材料科学
催化作用
色散(光学)
化学工程
多元醇
乙二醇
合金
碳纳米管
悬挂(拓扑)
阴极
纳米颗粒
碳纤维
还原剂
纳米技术
复合材料
有机化学
化学
物理化学
聚氨酯
同伦
纯数学
数学
复合数
工程类
物理
光学
作者
Eirini Zagoraiou,Nivedita Shroti,Maria K. Daletou
标识
DOI:10.1016/j.mtchem.2020.100263
摘要
Pt alloys with transition metals supported on carbon substrates are used as improved cathode electrocatalysts for fuel cells. Enhanced catalytic activity is attributed to the structure (Pt-Pt bond distance) and/or electronic effect (Pt d-electron vacancy). This work focuses on the development of Pt3Co/f-MWCNT catalysts (functionalized multiwalled carbon nanotubes [f-MWCNT]) using ethylene glycol as the dispersing and reducing agent. The aim is to in parallel achieve fine dispersion, quantitative deposition and alloy formation. As described herein, the pH value of the reaction suspension has a critical effect on the composition and morphology of the synthesized nanoparticles. High pH values favor the formation of Pt3Co alloy, nevertheless negatively influencing the dispersion. A discussion is made on the reduction/deposition mechanism and how to control the conditions to result in optimum properties.
科研通智能强力驱动
Strongly Powered by AbleSci AI