碳化钨-石墨烯插层复合物的制备及作为甲醇氧化助催化剂
的性能研究
施梅勤;章文天;李影影;褚有群;马淳安
【期刊名称】《催化学报》 【年(卷),期】2016(037)011
【摘要】Highly dispersed tungsten carbide (WC) nanoparticles (NPs) sandwiched between few‐layer re‐duced graphene oxide (RGO) have been successfully synthesized by using thiourea as an anchoring and inducing reagent. The metatungstate ion, [H2W12O40]6?, is assembled on thiourea‐modified gra‐phene oxide (GO) by an impregnation method. The WC NPs, with a mean diameter of 1.5 nm, are obtained through a process whereby ammonium metatungstate first turns to WS2, which then forms an intercalation compound with RGO before growing, in situ, to WC NPs. The Pt/WC‐RGO electro‐catalysts are fabricated by a microwave‐assisted method. The intimate contacts between Pt, WC, and RGO are confirmed by X‐ray diffraction, scanning electron microscope, transmission electron microscope, and Raman spectroscopy. For methanol oxidation, the Pt/WC‐RGO electrocatalyst ex‐hibited an electrochemical surface area value of 246.1 m2/g Pt and a peak current density of 1364.7 mA/mg Pt, which are, respectively, 3.66 and 4.77 times greater than those of commercial Pt/C electrocatalyst (67.2 m2/g Pt, 286.0 mA/mg Pt). The excellent CO‐poisoning resistance
碳化钨-石墨烯插层复合物的制备及作为甲醇氧化助催化剂的性能研究
