Electrosynthesis of adipic acid with high faradaic efficiency within a wide potential window

Xiang Liu, Yu-Quan Zhu, Jing Li (), Ye Wang, Qiujin Shi, An-Zhen Li, Kaiyue Ji, Xi Wang, Xikang Zhao, Jinyu Zheng and Haohong Duan ()
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Xiang Liu: Tsinghua University
Yu-Quan Zhu: Hubei Normal University
Jing Li: Sichuan University
Ye Wang: Tsinghua University
Qiujin Shi: Tsinghua University
An-Zhen Li: Tsinghua University
Kaiyue Ji: Tsinghua University
Xi Wang: Tsinghua University
Xikang Zhao: Ltd.
Jinyu Zheng: Ltd.
Haohong Duan: Tsinghua University

Nature Communications, 2024, vol. 15, issue 1, 1-16

Abstract: Abstract Electrosynthesis of adipic acid (a precursor for nylon-66) from KA oil (a mixture of cyclohexanone and cyclohexanol) represents a sustainable strategy to replace conventional method that requires harsh conditions. However, its industrial possibility is greatly restricted by the low current density and competitive oxygen evolution reaction. Herein, we modify nickel layered double hydroxide with vanadium to promote current density and maintain high faradaic efficiency (>80%) within a wide potential window (1.5 ~ 1.9 V vs. reversible hydrogen electrode). Experimental and theoretical studies reveal two key roles of V modification, including accelerating catalyst reconstruction and strengthening cyclohexanone adsorption. As a proof-of-the-concept, we construct a membrane electrode assembly, producing adipic acid with high faradaic efficiency (82%) and productivity (1536 μmol cm−2 h−1) at industrially relevant current density (300 mA cm−2), while achieving >50 hours stability. This work demonstrates an efficient catalyst for adipic acid electrosynthesis with high productivity that shows industrial potential.

Date: 2024
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DOI: 10.1038/s41467-024-51951-0

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