钯纳米颗粒在不同碳质材料上的自发沉积与电活性

孙丽枝; 易清风

钯纳米颗粒在不同碳质材料上的自发沉积与电活性

湖南科技大学化学化工学院, 湖南湘潭411201

基金项目: 国家自然科学基金(21376070);湖南省自然科学基金(14JJ2096);湖南省高校创新平台开放基金(11K023).

详细信息

作者简介:
孙丽枝,硕士. E-mail:sunlizhi86@126.com

通讯作者:
易清风,博士,教授. E-mail:yqfyy2001@hnust.edu.cn

中图分类号: O646
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- 被引次数: 0
出版历程
- 收稿日期: 2014-10-22
- 录用日期: 2015-05-04
- 修回日期: 2015-02-26
- 刊出日期: 2015-04-28

Spontaneous reduction of palladium chloride on surface of carbon materials to produce electrochemical catalysts for ethanol oxidation

School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

Funds: National Natural Science Foundation of China (21376070); Hunan Provincial Natural Science Foundation of China (14JJ2096); Scientific Research Fund of Hunan Provincial Education Department (11K023).

摘要

摘要: 在无还原剂存在下,氯化钯在Vulcan XC-72碳粉(C)、多壁碳纳米管(MWCNT)和碳球(CM)等碳质材料表面上自发还原为金属钯,从而得到相应的钯纳米颗粒(Pd-C、Pd-MWCNT和Pd-CM)。用阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)对这些碳质材料修饰后,采用同样的自发还原方法分别制备出Pd/CTAB-C、Pd/CTAB-MWCNT和Pd/CTAB-CM催化剂。结果表明,CTAB修饰后的MWCNT明显增加了钯纳米颗粒的自发沉积量,粒径大约为9 nm,而在MWCNT上沉积的纳米Pd粒径为19 nm。Pd/CTAB-MWCNT在碱性条件下对乙醇氧化的电流密度达到44.2 mA·cm^-2,与其他碳载体负载的Pd纳米催化剂相比,对乙醇氧化具有强而稳定的电催化活性。
- Pd纳米颗粒 /
- 自发沉积 /
- 多壁碳纳米管 /
- 表面活性剂 /
- 乙醇氧化
Abstract: Pd nanoparticles (Pd-NPs) were deposited on the surface of Vulcan XC-72 carbon black (CB), multi-walled carbon nanotubes (MWCNTs) and carbon spheres (CSs) by the spontaneous reduction of PdCl₂ with oxygen-functional groups on the carbon surfaces to produce catalysts for the electrochemical oxidation of ethanol. These carbons were also modified with a cationic surfactant (hexadecyltrimethyl ammonium bromide, CTAB) and subsequently used as supports for the deposition of Pd nanoparticles using the spontaneous reduction method. SEM, TEM and XRD were used to characterize their structures. Pd-NPs with a size of ca. 9 nm were obtained on the surface of the CTAB-modified MWCNTs. The amount of Pd-NPs spontaneously deposited on the CTAB-MWCNTs is much larger than that on the MWCNTs, CB or CSs. The Pd/CTAB-MWCNTs exhibit a higher anodic peak current density of 44.2 mA·cm^-2 in cyclic voltammetry, indicating a better electrocatalytic activity for ethanol oxidation than the other catalysts.
- Pd nanoparticle /
- Spontaneous deposition /
- Multi-walled carbon nanotube /
- Surfactant /
- Ethanol oxidation

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参考文献(17)

Dai X C. Palladium nanowires and application in cthanol fuel cell
[J]. Nanotechnology, 2010, 7(4): 13-15.

Li H Z, Shen J Z, Yang G X, et al. Anodic Pd catalyst in direct formic acid fuel cell and its electrocatalytic stability
[J]. Chemical Journal of Chinese Universities, 2011, 32(7): 1445-1450.

Shen P K, Xu C. Alcohol oxidation on nanocrystalline oxide Pd/C promoted electrocatalysts
[J]. Electrochem Commum, 2006, 8(1): 184-188.

Jeong G H, Kim S H, Kim M, et al. Direct synthesis of noble metal/graphene nanocomposites from graphite in water: photo-synthesie
[J]. Chem Commun, 2011, 47(16): 12236-12238.

Yi Q F, Niu F J, Sun L Z. Fabrication of novel porous Pd particles and their electroactivity towards ethanol oxidation in alkaline media
[J]. Fuel, 2011, 90(8): 2617-2623.

Shen S Y, Zhao T S, Xu J B, et al. Synthesis of PdNi catalysts for the oxidation of ethanol in alkaline direct ethanol fuel cells
[J]. J Power Sources, 2010, 195(4): 1001-1006.

Xu C, Shen P K, Liu Y. Ethanol electrooxidation on Pt/C and Pd/C catalysts promoted with oxide
[J]. J Power Sources, 2007, 164(2): 527-531.

Tominaka S, Toshiyuki M, Tetsuya O. Electrodeposited Pd-Co catalyst for direct methanol fuel cell electrodes: Prepartion and characterization
[J]. Electeochimica Acta, 2008, 53(14): 4679-4686.

Liu J P, Ye J Q, Xu C W, et al. Kinetics of ethanol electrooxidation at Pd electrodeposited on Ti
[J]. Electrochem Commun, 2007, 9(9): 2334-2339.

Wei Z D, Tan Y, Li L, et al. Spontaneous reduction of Pt (IV) salts on the sidewalls of functionalized multiwalled carbon nanotubes as catalysts for oxygen reduction reaction
[J]. J Phys Chem C , 2008, 112: 2671-2677.

周金梅, 李海燕, 林国栋, 等. 多壁碳纳米管的纯化及其表面含氧基团的表征
[J]. 物理化学学报, 2010, 26(11): 3080-3086. (Zhou Jin-mei, Li Hai-yan, Lin Guo-dong, et al. Purification of multiwalled carbon nanotubes and characterization of their oxygen-containing surface groups
[J]. Acta Phys-Chim Sin, 2010, 26(11): 3080-3086.)

Choi H C, Shim M, Bangsaruntip S, et al. Spontaneous reduction of metal ions on the sidewalls of carbon nanotubes
[J]. J Am Chem Soc, 2002, 124(31): 9058-9059.

Robinson D B, Fares S J, Ong M D, et al. Scalable synthesis of nanoporous palladium powders
[J]. I Int J Hydrogen Energ, 2009, 34: 5585-5591.

沈培康, 方翔, 宋树芹. 钯基醇氧化电催化剂的研究进展
[J]. 电源技术, 2009, 133(5): 351-358. (Shen Pei-kang, Fang Xiang, Song Shu-qin. Research progress of Pd-based electrocatalysts the oxidation of alcohol
[J]. Chinese Journal of Power Sources, 2009, 133(5): 351-358.)

肖奇, 王平华, 纪伶伶, 等. 分散剂CTAB对碳纳米管悬浮液分散性能的影响
[J]. 物理材料学报, 2007, 22(6): 1122-1126. (Xiao Qi, Wang Ping-hua, Ji Ling-ling, et al. Dispersion of carbon nanotubes in aqueous solution with cationic surfactant CTAB
[J]. J Inorg Mater, 2007, 22(6): 1122-1126.)

张永超. 碳微球的水热法合成及性能研究
[M]. 无机化学, 黑龙江大学, 2008. (Zhang Yong-chao. Synthesis of Carbon Micro-spheres by A Glucose Hydrothermal Method
[M]. Inorganic chemistry, Heilongjiang university, 2008.)

Krishna K M, Ramaprabhu S. Palladium dispersed multiwalled carbon nanotube based hydrogen hydrogrn sensor fornfuel cell applications
[J]. Int J Hydrogen Energ, 2007, 32: 2518-2526.

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