不同制备方法对Pt/石墨烯电催化性能的影响
Effects of different preparation methods on the electro-catalytic performance of Pt/Graphene
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摘要: 以氧化石墨为载体前驱体，聚乙烯吡咯烷酮（PVP）为络合剂，分别采用有机溶胶法和硼氢化钠还原法同时还原氧化石墨烯和氯铂酸制备Pt/石墨烯（分别简写为Pt/Gr-OS和Pt/Gr-SR）.利用TEM和XRD对所制备催化剂的形貌、粒径大小、粒径分布进行表征和分析，并采用循环伏安法和计时电流法对催化剂的电催化性能进行测试.结果表明，与Pt/C催化剂相比，采用上述两种制备方法得到的Pt/Gr催化剂分散性都较高，且Pt/Gr-OS的分散性优于Pt/Gr-SR；Pt/Gr-OS具有较小的粒径、较大的电化学活性比表面积，对甲醇氧化具有较高的电催化性能，分别是Pt/Gr-SR和Pt/C催化剂的1.7倍和3.8倍，且具有较高的稳定性.Abstract: Pt/Gr catalysts were prepared via both organic sol method and sodium borohydride reduction method (denoted as Pt/Gr-OS and Pt/Gr-SR, respectively) with grapheme oxide (GO) as carrier precursor and chloroplatinic acid with polyvinyl pyrrolidone (PVP) as complexing agent.TEM and XRD were used to characterize the morphology, particle size, and size distribution, and the electro-catalytic performance of the catalysts for methanol oxidation was also investigated by means of cyclic voltammetry and chronoamperometry. The results showed that compared with Pt/C, the Pt/Gr catalysts obtained by using both of the methods had high dispersion and Pt/Gr-OS had higher dispersion than Pt/Gr-SR; Pt/Gr-OS had smaller particle size,larger electrochemical activity specific surface area,and higher electro-catalytic performance on methanol oxidation.The electro-catalytic performance of Pt/Gr-OS was 1.7 and 3.8 times as those of Pt/Gr-SR and Pt/C catalysts, respectively. In addition, Pt/Gr-OS had higher stability than Pt/Gr-SR and Pt/C.
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[1]
LEE Y H,LEE G,SHIM J H,et al.Monodisperse PtRu nanoalloy on carbon as a high-performance DMFC catalyst[J].Chem Mater,2006,18(18):4209.
-
[2]
GEIM A K,NOVOSELOV K S.The rise of graphene[J].Nature Mater,2007,6(3):183.
-
[3]
高海丽,李小龙,贺威,等.一步法制备还原态氧化石墨烯载铂纳米粒子及其对甲醇氧化的电催化性能[J].物理化学学报,2015,31(11):2117.
-
[4]
JI H Q,LI M G,WANG Y L,et al.Electrodeposition of graphene-supported PdPt nanoparticles with enhanced electrocatalytic activity[J].Electrochem Commun,2012,24:17.
-
[5]
KUNG C C,LIN P Y,XUE Y,et al.Three dimensional graphene foam supported platinum-ruthenium bimetallic nanocatalysts for direct methanol and direct ethanol fuel cell applications[J].J Power Sources,2014,256:329.
-
[6]
YAN Z X,HE G Q,JIANG Z F,et al.Mesoporous graphene-like nanobowls as Pt electrocatalyst support for highly active and stable methanol oxidation[J].J Power Sources,2015,284:497.
-
[7]
WANG X M,LIAN J,WANG Y.The effect of Sn on platinum dispersion in Pt/graphene catalysts for the methanol oxidation reaction[J].Int J Hydrogen Energy,2014,39(26):14288.
-
[8]
ENSAFI A A,JAFARI-ASL M,REZAEI B.A new strategy for the synthesis of 3-D Pt nanoparticles on reduced graphene oxide through surface functionalization,application for methanol oxidation and oxygen reduction[J].Electrochim Acta,2014,130:397.
-
[9]
GEORGAKILAS V,GOURNIS D,TZITZIOS V,et al.Decorating carbon nanotubes with metal or semiconductor nanoparticles[J].J Mater Chem,2007,17(26):2679.
-
[10]
ZHOU Y K,HE B L,ZHOU W J,et al.Electrochemical capacitance of well-coated single-walled carbon nanotube with polyaniline composites[J].Electrochim Acta,2004,49(2):257.
-
[11]
PRABHURAM J,MANOHARAN R.Investigation of methanol oxidation on unsupported platinum electrodes in strong alkali and strong acid[J].J Power Sources,1998,74(1):54.
-
[12]
GAO H L,LIAO S J,LIANG Z X,et al.Anodic oxidation of ethanol on core-shell structured Ru@PtPd/C catalyst in alkaline media[J].J Power Sources,2011,196(15):6138.
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