School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore.
J Am Chem Soc. 2012 Aug 29;134(34):13934-7. doi: 10.1021/ja3051662. Epub 2012 Aug 20.
Noble metals such as platinum (Pt) are widely used as catalysts in fuel cells and other heterogeneous catalytic processes. However, there is an urgent need to develop substitutes for pure Pt catalysts to reduce the overall use of precious Pt and at the same time to enhance poisoning resistance. A promising strategy is to design Pt based bi- or trimetallic nanostructures because their unique structures and compositions would enhance their catalytic performance. In this study, we report the synthesis, characterization, and electrochemical evaluation of cubic intermetallic PtCu(3) nanocages. The influential effects of several important experimental parameters on the final products have been explored through systematic studies on the growth of PtCu(3) nanocages. Relative to the current commercial Pt electrocatalyst, these PtCu(3) nanocages possess a more accessible surface area and a unique hollow structure, which contribute to improved electrocatalytic activity in the methanol oxidation reaction.
贵金属如铂（Pt）被广泛用作燃料电池和其他多相催化过程中的催化剂。然而，迫切需要开发纯 Pt 催化剂的替代品，以减少对珍贵 Pt 的总体使用，并同时提高抗中毒能力。一种有前途的策略是设计基于 Pt 的双金属或三金属纳米结构，因为它们独特的结构和组成将提高它们的催化性能。在本研究中，我们报告了立方金属间化合物 PtCu(3)纳米笼的合成、表征和电化学评估。通过对 PtCu(3)纳米笼生长的系统研究，探讨了几个重要实验参数对最终产物的影响。与当前的商业 Pt 电催化剂相比，这些 PtCu(3)纳米笼具有更大的比表面积和独特的空心结构，有助于提高甲醇氧化反应的电催化活性。
