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Electrochemical conversion of CO2 to methanol using a glassy carbon electrode, modified by Pt@histamine-reduced graphene oxide.
- Source :
-
International Journal of Hydrogen Energy . Nov2019, Vol. 44 Issue 59, p30820-30831. 12p. - Publication Year :
- 2019
-
Abstract
- The electrochemical reduction of CO 2 to value-added products is one of the useful approaches to reducing the effects of global climate change. Herein, a novel electrocatalyst consisting of platinum nanoparticles on histamine-reduced graphene oxide plates (Pt@His-rGO) supported by a glassy carbon (GC) substrate for the electrochemical conversion of CO 2 to methanol has been developed. The nanocomposite was optimized in terms of pH, applied potential, CO 2 purging time and platinum loading for the highest current densities and faradaic efficiencies toward methanol production. The best results were obtained in a solution containing KNO 3 0.1 mol L−1 at the pH of 2.0, the applied potential of −0.3 V vs Ag/AgCl (KCl sat), CO 2 purging duration of 30 min and Pt loading of 5.17 × 10−7 mol cm−2. The faradaic efficiency of 37% was obtained for methanol production. The prepared nanocomposite requires a lower applied potential and serves as an intermediate stabilizer through the production of methanol. Image 1 • Pt@histamine-reduced graphene oxide is synthesized by oxidative diazonium reaction. • The prepared nanocomposite efficiently reduces CO 2 to methanol. • Histamine stabilizes CO 2 on the electrode surface for the optimized reduction. • A quite low applied potential is required for CO 2 electrolysis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 44
- Issue :
- 59
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 139707148
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2019.09.237