Abstract
To address the challenges of excessive emission of CO2, development of highly efficient electrocatalysts based onearth-abundant metals and non-metals for CO2 reduction is of great importance. Herein, we report a novel gC3N4/Cu2O-FeO heterogeneous nanocomposite catalyst for electrochemical CO2 reduction to CO, with a maximum Faradaic efficiency of 84.4 % at a low onset overpotential of -0.24 V vs. normal hydrogen electrode (NHE). Moreover, the turnover frequency for CO2 conversion to CO reached 10300 h− 1 with a high selectivity of 96.3 % at -1.60 V vs. Ag/AgCl, corresponding to a thermodynamic overpotential of -0.865 V vs. NHE. The excellent CO2 reduction to CO can be attributed to the intimate interfacial interaction between the g-C3N4 and metal oxides (Cu2O-FeO) and the higher electrochemically active surface area. Therefore, this work demonstrates the use of a g-C3N4/mixed metal oxide heterostructure as a novel and efficient nanocomposite for electrocatalytic CO2 reduction in neutral aqueous medium.
Presenters
Girma WorkenehStudent, MS Analytical Chemistry, Academia Sinica, Institute of Chemistry, Taipei, Ethiopia
Details
Presentation Type
Paper Presentation in a Themed Session
Theme
KEYWORDS
Electrocatalysis Carbon dioxide reduction Composite materials Oxygen vacancies Graphitic carbon nitride Metal oxide
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