三维结构氧化石墨烯载铂催化剂对甲醇电催化性能

周阳; 胡仙超; 曾敏; 傅俊祥; 钟盛文

三维结构氧化石墨烯载铂催化剂对甲醇电催化性能

周阳^{1, 2},
胡仙超³,
曾敏²,
傅俊祥¹,
钟盛文^2, ,

1.
江西理工大学工程研究院, 江西赣州 341000
2.
江西省动力电池及其材料重点实验室, 江西赣州 341000
3.
浙江工业大学分析测试中心, 浙江杭州 310032

基金项目:

国家自然科学基金 51404110 and 21506187

江西省教育厅项目 GJJ150665 and GJJ150633

详细信息

通讯作者:
E-mail:zhongshw@126.com.

中图分类号: O646
计量
- 文章访问数: 74
- HTML全文浏览量: 27
- PDF下载量: 11
- 被引次数: 0
出版历程
- 收稿日期: 2016-07-19
- 修回日期: 2016-12-08
- 网络出版日期: 2021-01-23
- 刊出日期: 2017-02-10

Performance of the platinum nanoparticles supported on three-dimensional graphene as electro-catalyst for methanol electro-oxidation

1.
Metallurgical and Chemical Engineering Institute, Jiangxi University of Science and Technology, Ganzhou 341000, China
2.
Key Laboratory of Power Batteries & Relative Materials, Ganzhou 341000, China
3.
Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310032, China

Funds:

National Natural Science Foundation of China 51404110 and 21506187

Education Department Project Fund of Jiangxi Province GJJ150665 and GJJ150633

摘要

摘要: 喷雾干燥法制备具有三维结构的氧化石墨烯（PGO），在其表面进一步负载活性成分Pt，得到纳米Pt/PGO复合催化剂。采用X射线粉末衍射（XRD）、透视电镜（TEM）和扫描电镜（SEM）等对催化剂的形貌和结构进行表征。结果表明，PGO具有类似于长4-6 μm和宽2.0-3.0 μm的三维纸团结构，平均粒径为4.2 nm的Pt纳米粒子均匀分布在其表面。采用循环伏安和计时电流法研究了在酸性溶液中催化剂对甲醇的电催化氧化性能。结果表明，Pt/PGO催化剂对甲醇呈现出更高的电催化氧化活性和稳定性。PGO所具有的三维结构和双功能作用机理有利于甲醇在铂表面的电催化氧化过程的发生。
- 直接甲醇燃料电池 /
- 甲醇氧化 /
- 石墨烯 /
- 电催化 /
- 喷雾干燥
Abstract: Three-dimensional graphene (PGO) was synthesized by spay-drying method.Pt/PGO catalyst was prepared through the improved liquid phase reduction method.The samples were characterized by XRD, BET and TEM.The results indicated that PGO was a three-dimensional crumpled structure material with 4-6 μm in length and 2.0-3.0 μm in width and the Pt nanoparticles with 4.2 nm were highly dispersed on the surface of PGO.The electro-catalytic activity and stability of the catalysts towards methanol electro-oxidation were investigated using cyclic voltammetry and chronoamperometry.The as-prepared Pt/PGO catalyst exhibits higher electro-catalytic activity and good stability during methanol electro-oxidation in comparison to Pt/GO catalysts.The enhanced catalytic performance is attributed to the high specific surface area of the 3D formation and utilization efficiency of Pt during methanol electro-oxidation.
- direct methanol fuel cell /
- methanol electro-oxidation /
- graphene /
- electro-catalysis /
- spay-drying

HTML全文

图 1 PGO、GO、Pt/PGO和Pt/GO催化剂的XRD谱图

Figure 1 XRD patterns of PGO,GO,Pt/PGO and Pt/GO catalyst

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图 2 PGO(a)和GO(b)载体的SEM照片

Figure 2 SEM images of PGO(a) and GO(b) carriers

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图 3 催化剂Pt/GO(a)和Pt/PGO(b)的TEM照片(c)和(d)分别为Pt粒子的粒径分布

Figure 3 TEM images of Pt/GO(a) and Pt/PGO(b), Pt particle size distributions of Pt/GO(c) and Pt/PGO(d)

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图 4 GO(a)和PGO(b)的FT-IR光谱谱图

Figure 4 FT-IR spectra of GO(a) and PGO(b)

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图 5 Pt/PGO和Pt/GO催化剂在0.5 mol/L H₂SO₄溶液中的循环伏安图

Figure 5 Cyclic voltammograms of Pt/PGO and Pt/GOcatalysts in 0.5 mol/L H₂SO₄ solutionat a scan rate of 50 mV/s

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图 6 Pt/PGO和Pt/GO催化剂在 0.5 mol/L H₂SO₄+1 mol/L CH₃OH 溶液中的循环伏安图

Figure 6 Cyclic voltagrammograms of methanol oxidation on Pt/PGO and Pt/GO catalysts in 0.5 mol/L H₂SO₄+ 1 mol/L CH₃OH at a scan rate of 50 mV/s

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图 7 Pt/PGO和Pt/GO催化剂对甲醇氧化的计时电流曲线

Figure 7 Chronoamperomtric curve of Pt/PGO 和 Pt/GO catalysts in 1 mol/L methanol+0.5 mol/L H₂SO₄ operation potential: 0.7 V

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表 1 Pt/PGO和Pt/GO催化剂对甲醇氧化性能

Table 1 Comparison of the activity of alcohols oxidation on Pt / PGO and Pt / GO catalysts

Catalyst Onset potential E/V ECSA A/(m²·g^-1) I_f/(mA·mg^-1Pt) I_f/I_b

Pt/PGO 0.40 89.5 756 1.00

Pt/GO 0.45 49.6 350 0.95

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