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- Title
Electrocatalytic synthesis of adipic acid coupled with H<sub>2</sub> production enhanced by a ligand modification strategy.
- Authors
Li, Zhenhua; Li, Xiaofan; Zhou, Hua; Xu, Yan; Xu, Si-Min; Ren, Yue; Yan, Yifan; Yang, Jiangrong; Ji, Kaiyue; Li, Li; Xu, Ming; Shao, Mingfei; Kong, Xianggui; Sun, Xiaoming; Duan, Haohong
- Abstract
Adipic acid is an important building block of polymers, and is commercially produced by thermo-catalytic oxidation of ketone-alcohol oil (a mixture of cyclohexanol and cyclohexanone). However, this process heavily relies on the use of corrosive nitric acid while releases nitrous oxide as a potent greenhouse gas. Herein, we report an electrocatalytic strategy for the oxidation of cyclohexanone to adipic acid coupled with H2 production over a nickel hydroxide (Ni(OH)2) catalyst modified with sodium dodecyl sulfonate (SDS). The intercalated SDS facilitates the enrichment of immiscible cyclohexanone in aqueous medium, thus achieving 3.6-fold greater productivity of adipic acid and higher faradaic efficiency (FE) compared with pure Ni(OH)2 (93% versus 56%). This strategy is demonstrated effective for a variety of immiscible aldehydes and ketones in aqueous solution. Furthermore, we design a realistic two-electrode flow electrolyzer for electrooxidation of cyclohexanone coupling with H2 production, attaining adipic acid productivity of 4.7 mmol coupled with H2 productivity of 8.0 L at 0.8 A (corresponding to 30 mA cm−2) in 24 h. Adipic acid is an important building block of polymers, although its production relies on harmful reagents. Here, authors examined surfactant-modified nickel hydroxide for adipic acid electrosynthesis coupled with hydrogen gas evolution.
- Subjects
ADIPIC acid; BLOCK copolymers; NITROUS oxide; CYCLOHEXANONES; ELECTROLYTIC cells; AQUEOUS solutions; GREENHOUSE gases; ELECTROSYNTHESIS
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-32769-0