2026-10-14T12:11:57Z https://www.scidb.cn/oai

10.57760/sciencedb.38437 2026-05-29T16:57:59Z

2026-05-29 Carbon Nanotube as Metal Free Catalyst for 5-Hydroxymethylfurfural Electrooxidation doi:10.57760/sciencedb.38437 en Carbon materials exhibit promising metal-free catalytic properties in various catalytic processes due to their adjustable physical and chemical characteristics. In this study, we developed a highly active carbon nanotube (CNT) by adjusting the surficial oxygen functionality as a metal-free electrode to mediate the electrooxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA), utilizing TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) as a co-catalyst. The oxygen-functionalized carbon nanotube (CNT) exhibited good HMF oxidation activity with an onset potential of 1.09 V and good stability of recycling 5 times. A systematic study of the CNT surface was conducted to reveal the mechanism of the HMF oxidation process on the CNT during the reaction. Phenolic groups on the CNT surface were confirmed to be active sites for the reaction; carbonyl groups also contributed to the activity by converting into phenolic groups during the reaction. Carbon shows no valence change during the catalysis process, allowing it to maintain structural stability compared to different metal catalysts. Therefore, carbon materials are promising electrode material for scalable and sustainable applications in the HMF electrochemical oxidation process. carbon nanotube; HMF electrooxidation; metal free catalysis; dimensional stability Pang Bohao Susan Haishan Gu Qingqing Hao Jieyong Zeng Duo Liang Chao'an Dang Yuying Ding Yuxiao Saskia Heumann PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset http://www.doi.org/10.3724/j.issn1001-3555.2026.03.002 Science Data Bank