Hydrogen is a kind of clean renewable energy source with high energy density, but its storage and transportation have been the bottleneck hindering the large-scale application of hydrogen energy. The scientific team led by the School of Chemistry and Molecular Engineering of Peking University used platinum-molybdenum bi-functional catalysts to achieve efficient activation of water and methanol, and achieved extremely high hydrogen production efficiency at low temperatures. It is said that this catalytic system is expected to be used as the next generation of a new system for efficient storage and release of hydrogen.
Hydrogen fuel cells are currently one of the most promising new generation energy supply systems. They convert chemical energy into electrical energy and are widely used in aerospace, automotive and other fields. Due to the active hydrogen chemistry, the storage of hydrogen becomes the key to hydrogen fuel cell applications. However, hydrogen storage and transportation technology still has problems such as poor security, high price, and limited storage capacity.
In response to these deficiencies, one possible solution is to store hydrogen in liquid methanol, release hydrogen through the reaction of water and methanol for use in a fuel cell, release hydrogen stored in methanol, and also activate equimolar water to release Extra hydrogen.
To this end, the Martin Research Group of the School of Chemistry and Molecular Engineering of Peking University has teamed up with researchers from the University of Chinese Academy of Sciences, the Shanxi Coal Chemistry Research Institute of the Chinese Academy of Sciences, Dalian University of Technology, and others to use platinum for the characteristics of liquid-phase hydrogen production from methanol and water. - Molybdenum carbide dual-function catalyst achieves efficient activation of water and methanol.
The research team found that the platinum catalyst supported by molybdenum carbide was applied to the liquid-phase reaction of methanol and water. As the temperature increased, the catalyst exhibited a super high hydrogen production activity, which was improved by nearly two orders of magnitude compared with the conventional catalyst. With hydrogen production activity estimated, the catalyst has basically reached the demand for commercial vehicle-mounted fuel cell stacks, and only 6 grams of platinum can make the hydrogen production rate reach 1 kilogram of hydrogen per hour.
The researchers estimated that using the current path of the methanol market price of 2,600 yuan per ton per ton to store and release hydrogen, the hydrogen fuel cell vehicle fuel price per 100 kilometers is only about 14 yuan, while the addition of 60 liters to 80 liters of methanol is available. The family car travels 600 kilometers to 1,000 kilometers.
It is reported that the research results have been applied for patents and published in the journal Nature recently. The research work has established a new system of chemical efficient hydrogen storage and storage, which provides a new idea for the storage and transportation of hydrogen energy using methanol as a hydrogen storage medium. According to Matthias Bayle, director of the Leibniz Catalysis Institute in Germany, this research is a “major breakthrough†in the field of hydrogen storage and transportation. Such catalysts are also expected to be used in the reforming of other aqueous phases. Processes, such as domestic wastewater, ethanol and other raw materials, play a dominant role in the catalytic hydrogen production. (Reporter Wei Mengjia)
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