N ano SBA۱ ۵ mesop orous: A porous m aterial fo r electrooxidation of metanol

Oxidation of meth anol contains large overvoltage at most no nmodi¿ed electrode s urfaces. The development of novel modified electrode for electro catalytic oxidation of methanol to decrease overvoltage is of interest. S ome problems like relatively slow kinetics and continuous poisoning of the catalysts d ue to the pr esence of intermediates generated in the methanol oxidatio n reaction limit its performan ce [۱] limit the performance of direct methanol fuel cells (DMFC). In this paper, we re port a new zeolite-modi¿ed carb on paste electro de based o n Nickel- SBA-۱۵ na nozeolite for methan ol electro oxidation. SBA-۱۵ nanozeolite was synthesized using amo rphous silica which extracted from sorgh um with approximately ۸۰ % purity T he synthesized SBA-۱۵ nanozeolite particles are rodlik e shape with average diameter of ۸۲ nm and length in the ra nge of ۵۰-۲۵۰ nm. Nickel-SBA-۱ ۵ carbon paste electrode ( Ni/SBACP E) was us ed to investigate the electrocat alytic oxidation of methanol in alkali ne solution by cyclic voltammetry (CV) and c hronoamp erometry (C A).

کلیدواژه ها:

SBA-۱ ۵ nanoparticles ، modified electrode ، methan ol ، electroc atalitic oxidation