School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212003,China

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education),Nankai University,Tianjin 300071,China

Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin 300071,China

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

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National Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu ProvinceInnovation and Entrepreneurship Program of Jiangsu Province

52201255BK20210884JSSCBS20211007

2024

10.1007/s12598-024-02728-3

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(9)
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