1
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García-Rodríguez M, Cazorla-Amorós D, Morallón E. Eco-Friendly Mechanochemical Synthesis of Bifunctional Metal Oxide Electrocatalysts for Zn-Air Batteries. CHEMSUSCHEM 2024:e202401055. [PMID: 38924618 DOI: 10.1002/cssc.202401055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/20/2024] [Accepted: 06/24/2024] [Indexed: 06/28/2024]
Abstract
The development of green and environmentally friendly synthesis methods of electrocatalysts is a crucial aspect in decarbonizing energy generation. In this study, eco-friendly mechanochemical synthesis of perovskite metal oxide-carbon black composites is proposed using different conditions and additives such as KOH. Furthermore, the optimization of ball milling conditions, including time and rotational speed, is studied. The mechanochemical synthesis in solid-state conditions without additives produces electrocatalysts that exhibit the highest bifunctional electrochemical activity towards both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Moreover, this synthesis demonstrates a lower Environmental Impact Factor (E-factor), indicating its greener nature, and due to its simplicity, it has a great potential for scalability. The obtained bifunctional electrocatalysts have been tested in a rechargeable zinc-air battery (ZAB) for 22 h with similar performance compared to the commercial catalyst (Pt/C) at significantly lower cost. These promising findings are attributed to the enhanced interaction between the perovskite metal oxide and carbon material and the improved dispersion of the perovskite metal oxide on the carbon materials.
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Affiliation(s)
- M García-Rodríguez
- Dept. Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain
| | - D Cazorla-Amorós
- Dept. Química Inorgánica e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain
| | - E Morallón
- Dept. Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain
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2
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García-Rodríguez M, Flores-Lasluisa JX, Cazorla-Amorós D, Morallón E. Enhancing Interaction between Lanthanum Manganese Cobalt Oxide and Carbon Black through Different Approaches for Primary Zn-Air Batteries. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2309. [PMID: 38793376 PMCID: PMC11123494 DOI: 10.3390/ma17102309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/08/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024]
Abstract
Due to the need for decarbonization in energy generation, it is necessary to develop electrocatalysts for the oxygen reduction reaction (ORR), a key process in energy generation systems such as fuel cells and metal-air batteries. Perovskite-carbon material composites have emerged as active and stable electrocatalysts for the ORR, and the interaction between both components is a crucial aspect for electrocatalytic activity. This work explores different mixing methods for composite preparation, including mortar mixing, ball milling, and hydrothermal and thermal treatments. Hydrothermal treatment combined with ball milling resulted in the most favorable electrocatalytic performance, promoting intimate and extensive contact between the perovskite and carbon material and improving electrocatalytic activity. Employing X-ray photoelectron spectroscopy (XPS), an increase in the number of M-O-C species was observed, indicating enhanced interaction between the perovskite and the carbon material due to the adopted mixing methods. This finding was further corroborated by temperature-programmed reduction (TPR) and temperature-programmed desorption (TPD) techniques. Interestingly, the ball milling method results in similar performance to the hydrothermal method in the zinc-air battery and, thus, is preferable because of the ease and straightforward scalability of the preparation process.
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Affiliation(s)
- Mario García-Rodríguez
- Departamento Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain; (M.G.-R.)
| | - Jhony X. Flores-Lasluisa
- Departamento Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain; (M.G.-R.)
| | - Diego Cazorla-Amorós
- Departamento Química Inorgánica e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain;
| | - Emilia Morallón
- Departamento Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain; (M.G.-R.)
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3
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Biswas S, Naushad N, S K, Kamble VB. Resistive Avalanches in La 1-xSr xCoO 3-δ ( x = 0, 0.3) Thin Films and Their Reversible Evolution by Tuning Lattice Oxygen Vacancies (δ). ACS MATERIALS AU 2024; 4:308-323. [PMID: 38737118 PMCID: PMC11083121 DOI: 10.1021/acsmaterialsau.3c00101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/18/2024] [Accepted: 01/23/2024] [Indexed: 05/14/2024]
Abstract
Strong correlations are often manifested by exotic electronic phases and phase transitions. LaCoO3-δ (LCO) is a system that exhibits such strong electronic correlations with lattice-spin-charge-orbital degrees of freedom. Here, we show that mesoscopic oxygen-deficient LCO films show resistive avalanches of about 2 orders of magnitude due to the metal-insulator transition (MIT) of the film at about 372 K for the 25 W RF power-deposited LCO film on the Si/SiO2 substrate. In bulk, this transition is otherwise gradual and occurs over a very large temperature range. In thin films of LCO, the oxygen deficiency (0 < δ < 0.5) is more easily reversibly tuned, resulting in avalanches. The avalanches disappear after vacuum annealing, and the films behave like normal insulators (δ ∼0.5) with Co2+ in charge ordering alternatively with Co3+. This oxidation state change induces spin state crossovers that result in a spin blockade in the insulating phase, while the conductivity arises from hole hopping among the allowed cobalt Co4+ ion spin states at high temperature. The chemical pressure (strain) of 30% Sr2+ doping at the La3+ site results in reduction in the avalanche magnitude as well as their retention in subsequent heating cycles. The charge nonstoichiometry arising due to Sr2+ doping is found to contribute toward hole doping (i.e., Co3+ oxidation to Co4+) and thereby the retention of the hole percolation pathway. This is also manifested in energies of crossover from the 3D variable range hopping (VRH) type transport observed in the temperature range of 300-425 K, while small polaron hopping (SPH) is observed in the temperature range of 600-725 K for LCO. On the other hand, Sr-doped LCO does not show any crossover and only the VRH type of transport. The strain due to Sr2+ doping refrains the lattice from complete conversion of δ going to 0.5, retaining the avalanches.
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Affiliation(s)
- Soumya Biswas
- School of Physics, Indian Institute
of Science Education and Research, Thiruvananthapuram 695551, India
| | - Noora Naushad
- School of Physics, Indian Institute
of Science Education and Research, Thiruvananthapuram 695551, India
| | - Kalyani S
- School of Physics, Indian Institute
of Science Education and Research, Thiruvananthapuram 695551, India
| | - Vinayak B. Kamble
- School of Physics, Indian Institute
of Science Education and Research, Thiruvananthapuram 695551, India
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4
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Qiu Q, Wang J, Yao P, Li Y. A facile coprecipitation approach for synthesizing LaNi 0.5Co 0.5O 3 as the cathode for a molten-salt lithium-oxygen battery. Faraday Discuss 2024; 248:327-340. [PMID: 37753574 DOI: 10.1039/d3fd00078h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
The cathode of a lithium-oxygen battery (LOB) should be well designed to deliver high catalytic activity and long stability, and to provide sufficient space for accommodating the discharge product. Herein, a facile coprecipitation approach is employed to synthesize LaNi0.5Co0.5O3 (LNCO) perovskite oxide with a low annealing temperature. The assembled LOB exhibits superior electrochemical performance with a low charge overpotential of 0.03-0.05 V in the current density range of 0.1-0.5 mA cm-2. The battery ran stably for 119 cycles at a high coulombic efficiency. The superior performance is ascribed to (i) the high catalytic activity of LNCO towards oxygen reduction/evolution reactions; (ii) the increased temperature enabling fast kinetics; and (iii) the LiNO3-KNO3 molten salt enhancing the stability of the LOB operating at high temperature.
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Affiliation(s)
- Qianyuan Qiu
- Department of Chemical and Metallurgical Engineering, Aalto University, Kemistintie 1, FI-00076 Aalto, Finland.
| | - Jiaqi Wang
- Department of Chemical and Metallurgical Engineering, Aalto University, Kemistintie 1, FI-00076 Aalto, Finland.
- Flexible Printed Electronic Technology Center and State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China
| | - Penghui Yao
- Department of Chemical and Metallurgical Engineering, Aalto University, Kemistintie 1, FI-00076 Aalto, Finland.
| | - Yongdan Li
- Department of Chemical and Metallurgical Engineering, Aalto University, Kemistintie 1, FI-00076 Aalto, Finland.
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5
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Alharbi SM, Alkhalifah MA, Howchen B, Rahmah ANA, Celorrio V, Fermin DJ. Activating Mn Sites by Ni Replacement in α-MnO 2. ACS MATERIALS AU 2024; 4:74-81. [PMID: 38221925 PMCID: PMC10786130 DOI: 10.1021/acsmaterialsau.3c00051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 09/01/2023] [Accepted: 10/05/2023] [Indexed: 01/16/2024]
Abstract
Transition metal oxides are characterized by an acute structure and composition dependent electrocatalytic activity toward the oxygen evolution (OER) and oxygen reduction (ORR) reactions. For instance, Mn containing oxides are among the most active ORR catalysts, while Ni based compounds tend to show high activity toward the OER in alkaline solutions. In this study, we show that incorporation of Ni into α-MnO2, by adding Ni precursor into the Mn-containing hydrothermal solution, can generate distinctive sites with different electronic configurations and contrasting electrocatalytic activity. The structure and composition of the Ni modified hollandite α-MnO2 phase were investigated by X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), transmission electron microscopy coupled to energy-dispersive X-ray spectroscopy (TEM-EDX), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and X-ray photoelectron spectroscopy (XPS). Our analysis suggests that Mn replacement by Ni into the α-MnO2 lattice (site A) occurs up to approximately 5% of the total Mn content, while further increasing Ni content promotes the nucleation of separate Ni phases (site B). XAS and XRD show that the introduction of sites A and B have a negligible effect on the overall Mn oxidation state and bonding characteristics, while very subtle changes in the XPS spectra appear to suggest changes in the electronic configuration upon Ni incorporation into the α-MnO2 lattice. On the other hand, changes in the electronic structure promoted by site A have a significant impact in the pseudocapacitive responses obtained by cyclic voltammetry in KOH solution at pH 13, revealing the appearance of Mn 3d orbitals at the energy (potential) range relevant to the ORR. The evolution of Mn 3d upon Ni replacement significantly increases the catalytic activity of α-MnO2 toward the ORR. Interestingly, the formation of segregated Ni phases (site B) leads to a decrease in the ORR activity while increasing the OER rate.
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Affiliation(s)
- Sami M. Alharbi
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
- Department
of Chemistry, College of Science, Qassim
University, Buraydah 52571, Saudi Arabia
| | - Mohammed A. Alkhalifah
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
- Department
of Chemistry, College of Science, King Faisal
University, P.O. Box 380, Al-Ahsa, 31982, Saudi Arabia
| | - Benjamin Howchen
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
| | - Athi N. A. Rahmah
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
| | - Veronica Celorrio
- Diamond
Light Source Ltd., Diamond
House, Harwell Campus, Didcot OX11 0DE, U.K.
| | - David J. Fermin
- School
of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K.
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6
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Synthesis, characterization, and use of nanocast LaMnO3 perovskites in the catalytic production of imine by the gas-phase oxidative coupling of benzyl alcohol to aniline. CATAL COMMUN 2023. [DOI: 10.1016/j.catcom.2023.106606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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7
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Flores-Lasluisa JX, Huerta F, Cazorla-Amorós D, Morallón E. Transition metal oxides with perovskite and spinel structures for electrochemical energy production applications. ENVIRONMENTAL RESEARCH 2022; 214:113731. [PMID: 35753372 DOI: 10.1016/j.envres.2022.113731] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 06/14/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
Transition metal oxide-based materials are an interesting alternative to substitute noble-metal based catalyst in energy conversion devices designed for oxygen reduction (ORR), oxygen evolution (OER) and hydrogen evolution reactions (HER). Perovskite (ABO3) and spinel (AB2O4) oxides stand out against other structures due to the possibility of tailoring their chemical composition and, consequently, their properties. Particularly, the electrocatalytic performance of these materials depends on features such as chemical composition, crystal structure, nanostructure, cation substitution level, eg orbital filling or oxygen vacancies. However, they suffer from low electrical conductivity and surface area, which affects the catalytic response. To mitigate these drawbacks, they have been combined with carbon materials (e.g. carbon black, carbon nanotubes, activated carbon, and graphene) that positively influence the overall catalytic activity. This review provides an overview on tunable perovskites (mainly lanthanum-based) and spinels featuring 3d metal cations such as Mn, Fe, Co, Ni and Cu on octahedral sites, which are known to be active for the electrochemical energy conversion.
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Affiliation(s)
- J X Flores-Lasluisa
- Dept. Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain
| | - F Huerta
- Dept. Ingenieria Textil y Papelera, Universitat Politecnica de Valencia, Plaza Ferrandiz y Carbonell, 1, E-03801, Alcoy, Spain
| | - D Cazorla-Amorós
- Dept. Química Inorgánica e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain
| | - E Morallón
- Dept. Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain.
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8
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Ghanem MA, Amer MS, Arunachalam P, Al-Mayouf AM, Weller MT. Role of rhodium doping into lanthanum cobalt oxide (LaCoO3) perovskite and the induced bifunctional activity of oxygen evolution and reduction reactions in alkaline medium. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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9
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Bredar ARC, Blanchet MD, Burton AR, Matthews BE, Spurgeon SR, Comes RB, Farnum BH. Oxygen Reduction Electrocatalysis with Epitaxially Grown Spinel MnFe 2O 4 and Fe 3O 4. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05172] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Alexandria R. C. Bredar
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Miles D. Blanchet
- Department of Physics, Auburn University, Auburn, Alabama 36849, United States
| | - Andricus R. Burton
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Bethany E. Matthews
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Steven R. Spurgeon
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Ryan B. Comes
- Department of Physics, Auburn University, Auburn, Alabama 36849, United States
| | - Byron H. Farnum
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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10
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Flores-Lasluisa JX, Salinas-Torres D, López-Ramón MV, Moreno-Castilla C, Álvarez MA, Morallón E, Cazorla-Amorós D. Electrocatalytic activity of calcined manganese ferrite solid nanospheres in the oxygen reduction reaction. ENVIRONMENTAL RESEARCH 2022; 204:112126. [PMID: 34563521 DOI: 10.1016/j.envres.2021.112126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/17/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
In this study, we synthesized MnFe2O4 solid nanospheres (MSN) calcined at different temperatures (200-500 °C) and MSN-based materials mixed with carbon black, for their use as electrocatalysts in the oxygen reduction reaction (ORR) in alkaline medium (0.1 M KOH). It was demonstrated that the calcination temperature of MSN material determined its chemical surface composition and microstructure and it had an important effect on the electrocatalytic properties for ORR, which in turn was reflected in the performance of MSN/CB-based electrocatalysts. The study revealed that the presence of Mn species plays a key role in the ORR activity. Among tested, MSN200/CB and MSN350/CB exhibited the best electrochemical performances together with outstanding stability.
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Affiliation(s)
- J X Flores-Lasluisa
- Departamento de Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain
| | - D Salinas-Torres
- Departamento de Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain.
| | - M V López-Ramón
- Departamento de Química Inorgánica y Orgánica, Facultad de Ciencias Experimentales, Universidad de Jaén, E-23071, Jaén, Spain.
| | - C Moreno-Castilla
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, E-18071, Granada, Spain.
| | - M A Álvarez
- Departamento de Química Inorgánica y Orgánica, Facultad de Ciencias Experimentales, Universidad de Jaén, E-23071, Jaén, Spain
| | - E Morallón
- Departamento de Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain
| | - D Cazorla-Amorós
- Departamento de Química Inorgánica e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080, Alicante, Spain
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11
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Huang R, Lim C, Jang MG, Hwang JY, Han JW. Exsolved metal-boosted active perovskite oxide catalyst for stable water gas shift reaction. J Catal 2021. [DOI: 10.1016/j.jcat.2021.05.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Ipadeola AK, Haruna AB, Gaolatlhe L, Lebechi AK, Meng J, Pang Q, Eid K, Abdullah AM, Ozoemena KI. Efforts at Enhancing Bifunctional Electrocatalysis and Related Events for Rechargeable Zinc‐Air Batteries. ChemElectroChem 2021. [DOI: 10.1002/celc.202100574] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Adewale K. Ipadeola
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
| | - Aderemi B. Haruna
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
| | - Lesego Gaolatlhe
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
| | - Augustus K. Lebechi
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
| | - Jiashen Meng
- School of Materials Science and Engineering Peking University Beijing 100871 China
| | - Quanquan Pang
- School of Materials Science and Engineering Peking University Beijing 100871 China
| | - Kamel Eid
- Gas Processing Centre, College of Engineering Qatar University Doha 2713 Qatar
| | - Aboubakr M. Abdullah
- Centre for Advanced Materials, College of Engineering Qatar University Doha 2713 Qatar
| | - Kenneth I. Ozoemena
- Molecular Sciences Institute, School of Chemistry University of the Witwatersrand Private Bag 3, PO Wits Johannesburg 2050 South Africa
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13
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Harn YW, Liang S, Liu S, Yan Y, Wang Z, Jiang J, Zhang J, Li Q, He Y, Li Z, Zhu L, Cheng HP, Lin Z. Tailoring electrocatalytic activity of in situ crafted perovskite oxide nanocrystals via size and dopant control. Proc Natl Acad Sci U S A 2021; 118:e2014086118. [PMID: 34161256 PMCID: PMC8237576 DOI: 10.1073/pnas.2014086118] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Perovskite oxides (ABO3) have been widely recognized as a class of promising noble-metal-free electrocatalysts due to their unique compositional flexibility and structural stability. Surprisingly, investigation into their size-dependent electrocatalytic properties, in particular barium titanate (BaTiO3), has been comparatively few and limited in scope. Herein, we report the scrutiny of size- and dopant-dependent oxygen reduction reaction (ORR) activities of an array of judiciously designed pristine BaTiO3 and doped BaTiO3 (i.e., La- and Co-doped) nanoparticles (NPs). Specifically, a robust nanoreactor strategy, based on amphiphilic star-like diblock copolymers, is employed to synthesize a set of hydrophobic polymer-ligated uniform BaTiO3 NPs of different sizes (≤20 nm) and controlled compositions. Quite intriguingly, the ORR activities are found to progressively decrease with the increasing size of BaTiO3 NPs. Notably, La- and Co-doped BaTiO3 NPs display markedly improved ORR performance over the pristine counterpart. This can be attributed to the reduced limiting barrier imposed by the formation of -OOH species during ORR due to enhanced adsorption energy of intermediates and the possibly increased conductivity as a result of change in the electronic states as revealed by our density functional theory-based first-principles calculations. Going beyond BaTiO3 NPs, a variety of other ABO3 NPs with tunable sizes and compositions may be readily accessible by exploiting our amphiphilic star-like diblock copolymer nanoreactor strategy. They could in turn provide a unique platform for both fundamental and practical studies on a suite of physical properties (dielectric, piezoelectric, electrostrictive, catalytic, etc.) contingent upon their dimensions and compositions.
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Affiliation(s)
- Yeu-Wei Harn
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Shuang Liang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Shuanglong Liu
- Department of Physics, University of Florida, Gainesville, FL 32611
- Quantum Theory Project, University of Florida, Gainesville, FL 32611
| | - Yan Yan
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Zewei Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Jun Jiang
- Department of Physics, University of Florida, Gainesville, FL 32611
- Quantum Theory Project, University of Florida, Gainesville, FL 32611
| | - Jiawei Zhang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Qiong Li
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106
| | - Yanjie He
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Zili Li
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332
| | - Lei Zhu
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106;
| | - Hai-Ping Cheng
- Department of Physics, University of Florida, Gainesville, FL 32611;
- Quantum Theory Project, University of Florida, Gainesville, FL 32611
- Center for Molecular Magnetic Quantum Materials, University of Florida, Gainesville, FL 32611
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332;
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14
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Improved Catalytic Activity of the High-Temperature Water Gas Shift Reaction on Metal-Exsolved La0.9Ni0.05Fe0.95O3 by Controlling Reduction Time. CHEMENGINEERING 2021. [DOI: 10.3390/chemengineering5020028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The catalyst exsolved from nickel-doped perovskite oxide, La0.9Ni0.05Fe0.95O3, has been proven to be effective for gas-phase reactions. To obtain the optimum amount of exsolved nanoparticles from the parent perovskite oxide, control of the reduction treatment condition is vital. Here, the effect of reduction time on the exsolved nanoparticle distribution, and thus the catalytic activity of the high-temperature water gas shift reaction (WGSR), was investigated. Upon conducting a wide range of characterizations, we assumed that the exsolution process might be a two-step process. Firstly, the surface oxygen is extracted. Secondly, due to the unstable perovskite structure, the Ni ions in the bulk La0.9Ni0.05Fe0.95O3 continuously diffuse toward the surface and, as the reduction progresses, more nuclei are generated to form a greater number of nanoparticles. This assumption is proven by the fact that, with an increase in the exsolution treatment time, the population of exsolution nanoparticles increases. Moreover, as the reduction time increases, the high-temperature WGSR activity also increases. The temperature-programmed measurements suggest that the exsolved nanoparticles are the active reaction sites. We believe that this study is helpful for understanding exsolution behavior during reduction treatment and, thus, developing a perovskite exsolution catalyst for the WGSR.
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15
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Celorrio V, Leach AS, Huang H, Hayama S, Freeman A, Inwood DW, Fermin DJ, Russell AE. Relationship between Mn Oxidation State Changes and Oxygen Reduction Activity in (La,Ca)MnO 3 as Probed by In Situ XAS and XES. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00997] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Veronica Celorrio
- Diamond Light Source Ltd, Diamond House. Harwell Campus, Didcot OX11 0DE, U.K
| | - Andrew S. Leach
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Haoliang Huang
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Shusaku Hayama
- Diamond Light Source Ltd, Diamond House. Harwell Campus, Didcot OX11 0DE, U.K
| | - Adam Freeman
- Diamond Light Source Ltd, Diamond House. Harwell Campus, Didcot OX11 0DE, U.K
| | - David W. Inwood
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - David J. Fermin
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
| | - Andrea E. Russell
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
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16
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Wang Z, Cao X, Peng D, Lu Y, Zhang B, Huang K, Zhang T, Wu J, Huang Y. Strained Ultralong Silver Nanowires for Enhanced Electrocatalytic Oxygen Reduction Reaction in Alkaline Medium. J Phys Chem Lett 2021; 12:2029-2035. [PMID: 33606546 DOI: 10.1021/acs.jpclett.1c00249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Many noble metals are efficient catalysts for oxygen reduction reaction (ORR), including silver (Ag). Among all these noble metals, Ag is the most affordable because of its relative abundance. Surface energy has been proven to play a crucial role in the catalytic process, and straining is an effective operation to raise the surface energy over electrocatalysts. In this work, sonication was utilized to induce strain in Ag nanowires (NWs) through lattice deformation. A 0.18 J/m2 improvement of the surface energy around the stacking faults area has been calculated via density functional theory. The diffusion-limiting current density was evaluated and increases by >20% (from -4.98 to -6.00 mA/cm2) after sonication straining. Meanwhile, the onset potential remains almost constant (i.e., 0.95 V vs RHE). The results show that induction of strain has a strong impact on the diffusion-limiting current density and significantly improves the ORR catalytic performance of Ag NWs.
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Affiliation(s)
- Zheng Wang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Xun Cao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Dongdong Peng
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Yu Lu
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Bowei Zhang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, 100083 Beijing, China
| | - Kang Huang
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, 100083 Beijing, China
| | - Tianyuan Zhang
- Department of Chemistry, University of Washington, Seattle, Washington, United States
| | - Junsheng Wu
- Institute for Advanced Materials and Technology, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, 100083 Beijing, China
| | - Yizhong Huang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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17
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Catalytic combustion of methane over La2BCoO6 perovskites containing Ni, Cu and Fe: impact of B-sites on oxygen species and catalytic activity. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01871-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Carbon Material and Cobalt-Substitution Effects in the Electrochemical Behavior of LaMnO 3 for ORR and OER. NANOMATERIALS 2020; 10:nano10122394. [PMID: 33266063 PMCID: PMC7759965 DOI: 10.3390/nano10122394] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/19/2020] [Accepted: 11/27/2020] [Indexed: 12/03/2022]
Abstract
LaMn1−xCoxO3 perovskites were synthesized by a modified sol-gel method which incorporates EDTA. These materials’ electrochemical activity towards both oxygen reduction (ORR) and oxygen evolution reactions (OER) was studied. The cobalt substitution level determines some physicochemical properties and, particularly, the surface concentration of Co and Mn’s different oxidation states. As a result, the electroactivity of perovskite materials can be tuned using their composition. The presence of cobalt at low concentration influences the catalytic activity positively, and better bifunctionality is attained. As in other perovskites, their low electrical conductivity limits their applicability in electrochemical devices. It was found that the electrochemical performance improved significantly by physically mixing with a mortar the active materials with two different carbon black materials. The existence of a synergistic effect between the electroactive component and the carbon material was interpreted in light of the strong carbon–oxygen–metal interaction. Some mixed samples are promising electrocatalysts towards both ORR and OER.
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19
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Sun X, Tiwari D, Fermin DJ. Promoting Active Electronic States in LaFeO 3 Thin-Films Photocathodes via Alkaline-Earth Metal Substitution. ACS APPLIED MATERIALS & INTERFACES 2020; 12:31486-31495. [PMID: 32539332 DOI: 10.1021/acsami.0c08174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The effects of alkaline-earth metal cation (AMC; Mg2+, Ca2+, Sr2+, and Ba2+) substitution on the photoelectrochemical properties of phase-pure LaFeO3 (LFO) thin-films are elucidated by X-ray photoemission spectroscopy (XPS), X-ray diffraction (XRD), diffuse reflectance, and electrochemical impedance spectroscopy (EIS). XRD confirms the formation of single-phase cubic LFO thin films with a rather complex dependence on the nature of the AMC and extent of substitution. Interestingly, subtle trends in lattice constant variations observed in XRD are closely correlated with shifts in the binding energies of Fe 2p3/2 and O 1s orbitals associated with the perovskite lattice. We establish a scaling factor between these two photoemission peaks, unveiling key correlation between Fe oxidation state and Fe-O covalency. Diffuse reflectance shows that optical transitions are little affected by AMC substitution below 10%, which are dominated by a direct bandgap transition close to 2.72 eV. Differential capacitance data obtained from EIS confirm the p-type characteristic of pristine LFO thin-films, revealing the presence of sub-bandgap electronic state (A-states) close to the valence band edge. The density of A-states is decreased upon AMC substitution, while the overall capacitance increases (increase in dopant level) and the apparent flat-band potential shifts toward more positive potentials. This behavior is consistent with the change in the valence band photoemission edge. In addition, capacitance data of cation-substituted films show the emergence of deeper states centered around 0.6 eV above the valence band edge (B-states). Photoelectrochemical responses toward the hydrogen evolution and oxygen reduction reactions in alkaline solutions show a complex dependence on alkaline-earth metal incorporation, reaching incident-photon-to-current conversion efficiency close to 20% in oxygen saturated solutions. We rationalize the photoresponses of the LFO films in terms of the effect sub-bandgap states on majority carrier mobility, charge transfer, and recombination kinetics.
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Affiliation(s)
- Xin Sun
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
| | - Devendra Tiwari
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
| | - David J Fermin
- School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, U.K
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20
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Freeman E, Kumar S, Thomas SR, Pickering H, Fermin DJ, Eslava S. PrFeO
3
Photocathodes Prepared Through Spray Pyrolysis. ChemElectroChem 2020. [DOI: 10.1002/celc.201902005] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Emma Freeman
- Department of Chemical Engineering University of Bath Claverton Down Bath BA2 7AY UK
- EPSRC Centre for Doctoral Training in Catalysis School of Chemistry Cardiff University Park Place Cardiff CF10 3AT UK
| | - Santosh Kumar
- Department of Chemical Engineering University of Bath Claverton Down Bath BA2 7AY UK
- Department of Chemical Engineering Imperial College London South Kensington, London SW7 2AZ UK
| | - Sophie R. Thomas
- Department of Chemical Engineering University of Bath Claverton Down Bath BA2 7AY UK
- EPSRC Centre for Doctoral Training in Catalysis School of Chemistry Cardiff University Park Place Cardiff CF10 3AT UK
| | - Hayley Pickering
- Department of Chemical Engineering University of Bath Claverton Down Bath BA2 7AY UK
| | - David J. Fermin
- School of Chemistry University of Bristol Cantock's close Bristol BS8 1TS UK
| | - Salvador Eslava
- Department of Chemical Engineering University of Bath Claverton Down Bath BA2 7AY UK
- Department of Chemical Engineering Imperial College London South Kensington, London SW7 2AZ UK
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21
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Ohrelius M, Guo H, Xian H, Yu G, Alshehri AA, Alzahrani KA, Li T, Andersson M. Electrochemical Synthesis of Ammonia Based on a Perovskite LaCrO
3
Catalyst. ChemCatChem 2019. [DOI: 10.1002/cctc.201901818] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Mathilda Ohrelius
- School of Materials and EnergyUniversity of Electronic Science and Technology of China Chengdu 611731 P.R. China
- Department of Energy SciencesLund University Lund SE-221 00 Sweden
| | - Haoran Guo
- School of Chemical SciencesUniversity of Chinese Academy of Sciences Beijing 100049 P.R. China
| | - Haohong Xian
- School of Materials and EnergyUniversity of Electronic Science and Technology of China Chengdu 611731 P.R. China
| | - Guangsen Yu
- School of Materials and EnergyUniversity of Electronic Science and Technology of China Chengdu 611731 P.R. China
| | | | - Khalid Ahmad Alzahrani
- Chemistry Department Faculty of ScienceKing Abdulaziz University Jeddah 21589 Saudi Arabia
| | - Tingshuai Li
- School of Materials and EnergyUniversity of Electronic Science and Technology of China Chengdu 611731 P.R. China
| | - Martin Andersson
- School of Materials and EnergyUniversity of Electronic Science and Technology of China Chengdu 611731 P.R. China
- Department of Energy SciencesLund University Lund SE-221 00 Sweden
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22
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Samira S, Gu XK, Nikolla E. Design Strategies for Efficient Nonstoichiometric Mixed Metal Oxide Electrocatalysts: Correlating Measurable Oxide Properties to Electrocatalytic Performance. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02505] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Samji Samira
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, United States
| | - Xiang-Kui Gu
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, United States
| | - Eranda Nikolla
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202, United States
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23
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Tian H, Lang X, Nan H, An P, Zhang W, Hu X, Zhang J. Nanosheet-assembled LaMnO3@NiCo2O4 nanoarchitecture growth on Ni foam for high power density supercapacitors. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.06.133] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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24
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Behnken J, Yu M, Deng X, Tüysüz H, Harms C, Dyck A, Wittstock G. Oxygen Reduction Reaction Activity of Mesostructured Cobalt‐Based Metal Oxides Studied with the Cavity‐Microelectrode Technique. ChemElectroChem 2019. [DOI: 10.1002/celc.201900722] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Julian Behnken
- DLR Institute of Networked Energy Systems 26129 Oldenburg Germany
- Institute of ChemistryCarl von Ossietzky University 26129 Oldenburg Germany
| | - Mingquan Yu
- Max-Planck-Institut für Kohlenforschung 45470 Mühlheim an der Ruhr Germany
| | - Xiaohui Deng
- Max-Planck-Institut für Kohlenforschung 45470 Mühlheim an der Ruhr Germany
| | - Harun Tüysüz
- Max-Planck-Institut für Kohlenforschung 45470 Mühlheim an der Ruhr Germany
| | - Corinna Harms
- DLR Institute of Networked Energy Systems 26129 Oldenburg Germany
| | - Alexander Dyck
- DLR Institute of Networked Energy Systems 26129 Oldenburg Germany
| | - Gunther Wittstock
- Institute of ChemistryCarl von Ossietzky University 26129 Oldenburg Germany
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25
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Bradley K, Giagloglou K, Hayden BE, Jungius H, Vian C. Reversible perovskite electrocatalysts for oxygen reduction/oxygen evolution. Chem Sci 2019; 10:4609-4617. [PMID: 31123571 PMCID: PMC6492633 DOI: 10.1039/c9sc00412b] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 03/19/2019] [Indexed: 11/21/2022] Open
Abstract
Reversible (bi-functional) ORR/OER electrocatalysts identified with the creation of mixed valent Mn perovskites and the Mn3+/Mn4+ surface redox couple.
The identification of electrocatalysts mediating both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are prerequisite for the development of reversible fuel cells and rechargeable metal–air batteries. The question remains as to whether a bifunctional catalyst, or a single catalyst site, will exhibit potentials converging to +1.23 VRHE. Transition metal-based perovskites provide tunable catalysts where site substitution can influence both ORR and OER, however substitution in the pseudo-binary phases results in an anti-correlation in ORR and OER activities. We reveal that LaxMnyNi1–yO3–δ, compositions with lanthanum A-site sub-stoichiometry exhibit reversible activity correlating with the appearance of the Mn3+/Mn4+ redox couple. The Mn3+/Mn4+ couple is associated with Mn4+ co-existing with Mn3+ in the bulk, as La3+ is substituted by Ni2+ at the A-site to create a mixed valent system. We also show that a direct A-site substitution by the Ca2+ cation in LaxCa1–xMnyO3–δ perovskites also results in the creation of Mn4+, the appearance of the Mn3+/Mn4+ redox couple, and a concomitant reversible activity. These results highlight a general strategy of optimizing oxide electrocatalysts with reversible activity.
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Affiliation(s)
- Kieren Bradley
- Ilika Technologies , Kenneth Dibben House, Enterprise Road, Southampton Science Park , Southampton , SO16 7NS , UK .
| | - Kyriakos Giagloglou
- Ilika Technologies , Kenneth Dibben House, Enterprise Road, Southampton Science Park , Southampton , SO16 7NS , UK .
| | - Brian E Hayden
- Ilika Technologies , Kenneth Dibben House, Enterprise Road, Southampton Science Park , Southampton , SO16 7NS , UK . .,Chemistry , University of Southampton , Highfield , Southampton , SO17 1BJ , UK
| | - Hugo Jungius
- Ilika Technologies , Kenneth Dibben House, Enterprise Road, Southampton Science Park , Southampton , SO16 7NS , UK .
| | - Chris Vian
- Ilika Technologies , Kenneth Dibben House, Enterprise Road, Southampton Science Park , Southampton , SO16 7NS , UK .
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26
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Oxygen Reduction Reaction Electrocatalysis in Alkaline Electrolyte on Glassy-Carbon-Supported Nanostructured Pr6O11 Thin-Films. Catalysts 2018. [DOI: 10.3390/catal8100461] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In this work, hierarchical nanostructured Pr6O11 thin-films of brain-like morphology were successfully prepared by electrostatic spray deposition (ESD) on glassy-carbon substrates. These surfaces were used as working electrodes in the rotating disk electrode (RDE) setup and characterized in alkaline electrolyte (0.1 M NaOH at 25 ± 2 °C) for the hydrogen evolution reaction (HER), the oxygen evolution reaction (OER), and the oxygen reduction reaction (ORR) for their potential application in alkaline electrolyzers or in alkaline fuel cells. The electrochemical performances of these electrodes were investigated as a function of their crystallized state (amorphous versus crystalline). Although none of the materials display spectacular HER and OER activity, the results show interesting performances of the crystallized sample towards the ORR with regards to this class of non-Pt group metal (non-PGM) electrocatalysts, the activity being, however, still far from a benchmark Pt/C electrocatalyst.
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27
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Gobaille‐Shaw GPA, Celorrio V, Calvillo L, Morris LJ, Granozzi G, Fermín DJ. Effect of Ba Content on the Activity of La 1-x Ba x MnO 3 Towards the Oxygen Reduction Reaction. ChemElectroChem 2018; 5:1922-1927. [PMID: 30263882 PMCID: PMC6146913 DOI: 10.1002/celc.201800052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Indexed: 01/01/2023]
Abstract
The electrocatalytic activity of La1-x Ba x MnO3 nanoparticles towards the oxygen reduction reaction (ORR) is investigated as a function of the A-site composition. Phase-pure oxide nanoparticles with a diameter in the range of 40 to 70 nm were prepared by using an ionic liquid route and deposited onto mesoporous carbon films. The structure and surface composition of the nanoparticles are probed by XRD, TEM, EDX, and XPS. Electrochemical studies carried out under alkaline conditions show a strong correlation between the activity of La1-x Ba x MnO3 and the effective number of reducible Mn sites at the catalysts layer. Our analysis demonstrates that, beyond controlling particle size and surface elemental segregation, understanding and controlling Mn coordination at the first atomic layer is crucial for increasing the performance of these materials.
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Affiliation(s)
- Gael. P. A. Gobaille‐Shaw
- School of ChemistryUniversity of Bristol Cantocks CloseBristolBS8 1TSUK
- EPSRC Centre for Doctoral Training in Catalysis School of ChemistryCardiff University Main BuildingPark PlaceCardiffCF10 3ATUK
| | - Veronica Celorrio
- School of ChemistryUniversity of Bristol Cantocks CloseBristolBS8 1TSUK
- UK Catalysis Hub, Research Complex at Harwell RAL, Oxford, OX11 0FA, UK and Kathleen Lonsdale Building Department of ChemistryUniversity College LondonGordon StreetLondonWC1H 0AJUK
| | - Laura Calvillo
- Dipartimento di Scienze ChimicheUniversità di PadovaVia Marzolo 135131PadovaItaly
| | - Louis J. Morris
- EPSRC Centre for Doctoral Training in Catalysis School of ChemistryCardiff University Main BuildingPark PlaceCardiffCF10 3ATUK
| | - Gaetano Granozzi
- Dipartimento di Scienze ChimicheUniversità di PadovaVia Marzolo 135131PadovaItaly
| | - David. J. Fermín
- School of ChemistryUniversity of Bristol Cantocks CloseBristolBS8 1TSUK
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28
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Celorrio V, Calvillo L, van den Bosch CAM, Granozzi G, Aguadero A, Russell AE, Fermín DJ. Mean Intrinsic Activity of Single Mn Sites at LaMnO
3
Nanoparticles Towards the Oxygen Reduction Reaction. ChemElectroChem 2018. [DOI: 10.1002/celc.201800729] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Veronica Celorrio
- School of ChemistryUniversity of Bristol Cantocks Close Bristol BS8 1TS UK
- UK Catalysis Hub, Research Complex at Harwell, RAL Oxford OX11 0FA UK
- Kathleen Lonsdale Building, Department of ChemistryUniversity College London Gordon Street London WC1H 0AJ UK
| | - Laura Calvillo
- Dipartimento di Scienze Chimiche and Unità di Ricerca INSTMUniversità di Padova Via Marzolo 1 35131 Padova Italy
| | | | - Gaetano Granozzi
- Dipartimento di Scienze Chimiche and Unità di Ricerca INSTMUniversità di Padova Via Marzolo 1 35131 Padova Italy
| | - Ainara Aguadero
- Department of MaterialsImperial College London London SW7 2AZ U.K
| | - Andrea E. Russell
- School of ChemistryUniversity of Southampton Highfield, Southampton U.K
| | - David J. Fermín
- School of ChemistryUniversity of Bristol Cantocks Close Bristol BS8 1TS UK
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29
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Stephenson J, Celorrio V, Tiwari D, Hall SR, Green DC, Fermín DJ. Photoelectrochemical properties of BiOCl microplatelets. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.10.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Celorrio V, Calvillo L, Granozzi G, Russell AE, Fermin DJ. AMnO 3 (A = Sr, La, Ca, Y) Perovskite Oxides as Oxygen Reduction Electrocatalysts. Top Catal 2018; 61:154-161. [PMID: 30956502 PMCID: PMC6413806 DOI: 10.1007/s11244-018-0886-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A series of perovskite-type manganites AMnO3 (A = Sr, La, Ca and Y) particles were investigated as electrocatalysts for the oxygen reduction reaction. AMnO3 materials were synthesized by means of an ionic-liquid method, yielding phase pure particles at different temperatures. Depending on the calcination temperature, particles with mean diameter between 20 and 150 nm were obtained. Bulk versus surface composition and structure are probed by X-ray photoelectron spectroscopy and extended X-ray absorption fine structure. Electrochemical studies were performed on composite carbon-oxide electrodes in alkaline environment. The electrocatalytic activity is discussed in terms of the effective Mn oxidation state, A:Mn particle surface ratio and the Mn-O distances.
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Affiliation(s)
- V. Celorrio
- School of Chemistry, University of Bristol, Cantocks Close, Bristol, BS8 1TS UK
| | - L. Calvillo
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padua, Italy
| | - G. Granozzi
- Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padua, Italy
| | - A. E. Russell
- School of Chemistry, University of Southampton, Highfield, Southampton, UK
| | - D. J. Fermin
- School of Chemistry, University of Bristol, Cantocks Close, Bristol, BS8 1TS UK
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31
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Zhou Y, Xi S, Wang J, Sun S, Wei C, Feng Z, Du Y, Xu ZJ. Revealing the Dominant Chemistry for Oxygen Reduction Reaction on Small Oxide Nanoparticles. ACS Catal 2017. [DOI: 10.1021/acscatal.7b03864] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Ye Zhou
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
- Solar
Fuels Laboratory, Nanyang Technological University, 50 Nanyang
Avenue, 639798 Singapore
| | - Shibo Xi
- Institute
of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, 627833 Singapore
| | - Jingxian Wang
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Shengnan Sun
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
- Solar
Fuels Laboratory, Nanyang Technological University, 50 Nanyang
Avenue, 639798 Singapore
| | - Chao Wei
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
- Solar
Fuels Laboratory, Nanyang Technological University, 50 Nanyang
Avenue, 639798 Singapore
| | - Zhenxing Feng
- School
of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331, United States
| | - Yonghua Du
- Institute
of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, 627833 Singapore
| | - Zhichuan J. Xu
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
- Solar
Fuels Laboratory, Nanyang Technological University, 50 Nanyang
Avenue, 639798 Singapore
- Energy
Research Institute @ Nanyang Technological University, 50 Nanyang
Avenue, 639798 Singapore
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32
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Sekar P, Calvillo L, Tubaro C, Baron M, Pokle A, Carraro F, Martucci A, Agnoli S. Cobalt Spinel Nanocubes on N-Doped Graphene: A Synergistic Hybrid Electrocatalyst for the Highly Selective Reduction of Carbon Dioxide to Formic Acid. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02166] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Pandiaraj Sekar
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Laura Calvillo
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Cristina Tubaro
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Marco Baron
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Anuj Pokle
- School
of Physics and CRANN, Trinity College Dublin, Dublin 2, Ireland
| | - Francesco Carraro
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
| | - Alex Martucci
- Department
of Industrial Engineering, University of Padova, via F. Marzolo
9, 35131 Padova, Italy
| | - Stefano Agnoli
- Department
of Chemical Science, University of Padova, Via F. Marzolo 1 35131 Padova, Italy
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33
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34
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Abstract
Oxygen reduction is considered a key reaction for electrochemical energy conversion but slow kinetics hamper application in fuel cells and metal-air batteries. In this review, the prospect of perovskite oxides for the oxygen reduction reaction (ORR) in alkaline media is reviewed with respect to fundamental insight into activity and possible mechanisms. For gaining these insights, special emphasis is placed on highly crystalline perovskite films that have only recently become available for electrochemical interrogation. The prospects for applications are evaluated based on recent progress in the synthesis of perovskite nanoparticles. The review concludes with the current understanding of oxygen reduction on perovskite oxides and a perspective on opportunities for future fundamental and applied research.
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35
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Xue Y, Miao H, Sun S, Wang Q, Li S, Liu Z. La1−xAgxMnO3 electrocatalyst with high catalytic activity for oxygen reduction reaction in aluminium air batteries. RSC Adv 2017. [DOI: 10.1039/c6ra25242g] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Ag doping is one of the best methods for improving the catalytic activity of LaMnO3 perovskites, and the mass specific activity of LAM-30 (La0.7Ag0.3MnO3) can reach 48.0 mA mg−1 which is about 32 times that of LAM-0 (LaMnO3).
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Affiliation(s)
- Yejian Xue
- Advanced Li-ion Battery Engineering Laboratory
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province
- Ningbo Institute of Materials Technology & Engineering
- Chinese Academy of Sciences
- P. R. China
| | - He Miao
- Advanced Li-ion Battery Engineering Laboratory
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province
- Ningbo Institute of Materials Technology & Engineering
- Chinese Academy of Sciences
- P. R. China
| | - Shanshan Sun
- Advanced Li-ion Battery Engineering Laboratory
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province
- Ningbo Institute of Materials Technology & Engineering
- Chinese Academy of Sciences
- P. R. China
| | - Qin Wang
- Advanced Li-ion Battery Engineering Laboratory
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province
- Ningbo Institute of Materials Technology & Engineering
- Chinese Academy of Sciences
- P. R. China
| | - Shihua Li
- Advanced Li-ion Battery Engineering Laboratory
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province
- Ningbo Institute of Materials Technology & Engineering
- Chinese Academy of Sciences
- P. R. China
| | - Zhaoping Liu
- Advanced Li-ion Battery Engineering Laboratory
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province
- Ningbo Institute of Materials Technology & Engineering
- Chinese Academy of Sciences
- P. R. China
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36
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Celorrio V, Calvillo L, Dann E, Granozzi G, Aguadero A, Kramer D, Russell AE, Fermín DJ. Oxygen reduction reaction at LaxCa1−xMnO3 nanostructures: interplay between A-site segregation and B-site valency. Catal Sci Technol 2016. [DOI: 10.1039/c6cy01105e] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detailed surface vs. bulk composition studies of LaxCa1−xMnO3 oxides provide clear evidence that the ORR activity increases as the effective electron population at the Mn site increases.
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Affiliation(s)
| | - Laura Calvillo
- Dipartimento di Scienze Chimiche
- Università di Padova
- 35131 Padova
- Italy
| | - Ellie Dann
- School of Chemistry
- University of Bristol
- Bristol
- UK
| | - Gaetano Granozzi
- Dipartimento di Scienze Chimiche
- Università di Padova
- 35131 Padova
- Italy
| | | | - Denis Kramer
- Engineering Sciences
- University of Southampton
- Southampton
- UK
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