ZrO2 Acting as a Redox Catalyst
Kauppi, E. I., Honkala, K., Krause, A. O. I., Kanervo, J. M., & Lefferts, L. (2016). ZrO2 Acting as a Redox Catalyst. Topics in Catalysis, 59(8), 823-832. https://doi.org/10.1007/s11244-016-0556-4
Published inTopics in Catalysis
© The Author(s) 2016. This article is published with open access at Springerlink.com and distributed under the terms of the Creative Commons Attribution 4.0 International License.
Surface defects are discussed and reviewed with regards to the use of ZrO2 in applications involving interactions with CO, H2, CH4, CO2, water and hydrocarbons. Studies of catalytic partial oxidation of methane reveal that part of the surface lattice oxygen in terraces can be removed by methane at high temperatures (e.g. 900 °C). The reaction proceeds via a surface confined redox mechanism. The studies presented here also highlight that defects play a decisive role in the water–gas-shift reaction, since the reaction is likely carried out via OH groups present at defect sites, which are regenerated by dissociating water. Hydroxyl chemistry on ZrO2 is briefly reviewed related to the studies presented. Finally, new density functional theory calculations were conducted to find out how H2S interacts with ZrO2 surface (defect sites), in order to explain enhancement of activity in naphthalene and ammonia oxidation by H2S. Molecularly adsorbed H2S as well as terminal SH species (produced by dissociation of H2S) cannot be responsible for enhanced reactivity of surface oxygen. In contrast, multi-coordinated SH induced a relatively weak increase of the reactivity of neighboring OH groups according to thermodynamic calculations. Probably, the right active site responsible for the observed H2S-induced enhancement of oxidation activity on ZrO2 is yet to be discovered. ...
Publication in research information system
MetadataShow full item record
Except where otherwise noted, this item's license is described as © The Author(s) 2016. This article is published with open access at Springerlink.com and distributed under the terms of the Creative Commons Attribution 4.0 International License.
Showing items with similar title or keywords.
Evidence that steric factors modulate reactivity of tautomeric iron–oxo species in stereospecific alkane C–H hydroxylation Mitra, Mainak; Lloret-Fillol, Julio; Haukka, Matti; Costas, Miquel; Nordlander, Ebbe (RSC Publications, 2014)MnI carbonyl terpyridyl complexes have been synthesized and characterized. The tricarbonyl derivative exhibits interesting behaviors for controlled CO-release by both thermal and photosynthetic pathways.
Salonen, Pasi, Peuronen, Anssi; Lehtonen, Ari (Elsevier BV, 2020)A series of bioinspired dioxidomolybdenum(vi), dioxidotungsten(vi) and oxidovanadium(v) complexes [MoO2(H2LSaltris)], [WO2(H2LSaltris)] and [VO(HLSaltris)]2 were prepared by the reaction of a hydroxyl-rich Schiff base ...
Superoxide-driven autocatalytic dark production of hydroxyl radicals in the presence of complexes of natural dissolved organic matter and iron Xiao, Yihua; Carena, Luca; Näsi, Marja-Terttu; Vähätalo, Anssi V. (Elsevier, 2020)We introduced superoxide as potassium superoxide (KO2) to artificial lake water containing dissolved organic matter (DOM) without or with introduced ferric iron complexes (DOM-Fe), and monitored the production rate of ...
Study of Ni, Pt, and Ru Catalysts on Wood-based Activated Carbon Supports and their Activity in Furfural Conversion to 2-Methylfuran Mäkelä, Eveliina; Lahti, Riikka; Jaatinen, Salla; Romar, Henrik; Hu, Tao; Puurunen, Riikka L.; Lassi, Ulla; Karinen, Reetta (Wiley-VCH, 2018)Bio‐based chemicals can be produced from furfural through hydrotreatment. In this study, 2‐methylfuran (MF), a potential biofuel component, was produced with Pt, Ru, and Ni catalysts supported on wood‐based activated ...
Dioxidomolybdenum(VI) and -tungsten(VI) Complexes with Tripodal Amino Bisphenolate Ligands as Epoxidation and Oxo-transfer Catalysts Hossain, Md. Kamal; Schachner, Jörg A.; Haukka, Matti; Lehtonen, Ari; Mösch-Zanetti, Nadia C.; Nordlander, Ebbe (Elsevier Ltd., 2017)The molybdenum(VI) and tungsten(VI) complexes [MO2(L)] (M = Mo (1), W (2), H2L = bis(2-hydroxy-3,5-di-tert-butybenzyl)morpholinylethylamine) were synthesized and the complexes were used to catalyze oxotransfer reactions, ...