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Cost Effective and Scalable Synthesis of Supported Au Nanoparticles for the Electroreduction of CO2 to CO

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Various loadings of gold supported on carbon black (Au/CB) were synthesized via a simple and scalable one-pot process and then tested as catalysts for the electroreduction of CO2 to CO. The bulk and surface properties of the Au/CB materials were characterized using XRD, TGA, XPS, TEM and HRTEM techniques. The synthesized Au nanoparticles are of average diameters ∼10± 2 nm and show a promising selectivity and energy efficiency. The electrochemical performance of some of the studied electrocatalysts (namely Au-40/CB and Au-50/CB) was as high as 93.5% selectivity toward CO over the undesired H2 evolution and specific CO current densities were in excess of– 6 A/cm2 -g (at– 1.4 vs. Ag/AgCl). This study clearly shows that desirable performance for the electroreduction of CO2 to CO is, certainly, achievable with Au/CB catalyst prepared by a low-cost route providing that the Au nanoparticles are suitably sized and deposited with the optimum wt% on the CB support.
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Keywords: ACTIVITY; CARBON MONOXIDE; DURABILITY; ELECTROCATALYSTS; SELECTIVITY

Document Type: Research Article

Publication date: June 1, 2017

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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