Accessible mesoporous carbon aerogel preparation and its application as ultra-low pt support for oxygen reduction reaction with high catalytic activity

被引:6
作者
Luo, Yi [1 ]
Feng, Junzong [1 ]
Jiang, Yonggang [1 ]
Li, Liangjun [1 ]
Feng, Jian [1 ]
机构
[1] Natl Univ Def Technol, Sci & Technol Adv Ceram Fibers & Composites Lab, Coll Aerosp Sci & Engn, 109 De Ya Rd, Changsha 410073, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
Carbon aerogel; Accessible mesoporous pores; Pt support; Oxygen reduction reaction; Pemfcs;
D O I
10.1007/s10934-020-01010-y
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Carbon supported Pt and its alloys (Pt/C) are the most practical catalysts for oxygen reduction reaction (ORR). To further reduce scare Pt content in the Pt/C is of great importance for its widely application. Carbon substrate plays a critical role in decreasing Pt proportion. In this research, accessible pores carbon aerogel is prepared to be support for Pt nanoparticles by sol-gel method. A mild reduction agent H-2 is choose to produce ultra-small Pt nanoparticles with only 1.5 nm diameter. The carbon aerogel could lower Pt to be ultra-low content of 4.2% mass percentage. Ultra-small Pt nanoparticles are uniformly dispersed on the carbon aerogel, which is significant for improving Pt utilization and catalytic performance. The Pt/carbon aerogel, is of high ORR catalytic activity with electrochemical surface area 188 m(2) g(Pt)(-1), mass activity 107 mA mg(Pt)(-1) and low Tafel slope 47.87 mV dec(-1), which could be ascribed to carbon aerogel support with high mesoporous surface area of 500 m(2)/g. Pt/carbon aerogel were comprehensively studied by N-2 adsorption/desorption, SEM, TEM, XPS and XRD to reveal relations between properties and structures. Based on the research results, the Pt/carbon aerogel is a kind of promising low Pt catalyst for ORR.
引用
收藏
页码:661 / 672
页数:12
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