Details

Autor(en) / Beteiligte

• Jang, Youn Jeong
• Lee, Jaehyuk
• Kim, Ju Hun
• Lee, Byeong Jun
• Lee, Jae Sung

Titel

One-dimensional CuIn alloy nanowires as a robust and efficient electrocatalyst for selective CO2-to-CO conversion

Ist Teil von

• Journal of power sources, 2018-02, Vol.378, p.412-417

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Electrical anodization of Cu foil produces one-dimensional Cu nanowires of high surface areas, which turns to CuIn alloy nanowires by indium electrodeposition replacing edge site Cu atoms. An electrochemical pre-activation forms a highly conformal amorphous In(OH)3 overlayer with oxygen vacancy on the CuIn alloy that facilitates CO2 adsorption to promote selective CO formation suppressing competing H2 adsorption. Thus the activated CuIn alloy nanowires catalyse electrochemical CO2 conversion to CO with high CO selectivity (>68.2%) and high current density (ca. −3.9 mAcm−2) at −0.6 VRHE, which represents the higher partial CO current density (ca. −2.66 mAcm−2) than that of previously reported CuIn alloy powders without nanostructuring. The performance remains stable for more than 15 h without significant degradation. [Display omitted] •1-D CuIn nanowire electrocatalyst is prepared by anodization and electrodeposition.•In(OH)3 layer is formed on CuIn alloy surface by electrochemical pre-activation.•The catalyst shows best CO2–to-CO reduction activity among reported Cu-In catalysts.•1-D nanostructuring provides higher surface areas and facile charge transfer.