J. Mater. Sci. Technol. ›› 2023, Vol. 161: 111-122.DOI: 10.1016/j.jmst.2023.04.006

• Research Article • Previous Articles     Next Articles

Nanostructured bimetallic Zn/Co in N-doped carbon as an efficient catalyst for the alcohol dehydrogenation to carboxylic acids under solvent-free conditions

Zhong-Hui Zhenga,b, Somboon Chaemchuena,*, Jun-Fei Gua,b, Jing Hanga,b, Wei Sanga,b, Ji-Chao Wanga,b, Ye Yuana, Cheng Chena,*   

  1. aState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;
    bSchool of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
  • Received:2023-02-01 Revised:2023-03-20 Accepted:2023-04-01 Published:2023-10-20 Online:2023-04-27
  • Contact: *E-mail addresses: sama_che@hotmail.com (S. Chaemchuen), chengchen@whut.edu.cn (C. Chen)

Abstract: The catalytic alcohol dehydrogenation to carboxylic acids has been demonstrated as an atom-economic and environmental-friendly synthetic method. However, the reported catalysts either require relatively complicated synthesis or exhibit high activity only in the presence of a solvent. Therefore, it is still in high demand to obtain catalysts that feature facile synthesis and perform well even without any solvent. Herein, a series of nanostructured bimetallic Zn/Co species embedded in N-doped hierarchical porous carbon were fabricated in a facile and green manner. More significantly, the best-performing material (Zn/Co@NC-800) was identified as the first heterogeneous catalyst to enable this transformation under solvent-free conditions. Moreover, the as-prepared composites were comprehensively investigated to determine their structural and morphological properties, which rationalized the superiority of Zn/Co@NC-800 over the other synthesized materials. Further studies signified that Co sites (both Co0 and Co2+) and N species (mainly pyridinic N) were probably involved in this process, functioning as the Lewis acid site and basic site, respectively. Hopefully, this study could provide a simple and sustainable method for carboxylic acid synthesis.

Key words: Heterogeneous catalysis, Bimetallic ZIFs, Pyrolysis, Solvent-free, Alcohol dehydrogenation, Carboxylic acids