Aqueous Electrochemical Reduction of Carbon Dioxide and Carbon Monoxide into Methanol with Cobalt Phthalocyanine
- Univ. de Paris (France). Lab. d'Electrochimie Moléculaire
- Stanford Univ., CA (United States). SUNCAT Center for Interface Science and Catalysis
- Univ. de Paris (France). Lab. d'Electrochimie Moléculaire; Synchrotron SOLEIL, Gif-sur-Yvette (France)
- Synchrotron SOLEIL, Gif-sur-Yvette (France)
- Stanford Univ., CA (United States). SUNCAT Center for Interface Science and Catalysis; SLAC National Accelerator Lab., Menlo Park, CA (United States). SUNCAT Center for Interface Science and Catalysis
Conversion of CO2 into valuable molecules is a field of intensive investigation with the aim of developing scalable technologies for making fuels using renewable energy sources. While electrochemical reduction into CO and formate are approaching industrial maturity, a current challenge is obtaining more reduced products like methanol. However, literature on the matter is scarce, and even more for the use of molecular catalysts. In this paper, we demonstrate that cobalt phthalocyanine, a well-known catalyst for the electrochemical conversion of CO2 to CO, can also catalyze the reaction from CO2 or CO to methanol in aqueous electrolytes at ambient conditions of temperature and pressure. The studies identify formaldehyde as a key intermediate and an unexpected pH effect on selectivity. This paves the way for establishing a sequential process where CO2 is first converted to CO which is subsequently used as a reactant to produce methanol. Under ideal conditions, the reaction shows a global Faradaic efficiency of 19.5 % and chemical selectivity of 7.5 %.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); French National Research Agency (ANR); China Scholarship Council (CSC); Institut Universitaire de France (IUF)
- Grant/Contract Number:
- AC02-76SF00515; ANR-16-CE05-0010-01
- OSTI ID:
- 1605179
- Journal Information:
- Angewandte Chemie (International Edition), Vol. 58, Issue 45; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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