A noteworthy synergistic catalysis on hydrogen sorption kinetics of MgH 2 with bimetallic oxide Sc 2 O 3 /TiO 2
A noteworthy synergistic catalysis on hydrogen sorption kinetics of MgH 2 with bimetallic oxide Sc 2 O 3 /TiO 2
复制标题
MgH 2 与双金属氧化物Sc 2 O 3 /TiO 2 氢吸附动力学的值得注意的协同催化
DOI：
10.1016/j.jallcom.2020.155387
复制
发表时间：
2020-10-25
影响因子：
6.2
通讯作者：
Wu, Y.
中科院分区：
文献类型：
--
作者：
Huang, H. X.;Yuan, J. G.;Wu, Y.
多相催化对氢化镁储氢性能的积极影响已被大量研究者所认识。本文采用简便的方法合成了一种具有显著协同催化作用的氧化物催化剂Sc_2O_3/TiO_2。在MgH 2中加入5wt%Sc2O3/TiO 2催化剂，可显著提高MgH 2的储氢性能。在200 °C下，在3000 s内吸收6.08wt%H2，在300 °C下，在1000 s内释放6.21wt%H2，远优于Mg/MgH 2。这种优异的催化性能是由于双金属氧化物的协同催化作用。EDS分析表明，Sc和Ti的均匀分布有利于Mg颗粒表面的协同催化作用。该研究进一步证实了多相协同催化的主动性，并为催化剂的选择和设计提供了启示。
The positive effect of heterogeneous catalysis on hydrogen storage performance of magnesium hydride (MgH2) has been recognized by a large number of researchers. In the present paper, a bimetallic oxide catalyst Sc2O3/TiO2with noteworthy synergistic catalysis is synthesized by a facile method. A significant enhancement of hydrogen storage performance is achieved when 5 wt% Sc2O3/TiO2catalyst is added into MgH2. It absorbs 6.08 wt% H2within 3000 s at 200 °C and releases 6.21 wt% H2within 1000 s at 300 °C, which is far better than that of Mg/MgH2. The excellent performance is attributed to the synergistic catalysis of bimetallic oxides. The uniform distribution of Sc and Ti evidenced by EDS is beneficial to the synergistic catalytic effect on the surface of Mg particles. This study further confirms the initiative of multi-phase synergistic catalysis and provides insights for the selection and design of catalysts.