铂金
催化作用
材料科学
电解质
耐久性
铂纳米粒子
化学工程
碳纳米管
电导率
纳米技术
电极
复合材料
化学
有机化学
物理化学
工程类
作者
Nibret Gebeyehu Akalework,Chun‐Jern Pan,Wei‐Nien Su,John Rick,Ming‐Jong Tsai,Jyh‐Fu Lee,Jhih‐Min Lin,Li‐Duan Tsai,Bing‐Joe Hwang
摘要
The sluggish kinetics of the oxygen reduction reaction (ORR), the instability of platinum on the carbon support, and carbon corrosion are still critical issues affecting the activity and long-term durability of polymer electrolyte membrane fuel cells. An ideal solution would be to modify the catalytic supports to enhance the durability and performance of supported catalysts. Here we have synthesized multiwalled carbon nanotube (MWCNT) supported ultrathin TiO2 films (MWCNT@UT-TiO2) using a simple modified sol–gel method. Our approach takes advantage of the strong metal support interactions (SMSIs) between the MWCNT@UT-TiO2 support and platinum nanoparticles, which results in a decrease of the d-band vacancy of platinum due to electron transfer from the support, thereby enhancing the performance of the supported catalysts. Our results revealed that Pt–MWCNT@UT-TiO2 has better catalytic activity and durability compared to Pt–MWCNT and Pt–C with equivalent Pt loadings.
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