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Inayat A, Rocha-Meneses L, Ayoub M, Ullah S, Abdullah AZ, Naqvi SR, Bhat AH. Influence of Co 3O 4-based catalysts on N 2O catalytic decomposition and NO conversion. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27371-w. [PMID: 37170050 DOI: 10.1007/s11356-023-27371-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 04/27/2023] [Indexed: 05/13/2023]
Abstract
This study investigated the effect of different Co3O4-based catalysts on the catalytic decomposition of nitrous oxide (N2O) and on nitric oxide (NO) conversion. The experiments were carried out using various reaction temperatures, alkaline solutions, pH, mixing conditions, aging times, space velocities, impregnation loads, and compounds. The results showed that Co3O4 catalysts prepared by precipitation methods have the highest catalytic activity and N2O conversion, even at low reaction temperatures, while the commercial nano and powder forms of Co3O4 (CS) have the lowest performance. The catalysts become inactive at temperatures below 400 °C, and their activity is strongly influenced by the mixing temperature. Samples without stirring during the aging process have higher catalytic activity than those with stirring, even at low reaction temperatures (200-300 °C). The catalytic activity of Co3O4 PM1 decreases with low W/F values and low reaction temperatures. Additionally, the catalyst's performance tends to increase with the reduction process. The study suggests that cobalt-oxide-based catalysts are effective in N2O catalytic decomposition and NO conversion. The findings may be useful in the design and optimization of catalytic systems for N2O and NO control. The results obtained provide important insights into the development of highly efficient, low-cost, and sustainable catalysts for environmental protection.
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Affiliation(s)
- Abrar Inayat
- Department of Sustainable and Renewable Energy Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates
- Biomass & Bioenergy Research Group, Center for Sustainable Energy and Power Systems Research, Research Institute of Sciences and Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates
| | - Lisandra Rocha-Meneses
- Technology Innovation Institute, Renewable and Sustainable Energy Research Center, Masdar City, P.O. Box: 9639, Abu Dhabi, United Arab Emirates.
| | - Muhammad Ayoub
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, 32610, Perak, Malaysia
| | - Sami Ullah
- Department of Chemistry, College of Science, King Khalid University, Abha, 61413, Saudi Arabia
| | - Ahmad Z Abdullah
- School of Chemical Engineering, Universiti Sains Malaysia, 14300, Pinang, Malaysia
| | - Salman R Naqvi
- School of Chemical and Materials Engineering, National University of Science and Technology, Islamabad, Pakistan
| | - Aamir H Bhat
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610, Perak, Malaysia
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Zhao F, Wang D, Li X, Yin Y, Wang C, Qiu L, Yu J, Chang H. Enhancement of Cs on Co 3O 4 for N 2O Catalytic Decomposition: N 2O Activation and O 2 Desorption. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Feilin Zhao
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Dongdong Wang
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Xing Li
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Yimeng Yin
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Chizhong Wang
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Lei Qiu
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Jie Yu
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Huazhen Chang
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
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Li L, Tao R, Liu Y, Zhou K, Fan X, Han Y, Tang L. Co3O4 nanoparticles/Bi2O3 nanosheets: One step synthesis, high-efficiency thermal catalytic performance, and catalytic mechanism research. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Jing Y, Taketoshi K, Zhang N, He C, Toyao T, Maeno Z, Ohori T, Ishikawa N, Shimizu KI. Catalytic Decomposition of N 2O in the Presence of O 2 through Redox of Rh Oxide in a RhO x/ZrO 2 Catalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01321] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yuan Jing
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Hokkaido, Japan
| | - Koichiro Taketoshi
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Hokkaido, Japan
| | - Ningqiang Zhang
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Hokkaido, Japan
| | - Chenxi He
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Hokkaido, Japan
| | - Takashi Toyao
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Hokkaido, Japan
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Zen Maeno
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Hokkaido, Japan
| | - Teppei Ohori
- Isuzu Advanced Engineering Center, Ltd., 8 Tsuchidana, Fujisawa 252-0881, Japan
| | - Naoya Ishikawa
- Isuzu Advanced Engineering Center, Ltd., 8 Tsuchidana, Fujisawa 252-0881, Japan
| | - Ken-ichi Shimizu
- Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo 001-0021, Hokkaido, Japan
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
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Wang P, Jin C, Zheng D, Yang T, Wang Y, Zheng R, Bai H. Engineering Co Vacancies for Tuning Electrical Properties of p-Type Semiconducting Co 3O 4 Films. ACS APPLIED MATERIALS & INTERFACES 2021; 13:26621-26629. [PMID: 34038070 DOI: 10.1021/acsami.1c05748] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Spinel oxide Co3O4 has attracted more and more attention for energy- and environment-related applications. In order to tune the electrical properties of Co3O4, p-type semiconducting Co3O4 films were fabricated on the Pb(Mg1/3Nb2/3)0.7Ti0.3O3 (PMN-PT), MgAl2O4 (MAO), and SrTiO3 substrates by reactive magnetron sputtering. The Co3O4 film on the MAO substrate exhibits perfect epitaxial growth. However, the Co3O4 film on the PMN-PT substrate presents dislocation defects between the [011] and [112] orientations. The special ferroelectric domain shape surface and phase transition of the PMN-PT substrate induce the higher concentration of Co vacancies in the Co3O4 film, which further reduce the resistivity by several orders of magnitude. The calculated results indicate that introducing Co vacancies can enhance the electrical properties of Co3O4 by building impurity levels near the Fermi level, which is beneficial to form free-moving holes in the valence band. The free-moving holes can also be accumulated/dissipated by the ferroelectric field effect of PMN-PT substrates, leading to upward/downward bending of conduction, valence bands, and low/high-resistance states. This work helps us to tune and improve the electrical properties of Co3O4.
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Affiliation(s)
- Ping Wang
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Processing Technology, School of Science, Tianjin University, Tianjin 300350, P. R. China
| | - Chao Jin
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Processing Technology, School of Science, Tianjin University, Tianjin 300350, P. R. China
| | - Dongxing Zheng
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Processing Technology, School of Science, Tianjin University, Tianjin 300350, P. R. China
| | - Tiebin Yang
- School of Physics, Australian Centre for Microscopy and Microanalysis, The University of Sydney, Camperdown, New South Wales 2006, Australia
| | - Yuchen Wang
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Processing Technology, School of Science, Tianjin University, Tianjin 300350, P. R. China
| | - Rongkun Zheng
- School of Physics, Australian Centre for Microscopy and Microanalysis, The University of Sydney, Camperdown, New South Wales 2006, Australia
| | - Haili Bai
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Processing Technology, School of Science, Tianjin University, Tianjin 300350, P. R. China
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Investigation of Different Apatites-Supported Co3O4 as Catalysts for N2O Decomposition. CATALYSIS SURVEYS FROM ASIA 2021. [DOI: 10.1007/s10563-021-09323-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Atomic-Level Dispersion of Bismuth over Co3O4 Nanocrystals—Outstanding Promotional Effect in Catalytic DeN2O. Catalysts 2020. [DOI: 10.3390/catal10030351] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A series of cobalt spinel catalysts doped with bismuth in a broad range of 0–15.4 wt % was prepared by the co-precipitation method. The catalysts were thoroughly characterized by several physicochemical methods (X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), Raman spectroscopy (µRS), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption analyzed with Brunaer-Emmett-Teller theory (N2-BET), work function measurements (WF)), as well as aberration-corrected scanning transmission electron microscopy (STEM) coupled with energy-dispersive X-ray spectroscopy (EDX) and electron energy-loss spectroscopy (EELS). The optimal bismuth promoter content was found to be 6.6 wt %, which remarkably enhanced the performance of the cobalt spinel catalyst, shifting the N2O decomposition (deN2O) temperature window (T50%) down from approximately 400 °C (for Co3O4) to 240 °C (for the 6.6 wt % Bi-Co3O4 catalyst). The high-resolution STEM images revealed that the high activity of the 6.6 wt % Bi-Co3O4 catalyst can be associated with an even, atomic-level dispersion (3.5 at. nm−2) of bismuth over the surface of cobalt spinel nanocrystals. The improvement in catalytic activity was accompanied by an observed increase in the work function. We concluded that Bi promoted mostly the oxygen recombination step of a deN2O reaction, thus demonstrating for the first time the key role of the atomic-level dispersion of a surface promoter in deN2O reactions.
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Bulk, Surface and Interface Promotion of Co3O4 for the Low-Temperature N2O Decomposition Catalysis. Catalysts 2019. [DOI: 10.3390/catal10010041] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Nanocrystalline cobalt spinel has been recognized as a very active catalytic material for N2O decomposition. Its catalytic performance can be substantially modified by proper doping with alien cations with precise control of their loading and location (spinel surface, bulk, and spinel-dopant interface). Various doping scenarios for a rational design of the optimal catalyst for low-temperature N2O decomposition are analyzed in detail and the key reactivity descriptors are identified (content and topological localization of dopants, their redox vs. non-redox nature and catalyst work function). The obtained results are discussed in the broader context of the available literature data to establish general guidelines for the rational design of the N2O decomposition catalyst based on a cobalt spinel platform.
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