High-Entropy Alloys as Catalysts for the CO₂ and CO Reduction Reactions: Experimental Realization

Citations Over TimeTop 1% of 2020 papers

Abstract

Conversion of carbon dioxide into selective hydrocarbon using a stable catalyst remains a holy grail in the catalysis community. The high overpotential, stability, and selectivity in the use of a single-metal-based catalyst still remain a challenge. In current work, instead of using pure noble metals (Ag, Au, and Pt) as the catalyst, a nanocrystalline high-entropy alloy (HEA: AuAgPtPdCu) has been used for the conversion of CO2 into gaseous hydrocarbons. Utilizing an approach of multimetallic HEA, a faradic efficiency of about 100 toward gaseous products is obtained at a low applied potential (-0.3 V vs reversible hydrogen electrode). The reason behind the catalytic activity and selectivity of the high-entropy alloy (HEA) toward CO2 electroreduction was established through first-principles-based density functional theory (DFT) by comparing it with the pristine Cu(111) surface. This is attributed to the reversal in adsorption trends for two out of the total eight intermediates - *OCH3 and *O on Cu(111) and HEA surfaces.

Related Papers

• → Ni Foam-Supported Fe-Doped β-Ni(OH)₂ Nanosheets Show Ultralow Overpotential for Oxygen Evolution Reaction(2019)308 cited
• → High-Performance Electrochemical CO₂ Reduction Cells Based on Non-noble Metal Catalysts(2018)115 cited
• → Improved HER Catalysis through Facile, Aqueous Electrochemical Activation of Nanoscale WSe₂(2018)80 cited
• → Structure of Electrodeposited Cobalt(2002)62 cited
• → The effect of some sulfur-containing additives on the initial cathode overpotential during copper electrodeposition(1973)5 cited