Seminar Paper

Paper Information

video

sound

Persian Version

View:

858

Download:

Cites:

Information Seminar Paper

Title

PREPARATION AND ELECTROCATALYTIC APPLICATION OF NOVEL PD NANOPARTICLE/POLYOXOMETALATE/GRAPHENE NANOHYBRIDS

Pages

 Start Page | End Page

Abstract

 FUEL CELLS ARE WIDELY CONSIDERED TO BE AN IMPORTANT POWER SOURCE DUE TO THEIR HIGH ENERGY CONVERSION, EFFICIENCY AND LOW POLLUTION. THE DIRECT ETHANOL FUEL CELL (DEFC) HAS BEEN PROPOSED AS A POSSIBLE REPLACEMENT FOR BATTERIES AND DIRECT METHANOL FUEL CELL (DMFC) BECAUSE ETHANOL HAS NO TOXICITY COMPARED TO METHANOL AND CAN BE EASILY PRODUCED IN GREAT QUANTITIES BY FERMENTATION OF SUGAR-CONTAINING RAW MATERIALS: AND THE PD-BASED CATALYSTS TOWARD ETHANOL OXIDATION EXHIBIT A HIGHER INITIAL ACTIVITY DUE TO BEING FREE OF CO POISONING COMPARED TO PT, AND ALSO AT A LOWER COST [1]. FURTHERMORE, TO MAXIMIZE THE ELECTROCATALYTIC ACTIVITY OF NPS, A SUITABLE CARBON SUPPORT IS REQUIRED TO DISPERSE THESE NPS. GRAPHENE HAS RECEIVED CONSIDERABLE ATTENTION DUE TO ITS GOOD CHEMICAL AND PHYSICAL PROPERTIES [2]. THERE ARE VARIOUS METHODS TO LOAD METAL NPS ON GNSS. RECENTLY, POLYOXOMETALATES (POMS), THE EARLY TRANSITION METAL OXYGEN ANIONIC CLUSTERS WITH REMARKABLY RICH REDOX AND PHOTO-ELECTROCHEMICAL PROPERTIES [3], HAVE BEEN USED AS A SOLE AGENT TO BUILD METAL NPS@POM [4-7]. HEREIN, WE REPORT AN ALTERNATIVE, IN SITU, EASY AND GREEN STRATEGY FOR THE SYNTHESIS OF PD NPS@POM-GNSS NANOHYBRIDS USING SOLELY POLYOXOMETALATES (POMS) AS REDUCING, STABILIZING AND BRIDGING MOLECULES AND INVESTIGATE THEIR ELECTROCATALYTIC ACTIVITY TOWARD ETHANOL.PDCL2 AND GRAPHITE POWDER WERE PURCHASED FROM MERCK CO., PHOSPHOMOLYBDIC ACID H3 [PMO12O40] (PMO12) WAS PURCHASED FROM ALDRICH CHEMICAL COMPANY.GRAPHENE OXIDE (GO) WAS OXIDIZE FROM GRAPHITE POWDER BY A MODIFIED HUMMERS METHOD USING H2SO4, NANO3 AND KMNO4 IN AN ICE BATH AS REPORTED IN GREAT DETAIL ELSEWHERE. FOR PREPARATION OF PD NPS@POM-GNSS NANOHYBRIDS, PMO12 WAS FIRSTLY REDUCED BY UV PHOTO-REDUCTION. IN A TYPICAL SYNTHESIS PMO12, ISOPROPANOL, PDCL2 AND GO WERE MIXED UNDER UV IRRADIATION. CHARACTERIZATION USING TRANSMISSION ELECTRON MICROSCOPY, FOURIER TRANSFORM INFRARED SPECTROSCOPY (FT-IR), X-RAY DIFFRACTION ANALYSIS (XRD), CYCLIC VOLTAMMETRY (CV), ETC. WAS PERFORMED AND VERIFIED THE STRUCTURE OF THE PREPARED NANOHYBRIDS OF PD NPS@POM-GNSS. CYCLIC VOLTAMMETRY WAS DONE UNDER A CONVENTIONAL THREE COMPARTMENT CELL WITH A GLASSY CARBON WORKING ELECTRODE, A AG/AGCL REFERENCE ELECTRODE AND A PT WIRE FOR COUNTER ELECTRODE.

Cites

  • No record.
  • References

  • No record.
  • Related Journal Papers

  • No record.
  • Related Seminar Papers

  • No record.
  • Related Plans

  • No record.
  • Recommended Workshops