Manipulating Au−CeO2 Interfacial Structure Toward Ultrahigh Mass Activity and Selectivity for CO2 Reduction. Issue 24 (4th November 2020) - Fu, Jile
Abstract: Deploying the application of Au‐based catalysts directly on CO2 reduction reactions (CO2 RR) relies on the simultaneous improvement of mass activity (usually lower than 10 mA mg −1 Au at −0.6 V) and selectivity. To achieve this target, we herein manipulate the interface of small‐size Au (3.5 nm) and CeO2 nanoparticles through adjusting the surface charge of Au and CeO2 . The well‐regulated interfacial structure not only guarantees the utmost utilization of Au, but also enhances the CO2 adsorption. Consequently, the mass activity (CO) of the optimal AuCeO2 /C catalyst reaches 139 mA mg −1 Au with 97 % CO faradaic efficiency (FECO ) at −0.6 V. Moreover, the strong interaction between Au and CeO2 endows the catalyst with excellent long‐term stability. This work affords a charge‐guided approach to construct the interfacial structure for CO2 RR and beyond. Abstract : Putting Au to good use : The charge‐guided assembling of Au and CeO2 nanoparticles creates an enhanced Au−CeO2 interface and guarantees the outmost utilization of Au. Thus, both high activity and CO selectivity were achieved.