Improved Oxidative Cleavage of Lignin Model Compound by ORR in Protic Ionic Liquid
Improved Oxidative Cleavage of Lignin Model Compound by ORR in Protic Ionic Liquid
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DOI：
10.20964/2019.03.10
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发表时间：
2019-03
影响因子：
1.5
通讯作者：
Haomin Jiang
中科院分区：
文献类型：
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作者：
Haomin Jiang
在无膜电池中采用氧还原反应（ORR）阴极研究了对苯氧氧基苯酚（PBP）在[HNEt 3][hso4]中的电化学降解。揭示了o2（即h2o2）的双电子还原产物是质子离子液体（PIL） [HNEt 3][hso4]中的主要活性氧（ROS）。在PIL中对PBP的降解率为48.2%，电流效率为29.5%，高于在[BMIM][BF 4]非质子离子液体（AIL）中的降解率。根据气相色谱-质谱鉴定的产物，提出了电生成h2o2对PBP中醚键断裂的影响。研究结果证实，在木质素模型化合物的电化学降解过程中，支持电解质中适当的质子数对木质素模型化合物起着重要的作用。
The electrochemical degradation of p -benzyloxyl phenol (PBP) in [HNEt 3 ][HSO 4 ] is investigated using an oxygen reductive reaction (ORR) cathode in a non-membrane cell. It is disclosed that the two-electron reductive products of O 2 (that is H 2 O 2 ) is the main reactive oxygen species (ROS) in [HNEt 3 ][HSO 4 ], a protic ionic liquid (PIL). The degradation of PBP in PIL with the degradation rate of 48.2% and the current efficiency of 29.5% are obtained, which is higher than that in [BMIM][BF 4 ], an aprotic ionic liquid (AIL). Based on the products identified by GC-MS, the effect of electro-generated H 2 O 2 on the cleavage of ether bond in PBP is proposed. The result confirms that the appropriate number of protons in supporting electrolyte plays an important role in electrochemical degradation of lignin model compounds.