1
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Wu L, Li Z, Xiang Y, Dong W, Qi X, Ling Z, Xu Y, Wu H, Levi MD, Shpigel N, Zhang X. Revisiting the Charging Mechanism of α-MnO 2 in Mildly Acidic Aqueous Zinc Electrolytes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2404583. [PMID: 39077979 DOI: 10.1002/smll.202404583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/05/2024] [Indexed: 07/31/2024]
Abstract
In recent years, there have been extensive debates regarding the charging mechanism of MnO2 cathodes in aqueous Zn electrolytes. The discussion centered on several key aspects including the identity of the charge carriers contributing to the overall capacity, the nature of the electrochemical process, and the role of the zinc hydroxy films that are reversibly formed during the charging/discharging. Intense studies are also devoted to understanding the effect of the Mn2+ additive on the performance of the cathodes. Nevertheless, it seems that a consistent explanation of the α-MnO2 charging mechanism is still lacking. To address this, a step-by-step analysis of the MnO2 cathodes is conducted. Valuable information is obtained by using in situ electrochemical quartz crystal microbalance with dissipation (EQCM-D) monitoring, supplemented by solid-state nuclear magnetic resonance (NMR), X-ray diffraction (XRD) in Characterization of Materials, and pH measurements. The findings indicate that the charging mechanism is dominated by the insertion of H3O+ ions, while no evidence of Zn2+ intercalation is found. The role of the Mn2+ additive in promoting the generation of protons by forming MnOOH, enhancing the stability of Zn/α-MnO2 batteries is thoroughly investigated. This work provides a comprehensive overview on the electrochemical and the chemical reactions associated with the α-MnO2 electrodes, and will pave the way for further development of aqueous cathodes for Zn-ion batteries.
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Affiliation(s)
- LangYuan Wu
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
| | - ZhiWei Li
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
| | - YuXuan Xiang
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, 310030, P. R. China
- School of Engineering, Westlake University, Hangzhou, Zhejiang, 310030, P. R. China
| | - WenDi Dong
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
| | - XiaoDong Qi
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
| | - ZhenXiao Ling
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
| | - YingHong Xu
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
| | - HaiYang Wu
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
| | - Mikhael D Levi
- Deparment of Chemistry and BINA-BIU Centre for Nanotechnology and Advanced Materials, Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Netanel Shpigel
- Department of Chemical Sciences, Ariel University, Ariel, 40700, Israel
| | - XiaoGang Zhang
- Jiangsu Key Laboratory of Materials and Technologies for Energy Storage, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
- Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
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2
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Zhang C, Zheng J, Su S, Jin Y, Chen Z, Wang Y, Xu J. Continuous and controllable synthesis of MnO 2 adsorbents for H 2S removal at low temperature. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134402. [PMID: 38688216 DOI: 10.1016/j.jhazmat.2024.134402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/15/2024] [Accepted: 04/23/2024] [Indexed: 05/02/2024]
Abstract
H2S is an extremely noxious impurity generated from nature and chemical industrial processes. High performing H2S adsorbents are required for chemical industry and environmental engineering. Herein, α-, γ-, and δ-MnO2 adsorbents with high sulfur capacity were synthesized through a continuous-flow approach with a microreactor system, achieving much higher efficiency than hydrothermal methods. The relationship between crystal structure and synthesis conditions such as residence time, reaction temperature, concentration of K+ in solution and reactant ratio is discussed. According to the H2S breakthrough tests at 150 °C, continuously prepared α-, γ-, and δ-MnO2 exhibited sulfur capacities of 669.5, 193.8 and 607.6 mg S/g sorbent, respectively, which was at a high level among the reported adsorbents. Such enhanced performance is related to the large surface area and mesopore volume, high reducibility, and a large number of oxygen species with high reactivity and mobility. Manganese sulfide and elemental sulfur were formed after desulfurization, which indicated the reaction consisted of two steps: redox and sulfidation of the sorbents. This study provides an innovative design strategy for the construction of nanomaterials with high H2S adsorption performances.
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Affiliation(s)
- Chenxiao Zhang
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Jinyu Zheng
- Sinopec Research Institute of Petroleum Processing Co., Ltd, Beijing 102299, China
| | - Shikun Su
- Sinopec Research Institute of Petroleum Processing Co., Ltd, Beijing 102299, China
| | - Ye Jin
- Sinopec Research Institute of Petroleum Processing Co., Ltd, Beijing 102299, China
| | - Zhuo Chen
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
| | - Yundong Wang
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Jianhong Xu
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
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3
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Andersen HL, Granados-Miralles C, Jensen KMØ, Saura-Múzquiz M, Christensen M. The Chemistry of Spinel Ferrite Nanoparticle Nucleation, Crystallization, and Growth. ACS NANO 2024; 18:9852-9870. [PMID: 38526912 PMCID: PMC11008356 DOI: 10.1021/acsnano.3c08772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 03/15/2024] [Accepted: 03/21/2024] [Indexed: 03/27/2024]
Abstract
The nucleation, crystallization, and growth mechanisms of MnFe2O4, CoFe2O4, NiFe2O4, and ZnFe2O4 nanocrystallites prepared from coprecipitated transition metal (TM) hydroxide precursors treated at sub-, near-, and supercritical hydrothermal conditions have been studied by in situ X-ray total scattering (TS) with pair distribution function (PDF) analysis, and in situ synchrotron powder X-ray diffraction (PXRD) with Rietveld analysis. The in situ TS experiments were carried out on 0.6 M TM hydroxide precursors prepared from aqueous metal chloride solutions using 24.5% NH4OH as the precipitating base. The PDF analysis reveals equivalent nucleation processes for the four spinel ferrite compounds under the studied hydrothermal conditions, where the TMs form edge-sharing octahedrally coordinated hydroxide units (monomers/dimers and in some cases trimers) in the aqueous precursor, which upon hydrothermal treatment nucleate through linking by tetrahedrally coordinated TMs. The in situ PXRD experiments were carried out on 1.2 M TM hydroxide precursors prepared from aqueous metal nitrate solutions using 16 M NaOH as the precipitating base. The crystallization and growth of the nanocrystallites were found to progress via different processes depending on the specific TMs and synthesis temperatures. The PXRD data show that MnFe2O4 and CoFe2O4 nanocrystallites rapidly grow (typically <1 min) to equilibrium sizes of 20-25 nm and 10-12 nm, respectively, regardless of applied temperature in the 170-420 °C range, indicating limited possibility of targeted size control. However, varying the reaction time (0-30 min) and temperature (150-400 °C) allows different sizes to be obtained for NiFe2O4 (3-30 nm) and ZnFe2O4 (3-12 nm) nanocrystallites. The mechanisms controlling the crystallization and growth (nucleation, growth by diffusion, Ostwald ripening, etc.) were examined by qualitative analysis of the evolution in refined scale factor (proportional to extent of crystallization) and mean crystallite volume (proportional to extent of growth). Interestingly, lower kinetic barriers are observed for the formation of the mixed spinels (MnFe2O4 and CoFe2O4) compared to the inverse (NiFe2O4) and normal (ZnFe2O4) spinel structured compounds, suggesting that the energy barrier for formation may be lowered when the TMs have no site preference.
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Affiliation(s)
- Henrik L. Andersen
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Madrid 28049, Spain
- Facultad
de Ciencias Físicas, Universidad
Complutense de Madrid, Madrid 28040, Spain
| | | | - Kirsten M. Ø. Jensen
- Department
of Chemistry and Nanoscience Center, University
of Copenhagen, København Ø, 2100, Denmark
| | - Matilde Saura-Múzquiz
- Facultad
de Ciencias Físicas, Universidad
Complutense de Madrid, Madrid 28040, Spain
| | - Mogens Christensen
- Department
of Chemistry and Interdisciplinary Nanoscience Center, Aarhus University, Aarhus C, 8000, Denmark
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4
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Noordhoek K, Bartel CJ. Accelerating the prediction of inorganic surfaces with machine learning interatomic potentials. NANOSCALE 2024. [PMID: 38470833 DOI: 10.1039/d3nr06468a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
The surface properties of solid-state materials often dictate their functionality, especially for applications where nanoscale effects become important. The relevant surface(s) and their properties are determined, in large part, by the material's synthesis or operating conditions. These conditions dictate thermodynamic driving forces and kinetic rates responsible for yielding the observed surface structure and morphology. Computational surface science methods have long been applied to connect thermochemical conditions to surface phase stability, particularly in the heterogeneous catalysis and thin film growth communities. This review provides a brief introduction to first-principles approaches to compute surface phase diagrams before introducing emerging data-driven approaches. The remainder of the review focuses on the application of machine learning, predominantly in the form of learned interatomic potentials, to study complex surfaces. As machine learning algorithms and large datasets on which to train them become more commonplace in materials science, computational methods are poised to become even more predictive and powerful for modeling the complexities of inorganic surfaces at the nanoscale.
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Affiliation(s)
- Kyle Noordhoek
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA.
| | - Christopher J Bartel
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA.
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5
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Juelsholt M, Aalling-Frederiksen O, Lindahl Christiansen T, Kjær ETS, Lefeld N, Kirsch A, Jensen KMØ. Influence of the Precursor Structure on the Formation of Tungsten Oxide Polymorphs. Inorg Chem 2023; 62:14949-14958. [PMID: 37658472 PMCID: PMC10520979 DOI: 10.1021/acs.inorgchem.3c01659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Indexed: 09/03/2023]
Abstract
Understanding material nucleation processes is crucial for the development of synthesis pathways for tailormade materials. However, we currently have little knowledge of the influence of the precursor solution structure on the formation pathway of materials. We here use in situ total scattering to show how the precursor solution structure influences which crystal structure is formed during the hydrothermal synthesis of tungsten oxides. We investigate the synthesis of tungsten oxide from the two polyoxometalate salts, ammonium metatungstate, and ammonium paratungstate. In both cases, a hexagonal ammonium tungsten bronze (NH4)0.25WO3 is formed as the final product. If the precursor solution contains metatungstate clusters, this phase forms directly in the hydrothermal synthesis. However, if the paratungstate B cluster is present at the time of crystallization, a metastable intermediate phase in the form of a pyrochlore-type tungsten oxide, WO3·0.5H2O, initially forms. The pyrochlore structure then undergoes a phase transformation into the tungsten bronze phase. Our studies thus experimentally show that the precursor cluster structure present at the moment of crystallization directly influences the formed crystalline phase and suggests that the precursor structure just prior to crystallization can be used as a tool for targeting specific crystalline phases of interest.
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Affiliation(s)
- Mikkel Juelsholt
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen 2100, Denmark
| | | | | | - Emil T. S. Kjær
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen 2100, Denmark
| | - Niels Lefeld
- Institute
of Inorganic Chemistry and Crystallography, University of Bremen, Leobener Strasse/NW2, D-28359 Bremen, Germany
| | - Andrea Kirsch
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen 2100, Denmark
| | - Kirsten M. Ø. Jensen
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen 2100, Denmark
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6
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Magnard NPL, Kirsch A, Jørgensen MRV, Kantor I, Sørensen DR, Huotari S, Rudić S, Bordallo HN, Jensen KMØ. Control of H-Related Defects in γ-MnO 2 in a Hydrothermal Synthesis. Inorg Chem 2023; 62:13021-13029. [PMID: 37537143 DOI: 10.1021/acs.inorgchem.3c01815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Manganese dioxide is a good candidate for effective energy storage and conversion as it possesses rich electrochemistry. The compound also shows a wide polymorphism. The γ-variety, an intergrowth of β- and R-MnO2, has been extensively studied in several types of batteries (e.g., Zn/MnO2, Li-ion) and is a common electrode material for commercial batteries. It is well known that the insertion of protons thermodynamically stabilizes γ-MnO2 with respect to β-MnO2. Protons can enter the structure either by forming groups of 4 hydroxyls around a Mn4+ vacancy, called a Ruetschi defect, or by forming a hydroxyl group near a Mn3+ ion, called a Coleman defect. These defects differently affect the electrochemistry of manganese oxide, and tailoring their amount in the structure can be used to tune the material properties. Previous studies have addressed the proton insertion process, but the role of the synthesis pathway on the amount of defects created is not well understood. We here investigate how the parameters in a hydrothermal synthesis of γ-MnO2 nanoparticles influence the amount and type of H-related defects. Structural investigations are carried out using Pair Distribution Function analysis, X-ray absorption spectroscopy, thermogravimetric analysis, and inelastic neutron scattering. We demonstrate the possibility to control the amount and type of defects introduced during the synthesis. While the amount of Ruetschi defects increases with synthesis temperature, it decreases with extended synthesis time, along with the amount of Coleman defects. Moreover, we discuss the arrangement of the defects in the γ-MnO2 nanoparticles.
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Affiliation(s)
| | - Andrea Kirsch
- Department of Chemistry, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Mads R V Jørgensen
- MAX IV Laboratory, 224 84 Lund, Sweden
- Department of Chemistry & iNANO, Aarhus University, 8000 Aarhus C, Denmark
| | - Innokenty Kantor
- MAX IV Laboratory, 224 84 Lund, Sweden
- Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Daniel R Sørensen
- MAX IV Laboratory, 224 84 Lund, Sweden
- Department of Chemistry & iNANO, Aarhus University, 8000 Aarhus C, Denmark
| | - Simo Huotari
- Department of Physics, University of Helsinki, 00014 Helsinki, Finland
| | - Svemir Rudić
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, STFC, Didcot OX11 0QX, U.K
| | - Heloisa N Bordallo
- Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Kirsten M Ø Jensen
- Department of Chemistry, University of Copenhagen, 2100 Copenhagen, Denmark
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7
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Pei Y, Wilkinson DP, Gyenge E. Insights into the Electrochemical Behavior of Manganese Oxides as Catalysts for the Oxygen Reduction and Evolution Reactions: Monometallic Core-Shell Mn/Mn 3 O 4. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2204585. [PMID: 36732852 DOI: 10.1002/smll.202204585] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 12/17/2022] [Indexed: 05/11/2023]
Abstract
Overcoming the sluggish electrode kinetics of both oxygen reduction and evolution reactions (ORR/OER) with non-precious metal electrocatalysts will accelerate the development of rechargeable metal-air batteries and regenerative fuel cells. The authors investigated the electrochemical behavior and ORR/OER catalytic activity of core-porous shell Mn/Mn3 O4 nanoparticles in comparison with other manganese dioxides (β- and γ-MnO2 ), and benchmarked against Pt/C and Pt/C-IrO2 . Under reversible operation in O2 -saturated 5 M KOH at 22 °C, the early stage activity of core-shell Mn/Mn3 O4 shows two times higher ORR and OER current density compared to the other MnO2 structures at 0.32 and 1.62 V versus RHE, respectively. It is revealed that Mn(III) oxidation to Mn(IV) is the primary cause of Mn/Mn3 O4 activity loss during ORR/OER potential cycling. To address it, an electrochemical activation method using Co(II) is proposed. By incorporating Co(II) into MnOx , new active sites are introduced and the content of Mn(II) is increased, which can stabilize the Mn(III) sites through comproportionation with Mn(IV). The Co-incorporated Mn/Mn3 O4 has superior activity and durability. Furthermore, it also surpassed the activity of Pt/C-IrO2 with similar durability. This study demonstrates that cost-effective ORR/OER catalysis is possible.
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Affiliation(s)
- Yu Pei
- Department of Chemical and Biological Engineering, Clean Energy Research Centre, The University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada
| | - David P Wilkinson
- Department of Chemical and Biological Engineering, Clean Energy Research Centre, The University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Előd Gyenge
- Department of Chemical and Biological Engineering, Clean Energy Research Centre, The University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada
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8
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Edgington J, Seitz LC. Advancing the Rigor and Reproducibility of Electrocatalyst Stability Benchmarking and Intrinsic Material Degradation Analysis for Water Oxidation. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- Jane Edgington
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Linsey C. Seitz
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3113, United States
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9
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Su H, Liu J, Hu Y, Ai T, Gong C, Lu J, Luo Y. Comparative Study of α- and β-MnO 2 on Methyl Mercaptan Decomposition: The Role of Oxygen Vacancies. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:775. [PMID: 36839143 PMCID: PMC9964818 DOI: 10.3390/nano13040775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 02/05/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
As a representative sulfur-containing volatile organic compounds (S-VOCs), CH3SH has attracted widespread attention due to its adverse environmental and health risks. The performance of Mn-based catalysts and the effect of their crystal structure on the CH3SH catalytic reaction have yet to be systematically investigated. In this paper, two different crystalline phases of tunneled MnO2 (α-MnO2 and β-MnO2) with the similar nanorod morphology were used to remove CH3SH, and their physicochemical properties were comprehensively studied using high-resolution transmission electron microscope (HRTEM) and electron paramagnetic resonance (EPR), H2-TPR, O2-TPD, Raman, and X-ray photoelectron spectroscopy (XPS) analysis. For the first time, we report that the specific reaction rate for α-MnO2 (0.029 mol g-1 h-1) was approximately 4.1 times higher than that of β-MnO2 (0.007 mol g-1 h-1). The as-synthesized α-MnO2 exhibited higher CH3SH catalytic activity towards CH3SH than that of β-MnO2, which can be ascribed to the additional oxygen vacancies, stronger surface oxygen migration ability, and better redox properties from α-MnO2. The oxygen vacancies on the catalyst surface provided the main active sites for the chemisorption of CH3SH, and the subsequent electron transfer led to the decomposition of CH3SH. The lattice oxygen on catalysts could be released during the reaction and thus participated in the further oxidation of sulfur-containing species. CH3SSCH3, S0, SO32-, and SO42- were identified as the main products of CH3SH conversion. This work offers a new understanding of the interface interaction mechanism between Mn-based catalysts and S-VOCs.
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Affiliation(s)
- Hong Su
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China
| | - Jiangping Liu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China
| | - Yanan Hu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China
| | - Tianhao Ai
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China
| | - Chenhao Gong
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China
| | - Jichang Lu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China
| | - Yongming Luo
- The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China
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10
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Hengge E, Ihrenberger J, Steyskal EM, Buzolin R, Luckabauer M, Sommitsch C, Würschum R. Porosity evolution and oxide formation in bulk nanoporous copper dealloyed from a copper-manganese alloy studied by in situ resistometry. NANOSCALE ADVANCES 2023; 5:393-404. [PMID: 36756274 PMCID: PMC9846480 DOI: 10.1039/d2na00618a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 11/07/2022] [Indexed: 06/18/2023]
Abstract
The synthesis of bulk nanoporous copper (npCu) from a copper-manganese alloy by electrochemical dealloying and free corrosion as well as the electrochemical behaviour of the dealloyed structures is investigated by in situ resistometry. In comparison to the well-established nanoporous gold (npAu) system, npCu shows strongly suppressed reordering processes in the porous structure (behind the etch front), which can be attributed to pronounced manganese oxide formation. Characteristic variations with the electrolyte concentration and potential applied for dealloying could be observed. Cyclic voltammetry was used to clarify the electrochemical behaviour of npCu. Oxide formation is further investigated by SEM and EDX revealing a hybrid composite of copper and manganese oxide on the surface of a metallic copper skeleton. Platelet-like structures embedded in the porous structure are identified which are rich in manganese oxide after prolonged dealloying. As an outlook, this unique heterogeneous structure with a large surface area and the inherent properties of manganese and copper oxides may offer application potential for the development of electrodes for energy storage and catalysis.
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Affiliation(s)
- Elisabeth Hengge
- Institute of Materials Physics, Graz University of Technology Petersgasse 16 A-8010 Graz Austria +43 316 873-8481
| | - Jakob Ihrenberger
- Institute of Materials Physics, Graz University of Technology Petersgasse 16 A-8010 Graz Austria +43 316 873-8481
| | - Eva-Maria Steyskal
- Institute of Materials Physics, Graz University of Technology Petersgasse 16 A-8010 Graz Austria +43 316 873-8481
| | - Ricardo Buzolin
- Institute of Materials Science, Joining and Forming, Graz University of Technology Kopernikusgasse 24 A-8010 Graz Austria
- Christian Doppler Laboratory for Design of High-Performance Alloys by Thermomechanical Processing Kopernikusgasse 24 8010 Graz Austria
| | - Martin Luckabauer
- Department of Mechanics of Solids, Surfaces and Systems, Faculty of Engineering Technology, University of Twente Drienerlolaan 5 7522NB Enschede The Netherlands
| | - Christof Sommitsch
- Institute of Materials Science, Joining and Forming, Graz University of Technology Kopernikusgasse 24 A-8010 Graz Austria
| | - Roland Würschum
- Institute of Materials Physics, Graz University of Technology Petersgasse 16 A-8010 Graz Austria +43 316 873-8481
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11
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Carlson EZ, Chueh WC, Mefford JT, Bajdich M. Selectivity of Electrochemical Ion Insertion into Manganese Dioxide Polymorphs. ACS APPLIED MATERIALS & INTERFACES 2023; 15:1513-1524. [PMID: 36546548 DOI: 10.1021/acsami.2c16589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The ion insertion redox chemistry of manganese dioxide has diverse applications in energy storage, catalysis, and chemical separations. Unique properties derive from the assembly of Mn-O octahedra into polymorphic structures that can host protons and nonprotonic cations in interstitial sites. Despite many reports on individual ion-polymorph couples, much less is known about the selectivity of electrochemical ion insertion in MnO2. In this work, we use density functional theory to holistically compare the electrochemistry of AxMnO2 (where A = H+, Li+, Na+, K+, Mg2+, Ca2+, Zn2+, Al3+) in aqueous and nonaqueous electrolytes. We develop an efficient computational scheme demonstrating that Hubbard-U correction has a greater impact on calculating accurate redox energetics than choice of exchange-correlation functional. Using PBE+U, we find that for nonprotonic cations, ion selectivity depends on the oxygen coordination environments inside a polymorph. When H+ is present, however, the driving force to form hydroxyl bonds is usually stronger. In aqueous electrolytes, only three ion-polymorph pairs are thermodynamically stable within water's voltage stability window (Na+ and K+ in α-MnO2, and Li+ in λ-MnO2), with all other ion insertion being metastable. We find Al3+ may insert into the δ, R, and λ polymorphs across the full 2-electron redox of MnO2 at high voltage; however, electrolytes for multivalent ions must be designed to impede the formation of insoluble precipitates and facilitate cation desolvation. We also show that small ions coinsert with water in α-MnO2 to achieve greater coordination by oxygen, while solvation energies and kinetic effects dictate water coinsertion in δ-MnO2. Taken together, these findings explain reports of mixed ion insertion mechanisms in aqueous electrolytes and highlight promising design strategies for safe, high energy density electrochemical energy storage, desalination batteries, and electrocatalysts.
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Affiliation(s)
- Evan Z Carlson
- Department of Materials Science & Engineering, Stanford University, Stanford, California94305, United States
| | - William C Chueh
- Department of Materials Science & Engineering, Stanford University, Stanford, California94305, United States
| | - J Tyler Mefford
- Department of Materials Science & Engineering, Stanford University, Stanford, California94305, United States
| | - Michal Bajdich
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California94025, United States
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12
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Luo J, Ren G, Campbell BM, Zhang D, Cao T, Mishra R, Sadtler B. Spontaneous Seed Formation during Electrodeposition Drives Epitaxial Growth of Metastable Bismuth Selenide Microcrystals. J Am Chem Soc 2022; 144:18272-18285. [PMID: 36173417 DOI: 10.1021/jacs.2c05261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Materials with metastable phases can exhibit vastly different properties from their thermodynamically favored counterparts. Methods to synthesize metastable phases without the need for high-temperature or high-pressure conditions would facilitate their widespread use. We report on the electrochemical growth of microcrystals of bismuth selenide, Bi2Se3, in the metastable orthorhombic phase at room temperature in aqueous solution. Rather than direct epitaxy with the growth substrate, the spontaneous formation of a seed layer containing nanocrystals of cubic BiSe enforces the metastable phase. We first used single-crystal silicon substrates with a range of resistivities and different orientations to identify the conditions needed to produce the metastable phase. When the applied potential during electrochemical growth is positive of the reduction potential of Bi3+, an initial, Bi-rich seed layer forms. Electron microscopy imaging and diffraction reveal that the seed layer consists of nanocrystals of cubic BiSe embedded within an amorphous matrix of Bi and Se. Using density functional theory calculations, we show that epitaxial matching between cubic BiSe and orthorhombic Bi2Se3 can help stabilize the metastable orthorhombic phase over the thermodynamically stable rhombohedral phase. The spontaneous formation of the seed layer enables us to grow orthorhombic Bi2Se3 on a variety of substrates including single-crystal silicon with different orientations, polycrystalline fluorine-doped tin oxide, and polycrystalline gold. The ability to stabilize the metastable phase through room-temperature electrodeposition in aqueous solution without requiring a single-crystal substrate broadens the range of applications for this semiconductor in optoelectronic and electrochemical devices.
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Affiliation(s)
- Jiang Luo
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Guodong Ren
- Institute of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, United States
| | - Brandon M Campbell
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Dongyan Zhang
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States
| | - Tengfei Cao
- Department of Mechanical Engineering & Materials Science, Washington University, St. Louis, Missouri 63130, United States
| | - Rohan Mishra
- Institute of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, United States.,Department of Mechanical Engineering & Materials Science, Washington University, St. Louis, Missouri 63130, United States
| | - Bryce Sadtler
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, United States.,Institute of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, United States
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13
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Magnard NPL, Anker AS, Aalling-Frederiksen O, Kirsch A, Jensen KMØ. Characterisation of intergrowth in metal oxide materials using structure-mining: the case of γ-MnO 2. Dalton Trans 2022; 51:17150-17161. [PMID: 36156665 PMCID: PMC9678240 DOI: 10.1039/d2dt02153f] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Manganese dioxide compounds are widely used in electrochemical applications e.g. as electrode materials or photocatalysts. One of the most used polymorphs is γ-MnO2 which is a disordered intergrowth of pyrolusite β-MnO2 and ramsdellite R-MnO2. The presence of intergrowth defects alters the material properties, however, they are difficult to characterise using standard X-ray diffraction due to anisotropic broadening of Bragg reflections. We here propose a characterisation method for intergrown structures by modelling of X-ray diffraction patterns and pair distribution functions (PDF) using γ-MnO2 as an example. Firstly, we present a fast peak-fitting analysis approach, where features in experimental diffraction patterns and PDFs are matched to simulated patterns from intergrowth structures, allowing quick characterisation of defect densities. Secondly, we present a structure-mining-based analysis using simulated γ-MnO2 superstructures which are compared to our experimental data to extract trends on defect densities with synthesis conditions. We applied the methodology to a series of γ-MnO2 samples synthesised by a hydrothermal route. Our results show that with synthesis time, the intergrowth structure reorders from a R-like to a β-like structure, with the β-MnO2 fraction ranging from ca. 27 to 82% in the samples investigated here. Further analysis of the structure-mining results using machine learning can enable extraction of more nanostructural information such as the distribution and size of intergrown domains in the structure. Using this analysis, we observe segregation of R- and β-MnO2 domains in the manganese oxide nanoparticles. While R-MnO2 domains keep a constant size of ca. 1–2 nm, the β-MnO2 domains grow with synthesis time. A methodology for characterisation of γ-MnO2 intergrowths has been developed. By combining supercell modelling, structure-mining and machine learning, both qualitative and quantitative information on intergrowth domain distributions are extracted.![]()
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Affiliation(s)
- Nicolas P L Magnard
- Department of Chemistry and Nano-Science Center, University of Copenhagen, 2100 Copenhagen Ø, Denmark.
| | - Andy S Anker
- Department of Chemistry and Nano-Science Center, University of Copenhagen, 2100 Copenhagen Ø, Denmark.
| | | | - Andrea Kirsch
- Department of Chemistry and Nano-Science Center, University of Copenhagen, 2100 Copenhagen Ø, Denmark.
| | - Kirsten M Ø Jensen
- Department of Chemistry and Nano-Science Center, University of Copenhagen, 2100 Copenhagen Ø, Denmark.
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14
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Sarkar S, Sarkar S, Patra AK. Single crystalline manganite (γ‒MnOOH) rods enclosed with high index facets and its excellent catalytic conversion of Lignin‒Derived feedstock. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Dataset of solution-based inorganic materials synthesis procedures extracted from the scientific literature. Sci Data 2022; 9:231. [PMID: 35614129 PMCID: PMC9132903 DOI: 10.1038/s41597-022-01317-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 04/05/2022] [Indexed: 11/10/2022] Open
Abstract
The development of a materials synthesis route is usually based on heuristics and experience. A possible new approach would be to apply data-driven approaches to learn the patterns of synthesis from past experience and use them to predict the syntheses of novel materials. However, this route is impeded by the lack of a large-scale database of synthesis formulations. In this work, we applied advanced machine learning and natural language processing techniques to construct a dataset of 35,675 solution-based synthesis procedures extracted from the scientific literature. Each procedure contains essential synthesis information including the precursors and target materials, their quantities, and the synthesis actions and corresponding attributes. Every procedure is also augmented with the reaction formula. Through this work, we are making freely available the first large dataset of solution-based inorganic materials synthesis procedures. Measurement(s) | solution-based inorganic synthesis data | Technology Type(s) | natural language processing |
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16
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Portehault D, Gómez-Recio I, Baron MA, Musumeci V, Aymonier C, Rouchon V, Le Godec Y. Geoinspired syntheses of materials and nanomaterials. Chem Soc Rev 2022; 51:4828-4866. [PMID: 35603716 DOI: 10.1039/d0cs01283a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The search for new materials is intimately linked to the development of synthesis methods. In the current urge for the sustainable synthesis of materials, taking inspiration from Nature's ways to process matter appears as a virtuous approach. In this review, we address the concept of geoinspiration for the design of new materials and the exploration of new synthesis pathways. In geoinspiration, materials scientists take inspiration from the key features of various geological systems and processes occurring in nature, to trigger the formation of artificial materials and nanomaterials. We discuss several case studies of materials and nanomaterials to highlight the basic geoinspiration concepts underlying some synthesis methods: syntheses in water and supercritical water, thermal shock syntheses, molten salt synthesis and high pressure synthesis. We show that the materials emerging from geoinspiration exhibit properties differing from materials obtained by other pathways, thus demonstrating that the field opens up avenues to new families of materials and nanomaterials. This review focuses on synthesis methodologies, by drawing connections between geosciences and materials chemistry, nanosciences, green chemistry, and environmental sciences.
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Affiliation(s)
- David Portehault
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, 75005 Paris, France.
| | - Isabel Gómez-Recio
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, 75005 Paris, France.
| | - Marzena A Baron
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, 75005 Paris, France.
| | - Valentina Musumeci
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Cyril Aymonier
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Virgile Rouchon
- IFP Energies nouvelles (IFPEN), Rond point de l'échangeur de Solaize - BP 3, 69360 Solaize, France
| | - Yann Le Godec
- Sorbonne Université, CNRS, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 4 place Jussieu, F-75005, Paris, France
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17
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Liu J, Sheng A, Li X, Arai Y, Ding Y, Nie M, Yan M, Rosso KM. Understanding the Importance of Labile Fe(III) during Fe(II)-Catalyzed Transformation of Metastable Iron Oxyhydroxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3801-3811. [PMID: 35188748 DOI: 10.1021/acs.est.1c08044] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Transformation of metastable Fe(III) oxyhydroxides is a prominent process in natural environments and can be significantly accelerated by the coexisting aqueous Fe(II) (Fe(II)aq). Recent evidence points to the solution mass transfer of labile Fe(III) (Fe(III)labile) as the primary intermediate species of general importance. However, a mechanistic aspect that remains unclear is the dependence of phase outcomes on the identity of the metastable Fe(III) oxyhydroxide precursor. Here, we compared the coupled evolution of Fe(II) species, solid phases, and Fe(III)labile throughout the Fe(II)-catalyzed transformation of lepidocrocite (Lp) versus ferrihydrite (Fh) at equal Fe(III) mass loadings with 0.2-1.0 mM Fe(II)aq at pH = 7.0. Similar to Fh, the conversion of Lp to product phases occurs by a dissolution-reprecipitation mechanism mediated by Fe(III)labile that seeds the nucleation of products. Though for Fh we observed a transformation to goethite (Gt), accompanied by the transient emergence and decline of Lp, for initial Lp we observed magnetite (Mt) as the main product. A linear correlation between the formation rate of Mt and the effective supersaturation in terms of Fe(III)labile concentration shows that Fe(II)-induced transformation of Lp into Mt is governed by the classical nucleation theory. When Lp is replaced by equimolar Gt, Mt formation is suppressed by opening a lower barrier pathway to Gt by heterogeneous nucleation and growth on the added Gt seeds. The collective findings add to the mechanistic understanding of factors governing phase selections that impact iron bioavailability, system redox potential, and the fate and transport of coupled elements.
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Affiliation(s)
- Juan Liu
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Anxu Sheng
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Xiaoxu Li
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Yuji Arai
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 1102 South Goodwin Avenue, Urbana, Illinois 61801, United States
| | - Yuefei Ding
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Mingjun Nie
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Mingquan Yan
- The Key Laboratory of Water and Sediment Sciences, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Kevin M Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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18
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Yang X, Zhang H, Xu W, Yu B, Liu Y, Wu Z. A doping element improving the properties of catalysis: in situ Raman spectroscopy insights into Mn-doped NiMn layered double hydroxide for the urea oxidation reaction. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00308b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Potential dependent in situ Raman spectra confirm that Mn doping enables a negative shift in Ni(ii) oxidation onset potential.
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Affiliation(s)
- Xu Yang
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Huimin Zhang
- School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China
| | - Wei Xu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Binbin Yu
- College of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, China
| | - Yan Liu
- School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
| | - Zucheng Wu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
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19
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Powell-Palm MJ. Calculation of a temperature–volume phase diagram of water to inform the study of isochoric freezing down to cryogenic temperatures. RSC Adv 2022; 12:20603-20609. [PMID: 35919185 PMCID: PMC9288857 DOI: 10.1039/d2ra03683e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 07/11/2022] [Indexed: 11/21/2022] Open
Abstract
Phase diagrams are integral to the application and interpretation of materials thermodynamics, and none is more ubiquitous than the common temperature–pressure diagram of water and its many icy phases. Inspired by recent advances in isochoric thermodynamics, we here employ a simple convex hull approach to efficiently calculate an updated temperature–volume phase diagram for water and five of its solid polymorphs from existing Helmholtz free energy data. We proceed to highlight fundamental similarities between this T–V diagram and conventional binary temperature–concentration (T–x) diagrams, provide the volume coordinates of a variety of three-phase invariant reactions (e.g. “confined” or “volumetric” eutectics, peritectics, etc.) that occur amongst the phases of pure water under isochoric or confined conditions, and calculate the phase fraction evolution of ice Ih with temperature along multiple isochores of interest to experimental isochoric freezing. This work provides a requisite baseline upon which to extend the study of isochoric freezing to cryogenic temperatures, with potential applications in thermodynamic metrology, cryovolcanism, and cryopreservation. A new temperature–volume phase diagram is reported for water and five of its icy polymorphs, enabling new interrogation of isochoric freezing processes down to 190 K.![]()
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Affiliation(s)
- Matthew J. Powell-Palm
- Department of Mechanical Engineering, Texas A&M University, College Station, TX 7783, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 7783, USA
- Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720, USA
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20
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Sun Y, Zhang Y, Li W, Zhang W, Xu Z, Dai M, Zhao G. Combination of the endophytic manganese-oxidizing bacterium Pantoea eucrina SS01 and biogenic Mn oxides: An efficient and sustainable complex in degradation and detoxification of malachite green. CHEMOSPHERE 2021; 280:130785. [PMID: 33971420 DOI: 10.1016/j.chemosphere.2021.130785] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 04/08/2021] [Accepted: 04/28/2021] [Indexed: 06/12/2023]
Abstract
Recently, Mn oxides (MnOxs) have been attracting considerable interest in the oxidation of organic pollutants. However, the reduction of MnOx in these reactions leads to the deactivation of the catalyst, which must be frequently regenerated. We evaluated the application of a manganese-oxidizing bacterium (MOB) and MnOx in removing toxic dyes. We studied the co-function of a plant-endophytic MOB, Pantoea eucrina SS01, with its bio-generated MnOx and evaluated the detoxification activity and chemical transformation mechanisms of the complex in malachite green (MG) degradation. We found a synergistic effect between MnOx and the strain. Particularly, strain SS01 could adsorb MG but could not degrade it, whereas the addition of Mn(II) promoted MG degradation by the formation of a complex containing the bacterium and MnOx aggregates (SS01-bio-MnOx), with distinct morphology characteristics. The complex showed a marked sustainability in the degradation of MG into less toxic or non-toxic metabolites. In this process, strain SS01 might have enhanced the regeneration of MnOx, accelerating MG degradation. Our data not only contribute to understanding the mechanism of MG removal by the SS01-bio-MnOx complex, but also provide a scientific basis for the future application of MOB and MnOx.
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Affiliation(s)
- Yuankai Sun
- College of Life Science, Shandong Normal University, Jinan, 250014, PR China
| | - Yonggang Zhang
- College of Life Science, Shandong Normal University, Jinan, 250014, PR China
| | - Wenzhe Li
- College of Life Science, Shandong Normal University, Jinan, 250014, PR China
| | - Wenchang Zhang
- College of Life Science, Shandong Normal University, Jinan, 250014, PR China
| | - Zhenlu Xu
- College of Life Science, Shandong Normal University, Jinan, 250014, PR China
| | - Meixue Dai
- College of Life Science, Shandong Normal University, Jinan, 250014, PR China
| | - Guoyan Zhao
- College of Life Science, Shandong Normal University, Jinan, 250014, PR China.
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21
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Sassi M, Chaka AM, Rosso KM. Ab initio thermodynamics reveals the nanocomposite structure of ferrihydrite. Commun Chem 2021; 4:134. [PMID: 36697713 PMCID: PMC9814694 DOI: 10.1038/s42004-021-00562-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/04/2021] [Indexed: 01/28/2023] Open
Abstract
Ferrihydrite is a poorly crystalline iron oxyhydroxide nanomineral that serves a critical role as the most bioavailable form of ferric iron for living systems. However, its atomic structure and composition remain unclear due in part to ambiguities in interpretation of X-ray scattering results. Prevailing models so far have not considered the prospect that at the level of individual nanoparticles multiple X-ray indistinguishable phases could coexist. Using ab initio thermodynamics we show that ferrihydrite is likely a nanocomposite of distinct structure types whose distribution depends on particle size, temperature, and hydration. Nanoparticles of two contrasting single-phase ferrihydrite models of Michel and Manceau are here shown to be thermodynamically equivalent across a wide range of temperature and pressure conditions despite differences in their structural water content. Higher temperature and water pressure favor the formation of the former, while lower temperature and water pressure favor the latter. For aqueous suspensions at ambient conditions, their coexistence is maximal for particle sizes up to 12 nm. The predictions inform and help resolve different observations in various experiments.
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Affiliation(s)
- Michel Sassi
- grid.451303.00000 0001 2218 3491Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352 USA
| | - Anne M. Chaka
- grid.451303.00000 0001 2218 3491Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352 USA
| | - Kevin M. Rosso
- grid.451303.00000 0001 2218 3491Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99352 USA
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22
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Udayakantha M, Handy JV, Davidson RD, Kaur J, Villalpando G, Zuin L, Chakraborty S, Banerjee S. Halide Replacement with Complete Preservation of Crystal Lattice in Mixed‐Anion Lanthanide Oxyhalides. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Malsha Udayakantha
- Department of Chemistry Department of Materials Science and Engineering Texas A&M University College Station TX 77843 USA
| | - Joseph V. Handy
- Department of Chemistry Department of Materials Science and Engineering Texas A&M University College Station TX 77843 USA
| | - Rachel D. Davidson
- Department of Chemistry Department of Materials Science and Engineering Texas A&M University College Station TX 77843 USA
| | - Jagjit Kaur
- Materials Theory for Energy Scavenging (MATES) Lab Department of Physics Indian Institute of Technology Indore Simrol Indore 453552 India
| | - Graciela Villalpando
- Department of Chemistry Department of Materials Science and Engineering Texas A&M University College Station TX 77843 USA
| | - Lucia Zuin
- Canadian Light Source University of Saskatchewan Saskatoon SK S7N 2V3 Canada
| | - Sudip Chakraborty
- Materials Theory for Energy Scavenging (MATES) Lab Department of Physics Indian Institute of Technology Indore Simrol Indore 453552 India
| | - Sarbajit Banerjee
- Department of Chemistry Department of Materials Science and Engineering Texas A&M University College Station TX 77843 USA
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23
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Udayakantha M, Handy JV, Davidson RD, Kaur J, Villalpando G, Zuin L, Chakraborty S, Banerjee S. Halide Replacement with Complete Preservation of Crystal Lattice in Mixed-Anion Lanthanide Oxyhalides. Angew Chem Int Ed Engl 2021; 60:15582-15589. [PMID: 33783069 DOI: 10.1002/anie.202104231] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Indexed: 11/10/2022]
Abstract
A challenge in anion control in periodic solids is to preserve the crystal lattice while substituting for different anions of widely varying size and hardness. Post-synthetic modification routes that place cations or anions in non-equilibrium configurations are promising; however, such methods remain relatively unexplored for anion placement. Here, we report the synthesis of LaOI nanocrystals by a non-hydrolytic sol-gel condensation reaction and their transformation into LaOBr, LaOCl, and LaOF nanocrystals along hard-soft acid-base principles using post-synthetic metathesis reactions with ammonium halides. Anion displacement proceeds along halide planes, preserving the tetragonal matlockite structure. Energy-variant X-ray excited optical luminesce signatures of alloyed Tb3+ -ions is a sensitive quantum reporter of the preservation of the cation sublattice and hardening of the crystal structure upon anion replacement.
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Affiliation(s)
- Malsha Udayakantha
- Department of Chemistry, Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Joseph V Handy
- Department of Chemistry, Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Rachel D Davidson
- Department of Chemistry, Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Jagjit Kaur
- Materials Theory for Energy Scavenging (MATES) Lab, Department of Physics, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Graciela Villalpando
- Department of Chemistry, Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Lucia Zuin
- Canadian Light Source, University of Saskatchewan, Saskatoon, SK, S7N 2V3, Canada
| | - Sudip Chakraborty
- Materials Theory for Energy Scavenging (MATES) Lab, Department of Physics, Indian Institute of Technology Indore, Simrol, Indore, 453552, India
| | - Sarbajit Banerjee
- Department of Chemistry, Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843, USA
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25
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Van Groeningen N, Christl I, Kretzschmar R. The Effect of Aeration on Mn(II) Sorbed to Clay Minerals and Its Impact on Cd Retention. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:1650-1658. [PMID: 33444011 DOI: 10.1021/acs.est.0c05875] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Manganese is a redox-sensitive element in soils and sediments that plays an important role in the retention of trace elements. Under anoxic conditions, clay minerals were shown to increase Cd retention by favoring the precipitation of Mn(II) phases. In this study, we investigated the influence of aeration on anoxically formed Mn solid phases and its impact on Cd retention in the presence of two clay minerals with low Fe contents, a natural kaolinite (KGa-1b) and a synthetic montmorillonite (Syn-1). Ca-saturated KGa-1b and Syn-1 were pre-equilibrated with Mn2+ and Cd2+ under anoxic conditions for 1 or 30 days and subsequently exposed to air for 1 or 30 days. The analysis with synchrotron X-ray absorption spectroscopy (XAS) revealed that extended anoxic pre-equilibration (30 days) partially prevented the oxidation of sorbed Mn(II) (MnSiO3 and Mn(II)Al-LDH). Extended exposure to ambient air and short anoxic pre-equilibration favored the formation of feitknechtite (β-MnOOH) and birnessite (δ-MnO2). Aeration resulted in a decrease of pH and a net release of Cd2+ into the solution, indicating that Cd re-sorption by Mn(III/IV)-phases was insufficient to compensate for the release of Cd2+ due to dissolution of Mn(II)-containing phases and the decrease in pH. Our results demonstrate the significance of clay minerals in the (trans)formation of Mn-containing phases and their impact on trace metal retention in environments undergoing fluctuating redox conditions.
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Affiliation(s)
- Natacha Van Groeningen
- Institute of Biogeochemistry and Pollutant Dynamics, Department of Environmental Systems Science, CHN, ETH Zürich, 8092 Zürich, Switzerland
| | - Iso Christl
- Institute of Biogeochemistry and Pollutant Dynamics, Department of Environmental Systems Science, CHN, ETH Zürich, 8092 Zürich, Switzerland
| | - Ruben Kretzschmar
- Institute of Biogeochemistry and Pollutant Dynamics, Department of Environmental Systems Science, CHN, ETH Zürich, 8092 Zürich, Switzerland
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Braham EJ, Davidson RD, Al-Hashimi M, Arróyave R, Banerjee S. Navigating the design space of inorganic materials synthesis using statistical methods and machine learning. Dalton Trans 2020; 49:11480-11488. [PMID: 32743629 DOI: 10.1039/d0dt02028a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Data-driven approaches have brought about a revolution in manufacturing; however, challenges persist in their applications to synthetic strategies. Their application to the deterministic navigation of reaction trajectories to stabilize crystalline solids with precise composition, atomic connectivity, microstructural dimensionality, and surface structure remains a frontier in inorganic materials research. The design of synthetic methodologies for the preparation of inorganic materials is often inefficient in terms of exploration of potentially vast design spaces spanning multiple process variables, reaction sequences, as well as structural parameters and reactivities of precursors and structure-directing agents. Reported synthetic methods are further limited in terms of the insight they provide into underlying chemical and physical principles. The recent surge in interest in accelerating the discovery of new materials can be considered as an opportunity to re-evaluate our approach to materials synthesis, and for considering new frameworks for exploration that are systematic and strategic in approach. Herein, we outline with the help of several illustrative examples, the challenges, opportunities, and limitations of data-driven synthesis design. The account collates discussion of design-of-experiments sampling methods, machine learning modeling, and active learning to develop experimental workflows that accelerate the experimental navigation of synthetic landscapes.
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Affiliation(s)
- Erick J Braham
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA. and Department of Material Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Rachel D Davidson
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA. and Department of Material Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Mohammed Al-Hashimi
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Raymundo Arróyave
- Department of Material Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA. and Department of Material Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
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Espiritu E, Chamberlain KD, Williams JC, Allen JP. Bound manganese oxides capable of reducing the bacteriochlorophyll dimer of modified reaction centers from Rhodobacter sphaeroides. PHOTOSYNTHESIS RESEARCH 2020; 143:129-141. [PMID: 31641987 DOI: 10.1007/s11120-019-00680-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
A biohybrid model system is described that interfaces synthetic Mn-oxides with bacterial reaction centers to gain knowledge concerning redox reactions by metal clusters in proteins, in particular the Mn4CaO5 cluster of photosystem II. The ability of Mn-oxides to bind to modified bacterial reaction centers and transfer an electron to the light-induced oxidized bacteriochlorophyll dimer, P+, was characterized using optical spectroscopy. The environment of P was altered to obtain a high P/P+ midpoint potential. In addition, different metal-binding sites were introduced by substitution of amino acid residues as well as extension of the C-terminus of the M subunit with the C-terminal region of the D1 subunit of photosystem II. The Mn-compounds MnO2, αMn2O3, Mn3O4, CaMn2O4, and Mn3(PO4)2 were tested and compared to MnCl2. In general, addition of the Mn-compounds resulted in a decrease in the amount of P+ while the reduced quinone was still present, demonstrating that the Mn-compounds can serve as secondary electron donors. The extent of P+ reduction for the Mn-oxides was largest for αMn2O3 and CaMn2O4 and smallest for Mn3O4 and MnO2. The addition of Mn3(PO4)2 resulted in nearly complete P+ reduction, similar to MnCl2. Overall, the activity was correlated with the initial oxidation state of the Mn-compound. Transient optical measurements showed a fast kinetic component, assigned to reduction of P+ by the Mn-oxide, in addition to a slow component due to charge recombination. The results support the conjecture that the incorporation of Mn-oxides by ancient anoxygenic phototrophs was a step in the evolution of oxygenic photosynthesis.
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Affiliation(s)
- Eduardo Espiritu
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287-1604, USA
| | - Kori D Chamberlain
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287-1604, USA
| | - JoAnn C Williams
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287-1604, USA
| | - James P Allen
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287-1604, USA.
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Fleer NA, Thomas MP, Andrews JL, Waetzig GR, Gonzalez O, Liu GW, Guiton BS, Banerjee S. Epitaxial stabilization versus interdiffusion: synthetic routes to metastable cubic HfO 2 and HfV 2O 7 from the core-shell arrangement of precursors. NANOSCALE 2019; 11:21354-21363. [PMID: 31674612 DOI: 10.1039/c9nr07316g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Metastable materials that represent excursions from thermodynamic minima are characterized by distinctive structural motifs and electronic structure, which frequently underpins new function. The binary oxides of hafnium present a rich diversity of crystal structures and are of considerable technological importance given their high dielectric constants, refractory characteristics, radiation hardness, and anion conductivity; however, high-symmetry tetragonal and cubic polymorphs of HfO2 are accessible only at substantially elevated temperatures (1720 and 2600 °C, respectively). Here, we demonstrate that the core-shell arrangement of VO2 and amorphous HfO2 promotes outwards oxygen diffusion along an electropositivity gradient and yields an epitaxially matched V2O3/HfO2 interface that allows for the unprecedented stabilization of the metastable cubic polymorph of HfO2 under ambient conditions. Free-standing cubic HfO2, otherwise accessible only above 2600 °C, is stabilized by acid etching of the vanadium oxide core. In contrast, interdiffusion under oxidative conditions yields the negative thermal expansion material HfV2O7. Variable temperature powder X-ray diffraction demonstrate that the prepared HfV2O7 exhibits pronounced negative thermal expansion in the temperature range between 150 and 700 °C. The results demonstrate the potential of using epitaxial crystallographic relationships to facilitate preferential nucleation of otherwise inaccessible metastable compounds.
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Affiliation(s)
- Nathan A Fleer
- Department of Chemistry, Texas A&M University, 3255 TAMU, 580 Ross St, College Station, Texas 77843, USA. and Department of Materials Science and Engineering, Texas A&M University, 575 Ross St, College Station, Texas 77843, USA
| | - Melonie P Thomas
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA.
| | - Justin L Andrews
- Department of Chemistry, Texas A&M University, 3255 TAMU, 580 Ross St, College Station, Texas 77843, USA. and Department of Materials Science and Engineering, Texas A&M University, 575 Ross St, College Station, Texas 77843, USA
| | - Gregory R Waetzig
- Department of Chemistry, Texas A&M University, 3255 TAMU, 580 Ross St, College Station, Texas 77843, USA. and Department of Materials Science and Engineering, Texas A&M University, 575 Ross St, College Station, Texas 77843, USA
| | - Oscar Gonzalez
- Department of Chemistry, Texas A&M University, 3255 TAMU, 580 Ross St, College Station, Texas 77843, USA.
| | - Guan-Wen Liu
- Department of Chemistry, Texas A&M University, 3255 TAMU, 580 Ross St, College Station, Texas 77843, USA. and Department of Materials Science and Engineering, Texas A&M University, 575 Ross St, College Station, Texas 77843, USA
| | - Beth S Guiton
- Department of Chemistry, University of Kentucky, 505 Rose Street, Lexington, Kentucky 40506, USA.
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, 3255 TAMU, 580 Ross St, College Station, Texas 77843, USA. and Department of Materials Science and Engineering, Texas A&M University, 575 Ross St, College Station, Texas 77843, USA
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Patel AM, Nørskov JK, Persson KA, Montoya JH. Efficient Pourbaix diagrams of many-element compounds. Phys Chem Chem Phys 2019; 21:25323-25327. [DOI: 10.1039/c9cp04799a] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient method for constructing pourbaix diagrams of many-element compounds reveals the electrochemical stability of complex materials in aqueous environments.
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Affiliation(s)
- Anjli M. Patel
- Department of Chemical Engineering
- Stanford University
- Stanford
- USA
| | - Jens K. Nørskov
- Department of Physics
- Technical University of Denmark
- Lyngby
- Denmark
| | - Kristin A. Persson
- Lawrence Berkeley National Laboratory and Department of Materials Science
- University of California
- Berkeley
- USA
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