 The study presents a cascade AGCU single-atom and nanoparticle electric catalyst that achieves high selectivity for multi-carbon products in CO2 reduction using alkaline electrolyte and 720 mA Cm to working current density. The high Fe of 94 plus or minus 4 percent is attributed to the cooperative effect between AGCU single-atom alloys and AG nanoparticles resulting in increased adsorption energy of CO on CU sites due to asymmetric bonding with adjacent AG atoms. This article was authored by Chengdu, Joel P Mills, Asfor G. Johannes and others.