King Jeffrey S, Wittstock Arne, Biener Juergen, Kucheyev Sergei O, Wang Yinmin M, Baumann Theodore F, Giri Sandeep K, Hamza Alex V, Baeumer Marcus, Bent Stacey F
Department of Chemical Engineering, Stanford University, 381 North South Mall, Stanford, California 94305, USA.
Nano Lett. 2008 Aug;8(8):2405-9. doi: 10.1021/nl801299z. Epub 2008 Jul 18.
Using atomic layer deposition (ALD), we show that Pt nanoparticles can be deposited on the inner surfaces of carbon aerogels (CA). The resultant Pt-loaded materials exhibit high catalytic activity for the oxidation of CO even at loading levels as low as approximately 0.05 mg Pt/cm2. We observe a conversion efficiency of nearly 100% in the 150-250 degrees C temperatures range, and the total conversion rate seems to be limited only by the thermal stability of the CA support in ambient oxygen. The ALD approach described here is universal in nature, and can be applied to the design of new catalytic materials for a variety of applications, including fuel cells, hydrogen storage, pollution control, green chemistry, and liquid fuel production.
我们通过原子层沉积（ALD）技术表明，铂纳米颗粒可以沉积在碳气凝胶（CA）的内表面。所得的负载铂材料即使在低至约0.05 mg Pt/cm²的负载水平下，对CO氧化也表现出高催化活性。我们观察到在150 - 250摄氏度温度范围内的转化效率接近100%，并且总转化率似乎仅受CA载体在环境氧气中的热稳定性限制。这里描述的ALD方法本质上具有通用性，可应用于设计用于各种应用的新型催化材料，包括燃料电池、储氢、污染控制、绿色化学和液体燃料生产。
