In general, the compounds with low-valent transition metal cations have metallic characteristics due to the partially filled d orbitals [30, 47, 48, 49].
The best electrocatalysts for oxygen evolution in acid solutions consist of noble metals which form oxide films (RuO2, IrO2) possessing metallic characteristics.
Astatine has some metallic characteristics as well, such as plating onto a cathode, coprecipitating with metal sulfides in hydrochloric acid, and forming a cation in strong acidic solutions, and complexes with EDTA, a chelating agent.
Attached to ceilings and corners, many of the spidery, lacy webs have golden, metallic characteristics that lend considerable beauty to something normally disdained.
Two modifications of polonium are known, an α- and a β-form, both of which are stable at room temperature and possess metallic characteristics.
The aggregates are composed of primary particles of carbon and of metallic characteristics.
The metallic characteristics and small crystallites of MoO2 not only favor ionic/electronic transport, but also shorten the diffusion length.
The redundancy analysis (RDA) revealed that both urbanization and reclamation processes would cause similar metallic characteristics, and sediment organic matter (SOC) might be the prominent influencing factor.
