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Article Dans Une Revue ChemSusChem Année : 2016

CO$_2$ reduction to CO in water: carbon nanotube–gold nanohybrid as a selective and efficient electrocatalyst

Résumé

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.

Dates et versions

hal-01354108 , version 1 (17-08-2016)

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Tran Ngoc Huan, Praveen Prakash, Philippe Simon, Gwenaëlle Rousse, X. Xu, et al.. CO$_2$ reduction to CO in water: carbon nanotube–gold nanohybrid as a selective and efficient electrocatalyst. ChemSusChem, 2016, 9 (17), pp.2317-2320. ⟨10.1002/cssc.201600597⟩. ⟨hal-01354108⟩
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