Pt纳米颗粒在氮掺杂空心碳微球上的高分散负载及其氧还原性能

doi:10.3866/PKU.WHXB201304011

物理化学学报 >> 2013, Vol. 29 >> Issue (06): 1297-1304.doi: 10.3866/PKU.WHXB201304011

Pt纳米颗粒在氮掺杂空心碳微球上的高分散负载及其氧还原性能

张小华¹, 钟金娣¹, 于亚明¹, 张云松², 刘博³, 陈金华¹

1 湖南大学化学化工学院, 化学生物传感与计量学国家重点实验室, 长沙 410082;
2 四川农业大学生命科学与理学院, 雅安 625014;
3 西北有色金属研究院, 西安钛金工业电化学技术有限公司, 西安 710016

收稿日期:2012-10-25 修回日期:2013-04-01 发布日期:2013-05-17
通讯作者: 张小华, 刘博, 陈金华 E-mail:mickyxie@hnu.edu.cn; net_lb@163.com; chenjinhua@hnu.cn
基金资助:
长江学者和创新团队发展计划(PCSIRT); 湖南省自然科学基金(12JJ2010)及高等学校年轻教师成长计划(2012)和博士学科点专项科研基金(20110161110009)资助项目

Well-Dispersed Platinum Nanoparticles Supported on Nitrogen-Doped Hollow Carbon Microspheres for Oxygen-Reduction Reaction

ZHANG Xiao-Hua¹, ZHONG Jin-Di¹, YU Ya-Ming¹, ZHANG Yun-Song², LIU Bo³, CHEN Jin-Hua¹

1 State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China;
2 College of Life and Science, Sichuan Agricultural University, Yaan 625014, P. R. China;
3 Xi’an Taijin Industrial Electrochemical Technology Co., Ltd, Northwest Institute For Non-ferrous Metal Research, Xi’an 710016, P. R. China

Received:2012-10-25 Revised:2013-04-01 Published:2013-05-17
Supported by:
The project was supported by the Program for Changjiang Scholars and Innovative Research Team in University, China (PCSIRT), Hunan Provincial Natural Science Foundation, China (12JJ2010), Young Teachers? Growth Plan (2012), and Specialized Research Fund for the Doctoral Program of Higher Education, China (20110161110009).

摘要/Abstract

摘要：

通过热解自聚合多巴胺法制备了氮掺杂空心碳微球(N-HCMS), 并采用微波辅助乙二醇还原方法把Pt纳米粒子负载于N-HCMS上制得了Pt/N-HCMS催化剂. 催化剂的表面形貌、晶体结构及其比表面积和孔径分布等分别采用扫描电子显微镜、透射电子显微镜、X射线衍射仪及比表面分析仪等进行表征. 采用循环伏安法和线性扫描伏安法研究了Pt/N-HCMS 催化剂在酸性条件下的电催化氧还原性能. Pt/N-HCMS 催化剂由于Pt纳米粒子的均匀分散、N-HCMS载体的快速电子传递及其独特的微孔和中空结构而具有很高的电催化氧还原活性, 其质量比活性是E-TEK Pt/C 催化剂的近两倍. Pt/N-HCMS 催化剂还具有优良的稳定性. 本工作对于开发高性能的燃料电池阴极催化剂具有重要意义.

关键词: 氮掺杂, 空心碳微球, Pt纳米粒子, 电催化, 氧还原反应

Abstract:

Nitrogen-doped hollow carbon microspheres (N-HCMS) were synthesized by carbonization of poly(dopamine). Platinum (Pt) nanoparticles (NPs) were deposited onto the N-HCMS via a microwaveassisted reduction process. The morphology, surface area, and pore size distribution of the N-HCMS supported Pt catalysts (Pt/N-HCMS) were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and surface area and porosimetry measurements. The electrocatalytic properties of the Pt/N-HCMS catalyst towards oxygen-reduction reaction were investigated by cyclic voltammetry and linear sweep voltammetry. The Pt/N-HCMS catalyst showed almost double the specific mass activity of a commercial carbon supported Pt catalyst. This was attributed to a uniform dispersion of the Pt NPs and the unique mesoporous and hollow structure of N-HCMS. In addition, fast electron transfer processes were found to occur on the nitrogen doped N-HCMS and the catalyst exhibited excellent long-term stability. This work is of significance for the development of high-performance cathodic catalysts in fuel cells.

Key words: Nitrogen-doping, Hollow carbon microsphere, Pt nanoparticle, Electrocatalysis, Oxygen-reduction reaction

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张小华, 钟金娣, 于亚明, 张云松, 刘博, 陈金华. Pt纳米颗粒在氮掺杂空心碳微球上的高分散负载及其氧还原性能[J]. 物理化学学报, 2013, 29(06): 1297-1304.

ZHANG Xiao-Hua, ZHONG Jin-Di, YU Ya-Ming, ZHANG Yun-Song, LIU Bo, CHEN Jin-Hua. Well-Dispersed Platinum Nanoparticles Supported on Nitrogen-Doped Hollow Carbon Microspheres for Oxygen-Reduction Reaction[J]. Acta Phys. -Chim. Sin., 2013, 29(06): 1297-1304.

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201304011

https://www.whxb.pku.edu.cn/CN/Y2013/V29/I06/1297

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Pt纳米颗粒在氮掺杂空心碳微球上的高分散负载及其氧还原性能

Well-Dispersed Platinum Nanoparticles Supported on Nitrogen-Doped Hollow Carbon Microspheres for Oxygen-Reduction Reaction

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