Print Email Facebook Twitter In Situ Fabrication and Reactivation of Highly Selective and Stable Ag Catalysts for Electrochemical CO2 Conversion Title In Situ Fabrication and Reactivation of Highly Selective and Stable Ag Catalysts for Electrochemical CO2 Conversion Author Ma, M. (TU Delft ChemE/Materials for Energy Conversion and Storage) Liu, K. (TU Delft ChemE/Materials for Energy Conversion and Storage) Shen, J. (TU Delft QRD/Kouwenhoven Lab; TU Delft QuTech Advanced Research Centre) Kas, R. (TU Delft ChemE/Materials for Energy Conversion and Storage) Smith, W.A. (TU Delft ChemE/Materials for Energy Conversion and Storage) Date 2018 Abstract In this work, the highly selective and stable electrocatalytic reduction of CO2 to CO on nanostructured Ag electrocatalysts is presented. The Ag electrocatalysts are synthesized by the electroreduction of Ag2CO3 formed by in situ anodic-etching of Ag foil in a KHCO3 electrolyte. After 3 min of this etching treatment, the Ag2CO3-derived nanostructured Ag electrocatalysts are capable of producing CO with up to 92% Faradaic efficiency at an overpotential as low as 290 mV, which surpasses all of the reported Ag catalysts at identical conditions to date. In addition, the anodic-etched Ag retained ∼90% catalytic selectivity in the electroreduction of CO2 to CO for more than 100 h. The Ag2CO3-derived Ag is able to facilitate the activation of CO2 via reduction of the activation energy barrier of the initial electron transfer and provide an increased number of active sites, resulting in the dramatically improved catalytic activity for the reduction of CO2 to CO. To reference this document use: http://resolver.tudelft.nl/uuid:15ae0946-edfd-4a4d-804b-c24ed63e1a56 DOI https://doi.org/10.1021/acsenergylett.8b00472 ISSN 2380-8195 Source ACS Energy Letters, 3 (6), 1301-1306 Part of collection Institutional Repository Document type journal article Rights © 2018 M. Ma, K. Liu, J. Shen, R. Kas, W.A. Smith Files PDF acsenergylett.8b00472_1_.pdf 2.76 MB Close viewer /islandora/object/uuid:15ae0946-edfd-4a4d-804b-c24ed63e1a56/datastream/OBJ/view