Synthesis of Mesoporous Pt Films with Tunable Pore Sizes from Aqueous Surfactant Solutions
Synthesis of Mesoporous Pt Films with Tunable Pore Sizes from Aqueous Surfactant Solutions
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DOI：
10.1021/cm300054b
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发表时间：
2012-05-08
影响因子：
8.6
通讯作者：
Yamauchi, Yusuke
中科院分区：
文献类型：
--
作者：
Wang, Hongjing;Wang, Liang;Yamauchi, Yusuke
铂（Pt）广泛用作电池电极、化工催化剂和工业废气分解催化剂。对稀有铂日益增长的需求和非常有限的供应是世界上一个严重的问题。在此，我们提出了一种新的合成方法，通过增加Pt的表面积和改变Pt的表面结构来减少Pt在催化体系中的使用。在表面活性剂水溶液中采用电化学镀法制备了孔径在5 ~ 30 nm之间的几种介孔Pt薄膜。介孔壁由直径约为3nm的Pt纳米颗粒组成。Pt的原子结晶度在多个Pt纳米颗粒上连续延伸，显示出大量的原子步长，可以加速甲醇氧化反应。由于高表面积和独特的Pt表面，我们的介孔Pt薄膜表现出作为优越电催化剂的高潜力。
Platinum (Pt) is widely used as battery electrodes, catalysts for chemicals, and catalysts for exhaust gas decomposition in industries. Increasing need and very limited supply of rare Pt is a serious problem in the world. Here, we propose new synthetic way for reducing the use of Pt in a catalytic system by increasing the surface area and modifying the Pt surface structure. Several types of mesoporous Pt films with different pore sizes ranging from 5 to 30 nm are prepared by electrochemical plating in aqueous surfactant solutions. The mesopore walls are composed of connected Pt nanoparticles with around 3 nm in diameter. The Pt atomic crystallinity is coherently extending across over several Pt nanoparticles, showing a large number of atomic steps, which can accelerate methanol oxidation reaction. As a result of a high surface area and unique Pt surface, our mesoporous Pt film exhibits high potentiality as a superior electrocatalyst.