The catalytic purification of automobile exhaust gases (CO, NOx and hydrocarbons) is one of the most practiced conversion processes used to lower the emissions and to reduce the air pollution. Nevertheless, the good performance of exhaust gas purification catalysts often requires the high consumption of noble metals such as platinum. Here we report that the Brønsted acid sites on the external s...

Abstract. SAPO-34 and ZnAPO-34 materials (Zn incorporated by isomorphic substitution in AlPO-34 material) were synthesized hydrothermal synthesis using triethylamine (TEA) as the structure directing agent (SDA). The presented both is to chabazite zeolite (CHA). However, they have different properties such textural (Z34 S34 a surface area of ​​485 603 m2/g, respectively), crystal sizes acid prop...