title: Perovskite-type catalytic materials for environmental applications.
abstract: Perovskites are mixed-metal oxides that are attracting much scientific and application interest owing to their low price, adaptability, and thermal stability, which often depend on bulk and surface characteristics. These materials have been extensively explored for their catalytic, electrical, magnetic, and optical properties. They are promising candidates for the photocatalytic splitting of water and have also been extensively studied for environmental catalysis applications. Oxygen and cation non-stoichiometry can be tailored in a large number of perovskite compositions to achieve the desired catalytic activity, including multifunctional catalytic properties. Despite the extensive uses, the commercial success for this class of perovskite-based catalytic materials has not been achieved for vehicle exhaust emission control or for many other environmental applications. With recent advances in synthesis techniques, including the preparation of supported perovskites, and increasing understanding of promoted substitute perovskite-type materials, there is a growing interest in applied studies of perovskite-type catalytic materials. We have studied a number of perovskites based on Co, Mn, Ru, and Fe and their substituted compositions for their catalytic activity in terms of diesel soot oxidation, three-way catalysis, N2O decomposition, low-temperature CO oxidation, oxidation of volatile organic compounds, etc. The enhanced catalytic activity of these materials is attributed mainly to their altered redox properties, the promotional effect of co-ions, and the increased exposure of catalytically active transition metals in certain preparations. The recent lowering of sulfur content in fuel and concerns over the cost and availability of precious metals are responsible for renewed interest in perovskite-type catalysts for environmental applications.
authors.affiliation: CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur-440 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur-440 020, India.
authors.forename: Nitin
authors.initials: N
authors.lastname: Labhasetwar
authors.affiliation: CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur-440 020, India.
authors.forename: Govindachetty
authors.initials: G
authors.lastname: Saravanan
authors.affiliation: CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur-440 020, India; Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No.189 Songling Road, 266101 Qingdao, People's Republic of China.
authors.forename: Suresh
authors.initials: S
authors.lastname: Kumar Megarajan
authors.affiliation: CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur-440 020, India.
authors.forename: Nilesh
authors.initials: N
authors.lastname: Manwar
authors.affiliation: CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur-440 020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur-440 020, India.
authors.forename: Rohini
authors.initials: R
authors.lastname: Khobragade
authors.affiliation: CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur-440 020, India.
authors.forename: Pradeep
authors.initials: P
authors.lastname: Doggali
authors.affiliation: Université de Rennes 1, UMR Institut des Science Chimiques de Rennes UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes, France; CNRS, LINK, UMI 3629, National Institute of Material Science, 1-1 Namiki, 305-0044, Tsukuba, Japan.
authors.forename: Fabien
authors.initials: F
authors.lastname: Grasset
keywords: catalyst; diesel soot; emission control; environmental catalysis; perovskite