Title:	Sn-Decorated Cu/Cu2O Electrodes Enable Selective CO2 Reduction to Formic Acid under Realistic Flue Gas Streams.
Authors:	LEITE, A. DIAS, E. H. AWOTOYE, D. ARANSIOLA, E. AMMAR, M. PEREIRA, E. C. RIBEIRO, C. BALTRUSAITIS, J.
Affiliation:	UNIVERSITY OF SÃO PAULO FEDERAL UNIVERSITY OF SÃO CARLOS LEHIGH UNIVERSITY, BETHLEHEM, PENNSYLVANIA 18015, UNITED STATES LEHIGH UNIVERSITY, BETHLEHEM, PENNSYLVANIA 18015, UNITED STATES LEHIGH UNIVERSITY, BETHLEHEM, PENNSYLVANIA 18015, UNITED STATES FEDERAL UNIVERSITY OF SÃO CARLOS CAUE RIBEIRO DE OLIVEIRA, CNPDIA LEHIGH UNIVERSITY, BETHLEHEM, PENNSYLVANIA 18015, UNITED STATES.
Date Issued:	2026
Citation:	ACS Applied Energy Materials, v. 9, 2026.
Pages:	1912−1929
Description:	Theelectrochemical reductionofCO2 is typically investigatedunderpureCO2 feeds,butpracticaldeploymentmust addressmorecomplexanddilutesourcessuchasfluegases.Here, we studied Cu/Cu2O electrodes decorated with tin (Sn) synthesizedusing a scalable electrodepositionmethodandpost treatments under both pureCO2 and reactive nitrogen oxide containingsimulatedfluegas, towardformicacidsynthesis.Raman spectroscopyandAtomicForceMicroscopyanalysesrevealedthat flue gas exposure induces heterogeneous restructuring of the electrodewith surface roughening, surface carbonate formation, andlocalizedredepositionprocesses.Optimalcatalystperformance underpureCO2wasachievedwithintermediateSncoverageof3 minelectrodeposition, deliveringFaradaic efficiencies of 80%andproduction rates of 370μmol cm−2 h−1. Sn-modifiedCu2O electrodes alsoexhibitedhigh selectivity toward formic acidunder acidic gas containing simulatedflue gas, reachingFaradaic efficienciesof90%albeitatproductionratesof113μmolcm−2h−1,despitea10-foldreducedCO2partialpressure.Theseresults demonstratethat interfacialSn−CustructuresenabledselectiveCO2RRevenunderchallengingfeedconditions,pointingoutboth theopportunitiesandlimitationsof translatinglaboratory-scalecatalysts torealisticgasstreams.
Keywords:	Plasma derived flue gas Oxide derived copper CO2 electroreduction
DOI:	https://doi.org/10.1021/acsaem.5c03902
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPDIA)