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Wang C, Xu Y, Xiong L, Li X, Chen E, Miao TJ, Zhang T, Lan Y, Tang J. Selective oxidation of methane to C 2+ products over Au-CeO 2 by photon-phonon co-driven catalysis. Nat Commun 2024; 15:7535. [PMID: 39214973 PMCID: PMC11364766 DOI: 10.1038/s41467-024-51690-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Accepted: 08/14/2024] [Indexed: 09/04/2024] Open
Abstract
Direct methane conversion to high-value chemicals under mild conditions is attractive yet challenging due to the inertness of methane and the high reactivity of valuable products. This work presents an efficient and selective strategy to achieve direct methane conversion through the oxidative coupling of methane over a visible-responsive Au-loaded CeO2 by photon-phonon co-driven catalysis. A record-high ethane yield of 755 μmol h-1 (15,100 μmol g-1 h-1) and selectivity of 93% are achieved under optimised reaction conditions, corresponding to an apparent quantum efficiency of 12% at 365 nm. Moreover, the high activity of the photocatalyst can be maintained for at least 120 h without noticeable decay. The pre-treatment of the catalyst at relatively high temperatures introduces oxygen vacancies, which improves oxygen adsorption and activation. Furthermore, Au, serving as a hole acceptor, facilitates charge separation, inhibits overoxidation and promotes the C-C coupling reaction. All these enhance photon efficiency and product yield.
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Affiliation(s)
- Chao Wang
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Youxun Xu
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Lunqiao Xiong
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
- Industrial Catalysis Center, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Xiyi Li
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Enqi Chen
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Tina Jingyan Miao
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Tianyu Zhang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, P. R. China.
| | - Yang Lan
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Junwang Tang
- Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
- Industrial Catalysis Center, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.
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2
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Sydorenko J, Krunks M, Katerski A, Grzibovskis R, Vembris A, Mere A, Spalatu N, Acik IO. Development of spray pyrolysis-synthesised Bi 2O 3 thin films for photocatalytic applications. RSC Adv 2024; 14:19648-19657. [PMID: 38899031 PMCID: PMC11184579 DOI: 10.1039/d4ra02907k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 06/04/2024] [Indexed: 06/21/2024] Open
Abstract
Photocatalysis is a green and cost-effective approach to environmental remediation. While TiO2 is considered one of the benchmark photocatalysts, alternative materials such as Bi2O3 have recently attracted increasing scientific attention as prospective visible light photocatalysts. This study aimed to develop a strategy for Bi2O3 thin film deposition via ultrasonic spray pyrolysis and systematically study process variables for the deposition of β-Bi2O3 thin films for photocatalytic applications. To achieve the aim, the precursor solution concentration as well as deposition and annealing temperature were optimised. The structural, optical, morphological, chemical and wettability properties of the obtained Bi2O3 thin films were investigated with respect to the effect on the photocatalytic oxidation of 10 ppm methyl orange (MO). The highest photocatalytic activity (48% in 5 h) under UV-A was recorded for the β-Bi2O3 film deposited using 0.1 M precursor solution at 300 °C and heat-treated for 1 h in air at 350 °C. Deposition at 300 °C resulted in an amorphous film structure, whereas annealing at 350 °C led to the formation of the β-Bi2O3 phase with the dominant facet orientation (220). These results show the suitability of spray pyrolysis for the deposition of Bi2O3 thin films with promising results for MO dye degradation, expanding the range of suitable photocatalytic materials.
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Affiliation(s)
- Jekaterina Sydorenko
- Laboratory for Thin Film Energy Materials, Department of Materials and Environmental Technology, Tallinn University of Technology Ehitajate tee 5 19086 Tallinn Estonia +372 6203369
| | - Malle Krunks
- Laboratory for Thin Film Energy Materials, Department of Materials and Environmental Technology, Tallinn University of Technology Ehitajate tee 5 19086 Tallinn Estonia +372 6203369
| | - Atanas Katerski
- Laboratory for Thin Film Energy Materials, Department of Materials and Environmental Technology, Tallinn University of Technology Ehitajate tee 5 19086 Tallinn Estonia +372 6203369
| | - Raitis Grzibovskis
- Institute of Solid State Physics, University of Latvia Kengaraga Str. 8 Riga LV 1063 Latvia
| | - Aivars Vembris
- Institute of Solid State Physics, University of Latvia Kengaraga Str. 8 Riga LV 1063 Latvia
| | - Arvo Mere
- Laboratory for Thin Film Energy Materials, Department of Materials and Environmental Technology, Tallinn University of Technology Ehitajate tee 5 19086 Tallinn Estonia +372 6203369
| | - Nicolae Spalatu
- Laboratory for Thin Film Energy Materials, Department of Materials and Environmental Technology, Tallinn University of Technology Ehitajate tee 5 19086 Tallinn Estonia +372 6203369
| | - Ilona Oja Acik
- Laboratory for Thin Film Energy Materials, Department of Materials and Environmental Technology, Tallinn University of Technology Ehitajate tee 5 19086 Tallinn Estonia +372 6203369
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3
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Herzog AE, Michael TJ, Dunkelberger AD, Johannes MD, Rolison DR, DeSario PA, Novak TG. Nanostructured CeO 2 photocatalysts: optimizing surface chemistry, morphology, and visible-light absorption. NANOSCALE 2024; 16:9659-9679. [PMID: 38683667 DOI: 10.1039/d4nr00676c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Emerging photocatalytic applications of cerium dioxide (CeO2) include green hydrogen production, CO2 conversion to fuels, and environmental remediation of various toxic molecules. These applications leverage the oxygen storage capacity and tunable surface chemistry of CeO2 to photocatalyze the chosen reaction, but many open questions remain regarding the fundamental physics of photocatalysis over CeO2. The commonly ascribed 'bandgap' of CeO2 (∼3.1 eV) differs fundamentally from other photocatalytic oxides such as TiO2; UV light excites an electron from the CeO2 valence band into a 4f state, generating a polaron as the lattice distorts around the localized charge. Researchers often disregard the distinction between the 4f state and a traditional, delocalized conduction band, resulting in ambiguity regarding mechanisms of charge transfer and visible-light absorption. This review summarizes modern literature regarding CeO2 photocatalysis and discusses commonly reported photocatalytic reactions and visible light-sensitization strategies. We detail the often misunderstood fundamental physics of CeO2 photocatalysis and supplement previous work with original computational insights. The exceptional progress and remaining challenges of CeO2-based photocatalysts are highlighted, along with suggestions for further research directions based on the observed gaps in current understanding.
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Affiliation(s)
- Austin E Herzog
- NRC Postdoctoral Associate, U.S. Naval Research Laboratory, Washington, D.C., 20375, USA
| | - Tara J Michael
- NRC Postdoctoral Associate, U.S. Naval Research Laboratory, Washington, D.C., 20375, USA
| | - Adam D Dunkelberger
- Chemistry Division (Code 6100), U.S. Naval Research Laboratory, Washington, D.C., 20375, USA.
| | - Michelle D Johannes
- Materials Science and Technology Division (Code 6300), U.S. Naval Research Laboratory, Washington, D.C., 20375, USA
| | - Debra R Rolison
- Chemistry Division (Code 6100), U.S. Naval Research Laboratory, Washington, D.C., 20375, USA.
| | - Paul A DeSario
- Former NRL Staff Scientist in Code 6100, Advanced Naval Platforms Division, Office of Naval Research, Arlington, VA, 22203, USA
| | - Travis G Novak
- Chemistry Division (Code 6100), U.S. Naval Research Laboratory, Washington, D.C., 20375, USA.
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4
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Phattranit Dumrongrojthanath, Phuruangrat A, Sakhon T, Thongtem T, Thongtem S. Effect of Gd Dopant on Visible-Light-Driven Photocatalytic Properties of CeO2 Nanowires Synthesized Microwave-Assisted Hydrothermal Method. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622600757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Shang FK, Qi MY, Tan CL, Tang ZR, Xu YJ. Nanoscale Assembly of CdS/BiVO 4 Hybrids for Coupling Selective Fine Chemical Synthesis and Hydrogen Production under Visible Light. ACS PHYSICAL CHEMISTRY AU 2022; 2:216-224. [PMID: 36855572 PMCID: PMC9718317 DOI: 10.1021/acsphyschemau.1c00053] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Simultaneously utilizing photogenerated electrons and holes in one photocatalytic system to synthesize value-added chemicals and clean hydrogen (H2) energy meets the development requirements of green chemistry. Herein, we report a binary material of CdS/BiVO4 combining one-dimensional (1D) CdS nanorods (NRs) with two-dimensional (2D) BiVO4 nanosheets (NSs) constructed through a facile electrostatic self-assembly procedure for the selectively photocatalytic oxidation of aromatic alcohols integrated with H2 production, which exhibits significantly enhanced photocatalytic performance. Within 2 h, the conversion of aromatic alcohols over CdS/BiVO4-25 was approximately 9-fold and 40-fold higher than that over pure CdS and BiVO4, respectively. The remarkably improved photoactivity of CdS/BiVO4 hybrids is mainly ascribed to the Z-scheme charge separation mechanism in the 1D/2D heterostructure derived from the interface contact between CdS and BiVO4, which not only facilitates the separation and transfer of charge carriers, but also maintains the strong reducibility of photogenerated electrons and strong oxidizability of photogenerated holes. It is anticipated that this work will further stimulate interest in the rational design of 1D/2D Z-scheme heterostructure photocatalysts for the selective fine chemical synthesis integrated with H2 evolution.
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Nguyen MB, Pham XN, Doan HV. Heterostructure of vanadium pentoxide and mesoporous SBA-15 derived from natural halloysite for highly efficient photocatalytic oxidative desulphurisation. RSC Adv 2021; 11:31738-31745. [PMID: 35496832 PMCID: PMC9041538 DOI: 10.1039/d1ra06901b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 09/20/2021] [Indexed: 02/02/2023] Open
Abstract
Integration between conventional semiconductors and porous materials can enhance electron–hole separation, improving photocatalytic activity. Here, we introduce a heterostructure that was successfully constructed between vanadium pentoxide (V2O5) and mesoporous SBA-15 using inexpensive halloysite clay as the silica–aluminium source. The composite material with 40% doped V2O5 shows excellent catalytic performance in the oxidative desulphurisation of dibenzothiophene (conversion of 99% with only a minor change after four-cycle tests). These results suggest the development of new catalysts made from widely available natural minerals that show high stability and can operate in natural light to produce fuel oils with ultra-low sulphur content. New and robust catalysts made from natural minerals that can operate in sunlight to produce fuel oils with ultra-low-sulphur content.![]()
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Affiliation(s)
- Manh B Nguyen
- Institute of Chemistry (IOC), Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam.,Hanoi University of Science and Technology (HUST) 01 Dai Co Viet Road Hanoi Vietnam
| | - Xuan Nui Pham
- Department of Chemical Engineering, Hanoi University of Mining and Geology 18 Vien Street, Bac Tu Liem District Hanoi Vietnam
| | - Huan V Doan
- Department of Chemical Engineering, Hanoi University of Mining and Geology 18 Vien Street, Bac Tu Liem District Hanoi Vietnam .,School of Chemistry, University of Bristol Bristol BS8 1TS UK
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7
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Wolski L, Sobańska K, Walkowiak A, Akhmetova K, Gryboś J, Frankowski M, Ziolek M, Pietrzyk P. Enhanced adsorption and degradation of methylene blue over mixed niobium-cerium oxide - Unraveling the synergy between Nb and Ce in advanced oxidation processes. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125665. [PMID: 33773255 DOI: 10.1016/j.jhazmat.2021.125665] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/25/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Formation of reactive oxygen species (ROS) via H2O2 activation is of vital importance in catalytic environmental chemistry, especially in degradation of organic pollutants. A new mixed niobium-cerium oxide (NbCeOx) was tailored for this purpose. A thorough structural and chemical characterization of NbCeOx along with CeO2 and Nb2O5 reference materials was carried out using TEM/STEM/EDS, SEM, XRD, XPS, EPR, UV-vis and N2 physisorption. The ability of the catalysts to activate H2O2 towards ROS formation was assessed on the basis of EPR and Raman measurements. Catalytic activity of the oxides was evaluated in degradation of methylene blue (MB) as a model pollutant. Very high activity of NbCeOx was attributed to the mixed redox-acidic nature of its surface, which originated from the synergy between Nb and Ce species. These two properties (redox activity and acidity) ensured convenient conditions for efficient activation of H2O2 and degradation of MB. The activity of NbCeOx in MB degradation was found 3 times higher than that of the commercial Nb2O5 CBMM catalyst and 240 times higher than that of CeO2. The mechanism of the degradation reaction was found to be an adsorption-triggered process initiated by hydroxyl radicals, generated on the surface via the transformation of O2-•/O22-.
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Affiliation(s)
- Lukasz Wolski
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, ul. Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland.
| | - Kamila Sobańska
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Adrian Walkowiak
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, ul. Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
| | - Kamila Akhmetova
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Joanna Gryboś
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Marcin Frankowski
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, ul. Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
| | - Maria Ziolek
- Faculty of Chemistry, Adam Mickiewicz University, Poznan, ul. Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
| | - Piotr Pietrzyk
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland.
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Huang X, Zhang K, Peng B, Wang G, Muhler M, Wang F. Ceria-Based Materials for Thermocatalytic and Photocatalytic Organic Synthesis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02443] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xiubing Huang
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 10083, PR China
| | - Kaiyue Zhang
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 10083, PR China
| | - Baoxiang Peng
- Laboratory of Industrial Chemistry, Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Nordrhein-Westfalen, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Nordrhein-Westfalen, Germany
| | - Ge Wang
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction, School of Materials Science and Engineering, University of Science and Technology Beijing, No. 30 Xueyuan Road, Beijing 10083, PR China
| | - Martin Muhler
- Laboratory of Industrial Chemistry, Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Nordrhein-Westfalen, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Nordrhein-Westfalen, Germany
| | - Feng Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, PR China
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Wolski L, Lebedev OI, Harmer CP, Kovnir K, Abdelli H, Grzyb T, Daturi M, El-Roz M. Unraveling the Origin of Photocatalytic Deactivation in CeO 2/Nb 2O 5 Heterostructure Systems during Methanol Oxidation: Insight into the Role of Cerium Species. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:12650-12662. [PMID: 34276865 PMCID: PMC8279704 DOI: 10.1021/acs.jpcc.1c02812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/19/2021] [Indexed: 06/13/2023]
Abstract
The study provides deep insight into the origin of photocatalytic deactivation of Nb2O5 after modification with ceria. Of particular interest was to fully understand the role of ceria species in diminishing the photocatalytic performance of CeO2/Nb2O5 heterostructures. For this purpose, ceria was loaded on niobia surfaces by wet impregnation. The as-prepared materials were characterized by powder X-ray diffraction, nitrogen physisorption, UV-visible spectroscopy, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, and photoluminescence measurements. Photocatalytic activity of parent metal oxides (i.e., Nb2O5 and CeO2) and as-prepared CeO2/Nb2O5 heterostructures with different ceria loadings were tested in methanol photooxidation, a model gas-phase reaction. Deep insight into the photocatalytic process provided by operando-IR techniques combined with results of photoluminescence studies revealed that deactivation of CeO2/Nb2O5 heterostructures resulted from increased recombination of photo-excited electrons and holes. The main factor contributing to more efficient recombination of the charge carriers in the heterostructures was the ultrafine size of the ceria species. The presence of such highly dispersed ceria species on the niobia surface provided a strong interface between these two semiconductors, enabling efficient charge transfer from Nb2O5 to CeO2. However, the ceria species supported on niobia exhibited a high defect site concentration, which acted as highly active recombination centers for the photo-induced charge carriers.
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Affiliation(s)
- Lukasz Wolski
- Faculty
of Chemistry, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego
8, Poznań 61-614, Poland
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, Caen 14050, France
| | - Oleg I. Lebedev
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire CRISMAT, Caen 14050, France
| | - Colin P. Harmer
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- U.S.
Department of Energy, Ames Laboratory, Ames, Iowa 50011, United States
| | - Kirill Kovnir
- Department
of Chemistry, Iowa State University, Ames, Iowa 50011, United States
- U.S.
Department of Energy, Ames Laboratory, Ames, Iowa 50011, United States
| | - Hanen Abdelli
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, Caen 14050, France
| | - Tomasz Grzyb
- Department
of Rare Earths, Faculty of Chemistry, Adam
Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Marco Daturi
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, Caen 14050, France
| | - Mohamad El-Roz
- Normandie
Univ, ENSICAEN, UNICAEN, CNRS, Laboratoire Catalyse et Spectrochimie, Caen 14050, France
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10
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Boosting multiple photo-assisted and temperature controlled reactions with a single redox-switchable catalyst: Solvents as internal substrates and reducing agent. J Catal 2020. [DOI: 10.1016/j.jcat.2020.04.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Reddy MSB, Kailasa S, Geeta Rani B, Munindra P, Bikshalu K, Rao KV. CeO2 nano-hexagons decorated rGO/CNT heterostructure for high-performance LPG sensing. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2220-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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