Correlation between catalytic activities and internal atomic structure of baimetallic nanoparticles containing platinum

我们开发了一种新的一锅法制备含铂和M(Ru，Cu，Co，Ni，Sn等)的双金属纳米颗粒的方法。在陶瓷或碳颗粒上负载的几个纳米。用加速电子束辐照含有两种金属离子和载体粒子的水溶液。水辐解产生的自由基将这些离子还原成稳定在载体上的金属纳米颗粒。由于还原过程进行得很快，合金纳米颗粒可以克服这两种元素之间的氧化还原电位差距。从核-壳到合金，双金属结构各不相同。贱金属以氧化物的形式析出，但由合金和氧化物形成的贱金属较少，从而产生更复杂的结构。我们考察了样品的结构并评价了它们的催化活性，以证明它们作为催化剂的优势。

We developed a new one-pot method for producing bimetallic nanoparticles containing Pt and M (Ru, Cu, Co, Ni, Sn etc.) of a few nm supported on ceramics or carbon particles. Aqueous solution containing ions of two metals and support particles was irradiated with an accelerated electron beam. Radicals generated from the water radiolysis reduce these ions to form metallic nanoparticles stabilized on the support. Since the reduction proceeds quickly, alloy nanoparticles may be produced overcoming the redox potential gap between the two elements. The bimetallic structure varied from core-shell to alloy. Base metal precipitates as oxide, but less base metal formed both of alloy and oxide, giving more complex structures. We examined structures and evaluated catalytic activities of the samples to demonstrate their advantages as the catalysis.