4.6 Article

Evolution of bismuth-based metal-organic frameworks for efficient electroreduction of CO2

期刊

JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 34, 页码 17801-17807

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta04485d

关键词

-

资金

  1. EPSRC [NS/A000055/1, EP/P001386, EP/I011870]
  2. Royal Society
  3. China Scholarship Council (CSC)
  4. European Research Council (ERC) under the European Union [742401]
  5. Royal Society Newton International Fellowships
  6. University of Manchester

向作者/读者索取更多资源

This study investigates the impact of porosity of MOFs on their evolution as electrocatalysts for CO2 reduction and demonstrates the significance of porosity in the generation of value-added chemicals.
Understanding the structural and chemical changes that reactive metal-organic frameworks (MOFs) undergo is crucial for the development of new efficient catalysts for electrochemical reduction of CO2. Here, we describe three Bi(iii) materials, MFM-220, MFM-221 and MFM-222, which are constructed from the same ligand (biphenyl-3,3 ',5,5 '-tetracarboxylic acid) but which show distinct porosity with solvent-accessible voids of 49.6%, 33.6% and 0%, respectively. We report the first study of the impact of porosity of MOFs on their evolution as electrocatalysts. A Faradaic efficiency of 90.4% at -1.1 V vs. RHE (reversible hydrogen electrode) is observed for formate production over an electrode decorated with MFM-220-p, formed from MFM-220 on application of an external potential in the presence of 0.1 M KHCO3 electrolyte. In situ electron paramagnetic resonance spectroscopy confirms the presence of center dot COOH radicals as a reaction intermediate, with an observed stable and consistent Faradaic efficiency and current density for production of formate by electrolysis over 5 h. This study emphasises the significant role of porosity of MOFs as they react and evolve during electroreduction of CO2 to generate value-added chemicals.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据