{"title":"Electrocatalytic Lignin Valorization via Enhanced H₂O₂ Generation Using a MWNCT-Modified Gas Diffusion Electrode.","authors":"Lei Wang, Shuangyan Liu, Jinyou Meng, Meng Song, Mingli Jiao, Haomin Jiang, Yongmei Chen","doi":"10.1002/cplu.202400769","DOIUrl":null,"url":null,"abstract":"<p><p>The electrocatalytic valorization of lignin provides a sustainable route to valuable chemicals under mild conditions, yet achieving high efficiency and selectivity remains challenging. Here, we develop gas diffusion electrodes (GDEs) modified with few-layer graphene (GR) and multi-walled carbon nanotubes (MWCNT) to enhance the oxygen reduction reaction (ORR) for efficient hydrogen peroxide (H2O2) generation. The MWCNT-modified GDE exhibits the highest surface area and conductivity, achieving over 80% selectivity for H2O2 via the two-electron ORR pathway. Electrochemical lignin depolymerization using this optimized GDE yields 72.3% low-molecular-weight aromatic compounds within 1 h. The MWCNT-GDE demonstrates exceptional durability, maintaining stable performance across ten consecutive cycles. This work highlights the potential of MWCNT-modified electrodes to advance scalable electrochemical lignin valorization through in-situ H2O2 generation.</p>","PeriodicalId":148,"journal":{"name":"ChemPlusChem","volume":" ","pages":"e202400769"},"PeriodicalIF":3.0000,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemPlusChem","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1002/cplu.202400769","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The electrocatalytic valorization of lignin provides a sustainable route to valuable chemicals under mild conditions, yet achieving high efficiency and selectivity remains challenging. Here, we develop gas diffusion electrodes (GDEs) modified with few-layer graphene (GR) and multi-walled carbon nanotubes (MWCNT) to enhance the oxygen reduction reaction (ORR) for efficient hydrogen peroxide (H2O2) generation. The MWCNT-modified GDE exhibits the highest surface area and conductivity, achieving over 80% selectivity for H2O2 via the two-electron ORR pathway. Electrochemical lignin depolymerization using this optimized GDE yields 72.3% low-molecular-weight aromatic compounds within 1 h. The MWCNT-GDE demonstrates exceptional durability, maintaining stable performance across ten consecutive cycles. This work highlights the potential of MWCNT-modified electrodes to advance scalable electrochemical lignin valorization through in-situ H2O2 generation.
期刊介绍：
ChemPlusChem is a peer-reviewed, general chemistry journal that brings readers the very best in multidisciplinary research centering on chemistry. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies.
Fully comprehensive in its scope, ChemPlusChem publishes articles covering new results from at least two different aspects (subfields) of chemistry or one of chemistry and one of another scientific discipline (one chemistry topic plus another one, hence the title ChemPlusChem). All suitable submissions undergo balanced peer review by experts in the field to ensure the highest quality, originality, relevance, significance, and validity.
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