Platinum nanoparticles on carbon-nanotube support prepared by room-temperature reduction with H2 in ethylene glycol/water mixed solvent as catalysts for polymer electrolyte membrane fuel cells
| Autor: | Yuying Zheng, Xin Wu, Shijun Liao, Muwu Li, Dou Zhengjie, Yanxiong Fang, Zhaohui Hou, Jianhuang Zeng |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Materials science Renewable Energy Sustainability and the Environment Inorganic chemistry Energy Engineering and Power Technology 02 engineering and technology Electrolyte Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Platinum nanoparticles Electrocatalyst 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Polyol Methanol Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Ethylene glycol |
| Zdroj: | Journal of Power Sources. 306:448-453 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2015.12.077 |
| Popis: | Polyol approach is commonly used in synthesizing Pt nanoparticles in polymer electrolyte membrane fuel cells. However, the application of this process consumes a great deal of time and energy, as the reduction of precursors requires elevated temperatures and several hours. Moreover, the ethylene glycol and its oxidizing products bound to Pt are difficult to remove. In this work, we utilize the advantages of ethylene glycol and prepare Pt nanoparticles through a room-temperature hydrogen gas reduction in an ethylene glycol/water mixed solvent, which is followed by subsequent harvesting by carbon nanotubes as electrocatalysts. This method is simple, facile, and time-efficient, as the entire room-temperature reduction process is completed in a few minutes. As the solvent changes from water to an ethylene glycol/water mix, the size of Pt nanoparticles varies from 10 to 3 nm and their shape transitions from polyhedral to spherical. Pt nanoparticles prepared in a 1:1 volume ratio mixture of ethylene glycol/water are uniformly dispersed with an average size of ∼3 nm. The optimized carbon nanotube-supported Pt electrocatalyst exhibits excellent methanol oxidation and oxygen reduction activities. This work demonstrates the potential use of mixed solvents as an approach in materials synthesis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect