Milošević Dragana, Stevanović Sanja, Tripković Dušan, Vukašinović Ivana, Maksimović Vesna, Ćosović Vladan, Nikolić Nebojša D
Department of Ecology and TechnoEconomics, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia.
Department of Electrochemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia.
Materials (Basel). 2023 Jun 27;16(13):4617. doi: 10.3390/ma16134617.
This work highlights the potential for the synthesis of new PtSnZn catalysts with enhanced efficiency and durability for methanol oxidation reaction (MOR) in low-temperature fuel cells. In this research, PtZn and PtSnZn nanoparticles deposited on high surface area Vulcan XC-72R Carbon support were created by a microwave-assisted polyol method. The electrochemical performances of synthesized catalysts were analyzed by cyclic voltammetry and by the electrooxidation of adsorbed CO and the chronoamperometric method. The physicochemical properties of obtained catalysts were characterized by transmission electron microscopy (TEM), thermogravimetric (TGA) analysis, energy dispersive spectroscopy (EDS) and by X-ray diffraction (XRD). The obtained findings showed the successful synthesis of platinum-based catalysts. It was established that PtSnZn/C and PtZn/C catalysts have high electrocatalytic performance in methanol oxidation reactions. Catalysts stability tests were obtained by chronoamperometry. Stability tests also confirmed decreased poisoning and indicated improved stability and better tolerance to CO-like intermediate species. According to activity and stability measurements, the PtSnZn/C catalyst possesses the best electrochemical properties for the methanol oxidation reaction. The observed great electrocatalytic activity in the methanol oxidation reaction of synthesized catalysts can be attributed to the beneficial effects of microwave synthesis and the well-balanced addition of alloying metals in PtSnZn/C catalysts.
这项工作突出了合成新型PtSnZn催化剂的潜力，该催化剂在低温燃料电池中对甲醇氧化反应（MOR）具有更高的效率和耐久性。在本研究中，通过微波辅助多元醇法制备了负载在高比表面积Vulcan XC - 72R碳载体上的PtZn和PtSnZn纳米颗粒。通过循环伏安法、吸附CO的电氧化以及计时电流法对合成催化剂的电化学性能进行了分析。通过透射电子显微镜（TEM）、热重（TGA）分析、能量色散光谱（EDS）和X射线衍射（XRD）对所得催化剂的物理化学性质进行了表征。所得结果表明成功合成了铂基催化剂。已确定PtSnZn/C和PtZn/C催化剂在甲醇氧化反应中具有高电催化性能。通过计时电流法进行了催化剂稳定性测试。稳定性测试还证实了中毒现象减少，并表明稳定性提高以及对类CO中间物种的耐受性更好。根据活性和稳定性测量结果，PtSnZn/C催化剂在甲醇氧化反应中具有最佳的电化学性能。合成催化剂在甲醇氧化反应中观察到的高电催化活性可归因于微波合成的有益效果以及PtSnZn/C催化剂中合金金属的良好平衡添加。
