title: Environmentally-benign catalysts for the selective catalytic reduction of NO(x) from diesel engines: structure-activity relationship and reaction mechanism aspects.
abstract: Selective catalytic reduction of NOx using NH3 or hydrocarbons (NH3-SCR or HC-SCR) in oxygen-rich exhaust from diesel engines remains a major challenge in environmental catalysis. The development of highly efficient, stable and environmentally-benign catalysts for SCR processes is very important for practical use. In this feature article, the structure-activity relationship of vanadium-free catalysts in the NH3-SCR reaction is discussed in detail, including Fe-, Ce-based oxide catalysts and Fe-, Cu-based zeolite catalysts, which is beneficial for catalyst redesign and activity improvement. Based on our research, a comprehensive mechanism contributing to the performance of Ag/Al2O3 in HC-SCR is provided, giving a clue to the design of a catalytic system with high efficiency.
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P. R. China. honghe@rcees.ac.cn.
authors.forename: Fudong
authors.initials: F
authors.lastname: Liu
authors.forename: Yunbo
authors.initials: Y
authors.lastname: Yu
authors.forename: Hong
authors.initials: H
authors.lastname: He
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D000641:Ammonia / Q000737:chemistry*; D002384:Catalysis; D008958:Models, Molecular; D009569:Nitric Oxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D001335:Vehicle Emissions; D017641:Zeolites / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D010087:Oxides; D001335:Vehicle Emissions; D017641:Zeolites; D009569:Nitric Oxide; D000641:Ammonia