College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
College of Science, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, PR China.
J Colloid Interface Sci. 2019 Nov 15;556:441-448. doi: 10.1016/j.jcis.2019.08.085. Epub 2019 Aug 24.
Direct fuel cells are regarded as the most portable device for alleviating the problems of the energy dilemma and environmental disruption. Although direct fuel cells have a number of advantages, the lack of highly-efficient anode catalysts inhibits their wide application. To address this challenge, we report a facile one-pot method to fabricate a series of ultrathin platinum-cobalt (Pt-Co) nanowires with different proportions. The as-prepared catalysts all have one-dimensional ultrathin nanowire structures with high yields. Among all these catalysts, the ultrathin PtCo nanowires with optimized compositions, whose diameters are 1.8 nm on average, show the best catalytic activity for the glycerol oxidation reaction in alkaline conditions, and their mass and specific activities reach 4573.0 mA mg and 11.9 mA cm, which are 5.4 and 3.6 times higher than those of commercial Pt/C catalysts, respectively. The as-obtained PtCo nanowires are also the most durable nanowires according to long-term stability tests. This method may provide guidelines for the preparation of other Pt-based bimetallic nanowires, which could somewhat accelerate the development and commercialization of catalysts for fuel cells.
直接燃料电池被认为是缓解能源危机和环境破坏问题的最便携设备。尽管直接燃料电池有许多优点，但缺乏高效的阳极催化剂限制了它们的广泛应用。为了解决这一挑战，我们报告了一种简便的一锅法来制备一系列具有不同比例的超薄铂钴（Pt-Co）纳米线。所制备的催化剂均具有一维超薄纳米线结构，产率高。在所有这些催化剂中，优化组成的超薄 PtCo 纳米线在碱性条件下对甘油氧化反应表现出最佳的催化活性，其质量和比活性分别达到 4573.0 mA mg 和 11.9 mA cm，分别是商业 Pt/C 催化剂的 5.4 和 3.6 倍。根据长期稳定性测试，所获得的 PtCo 纳米线也是最耐用的纳米线。这种方法可能为制备其他基于 Pt 的双金属纳米线提供指导，从而加速燃料电池催化剂的开发和商业化。
