Photocatalytic biomass conversion is an ideal way of generating syngas (H2 and CO) via C-C bond cleavage, which is initiated by hydrogen abstraction of.
Credit: DICP
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Photocatalytic biomass conversion is an ideal way of generating syngas (H
2 and CO) via C-C bond cleavage, which is initiated by hydrogen abstraction of O/C-H bond. However, the lack of efficient electron-proton transfer limits its efficiency. Conversional gasification of biomass into syngas needs to be operated at high temperature (400-700 °C).
Recently, a group led by Prof. WANG Feng from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS), in collaboration with Prof. WANG Min from Dalian University of Technology, proposed a new method to realize photocatalytic conversion of biopolyols to syngas at room temperature with high efficiency.
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IMAGE: Dalian Coherent Light Source revealing three-body photodissociation of water as an important prebiotic-O2 source view more
Credit: DICP
The provenance of oxygen on Earth and other solar planetary bodies is a fundamental issue. It is widely accepted that the prebiotic pathway of oxygen production in the Earth primitive atmosphere was via vacuum ultraviolet (VUV) photodissociation of CO
2 and subsequent recombination of two O atoms.
In contrast, the photodissociation of H2O, one of the dominant oxygen carriers, has long been assumed to proceed mainly to produce hydroxyl (OH)- and hydrogen (H)-atom primary products, and its contribution to oxygen production is limited.
Chinese Academy of Sciences
Nicotinamide adenine dinucleotide (NAD), an indispensable cofactor in cells, participates in diverse redox biochemistry and other nonredox processes. NAD level variation leads to global yet difficult-to-predict biological responses.
A research team led by Prof. ZHAO Zongbao from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences has committed to developing non-natural cofactor-based systems to avoid the limitation associated with NAD level fluctuation.
The team has designed a non-natural coenzyme nicotinamide cytosine dinucleotide (NCD), and engineered a series of oxidoreductases. However, it’s still challenging for microbial cells to take NCD from the environment.
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