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Kim, Yong Hwan
School of Energy and Chemical Engineering
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  • 바이오촉매 생물 전환 생물환경

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Lignin-fueled photoelectrochemical platform for light-driven redox biotransformation

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Title
Lignin-fueled photoelectrochemical platform for light-driven redox biotransformation
Author
Wang, DingLee, Sahng HaHan, SeunghyunKim, JinhyunTrang, Nguyen Vu ThienKim, KayoungChoi, Eun-GyuBoonmongkolras, PassarutLee, Yang WooShin, ByunghaKim, Yong HwanPark, Chan Beum
Issue Date
2020-08
Publisher
ROYAL SOC CHEMISTRY
Citation
GREEN CHEMISTRY, v.22, no.15, pp.5151 - 5160
Abstract
The valorization of lignin has significant potential in producing commodity chemicals and fuels from renewable resources. However, the catalytic degradation of lignin is kinetically challenging and often requires noble metal catalysts to be used under harsh and toxic conditions. Here, we report the bias-free, solar reformation of lignin coupled with redox biotransformation in a tandem structure of a BiVO(4)photoanode and perovskite photovoltaic. The tandem structure compensates for the potential gap between lignin oxidation and biocatalytic reduction through artificialZ-schematic absorption. We found that the BiVO4-catalyzed photoelectrochemical oxidation of lignin facilitated the fragmentation of higher molecular weight lignin into smaller carboxylated aliphatic and aromatic acids. Lignin oxidation induced photocurrent generation at the photoanode, which enabled efficient electroenzymatic reactions at the cathode. This study successfully demonstrates the oxidative valorization of lignin as well as biocatalytic reductions (e.g., CO2-to-formate and alpha-ketoglutarate-to-l-glutamate) in an unbiased biocatalytic PEC platform, which provides a new strategic approach for photo-biocatalysis using naturally abundant renewable resources.
URI
https://scholarworks.unist.ac.kr/handle/201301/47383
URL
https://pubs.rsc.org/en/content/articlelanding/2020/GC/D0GC01521K#!divAbstract
DOI
10.1039/D0GC01521K
ISSN
1463-9262
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