Recently, Wang Aiqin, a researcher in the aerospace catalysis and new materials laboratory of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Zhang Tao, a member of the Chinese Academy of Sciences, have made new progress in the research of biomass catalytic conversion, and developed a multi-functional Mo / Pt / WOx catalyst Vegetarian "one pot" is efficiently converted into ethanol. Related work was published in Joule.
As the most abundant biomass resource in nature, cellulose can be derived from a large amount of agricultural and forestry waste. Its inedible characteristics make it an ideal renewable carbon resource for the production of fuels and chemicals. Cellulose ethanol is the most important biofuel one. However, so far, the use of biological fermentation technology to produce cellulose ethanol still faces various technical and economic challenges. In view of this, it is of great significance to explore a non-biological conversion route to produce cellulose ethanol.
The team of Zhang Tao and Wang Aiqin has been devoted to the research on the selective cleavage of CC and CO bonds in biomass to prepare important small molecule alcohols. The team pioneered the catalytic conversion of hydrogenolysis of cellulose to ethylene glycol (Angew. Chem. Int. Ed., 2008; Acc. Chem. Res., 2013) and found that compounds containing tungsten (W) catalyzed cellulose The unique role of the CC bond selective cleavage reaction, and proposed a two-step method for cellulose to be produced by oxidative esterification followed by hydrogenation reduction (ChemSusChem, 2017; Green Chem., 2018).
On this basis, they combined with the catalyst research of 1,3-propanediol hydrogenation of glycerol (ChemSusChem, 2016; ChemSusChem, 2017), and proposed a new multi-functional Mo / Pt / WOx catalyst to hydrogenate cellulose Ethylene glycol and glycol hydrogenolysis to produce ethanol are ingeniously coupled to realize the process of direct hydrogenolysis of cellulose to produce ethanol, and the carbon yield of ethanol reaches 43.2%. At the same time, the catalyst also showed excellent stability and anti-CO poisoning performance, making it have greater potential in future practical applications. Through a variety of spectral characterizations, the research team proposed the 5OMo-Pt-WOx active site structure as shown in the figure, in which MoO5 presents a monodisperse form of coordinated unsaturated, which interacts with the nano-Pt surface to modulate Pt -WOx electronic interactions promote the hydrogenolysis of ethylene glycol to ethanol.
The above-mentioned research work was supported by the National Natural Science Foundation of China, the Ministry of Science and Technology, and the Chinese Academy of Sciences.
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