物理化学学报2017，Vol.33Issue(9)：1838-1845,8.DOI:10.3866/PKU.WHXB201705052
管径对碳纳米管负载铂催化剂氧还原的影响
Effect of the Diameter of Carbon Nanotubes Supporting Platinum Nanoparticles on the Electrocatalytic Oxygen Reduction
摘要
Abstract
A series of nanocatalysts consisting of acid treated carbon nanotubes (CNTs) with different diameters (8-15,20-30,30-50,＞50 nm) supporting platinum (Pt) nanoparticles (PtJCNTs) were synthesized via a microwave-assisted ethylene glycol method.The as-synthesized catalysts were characterized by X-ray photoelectron spectroscopy (XPS),X-ray diffraction (XRD),thermogravimetric analysis (TGA),and transmission electron microscopy (TEM).Their catalytic performances in the oxygen reduction reaction (ORR) were evaluated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV).The experimental results showed that the diameter of the CNTs influences the particle size,loading,and dispersion of Pt NPs.Furthermore,the Pt/CNTs having different CNT diameters displayed different catalytic activities in the ORR.The catalyst Pt/CNT8,which was prepared by using CNTs with diameters ranging between 8-15 nm as the support,exhibited the highest Pt loading,catalytic activity,and stability in the ORR.The mass activity of Pt/CNT8 was determined to be 0.188 A.mg-1 at 0.9 V,which is folds higher than that of the commercially available JM Pt/C catalyst.After testing the stability for 5000 potential cycles,the negative shift (～7 mV) of the half-wave potential for Pt/CNT8 was found to be significantly lesser than that for the JM Pt/C catalyst (～32 mV),indicating superior catalytic stability.关键词
微波辅助/铂/碳纳米管/管径效应/稳定性Key words
Microwave-assistance/Platinum/Carbon nanotubes/Diameter effect/Stability分类
化学化工引用本文复制引用
于景华,李文文,朱红..管径对碳纳米管负载铂催化剂氧还原的影响[J].物理化学学报,2017,33(9):1838-1845,8.基金项目
The project was supported by the Beijing Municipal Science and Technology Program,China (Z171100000917019),the National Key Research and Development Program of China (2016YFB0101203),the National Natural Science Foundation of China (21376022,21476020),International S&T Cooperation Program of China (2013DFA51860),and Fundamental Research Funds for the Central Universities,China (JC1504).北京市科技计划(Z171100000917019),国家重点基础研究发展计划(2016YFB0101203),国家自然科学基金(21376022,21476020),国际科技合作项目(2013DFA51860)和中央高校基本科研业务费(JC1504)资助 （Z171100000917019）
