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Richards N, Parker LA, Carter JH, Pattisson S, Morgan DJ, Dummer NF, Golunski SE, Hutchings GJ. Effect of the Preparation Method of LaSrCoFeOx Perovskites on the Activity of N2O Decomposition. Catal Letters 2022. [DOI: 10.1007/s10562-021-03619-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AbstractN2O remains a major greenhouse gas and contributor to global warming, therefore developing a catalyst that can decompose N2O at low temperatures is of global importance. We have investigated the use of LaSrCoFeOx perovskites for N2O decomposition and the effect of surface area, A and B site elements, Co–O bond strength, redox capabilities and oxygen mobility have been studied. It was found that by using a citric acid preparation method, perovskites with strong redox capabilities and weak Co–O bonds can be formed at relatively low calcination temperatures (550 °C) resulting in highly active catalysts. The enhanced activity is related to the presence of highly mobile oxygen species. Oxygen recombination on the catalyst surface is understood to be a prominent rate limiting step for N2O decomposition. Here the reduced strength of Co–O bonds and mobile lattice oxygen species suggest that the surface oxygen species have enhanced mobility, aiding recombination, and subsequent regeneration of the active sites. La0.75Sr0.25Co0.81Fe0.19Ox prepared by citric acid method converted 50% of the N2O in the feed (T50) at 448 °C.
Graphic Abstract
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Vats V, Singhal A. Effect of Ru Substitution in La
0.85
Sr
0.15
CoO
3
towards Oxygen Evolution Reaction: Activity of Ionic Ru. ELECTROANAL 2021. [DOI: 10.1002/elan.202060079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Vishal Vats
- School of Engineering and Applied Science Ahmedabad University Ahmedabad 380009 Gujarat India
| | - Aditi Singhal
- School of Engineering and Applied Science Ahmedabad University Ahmedabad 380009 Gujarat India
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Richards N, Carter JH, Parker LA, Pattisson S, Hewes DG, Morgan DJ, Davies TE, Dummer NF, Golunski S, Hutchings GJ. Lowering the Operating Temperature of Perovskite Catalysts for N2O Decomposition through Control of Preparation Methods. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00698] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nia Richards
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
| | - James H. Carter
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
| | - Luke A. Parker
- Inorganic Chemistry and Catalysis Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584CG Utrecht, The Netherlands
| | - Samuel Pattisson
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
| | - Daniel G. Hewes
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
| | - David J. Morgan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
| | - Thomas E. Davies
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
| | - Nicholas F. Dummer
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
| | - Stanislaw Golunski
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
| | - Graham J. Hutchings
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K
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Sol-Gel Synthesis of Carbon-Coated LaCoO3for Effective Electrocatalytic Oxidation of Salicylic Acid. ChemElectroChem 2017. [DOI: 10.1002/celc.201600714] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Nedilko SA, Tymoshchuk OB. Physicochemical Principles of the Production of High-Temperature Superconducting Phases in the Ln–Ba–Cu–O System. THEOR EXP CHEM+ 2015. [DOI: 10.1007/s11237-015-9385-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Liang H, Hong Y, Zhu C, Li S, Chen Y, Liu Z, Ye D. Influence of partial Mn-substitution on surface oxygen species of LaCoO3 catalysts. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.04.036] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Influence of the nature of alkaline earth element on the catalytic properties of perovskites with the composition La1–3x Li x M2xCoO3±δ (M = Ca, Sr, Ba; 0 ≤ x ≤ 0.05) in the oxidation of CO. THEOR EXP CHEM+ 2011. [DOI: 10.1007/s11237-011-9201-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
The utilization of zinc anode for zinc-based battery is limited due to low cycling life, shape change and ZnO passivation on the electrode surface. The electrochemical behavior of zinc anode in the presence of the additives added to the electrodes or the electrolytes have been reported. In this work, LaCoO3 was used as an additive to improve the electrochemical properties of the zinc oxide anode. LaCoO3 synthesized by sol gel method (Schiff base complex) was added to zinc oxide powder (99.9%) with the weight ratio of 1:0.001, 1:0.002 and 1:0.003. The relative ZnO/LaCoO3 ratios were confirmed by particle induced x-ray emission (PIXE) technique.The electrochemical behavior of the ZnO/LaCoO3 electrodes in 6M KOH solution were investigated by voltammetry and electrochemical impedance spectroscopy (EIS). The cyclic voltammogram showed that ZnO/LaCoO3 gave higher anodic current and ZnO passivation delayed. The EIS spectra showed that charge transfer resistances of the ZnO/LaCoO3 anodes due to zinc oxidation were higher than that of ZnO electrode
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