Development of the environment-tolerant catalyst can contribute to pollutant treatment in extreme environment. In the present work, precursor of the silicate-decorated titania (SiO_x-TiO₂) was prepared by incorporating silica into hydrothermal synthesis of TiO₂ nanowire (TNT). After loading Pt nanoparticles by impregnation, the as-prepared catalyst (Pt/SiO_x-TiO₂) possessed 7.2 times and 13.6 times the HCHO decomposition rate of Pt/TNT and conventional Pt/TiO₂, respectively, at the temperature of 30 °C and the relative humidity of ∼5 %. Structure-performance relationship analyses showed that the excellent catalytic performance of Pt/SiO_x-TiO₂ was closely related to the presence of silicate and formation of sodium-stabilized Pt nanoparticles. The heterogeneously decorated silicate in Pt/SiO_x-TiO₂ had the excellent ability of capturing water from environment and even from HCHO decomposition itself. Consequently, the sodium-stabilized Pt nanoparticles of Pt/SiO_x-TiO₂ could be maintained in a wet microenvironment to exhibit the excellent HCHO decomposition performance in low temperature and dry environment.

耐环境催化剂的开发可有助于极端环境下的污染物处理。在目前的工作中，通过将二氧化硅掺入TiO ₂纳米线（TNT）的水热合成中来制备硅酸盐修饰的二氧化钛的前体（SiO _x -TiO ₂）。通过浸渍负载Pt纳米颗粒后，所制得的催化剂（Pt / SiO _x -TiO ₂）在30°C的温度下分别具有Pt / TNT和常规Pt / TiO ₂的HCHO分解速率的7.2倍和13.6倍。C，相对湿度约为5％。结构-性能关系分析表明，Pt / SiO _x -TiO ₂具有优异的催化性能与硅酸盐的存在和钠稳定的铂纳米颗粒的形成密切相关。Pt / SiO _x -TiO _2中异质装饰的硅酸盐具有从环境甚至从HCHO分解本身捕获水的出色能力。因此，可以将Pt / SiO _x -TiO ₂的钠稳定化的Pt纳米颗粒保持在潮湿的微环境中，以在低温和干燥环境下表现出优异的HCHO分解性能。