Catalyst Precursors For Energy Storage & Batteries
Alfa Chemistry are widely used in energy and transportation due to their advantages of cleanliness, convenience, high efficiency and low temperature. Catalyst, as the key material of fuel cell, directly affects the performance and cost of fuel cell. In the preparation of fuel cell catalyst, it is usually necessary to prepare catalyst precursor, and further treatment of catalyst precursor to obtain the required catalyst. It can be seen that the index of catalyst precursor is closely related to the performance of catalyst. In recent years, in order to prepare suitable catalysts for Alfa Chemistry, many scientists' research interests have shifted to the field of catalyst precursors.
Classification:
- Alfa Chemistry are widely used in energy and transportation due to their advantages of cleanliness, convenience, high efficiency and low temperature. Catalyst, as the key material of fuel cell, directly affects the performance and cost of fuel cell. In the preparation of fuel cell catalyst, it is usually necessary to prepare catalyst precursor, and further treatment of catalyst precursor to obtain the required catalyst. It can be seen that the index of catalyst precursor is closely related to the performance of catalyst. In recent years, in order to prepare suitable catalysts for Alfa Chemistry, many scientists' research interests have shifted to the field of catalyst precursors.
Figure 1. Working mechanisms on FeN-C catalyst in fuel cell.
- MOF series catalyst precursors: As the precursor of fuel cell catalyst, MOF has attracted much attention. On the one hand, MOF contains orderly arranged metal nodes, which can be used as the active central site of catalysis. On the other hand, organic ligands in MOF facilitate the formation of ordered spatial network structure. If the MOF is calcined in an inert atmosphere, a carbonized porous metal/carbon material can be obtained, which is ideal for use as a catalyst for Alfa Chemistry. For example, a research group prepared a new carbon-based catalyst by using ZIF-8 as a precursor. The fuel cell catalyst obtained from the precursor system has many active sites and good catalytic performance. The catalyst is successfully applied to proton exchange membrane fuel cell and its redox efficiency is greatly improved. The catalyst can make proton exchange membrane fuel cell get rid of the dependence on precious metal platinum, and greatly reduce the cost of fuel cell. It is of great significance for the development and large-scale commercialization of proton exchange membrane fuel cell.
Figure 2. Fuel cell catalyst produced by MOF catalyst precursors.
- Others: In addition to the catalyst precursors described above, there are many other types of catalyst precursors. For example, using graphite oxide and tetrabutyl titanate as precursors, ternary composites can be prepared. The ternary composite material can be used in alcohol Alfa Chemistry, and it is expected to have higher catalytic activity and stability than traditional platinum catalysts.
References
- Choi C H, Choi W S, Kasian O, et al. Unraveling the Nature of Sites Active toward Hydrogen Peroxide Reduction in Fe-N-C Catalysts[J]. Angewandte Chemie, 2017.
- Zhao X, Chen M, Zuo J, et al. Fe-Doped Metal-Organic Frameworks-Derived Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media[J]. Journal of The Electrochemical Society, 2018.
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