Co修饰的碳载Pt纳米粒子催化剂的制备与表征

材料导报

2021, Vol. 35

Issue (z2): 306-310

金属与金属基复合材料

Co修饰的碳载Pt纳米粒子催化剂的制备与表征

吴国玉^1,2, 郑晔³, 王明涌², 邢志军³

1 中国黄金集团有限公司,北京 100011
2 北京科技大学钢铁冶金新技术国家重点实验室,北京 100083
3 长春黄金研究院有限公司,长春 130012

Preparation and Characterization of Cobalt Modified Carbon Supported Platinum Nanoparticles Catalysts

WU Guoyu^1,2,ZHENG Ye³, WANG Mingyong², XING Zhijun³

1 China National Gold Group Co., Ltd., Beijing 100011, China
2 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
3 Changchun Gold Research Institute Co.,Ltd.,Changchun 130012, China

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摘要质子交换膜燃料电池阴极需要使用高活性的电催化剂来加速氧还原反应(ORR)速率,而提高活性成分贵金属铂(Pt)的功能反应利用率可解决其关键问题。本工作利用过渡金属钴Co(Ⅱ)-有机框架(Co-MOF)为前驱体合成ORR催化剂载体Co/C,并采取浸渍-液相还原法负载Pt纳米粒子制备了合金Pt-Co/C催化剂。通过对样品的孔隙结构、物相结构、微观形貌等表征,证实了载体Co/C具有较大的比表面积和相互连通的分级介孔结构,其独特的形貌、丰富的孔隙结构使负载的Pt纳米颗粒均匀分布、粒径范围窄,平均粒径约为6.8 nm。进一步对催化剂进行电化学性能评价,其电化学活性表面积(ECSA)接近于商用Pt/C催化剂的值,结果表明合金催化剂中活性成分Pt具有较高的利用率,同时还表现出载体独特的孔隙结构优势。

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	吴国玉
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关键词: 质子交换膜燃料电池金属有机框架 Pt-Co合金氧还原反应

Abstract: The cathode of proton exchange membrane fuel cells need to use highly active electrocatalyst to accelerate the oxygen reduction reaction (ORR), and the key problem can be solved by improving the functional reaction utilization rate of the active component precious metal platinum. In this work, the ORR catalyst carrier Co/C was prepared through the transition metal cobalt-organic framework (Co-MOF) as the precursor, and the alloy Pt-Co/C catalysts was prepared by impregnation-liquid phase reduction method. The pore structure, phase structure, micro-morphology and electrochemical properties of the samples were characterized and analyzed. The results show that the carrier Co/C has high specific surface area and interconnected hierarchical meso-porous structure. Its unique morphology and rich pore structure make the loaded platinum nanoparticles uniformly distributed, the particle size distribution range is narrow, and the average particle size is about 6.8 nm. Its electrochemical active surface area (ECSA) is close to the value of commercial Pt/C catalyst, which indicates that the active component platinum has high utilization rate in the alloy catalyst, meanwhile it shows the unique pore structure advantage of the carrier.

Key words: proton exchange membrane fuel cell metal-organic framework Pt-Co alloy oxygen reduction reaction

发布日期: 2021-12-09

ZTFLH:

TB321

通讯作者: wuguoyuspring@163.com

作者简介: 吴国玉,中国黄金集团有限公司,博士后。2019年获中南大学博士学位。主要从事稀贵金属湿法冶金、冶金过程数值模拟与优化以及冶金材料的制备与性能应用等方面的研究工作。发表学术论文和发明专利共10余篇。

引用本文:

吴国玉, 郑晔, 王明涌, 邢志军. Co修饰的碳载Pt纳米粒子催化剂的制备与表征[J]. 材料导报, 2021, 35(z2): 306-310.
WU Guoyu,ZHENG Ye, WANG Mingyong, XING Zhijun. Preparation and Characterization of Cobalt Modified Carbon Supported Platinum Nanoparticles Catalysts. Materials Reports, 2021, 35(z2): 306-310.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2021/V35/Iz2/306

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