The electrochemical reduction of CO2 offers potential for utilizing CO2 as a carbon feedstock and storing intermittent renewable energy. Presently, copper stands out as the only electrocatalyst capable of reducing CO2 into multiple hydrocarbon products. However, the performance of Cu catalysts is hindered due to poor selectivity, stability and high overpotential. In addressing these bottlenecks, our research focuses on the synthesis and characterization of Pd doped Cu bimetallic catalysts, for improving the selectivity and stability of Cu catalysts during CO2 reduction. We leverage cutting-edge In-situ Shell-Isolated Nanoparticles Enhanced Raman Spectroscopy (SHINERS) to investigate structural and compositional changes on the catalyst surface during electrochemical processes within a CO2 electrolyzer. Our preliminary in-situ Raman findings indicate a strong link between the selectivity of the bimetallic electrocatalyst in CO2 electrolysis and the surface oxide phases of the catalysts. This investigation provides crucial insights for designing an efficient electrocatalyst for CO2 reduction.