CAJ | 학술논문

选用水溶性高分子聚乙烯亚胺(PEI)修饰石墨烯(GN)，增强石墨烯的水溶性和分散性；利用层层自组装法制备{PEI-GN/PW12}n 复合膜，并以此为基底膜，用循环伏安法原位电沉积制备 Pt 纳米簇负载的复合膜催化剂。紫外-可见分光光度法(UV-Vis)、X射线衍射(XRD)、X 射线光电子能谱(XPS)和扫描电子显微镜(SEM)等技术表征复合膜催化剂组成、形貌和结构。循环伏安法(CV)、计时电流法(It)、CO 溶出伏安法及电化学阻抗等电化学方法研究结果表明，该纳米复合膜催化剂对甲醇氧化具有良好的电催化活性、稳定性及抗 CO 毒化能力。
선용수용성고분자취을희아알(PEI)수식석묵희(GN)，증강석묵희적수용성화분산성；이용층층자조장법제비{PEI-GN/PW12}n 복합막，병이차위기저막，용순배복안법원위전침적제비 Pt 납미족부재적복합막최화제。자외-가견분광광도법(UV-Vis)、X사선연사(XRD)、X 사선광전자능보(XPS)화소묘전자현미경(SEM)등기술표정복합막최화제조성、형모화결구。순배복안법(CV)、계시전류법(It)、CO 용출복안법급전화학조항등전화학방법연구결과표명，해납미복합막최화제대갑순양화구유량호적전최화활성、은정성급항 CO 독화능력。
Graphene (GN)was functionalized by the water-soluble polymer polyethyleneimine (PEI)to enhance its solubility and dispersity.The {PEI-GN/PW1 2 }n composite films composed of functionalized graphene (PEI-GN)and phosphotungstic acid (H 3 PW1 2 O 40 ,PW1 2 for short)were prepared by LBL electrostatic assembly technique,and then it was used as a substrate for electro-deposition Pt nanoparticles cluster in-situ by cyclic voltammetry.The fabricated composite films were characterized by ultraviolet-visible spectrophotometry (UV-Vis),X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS)and scanning electron microscope (SEM).Cyclic voltammetry (CV),chronoamperometry (It),CO stripping voltammetry and electrochemical impedance spectra (EIS)analysis show that the Pt/{PEI-GN/PW1 2 }n has superior eletro-catalytic activity,sta-bility and ability to resist CO poisoning regarding methanol oxidation.