Remarkable Synergistic Catalysis of Ni-Doped Ultrafine TiO2 on Hydrogen Sorption Kinetics of MgH2
Remarkable Synergistic Catalysis of Ni-Doped Ultrafine TiO2 on Hydrogen Sorption Kinetics of MgH2
复制标题
Ni掺杂超细TiO2对MgH2吸氢动力学的显着协同催化作用
DOI：
10.1021/acsami.8b06865
复制
发表时间：
2018
影响因子：
9.5
通讯作者：
Li Liquan
中科院分区：
文献类型：
--
作者：
Zhang Jiguang;Shi Rui;Zhu Yunfeng;Liu Yana;Zhang Yao;Li Shanshan;Li Liquan
催化剂在加速金属-氢系统中的氢吸附速率方面发挥着极其重要的作用。在此，我们报告了金属-金属氧化物助催化剂对 MgH2 氢吸附性能的惊人协同增强：仅将 5 wt% 的 Ni 掺杂到超细 TiO2 中，就能显着提高氢解吸动力学；即使在 50 °C 的低温下，它也能吸收 4.50 wt% 的氢气。这种显着的改进部分归因于特殊的 Ni@TiO2 核壳结构的形成，从而形成了多功能界面。这项研究为储氢和其他能源相关领域的高效催化剂的设计方式提供了见解。
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 TiO2enables 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@TiO2core–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.