Zuo Yunpeng, Wu Long, Cai Kai, Li Tingting, Yin Wenmin, Li Dian, Li Na, Liu Jiawei, Han Heyou
State Key Laboratory of Agricultural Microbiology, College of Science Huazhong Agricultural University, Wuhan 430070, P.R. China.
ACS Appl Mater Interfaces. 2015 Aug 19;7(32):17725-30. doi: 10.1021/acsami.5b03826. Epub 2015 Aug 7.
Dentritic Pt-based nanomaterials with enriched edge and corner atoms have recently attracted considerable attention as electrocatalysts. Meanwhile, Pt(111) facets are generally considered more active for the glycerol oxidation reaction (GOR). Thus, it is significant to construct the rational design and synthesis of dentritic Pt whose surface is mostly enclosed by {111} facets. Reported herein is a unique Pt-branched structure enriched by a large amount of valency unsaturated atoms prepared by the aggravation of the galvanic replacement strategy. The synthesis is developed to generate highly crystallized Pt nanoflowers using Te nanowires as a template. Furthermore, the electrochemical results show that Pt nanoflower is an excellent catalyst with higher mass activity and better structure stability than commercial Pt/C (20% Pt) for glycerol electro-oxidation. Besides, the template-broken approach could provide a novel potential way to synthesize Pt-based or other noble metals/alloys for their advanced functional applications.
具有丰富边缘和角原子的树枝状铂基纳米材料作为电催化剂最近引起了相当大的关注。同时，Pt(111)面通常被认为对甘油氧化反应（GOR）更具活性。因此，构建表面大部分被{111}面包围的树枝状铂的合理设计和合成具有重要意义。本文报道了一种独特的铂分支结构，通过强化电化学生成策略制备，该结构富含大量价态不饱和原子。该合成方法是利用碲纳米线作为模板来生成高度结晶的铂纳米花。此外，电化学结果表明，铂纳米花是一种优异的催化剂，在甘油电氧化方面比商业Pt/C（20% Pt）具有更高的质量活性和更好的结构稳定性。此外，模板破碎法可为合成铂基或其他贵金属/合金以实现其先进功能应用提供一种新的潜在方法。
