Direct conversion of inorganic complexes to platinum/thin oxide nanoparticles decorated on MOF-derived chromium oxide/nanoporous carbon composite as an efficient electrocatalyst for ethanol oxidation reaction.

Author(s) Kamyar, N.; Rezaee, S.; Shahrokhian, S.; Amini, M.M.
Journal J Colloid Interface Sci
Date Published 2019 Nov 01

In this work, we present the design and fabrication of a novel nanocomposite based on noble metal and metal oxide nanoparticles dispersed on highly porous carbon obtained via the pyrolysis of an inorganic complex and metal-organic frameworks. This nanocomposite is prepared by a two-step procedure: first, the composite support of nanoporous carbon (NPC) is obtained by the direct carbonization of the Cr-benzene dicarboxylic ligand (BDC) MOF in an Argon atmosphere at 500 °C (CrO-NPC). A mixture containing CrO-NPC and [PtCl(SnCl)(SMe)] is then prepared, and underflow of Argon is heated to 380 °C. Finally, Pt-SnO nanoparticles are loaded on the CrO-NPC support, and the obtained nanocomposite was denoted as Pt-SnO/CrO-NPC. The morphology and crystalline structure of the prepared nanocomposites were characterized using XRD, SEM, EDX, FT-IR, and XPS. In addition, the prepared nanocomposite was examined as a novel electrocatalyst for the ethanol electro-oxidation reaction (EOR). The obtained results demonstrated that, compared with Pt/CrO-NPC, Pt-SnO/CrO-NPC showed higher electrocatalytic activity, lower onset potential, and a higher level of poisoning tolerance toward of ethanol oxidation in acidic media. The overall results corroborate the predominant role of SnO as an excellent catalytic-enhancing agent thorough facilitating the charge transfer process and increasing the CO poisoning oxidation by the spillover of OH to the Pt surface. Thus, the prepared Pt-SnO/CrO-NPC catalyst could be considered a promising anode catalyst for direct ethanol fuel cells.

DOI 10.1016/j.jcis.2019.08.018
ISSN 1095-7103
Citation J Colloid Interface Sci. 2019;555:655666.

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