Radical and (photo)electron transfer induced mechanisms for lignin photo- and electro-catalytic depolymerization
Radical and (photo)electron transfer induced mechanisms for lignin photo- and electro-catalytic depolymerization
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木质素光催化和电催化解聚的自由基和（光）电子转移诱导机制
DOI：
10.1016/j.gee.2022.02.011
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发表时间：
2022-02
期刊：
影响因子：
--
通讯作者：
Xuehui Li
中科院分区：
文献类型：
--
作者：
Kejia Wu;Minglong Cao;Qiang Zeng;Xuehui Li
木质素是木质生物质的三大组成成分之一，是一种天然有机聚合物，也是唯一丰富的具有芳香核的天然可再生资源。化学催化解聚是木质素利用的重要而有效的途径。特别是光催化和电催化在准确激活C-O / C-C键方面显示出巨大的潜力，这是木质素选择性裂解的关键点。在这篇贡献中，我们重点研究了自由基和（光）电子转移诱导的光（电）催化木质素解聚的反应机理。本文首先讨论了碳中心自由基和活性氧介导木质素转化的概况。总结了光电子转移介导木质素解聚的机理。最后，展望了光（电）催化在木质素增值应用中的挑战和机遇。
As one of the three major components of woody biomass, lignin is a kind of natural organic polymer and the only abundant natural renewable resource with aromatic nucleus. Chemical catalysis induced depolymerization is an important and effective approach for lignin utilization. In particular, photocatalysis and electrocatalysis show great potential in accurately activating C–O/C–C bonds, which is a critical point of selective cleavage of lignin. In this contribution, we focus on radical and (photo)electron transfer induced reaction mechanisms of the photo(electro)catalytic depolymerization of lignin. Primarily, the general situation of Carbon-centered radicals and active oxygen species mediated lignin conversion has been discussed. Then the mechanisms for (photo)electron transfer mediated lignin depolymerization have been summarized. At the end of this review, the challenges and opportunities of photo(electro)catalysis in the applications of lignin valorization have been forecasted.
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