The controlled disassembly of mesostructured perovskites as an avenue to fabricating high performance nanohybrid catalysts
MetadataShow full item record
© The Author(s) 2017. Versatile superstructures composed of nanoparticles have recently been prepared using various disassembly methods. However, little information is known on how the structural disassembly influences the catalytic performance of the materials. Here we show how the disassembly of an ordered porous La0.6Sr0.4MnO3 perovskite array, to give hexapod mesostructured nanoparticles, exposes a new crystal facet which is more active for catalytic methane combustion. On fragmenting three-dimensionally ordered macroporous (3DOM) structures in a controlled manner, via a process that has been likened to retrosynthesis, hexapod-shaped building blocks can be harvested which possess a mesostructured architecture. The hexapod-shaped perovskite catalyst exhibits excellent low temperature methane oxidation activity (T90%=438 °C; reaction rate=4.84 × 10−7 mol m−2 s−1). First principle calculations suggest the fractures, which occur at weak joints within the 3DOM architecture, afford a large area of (001) surface that displays a reduced energy barrier for hydrogen abstraction, thereby facilitating methane oxidation.
Showing items related by title, author, creator and subject.
Tan, Y.; Song, Y.; Liu, Xin; Wang, X.; Cheng, J. (2016)© 2017 Elsevier B.V.Offshore oil and gas platforms (OOGPs) usually have a lifetime of 30-40. years. An increasing number of OOGPs across the world will be retired and decommissioned in the coming decade. Therefore, a safe ...
Insight the C-Site Pocket Conformational Changes Responsible for Sirtuin 2 Activity Using Molecular Dynamics SimulationsSakkiah, Sugunadevi; Arooj, Mahreen; Ping Cao, Guang; Woo Lee, Keun (2013)Sirtuin belongs to a family of typical histone deacetylase which regulates the fundamental cellular biological processes including gene expression, genome stability, mitosis, nutrient metabolism, aging, mitochondrial ...
Pick, David; Dayaram, Kandy (2006)Purpose - this paper aims to explore the re-interpretation and justification of caste in India in the face of modernising influences and the efforts of legislators to disassemble its structures and traditions.Approach - ...