The electrochemical reduction of CO2 to C2 products is believed to proceed via the formation of adsorbed CO as an intermediate. Although ethylene is frequently reported as the main product when using Cu electrocatalysts, recent studies have demonstrated that directly feeding CO can result in the selective formation of acetate. In this study, we investigate the electrochemical reduction of CO2 and CO using Cu electrocatalysts prepared by a one-pot synthesis method employing hydrazine as a reducing agent and polyvinylpyrrolidone (PVP) as a capping agent in a Membrane Electrode Assembly (MEA) cell configuration. We investigated the electrochemical reduction of CO2 and CO using Cu electrocatalysts prepared by a one-pot synthesis method in a Membrane Electrode Assembly (MEA) cell configuration. While CO2 reduction primarily yields ethylene (36.99%), followed by hydrogen, CO, and ethanol, feeding CO directly under the same potential increases the total C2 product yield from 52% to 83%, with acetate becoming the dominant product at 63%. Employing a phosphate buffer to maintain an alkaline pH of 8 further enhances acetate selectivity, reaching 90% with KOH. We propose a mechanism involving a common acetyl intermediate for ethylene formation from CO2 and a ketene intermediate for CO reduction to acetate. Our results highlight the significant impact of feed, electrolyte composition, and pH on product distribution, with direct CO reduction favoring C2 products and alkaline pH promoting acetate selectivity. These findings offer insights for optimizing the electrochemical reduction of CO2 and CO.