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Abstract
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Herein, fibrous rhodium (Rh) was engineered using a microemulsion system. In this study, we report the
design and synthesis of high-surface-area rhodium using Na3RhCl6. The fibrous rhodium nanocatalyst
was thoroughly characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM),
transmission electron microscopy (TEM), and a N2 adsorption/desorption study. Due to the large ionic
internal character, high mechanical and thermal stability as well as long-term colloidal stability, this
system could be considered as a perfect nanocatalyst using the host–guest approach. Fibrous rhodium
NPs were highly active for the catalytic hydrogenation of carbon dioxide with a 1 M KOH solution at
70 1C using 1 : 1 partial pressure of pCO2/pH2 and provided a high yield of 97% in 12 h; moreover, the
influences of all the catalytic parameters and the reusability of the catalyst were investigated; the catalyst
offers high activity and strong potential for application in the carbon dioxide reaction in aqueous media
with an affordable metal source and molecular hydrogen.
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