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

Kamyar, N ; Sharif University of Technology | 2019

1258 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.jcis.2019.08.018
  3. Publisher: Academic Press Inc , 2019
  4. Abstract:
  5. 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 (Cr2O3-NPC). A mixture containing Cr2O3-NPC and [PtCl(SnCl3)(SMe2)2] is then prepared, and underflow of Argon is heated to 380 °C. Finally, Pt-SnO2 nanoparticles are loaded on the Cr2O3-NPC support, and the obtained nanocomposite was denoted as Pt-SnO2/Cr2O3-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/Cr2O3-NPC, Pt-SnO2/Cr2O3-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 SnO2 as an excellent catalytic-enhancing agent thorough facilitating the charge transfer process and increasing the CO poisoning oxidation by the spillover of OHads to the Pt surface. Thus, the prepared Pt-SnO2/Cr2O3-NPC catalyst could be considered a promising anode catalyst for direct ethanol fuel cells. © 2019 Elsevier Inc
  6. Keywords:
  7. Chromium (III) oxide ; Electrocatalytic oxidation ; Metal-organic frameworks ; Nanoporous carbon ; Platinum nanoparticles ; Thin oxide ; Argon ; Carbon carbon composites ; Carbonization ; Catalytic oxidation ; Charge transfer ; Chlorine compounds ; Crystalline materials ; Direct ethanol fuel cells (DEFC) ; Electrocatalysis ; Electrocatalysts ; Electrooxidation ; Ethanol ; Ethanol fuels ; Metal nanoparticles ; Morphology ; Nanocomposites ; Organometallics ; Oxidation ; Platinum compounds ; Platinum metals ; Porous materials ; Chromium oxides ; Electro-catalytic oxidation ; Metal organic framework ; Nanoporous carbons ; Platinum nano-particles ; Thin oxides ; Chromium compounds ; Argon ; carbon ; Chromium ; Metal oxide ; Nanoparticle ; Platinum ; Adsorption ; Alcohol oxidation ; Article ; Catalyst ; Chemical composition ; Chemical reaction ; Chemical reaction kinetics ; Crystal structure ; Cyclic potentiometry ; Dehydrogenation ; Desorption ; Dispersion ; Electron transport ; Impedance spectroscopy ; Priority journal ; Pyrolysis ; Room temperature ; Scanning electron microscopy ; Surface property ; X ray diffraction
  8. Source: Journal of Colloid and Interface Science ; Volume 555 , 2019 , Pages 655-666 ; 00219797 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0021979719309191