Scientists from University of Birmingham have prepared a Pt mosaic nanoparticles. As the shape of the particle resembles Christmas snowman, and the "nano snowman" in green energy and medical care show a strong function and attracted wide attention.
The aberration-corrected scanning transmission electron microscopy (TEM) of the Nano-scale Physical Chemistry and Engineering Research Laboratory at the University of Birmingham showed that the nano-snowman had a size of only 5 nm.
Surprisingly, such a small size of the snowman is actually due to nano platinum-titanium nanoparticles in the air from the self-assembly. In this process, the titanium is oxidized into titanium dioxide, which constitutes the face of the nano snowman, composed of metal platinum clusters of eyes, nose and mouth are embedded in them.
Although the nano-snowman looks hip-hop, but its performance as a fuel cell catalyst in the preparation of green hydrogen in the electrolysis of water is unequivocal, showing a highly efficient catalytic performance, fully illustrated titanium-containing platinum nano-catalyst in the field of green energy Advantage.
Nano platinum, due to its powerful function in chemical conversion, has become a popular metal material in the scientific community. However, platinum is expensive, low reserves, limiting its large-scale applications. The special structure of nano-snowman through the introduction of titanium atoms, both to reduce the use of precious metal platinum, but also effectively prevent the sintering of nanoparticles (or reunion).
Professor Richard Palmer, a leading scientist in the field of nanoparticle science and director of the National Center for Nanoscience and Nanoscience Research at the National University of Science and Technology, explains: "The Nano Snowman" has a wide range of concerns in the energy and pharmaceutical industries: By assembling titanium and platinum atoms to form nano-particles, it can reduce the consumption of precious metals and rare materials, platinum, but also to maintain its original performance.This study may be the preparation of green hydrogen in the hydrogen, the use of low-energy electron radiation therapy Kill cancer cells and produce drugs through chemical conversion and other aspects have an important impact.
Saeed Gholhaki, another inventor of the Nano Snowman, said: "Nanomaterials are the skeletons that make up nanostructures, which are shaped by the laws of nature to form peculiar shapes and structures, which controls the appearance of the material, so that we can design the material to obtain the nature we want, and sometimes these skeletons (in this case Pt) can be assembled in an interesting way into what we are familiar with , such as this snowman. "
by Corrine
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