Full
Outline
MgH2 has become one of the most widely studied hydrogen storage materials due to its high theoretical hydrogen storage capacity， improved safety， and reversibility. However， its application is limited by its high thermodynamic stability and poor kinetic performance. A doping catalyst can effectively reduce the reaction barrier of hydrogen absorption and desorption， thereby accelerating the reaction rate of hydrogenation and dehydrogenation in the Mg-H system. This approach is an effective and simple method to enhance the hydrogen storage performance of MgH2. Transition metals and their oxides have been widely studied because of their excellent catalytic properties. In this review， various types of transition metals and their oxide catalysts are introduced， and their effects on the hydrogenation and dehydrogenation of MgH2 and the catalytic principle are briefly described. Finally， it is concluded that doping with multi-element alloys， multi-component metal oxides， or combinations of metals and metal oxides to utilize the synergistic effects between different metals is an important method for improving catalytic performance. However， the catalytic mechanisms of some transition metals and their oxides remain unclear at present. Deepening the understanding of catalytic mechanisms， especially conducting in-depth investigations at the atomic scale， will provide strong support for the development and application of magnesium-based hydrogen storage materials with better hydrogen storage performance.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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