High Performance Nanocatalysts Supported on Micro/Nano Carbon Structures Using Ethanol Immersion Pretreatment for Micro DMFCs

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Lin, Liang-You^1 ; Wu, Yi-Shiuan^1 ; Chang, Chaun^1 ; Tseng, Fan-Gang^1,2,3

Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan^1

Institute of Nano Engineering and Micro Systems, National Tsing Hua University, Hsinchu, Taiwan^2

Division of Mechanics, Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan^3

关键词: Acidic treatment;    Carbon structures;    Electrocatalytic reactions;    Methanol oxidation reactions;    Oxygen-containing functional groups;    Peak current density;    Performance improvements;    Sulfuric acid treatment;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012064/pdf
DOI  :  10.1088/1742-6596/476/1/012064

来源: IOP

【 摘 要 】

In this paper, highly dense platinum (Pt) nanocatalysts were successfully deposited on the hydrophilically-treated nano/micro carbon supports with an ethanol (EtOH) immersion pretreatment and an acidic treatment for the performance improvement of methanol oxidation reaction (MOR). In order to thoroughly immerse the three-dimensional, interwoven structures of the carbon cloth fibers with a 6 M sulfuric acid surface modification, which increasing more oxygen-containing functional groups on the surfaces of the carbon supports, the EtOH immersion pretreatment of the carbon supports was utilized prior to the sulfuric acid treatment. Subsequently, Pt catalysts were reduced on the modified carbon supports by a homemade open-loop reduction system (OLRS) [1] For comparisons, carbon cloth (CC) and carbon nanotube on CC (CNT/CC) supports were employed with and without EtOH immersion pretreatments before Pt catalyst reduction. In the cyclic voltammetry (CV) curves, the electrosorption charges of hydrogen ion (QH) and the peak current density (IP) of the fabricated Pt/CC and Pt/CNT/CC electrodes with the EtOH immersion pretreatments can efficiently be enhanced due to more active Pt sites for electrocatalytic reactions.