Research Information System
247th ECS Meeting, Montreal, Canada, 18 - 22 May 2025, pp.1471, (Summary Text)
Electrochemical reduction of CO2 is an emerging and current issue for its conversion in to valuable product upon minimization of its atmospheric level for contribution of maintaining within the range of permissible limit. Among plenty of electro-catalysts gold and copper are efficient and effective catalysts, which are synthesized and applicable for this research work. The two metal catalysts were prepared in inert and open air environment with different compositions through co-reduction process from their corresponding precursors and then by adding multi-walled carbon nano-tube and tetratitanium heptoxide (Ti4O7) as a supporter and enhanced the conductivity. The catalytic performance of CO2 reduction for each composition was performed and resulted an outstanding catalytic activity with generation of high current density (above 70 mA/cm2) with less onset potential i.e less than -0.8V vs. RHE. The catalytic performance, compositions, morphologies, structure and geometric arrangements were evaluated by electrochemical analysis (LSV, impedance, chronoamperometry & tafel plot), EDS, SEM and XAS respectively. The composite metals showed better selectivity of products and faradaic efficiencies due to the synergetic effects of the combined nano-particles in addition to the impact of grain size in reduction of CO2. Carbon monoxide, hydrogen, formate and ethanol are the reduction products, which are detected and quantifiable by chromatographic techniques considering their physical state of each product.