TY - JOUR
T1 - Selective and efficient reduction of carbon dioxide to carbon monoxide on oxide-derived nanostructured silver electrocatalysts
AU - Ma, Ming
AU - Trześniewski, Bartek J.
AU - Xie, Jie
AU - Smith, Wilson A.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - In this work, the selective electrocatalytic reduction of carbon dioxide to carbon monoxide on oxide-derived silver electrocatalysts is presented. By a simple synthesis technique, the overall high faradaic efficiency for CO production on the oxide-derived Ag was shifted by more than 400 mV towards a lower overpotential compared to that of untreated Ag. Notably, the Ag resulting from Ag oxide is capable of electrochemically reducing CO2to CO with approximately 80 % catalytic selectivity at a moderate overpotential of 0.49 V, which is much higher than that (ca. 4 %) of untreated Ag under identical conditions. Electrokinetic studies show that the improved catalytic activity is ascribed to the enhanced stabilization of COOH.intermediate. Furthermore, highly nanostructured Ag is likely able to create a high local pH near the catalyst surface, which may also facilitate the catalytic activity for the reduction of CO2with suppressed H2evolution.
AB - In this work, the selective electrocatalytic reduction of carbon dioxide to carbon monoxide on oxide-derived silver electrocatalysts is presented. By a simple synthesis technique, the overall high faradaic efficiency for CO production on the oxide-derived Ag was shifted by more than 400 mV towards a lower overpotential compared to that of untreated Ag. Notably, the Ag resulting from Ag oxide is capable of electrochemically reducing CO2to CO with approximately 80 % catalytic selectivity at a moderate overpotential of 0.49 V, which is much higher than that (ca. 4 %) of untreated Ag under identical conditions. Electrokinetic studies show that the improved catalytic activity is ascribed to the enhanced stabilization of COOH.intermediate. Furthermore, highly nanostructured Ag is likely able to create a high local pH near the catalyst surface, which may also facilitate the catalytic activity for the reduction of CO2with suppressed H2evolution.
KW - carbon dioxide
KW - conversion of carbon dioxide
KW - electrocatalysis
KW - heterogeneous catalysis
KW - surface chemistry
UR - http://www.scopus.com/inward/record.url?scp=84979010664&partnerID=8YFLogxK
U2 - 10.1002/anie.201604654
DO - 10.1002/anie.201604654
M3 - Article
C2 - 27377237
AN - SCOPUS:84979010664
SN - 1433-7851
VL - 55
SP - 9748
EP - 9752
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 33
ER -