Wang Shuangyin, Wang Xin, Jiang San Ping
School of Chemical and Biomedical Engineering, and School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore.
Langmuir. 2008 Sep 16;24(18):10505-12. doi: 10.1021/la800925t. Epub 2008 Aug 9.
A new synthesis method for the preparation of high-performance PtRu electrocatalysts on multiwalled carbon nanotubes (MWCNTs) is reported. In this method, bimetallic PtRu electrocatalysts are deposited onto 1-aminopyrene (1-AP)-functionalized MWCNTs by a microwave-assisted polyol process. The noncovalent functionalization of MWCNTs by 1-AP is simple and can be carried out at room temperature without the use of expensive chemicals or corrosive acids, thus preserving the integrity and the electronic structure of MWCNTs. PtRu electrocatalysts on 1-AP-functionalized MWCNTs show much better distribution with no formation of aggregates, higher electrochemically active surface area, and higher electrocatalytic activity for the electrooxidation of methanol in direct methanol fuel cells as compared to that on conventional acid-treated MWCNTs and carbon black supported PtRu electrocatalysts. PtRu electrocatalysts on 1-AP-functionalized MWCNTs also show significantly enhanced stability.
报道了一种在多壁碳纳米管（MWCNTs）上制备高性能PtRu电催化剂的新合成方法。在该方法中，通过微波辅助多元醇工艺将双金属PtRu电催化剂沉积到1-氨基芘（1-AP）功能化的MWCNTs上。1-AP对MWCNTs的非共价功能化简单，可在室温下进行，无需使用昂贵的化学物质或腐蚀性酸，从而保持了MWCNTs的完整性和电子结构。与传统酸处理的MWCNTs和炭黑负载的PtRu电催化剂相比，1-AP功能化MWCNTs上的PtRu电催化剂分布更好，无聚集体形成，具有更高的电化学活性表面积以及对直接甲醇燃料电池中甲醇电氧化更高的电催化活性。1-AP功能化MWCNTs上的PtRu电催化剂还表现出显著增强的稳定性。
