Fan Mengmeng, Xu Jing, Wang Yan, Yuan Qixin, Zhao Yuying, Wang Zeming, Jiang Jianchun
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, 210037, Nanjing, China.
Key Lab of Biomass Energy and Material of Jiangsu Province, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, 16 Suojin Wucun Road, 210042, Nanjing, China.
Chemistry. 2022 Oct 26;28(60):e202201996. doi: 10.1002/chem.202201996. Epub 2022 Aug 25.
Oxygen species functionalized graphene (O-G) is an effective electrocatalyst for electrochemically synthesizing hydrogen peroxide (H O ) by a 2 e oxygen reduction reaction (ORR). The type of oxygen species and degree of carbon crystallinity in O-G are two key factors for the high catalytic performance of the 2 e ORR. However, the general preparing method of O-G by the precursor of graphite has the disadvantages of consuming massive strong oxidant and washing water. Herein, the biomass-based graphene with tunable oxygen species is rapidly fabricated by a CO laser. In a flow cell setup, the laser-induced graphene (LIG) with abundant active oxygen species and graphene structure shows high catalytic performance including high Faraday efficiency (over 78 %) and high mass activity (814 mmolg h ), superior to most of the reported carbon-based electrocatalysts. Density function theory demonstrates the meta-C atoms at nearby C-O, O-C=O species are the key catalytic sites. Therefore, we develop one facile method to rapidly convert biomass to graphene electrocatalyst used for H O synthesis.
氧物种功能化石墨烯（O-G）是一种通过2e氧还原反应（ORR）电化学合成过氧化氢（H₂O₂）的有效电催化剂。O-G中氧物种的类型和碳结晶度是2e ORR具有高催化性能的两个关键因素。然而，通过石墨前驱体制备O-G的常规方法存在消耗大量强氧化剂和洗涤水的缺点。在此，利用CO₂激光快速制备了具有可调氧物种的生物质基石墨烯。在流动池装置中，具有丰富活性氧物种和石墨烯结构的激光诱导石墨烯（LIG）表现出高催化性能，包括高法拉第效率（超过78%）和高质量活性（814 mmol g⁻¹ h⁻¹），优于大多数已报道的碳基电催化剂。密度泛函理论表明，邻近C-O、O-C=O物种的间位C原子是关键催化位点。因此，我们开发了一种简便的方法，可将生物质快速转化为用于H₂O₂合成的石墨烯电催化剂。
