title: CO2 Reduction to CO in Water: Carbon Nanotube-Gold Nanohybrid as a Selective and Efficient Electrocatalyst.
abstract: A gold-based nanostructure has been demonstrated as promising materials for the selective electroreduction of CO2 to CO in aqueous conditions. In this work, we present a carbon nanotube-gold nanohybrid as a selective and efficient electrocatalyst for the reduction of CO2 in 0.5 m NaHCO3 . The hybrid material exhibits remarkable activity with a current density of 10 mA cm(-2) at -0.55 V versus standard hydrogen electrode with a stable CO production rate (0.52 μmol s(-1) ) after 4 h electrolysis. Monodispersed gold nanoparticles anchored on carbon nanotubes through a layer-by-layer method allows very little Au loading and thus minimization of the cost of electrode fabrication with a mass activity up to 100 A g(-1) at -0.55 V versus reversible hydrogen electrode. It is 33 times higher than a previous report for monodisperse Au nanoparticles (3 A g(-1) ) while ensuring selectivity (70 % faradaic yield of CO) at comparable reduction potential.
authors: Laboratoire de Chimie des Processus Biologiques, Collège de France, 11 Place Marcelin Berthelot, 75005, Paris, France.
authors: Tran Ngoc
authors: TN
authors: Huan
authors: iBiTecS, Service de Chimie Bioorganique et de Marquage, CEA Saclay, 91191, Gif-sur-Yvette, France.
authors: Praveen
authors: P
authors: Prakash
authors: Laboratoire de Chimie des Processus Biologiques, Collège de France, 11 Place Marcelin Berthelot, 75005, Paris, France.
authors: Philippe
authors: P
authors: Simon
authors: FRE 3677 "Chimie du Solide et Energie", Collège de France, 11 Place Marcelin Berthelot, 75005, Paris, France.
authors: Gwenaëlle
authors: G
authors: Rousse
authors: Laboratoire de Physique et d'Etude des Matériaux, ESPCI-ParisTech, PSL Research University, 75005, Paris, France.
authors: X
authors: X
authors: Xu
authors: Laboratoire de Chimie et Biologie des Métaux, Université Grenoble Alpes, CNRS UMR 5249, CEA, 17 rue des Martyrs, F-38000, Grenoble, France.
authors: Vincent
authors: V
authors: Artero
authors: iBiTecS, Service de Chimie Bioorganique et de Marquage, CEA Saclay, 91191, Gif-sur-Yvette, France.
authors: Edmond
authors: E
authors: Gravel
authors: iBiTecS, Service de Chimie Bioorganique et de Marquage, CEA Saclay, 91191, Gif-sur-Yvette, France.
authors: Eric
authors: E
authors: Doris
authors: Laboratoire de Chimie des Processus Biologiques, Collège de France, 11 Place Marcelin Berthelot, 75005, Paris, France. mfontecave@cea.fr.
authors: Marc
authors: M
authors: Fontecave
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D002248:Carbon Monoxide / Q000737:chemistry*; D002384:Catalysis; D004563:Electrochemistry; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction; D014867:Water / Q000737:chemistry*
chemical_list: D037742:Nanotubes, Carbon; D014867:Water; D002245:Carbon Dioxide; D006046:Gold; D002248:Carbon Monoxide
keywords: carbon nanotubes; co2 reduction; electrocatalysis; gold; nanoparticles