Straw turns into gold: electrocatalytic conversion of biomass to achieve green and efficient upgrade
The reporter learned from the Hefei Institute of Material Science of the Chinese Academy of Sciences that important progress has been made in the electrocatalytic conversion of biomass in the solids of the institute, and the green electrocatalytic conversion of furfural, a platform molecule of biomass, has been upgraded. The research results were published in "Applied Catalysis".
Biomass, as an important renewable resource production method, is regarded as an important way to replace fossil energy in the preparation of fuels and chemicals. Among them, cellulose is the most important component of biomass, accounting for 40% -60 of the biomass composition % Is the most abundant non-grain carbohydrate in nature, and its catalytic conversion to produce high value-added chemicals is the key to the sustainable development of human society. How to further convert the platform molecules derived from cellulose to further catalyze and obtain higher value-added chemicals has become a key research direction in the energy field. However, the conversion rate and selectivity of biomass-derived platform molecules are low, and the promotion of biomass platform molecules to a wider range of applications is still a very challenging problem.
Researchers chose the electrocatalytic upgrade reaction of furfural as a model, designed and constructed a carbon fiber cloth supported metal phosphide electrode using a novel gas-phase hydrothermal method, and used the electrode to assemble a furfural electrocatalytic conversion system to achieve high selectivity and High Faraday efficiency, high current density furfural hydrogenation reduction conversion to furfuryl alcohol, oxidative conversion to furoic acid; by isotope labeling method, it is directly proved that the hydrogen for furfural electrocatalytic hydrogenation is derived from hydrogen atoms in water. In addition, the researchers also explored the mechanism of efficient electrocatalytic hydrogenation of furfural through density functional theory calculations. The results show that the catalytic system has a higher concentration of adsorbed hydrogen atoms and a higher hydrogen desorption energy, which inhibits electrocatalysis Hydrogen evolution process, thus achieving its selectivity for furfural electrocatalytic hydrogenation.
The research results not only have guiding significance on how to design high catalytic activity and high selectivity electrocatalytic transfer hydrogenation catalysts, but also have important guiding value on the design and construction of electrocatalytic organic synthesis systems. (Reporter Wu Changfeng)
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