biostudies-literatureLu SUtdannings- og forskningsdepartementetNorwegian Ministry of Education and ResearchOP VVV "Excellent Research Teams"e202200870https://www.ebi.ac.uk/biostudies/studies/S-EPMC9804562biostudies-literatureUnknown15(19)Developing highly efficient electrocatalysts for electrochemical CO₂ reduction (ECR) to value-added products is important for CO₂ conversion and utilization technologies. In this work, a sulfur-doped Ni-N-C catalyst is fabricated through a facile ion-adsorption and pyrolysis treatment. The resulting Ni-NS-C catalyst exhibits higher activity in ECR to CO than S-free Ni-N-C, yielding a current density of 20.5 mA cm^-2 under -0.80 V versus a reversible hydrogen electrode (vs. RHE) and a maximum CO faradaic efficiency of nearly 100 %. It also displays excellent stability with negligible activity decay after electrocatalysis for 19 h. A combination of experimental investigations and DFT calculations demonstrates that the high activity and selectivity of ECR to COChemSusChemSulfur-Decorated Ni-N-C Catalyst for Electrocatalytic CO₂ Reduction with Near 100 % CO Selectivity.PMC9804562CZ.02.1.01/0.0/0.0/15_003/0000417Mazur MZhang YEgwu Eleri OLu SGu MLi ALou FYu ZMady MFMekonnen Tucho WfalseSulfur-Decorated Ni-N-C Catalyst for Electrocatalytic CO₂ Reduction with Near 100 % CO Selectivity.Developing highly efficient electrocatalysts for electrochemical CO₂ reduction (ECR) to value-added products is important for CO₂ conversion and utilization technologies. In this work, a sulfur-doped Ni-N-C catalyst is fabricated through a facile ion-adsorption and pyrolysis treatment. The resulting Ni-NS-C catalyst exhibits higher activity in ECR to CO than S-free Ni-N-C, yielding a current density of 20.5 mA cm^-2 under -0.80 V versus a reversible hydrogen electrode (vs. RHE) and a maximum CO faradaic efficiency of nearly 100 %. It also displays excellent stability with negligible activity decay after electrocatalysis for 19 h. A combination of experimental investigations and DFT calculations demonstrates that the high activity and selectivity of ECR to CO2022-01-01T00:00:00Z2022 Oct2026-03-16T08:08:01.771Z2025-04-05T12:09:38.19ZS-EPMC98045623592907610.1002/cssc.202200870