Platinum Oxide Nanoparticles

Platinum oxide (PtO₂) has been an important metal oxide compound in various different industries. α- PtO₂ β - PtO₂ are the two stable phases of PtO_2. The α- PtO₂ has a stable hexagonal structure, a needle-like shape with 6 nm diameter and a length of approximately 50 nm under ambient pressure. The β - PtO₂ has an orthorhombic structure under high pressures. Platinum oxide nanoparticles have been utilized as heterogeneous catalysts due to their excellent catalytic activity. PtO₂ is widely known as the Adams’ catalyst in the industry. The Adam’s catalyst consists mostly of crystalline α-PtO2 phase. The Adam’s catalyst has a surface area of about 80 m² /gm; it usually consists of flakes, platelets, powders, and nano-ribbons. Amongst the reactions catalyzed by PtO₂; hydrogenation, oxidation, and reduction reactions are the prominent ones. In addition to these catalyst applications, PtO₂ nanoparticles are also used in electrochemistry, photochemistry, biosensors, gas sensors, and passivation of high-Tc superconductors.