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Cherkashinin G, Eilhardt R, Nappini S, Cococcioni M, Píš I, Dal Zilio S, Bondino F, Marzari N, Magnano E, Alff L. Energy Level Alignment at the Cobalt Phosphate/Electrolyte Interface: Intrinsic Stability vs Interfacial Chemical Reactions in 5 V Lithium Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2022; 14:543-556. [PMID: 34932299 DOI: 10.1021/acsami.1c16296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The intrinsic stability of the 5 V LiCoPO4-LiCo2P3O10 thin-film (carbon-free) cathode material coated with MoO3 thin layer is studied using a comprehensive synchrotron electron spectroscopy in situ approach combined with first-principle calculations. The atomic-molecular level study demonstrates fully reversible electronic properties of the cathode after the first electrochemical cycle. The polyanionic oxide is not involved in chemical reactions with the fluoroethylene-containing liquid electrolyte even when charged to 5.1 V vs Li+/Li. The high stability of the cathode is explained on the basis of the developed energy level model. In contrast, the chemical composition of the cathode-electrolyte interface evolves continuously by involving MoO3 in the decomposition reaction with consequent leaching of oxide from the surface. The proposed mechanisms of chemical reactions are attributed to external electrolyte oxidation via charge transfer from the relevant electron level to the MoO3 valence band state and internal electrolyte oxidation via proton transfer to the solvents. This study provides a deeper insight into the development of both a doping strategy to enhance the electronic conductivity of high-voltage cathode materials and an efficient surface coating against unfavorable interfacial chemical reactions.
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Affiliation(s)
- Gennady Cherkashinin
- Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, D-64287 Darmstadt, Germany
| | - Robert Eilhardt
- Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, D-64287 Darmstadt, Germany
| | - Silvia Nappini
- IOM CNR Laboratorio TASC, Strada Statale 14, km 163,5 in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Matteo Cococcioni
- Physics Department, University of Pavia, Via Bassi 6, I-27100 Pavia, Italy
| | - Igor Píš
- IOM CNR Laboratorio TASC, Strada Statale 14, km 163,5 in Area Science Park, 34149 Basovizza, Trieste, Italy
- Elettra─Sincrotrone Trieste S.C.p.A., 34149 Basovizza, Trieste, Italy
| | - Simone Dal Zilio
- IOM CNR Laboratorio TASC, Strada Statale 14, km 163,5 in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Federica Bondino
- IOM CNR Laboratorio TASC, Strada Statale 14, km 163,5 in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Nicola Marzari
- Theory and Simulation of Materials (THEOS), and National Centre for Computational Design and Discovery of Novel Materials (MARVEL), Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Elena Magnano
- IOM CNR Laboratorio TASC, Strada Statale 14, km 163,5 in Area Science Park, 34149 Basovizza, Trieste, Italy
- Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park 2006, Johannesburg, South Africa
| | - Lambert Alff
- Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, D-64287 Darmstadt, Germany
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Raman and XANES Spectroscopic Study of the Influence of Coordination Atomic and Molecular Environments in Biomimetic Composite Materials Integrated with Dental Tissue. NANOMATERIALS 2021; 11:nano11113099. [PMID: 34835863 PMCID: PMC8625886 DOI: 10.3390/nano11113099] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/11/2021] [Accepted: 11/15/2021] [Indexed: 12/18/2022]
Abstract
In this work, for the first time, the influence of the coordination environment as well as Ca and P atomic states on biomimetic composites integrated with dental tissue was investigated. Bioinspired dental composites were synthesised based on nanocrystalline calcium carbonate-substituted hydroxyapatite Ca4ICa6IIPO46−xCO3x+yOH2−y (nano-cHAp) obtained from a biogenic source and a set of polar amino acids that modelled the organic matrix. Biomimetic composites, as well as natural dental tissue samples, were investigated using Raman spectromicroscopy and synchrotron X-ray absorption near edge structure (XANES) spectroscopy. Molecular structure and energy structure studies revealed several important features related to the different calcium atomic environments. It was shown that biomimetic composites created in order to reproduce the physicochemical properties of dental tissue provide good imitation of molecular and electron energetic properties, including the carbonate anion CO32− and the atomic Ca/P ratio in nanocrystals. The features of the molecular structure of biomimetic composites are inherited from the nano-cHAp (to a greater extent) and the amino acid cocktail used for their creation, and are caused by the ratio between the mineral and organic components, which is similar to the composition of natural enamel and dentine. In this case, violation of the nano-cHAp stoichiometry, which is the mineral basis of the natural and bioinspired composites, as well as the inclusion of different molecular groups in the nano-cHAp lattice, do not affect the coordination environment of phosphorus atoms. The differences observed in the molecular and electron energetic structures of the natural enamel and dentine and the imitation of their properties by biomimetic materials are caused by rearrangement in the local environment of the calcium atoms in the HAp crystal lattice. The surface of the nano-cHAp crystals in the natural enamel and dentine involved in the formation of bonds with the organic matrix is characterised by the coordination environment of the calcium atom, corresponding to its location in the CaI position—that is, bound through common oxygen atoms with PO4 tetrahedrons. At the same time, on the surface of nano-cHAp crystals in bioinspired dental materials, the calcium atom is characteristically located in the CaII position, bound to the hydroxyl OH group. The features detected in the atomic and molecular coordination environment in nano-cHAp play a fundamental role in recreating a biomimetic dental composite of the natural organomineral interaction in mineralised tissue and will help to find an optimal way to integrate the dental biocomposite with natural tissue.
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Tufail MK, Ahmad N, Yang L, Zhou L, Naseer MA, Chen R, Yang W. A panoramic view of Li7P3S11 solid electrolytes synthesis, structural aspects and practical challenges for all-solid-state lithium batteries. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2021.09.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Colocho Hurtarte LC, Santana Amorim HC, Kruse J, Criginski Cezar J, Klysubun W, Prietzel J. A Novel Approach for the Quantification of Different Inorganic and Organic Phosphorus Compounds in Environmental Samples by P L 2,3-Edge X-ray Absorption Near-Edge Structure (XANES) Spectroscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:2812-2820. [PMID: 32068384 DOI: 10.1021/acs.est.9b07018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Phosphorus (P) is an essential element for life on Earth, with an important and oftentimes unaccounted organic biogeochemical component. Current methods for the quantification of different organic P compounds in environmental samples (e.g., soils, sediments) are based on extraction techniques and often associated with incomplete P recovery or sample changes. In this study, we present a protocol for the quantification of different organic and inorganic P species in soils using synchrotron-based X-ray absorption near-edge structure (XANES) spectroscopy at the P L2,3-edge. Its accuracy and precision was evaluated by analyzing 40 standard mixtures composed of seven different inorganic and organic P compounds (with a mean of R2 = 0.85). In addition, we quantified the P species of two soils and two agro-industrial byproducts using P L2,3-edge XANES spectroscopy and the results were compared with those obtained by P K-edge XANES or 31P NMR spectroscopy. Using the P L2,3-edge, we identified different organic P species, including those not identified by the common P K-edge XANES. However, there is a consistent underestimation of organic polyphosphates. Overall, the application of P L2,3-edge XANES provides a higher level of information than by P K-edge XANES, although the ubiquitous use of this novel methodology is still limited to samples with a phosphorus content above 3 mg g-1.
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Affiliation(s)
- Luis Carlos Colocho Hurtarte
- Lehrstuhl für Bodenkunde, Research Department Ecology and Ecosystem Management, Technische Universität München, Emil-Ramann-Straße 2, 85354 Freising, Germany
| | - Helen Carla Santana Amorim
- Universidade Federal de Lavras, Departamento de Ciência do Solo, 1001 Av. Doutor Silvio Menicucci, Lavras, MG 37200-000, Brazil
| | - Jens Kruse
- Institute of Bio- and Geosciences, Agrosphere Institute (IBG-3), Forschungszentrum Jülich GmbH, Wilhelm Johnen Straße, 52425 Jülich, Germany
- Institute of Crop Science and Resource Conservation (INRES), Soil Science and Soil Ecology, University Bonn, Nussallee 13, 53115 Bonn, Germany
| | - Julio Criginski Cezar
- Laboratório Nacional de Luz Síncrotron (LNLS) -Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Campinas, SP 13083-971, Brazil
| | - Wantana Klysubun
- Synchrotron Light Research Institute, Muang District, 111 University Avenue, Nakhon Ratchasima 30000, Thailand
| | - Jörg Prietzel
- Lehrstuhl für Bodenkunde, Research Department Ecology and Ecosystem Management, Technische Universität München, Emil-Ramann-Straße 2, 85354 Freising, Germany
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Xiao W, Sun Q, Banis MN, Wang B, Liang J, Lushington A, Li R, Li X, Sham TK, Sun X. Unveiling the Interfacial Instability of the Phosphorus/Carbon Anode for Sodium-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2019; 11:30763-30773. [PMID: 31343156 DOI: 10.1021/acsami.9b07884] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
As a competitive anode material for sodium-ion batteries (SIBs), a commercially available red phosphorus, featured with a high theoretical capacity (2596 mA h g-1) and a suitable operating voltage plateau (0.1-0.6 V), has been confronted with a severe structural instability and a rapid capacity degradation upon large volumetric change. In particular, the fundamental determining factors for phosphorus anode materials are yet poorly understood, and their interfacial stability against ambient air has not been explored and clarified. Herein, a high-performance phosphorus/carbon anode material has been fabricated simply through ball-milling the carbon black and red phosphorus, delivering a high reversible capacity of 1070 mA h g-1 at 400 mA g-1 after 200 cycles and a superior rate capability of 479 mA h g-1 at 3200 mA g-1. More importantly, we first reveal the significance of inhibiting the exposure of phosphorus/carbon electrode materials to air, even for a short period, for achieving a good electrochemical performance, which would sharply decrease the reversible capacities. With the assistance of synchrotron-based X-ray techniques, the formation and accumulation of insulating phosphate compounds can be spectroscopically identified, leading to the decay of electrochemical performance. At the same time, these passivation layers on the surface of electrode were found to occur via a self-oxidation process in ambient air. To maintain the electrochemical advantages of phosphorus anodes, it is necessary to inhibit their contact with air through a rational coating or an optimal storage condition. Additionally, the employment of a fluoroethylene carbonate (FEC) additive facilitates the decomposition of the electrolyte and favors the formation of a robust solid electrolyte interphase layer, which may suppress the side reactions between the active Na-P compounds and the electrolyte. These findings could help improve the surface protection and interfacial stability of phosphorus anodes for high-performance SIBs.
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Affiliation(s)
- Wei Xiao
- Department of Mechanical & Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Qian Sun
- Department of Mechanical & Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada
| | - Mohammad Norouzi Banis
- Department of Mechanical & Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada
| | - Biqiong Wang
- Department of Mechanical & Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Jianneng Liang
- Department of Mechanical & Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada
| | - Andrew Lushington
- Department of Mechanical & Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada
| | - Ruying Li
- Department of Mechanical & Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada
| | - Xifei Li
- Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering , Xi'an University of Technology , Xi'an 710048 , Shaanxi , China
| | - Tsun-Kong Sham
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Xueliang Sun
- Department of Mechanical & Materials Engineering , University of Western Ontario , London , Ontario N6A 5B9 , Canada
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Xiang C, Wang H, Ji Q, Zhang G, Qu J. Tracking Internal Electron Shuttle Using X-ray Spectroscopies in La/Zr Hydroxide for Reconciliation of Charge-Transfer Interaction and Coordination toward Phosphate. ACS APPLIED MATERIALS & INTERFACES 2019; 11:24699-24706. [PMID: 31246397 DOI: 10.1021/acsami.9b05397] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Metallic hydroxides have been applied as the adsorbents of oxyanion contaminants, with the oxygen-bonded metal (M-O) considered as the core site for adsorption. For enhanced adsorption toward oxyanions, multimetallic modification of M-O is a promising approach for high removal performance. Here, bimetallic La/Zr hydroxides were prepared via a solvothermal route with varying La/Zr dosages. Bimetallic La/Zr hydroxides exhibited higher oxyanion adsorption capacity than La or Zr hydroxide. A maximum phosphate adsorption capacity of ∼160 mg g-1 was achieved under the La/Zr atomic ratio of 1:1, representing a new record among comparable adsorbents. X-ray photoelectron spectroscopy and X-ray absorption near-edge structure (XANES) spectroscopy showed that the incorporation of [LaO6] and [ZrO6] can induce an internal charge shuttle owing to the electronegativity difference of La and Zr. The charge transfers from La to Zr through the surrounding O 2p ligand, where the electrons in the highest occupied molecular orbitals of the [LaO6] octahedron filled unoccupied π orbitals of [ZrO6]. The as-induced internal electron shuttle in the bimetallic hydroxides primarily strengthened the formation of [MO6]···PO4 species (backdonation interaction). Further, the σP-O donation interaction between [LaO6] and [PO4] was clearly increased via intensification of the covalent coordination with O, as confirmed by the P K-edge XANES spectra for the as-used samples.
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Affiliation(s)
- Chao Xiang
- College of Environmental Science and Engineering , Beijing Forestry University , Beijing 100083 , China
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , China
| | - Hongjie Wang
- College of Environmental Science and Engineering , Beijing Forestry University , Beijing 100083 , China
| | - Qinghua Ji
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , China
| | - Gong Zhang
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , China
| | - Jiuhui Qu
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , China
- Key Laboratory of Drinking Water Science and Technology Research Centre for Eco-Environmental Sciences , Chinese Academy of Sciences , Beijing 100085 , China
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Deng S, Ai C, Luo M, Liu B, Zhang Y, Li Y, Lin S, Pan G, Xiong Q, Liu Q, Wang X, Xia X, Tu J. Coupled Biphase (1T-2H)-MoSe 2 on Mold Spore Carbon for Advanced Hydrogen Evolution Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901796. [PMID: 31172634 DOI: 10.1002/smll.201901796] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/24/2019] [Indexed: 06/09/2023]
Abstract
Performance breakthrough of MoSe2 -based hydrogen evolution reaction (HER) electrocatalysts largely relies on sophisticated phase modulation and judicious innovation on conductive matrix/support. In this work the controllable synthesis of phosphate ion (PO43- ) intercalation induced-MoSe2 (P-MoSe2 ) nanosheets on N-doped mold spore carbon (N-MSC) forming P-MoSe2 /N-MSC composite electrocatalysts is realized. Impressively, a novel conductive N-MSC matrix is constructed by a facile mold fermentation method. Furthermore, the phase of MoSe2 can be modulated by a simple phosphorization strategy to realize the conversion from 2H-MoSe2 to 1T-MoSe2 to produce biphase-coexisted (1T-2H)-MoSe2 by PO43- intercalation (namely, P-MoSe2 ), confirmed by synchrotron radiation technology and spherical aberration-corrected TEM (SACTEM). Notably, higher conductivity, lower bandgap and adsorption energy of H+ are verified for the P-MoSe2 /N-MSC with the help of density functional theory (DFT) calculation. Benefiting from these unique advantages, the P-MoSe2 /N-MSC composites show superior HER performance with a low Tafel slope (≈51 mV dec-1 ) and overpotential (≈126 mV at 10 mA cm-1 ) and excellent electrochemical stability, better than 2H-MoSe2 /N-MSC and MoSe2 /carbon nanosphere (MoSe2 /CNS) counterparts. This work demonstrates a new kind of carbon material via biological cultivation, and simultaneously unravels the phase transformation mechanism of MoSe2 by PO43- intercalation.
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Affiliation(s)
- Shengjue Deng
- State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Changzhi Ai
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
| | - Mi Luo
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201210, P. R. China
| | - Bo Liu
- State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yan Zhang
- State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yahao Li
- State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Shiwei Lin
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China
| | - Guoxiang Pan
- Department of Materials Chemistry, Huzhou University, Huzhou, 313000, P. R. China
| | - Qinqin Xiong
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, Zhejiang, China
| | - Qi Liu
- Department of Physics, City University of Hong Kong, Kowloon, 999077, Hong Kong
| | - Xiuli Wang
- State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xinhui Xia
- State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Jiangping Tu
- State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
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Kornienko N, Heidary N, Cibin G, Reisner E. Catalysis by design: development of a bifunctional water splitting catalyst through an operando measurement directed optimization cycle. Chem Sci 2018; 9:5322-5333. [PMID: 30009004 PMCID: PMC6009440 DOI: 10.1039/c8sc01415a] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 05/07/2018] [Indexed: 11/30/2022] Open
Abstract
A critical challenge in energy research is the development of earth abundant and cost-effective materials that catalyze the electrochemical splitting of water into hydrogen and oxygen at high rates and low overpotentials. Key to addressing this issue lies not only in the synthesis of new materials, but also in the elucidation of their active sites, their structure under operating conditions and ultimately, extraction of the structure-function relationships used to spearhead the next generation of catalyst development. In this work, we present a complete cycle of synthesis, operando characterization, and redesign of an amorphous cobalt phosphide (CoP x ) bifunctional catalyst. The research was driven by integrated electrochemical analysis, Raman spectroscopy and gravimetric measurements utilizing a novel quartz crystal microbalance spectroelectrochemical cell to uncover the catalytically active species of amorphous CoP x and subsequently modify the material to enhance the activity of the elucidated catalytic phases. Illustrating the power of our approach, the second generation cobalt-iron phosphide (CoFePx) catalyst, developed through an iteration of the operando measurement directed optimization cycle, is superior in both hydrogen and oxygen evolution reactivity over the previous material and is capable of overall water electrolysis at a current density of 10 mA cm-2 with 1.5 V applied bias in 1 M KOH electrolyte solution.
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Affiliation(s)
- Nikolay Kornienko
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - Nina Heidary
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
| | - Giannantonio Cibin
- Diamond Light Source Ltd. , Diamond House, Harwell Science and Innovation Campus , Didcot OX11 0DE , UK
| | - Erwin Reisner
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK .
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Han YS, Jeong HY, Hyun SP, Hayes KF, Chon CM. Beam-induced redox transformation of arsenic during As K-edge XAS measurements: availability of reducing or oxidizing agents and As speciation. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:763-770. [PMID: 29714186 DOI: 10.1107/s1600577518002576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
During X-ray absorption spectroscopy (XAS) measurements of arsenic (As), beam-induced redox transformation is often observed. In this study, the As species immobilized by poorly crystallized mackinawite (FeS) was assessed for the susceptibility to beam-induced redox reactions as a function of sample properties including the redox state of FeS and the solid-phase As speciation. The beam-induced oxidation of reduced As species was found to be mediated by the atmospheric O2 and the oxidation products of FeS [e.g. Fe(III) (oxyhydr)oxides and intermediate sulfurs]. Regardless of the redox state of FeS, both arsenic sulfide and surface-complexed As(III) readily underwent the photo-oxidation upon exposure to the atmospheric O2 during XAS measurements. With strict O2 exclusion, however, both As(0) and arsenic sulfide were less prone to the photo-oxidation by Fe(III) (oxyhydr)oxides than NaAsO2 and/or surface-complexed As(III). In case of unaerated As(V)-reacted FeS samples, surface-complexed As(V) was photocatalytically reduced during XAS measurements, but arsenic sulfide did not undergo the photo-reduction.
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Affiliation(s)
- Young Soo Han
- Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Deajeon 34132, Republic of Korea
| | - Hoon Young Jeong
- Department of Geological Sciences, Pusan Natinal University, Busan 46241, Republic of Korea
| | - Sung Pil Hyun
- Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Deajeon 34132, Republic of Korea
| | - Kim F Hayes
- Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI 48105, USA
| | - Chul Min Chon
- Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Deajeon 34132, Republic of Korea
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Dietrich C, Koerver R, Gaultois MW, Kieslich G, Cibin G, Janek J, Zeier WG. Spectroscopic characterization of lithium thiophosphates by XPS and XAS – a model to help monitor interfacial reactions in all-solid-state batteries. Phys Chem Chem Phys 2018; 20:20088-20095. [DOI: 10.1039/c8cp01968a] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Shift of binding energies upon depolymerization of superionic lithium thiophosphates.
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Affiliation(s)
- Christian Dietrich
- Institute of Physical Chemistry
- Justus-Liebig-University Giessen
- D-35392 Giessen
- Germany
| | - Raimund Koerver
- Institute of Physical Chemistry
- Justus-Liebig-University Giessen
- D-35392 Giessen
- Germany
| | - Michael W. Gaultois
- Leverhulme Research Centre for Functional Materials Design
- The Materials Innovation Factory
- Department of Chemistry
- University of Liverpool
- Liverpool
| | - Gregor Kieslich
- Department of Chemistry
- Technical University of Munich
- D-85748 Garching
- Germany
| | | | - Jürgen Janek
- Institute of Physical Chemistry
- Justus-Liebig-University Giessen
- D-35392 Giessen
- Germany
- BELLA – Batteries and Electrochemistry Laboratory
| | - Wolfgang G. Zeier
- Institute of Physical Chemistry
- Justus-Liebig-University Giessen
- D-35392 Giessen
- Germany
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Pavlychev AA, Avrunin AS, Vinogradov AS, Filatova EO, Doctorov AA, Krivosenko YS, Samoilenko DO, Svirskiy GI, Konashuk AS, Rostov DA. Local electronic structure and nanolevel hierarchical organization of bone tissue: theory and NEXAFS study. NANOTECHNOLOGY 2016; 27:504002. [PMID: 27875332 DOI: 10.1088/0957-4484/27/50/504002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Theoretical and experimental investigations of native bone are carried out to understand relationships between its hierarchical organization and local electronic and atomic structure of the mineralized phase. The 3D superlattice model of a coplanar assembly of the hydroxyapatite (HAP) nanocrystallites separated by the hydrated nanolayers is introduced to account the interplay of short-, long- and super-range order parameters in bone tissue. The model is applied to (i) predict and rationalize the HAP-to-bone spectral changes in the electronic structure and (ii) describe the mechanisms ensuring the link of the hierarchical organization with the electronic structure of the mineralized phase in bone. To check the predictions the near-edge x-ray absorption fine structure (NEXAFS) at the Ca 2p, P 2p and O 1s thresholds is measured for native bone and compared with NEXAFS for reference compounds. The NEXAFS analysis has demonstrated the essential hierarchy induced HAP-to-bone red shifts of the Ca and P 2p-to-valence transitions. The lowest O 1s excitation line at 532.2 eV in bone is assigned with superposition of core transitions in the hydroxide OH-(H2O) m anions, Ca2+(H2O) n cations, the carboxyl groups inside the collagen and [PO4]2- and [PO4]- anions with unsaturated P-O bonds.
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Affiliation(s)
- A A Pavlychev
- Solid State Electronics Department, St. Petersburg State University, St. Petersburg, 198504, Russian Federation
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Chemical nature of alkaline polyphosphate boundary film at heated rubbing surfaces. Sci Rep 2016; 6:26008. [PMID: 27180956 PMCID: PMC4867429 DOI: 10.1038/srep26008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/25/2016] [Indexed: 11/09/2022] Open
Abstract
Alkaline polyphosphate has been demonstrated to be able to reduce significant wear and friction of sliding interfaces under heavy loads (>1 GPa) and elevated temperature (800 °C and above) conditions, e.g. hot metal manufacturing. The chemical composition and fine structure of polyphosphate lubricating film is not well understood as well as the role of alkaline elements within the reaction film at hot rubbing surface. This work makes use of the coupling surface analytical techniques on the alkaline polyphosphate tribofilm, XANES, TOF-SIMS and FIB/TEM. The data show the composition in gradient distribution and trilaminar structure of tribofilm: a shorter chain phosphate overlying a long chain polyphosphate that adheres onto oxide steel base through a short chain phosphate. The chemical hardness model well explains the anti-abrasive mechanism of alkaline polyphosphate at elevated temperatures and also predicts a depolymerisation and simultaneous cross-linking of the polyphosphate glass. The role of alkaline elements in the lubrication mechanism is especially explained. This work firstly serves as a basis for a detailed study of alkaline polyphosphate tribofilm at temperature over 600 °C.
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13
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Biomineralization Patterns of Intracellular Carbonatogenesis in Cyanobacteria: Molecular Hypotheses. MINERALS 2016. [DOI: 10.3390/min6010010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Sharma V, Doerr N, Aswath PB. Chemical–mechanical properties of tribofilms and their relationship to ionic liquid chemistry. RSC Adv 2016. [DOI: 10.1039/c6ra01915c] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hardness as a function of indentation depth for tribofilms formed from ZDDP and N_DEHP ionic liquid. Superimposed on the data is the corresponding phosphate chain length information acquired from XANES.
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Affiliation(s)
- Vibhu Sharma
- Materials Science and Engineering Department
- The University of Texas at Arlington
- Arlington
- USA
| | | | - Pranesh B. Aswath
- Materials Science and Engineering Department
- The University of Texas at Arlington
- Arlington
- USA
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15
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Sharma V, Doerr N, Erdemir A, Aswath PB. Interaction of phosphonium ionic liquids with borate esters at tribological interfaces. RSC Adv 2016. [DOI: 10.1039/c6ra11822d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chemical make-up of the tribofilms formed using phosphonium-phosphate IL and borate ester.
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Affiliation(s)
- Vibhu Sharma
- Materials Science and Engineering Department University of Texas at Arlington
- Arlington
- USA
| | | | | | - Pranesh B. Aswath
- Materials Science and Engineering Department University of Texas at Arlington
- Arlington
- USA
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16
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Cini N, Ball V. Polyphosphates as inorganic polyelectrolytes interacting with oppositely charged ions, polymers and deposited on surfaces: fundamentals and applications. Adv Colloid Interface Sci 2014; 209:84-97. [PMID: 24529970 DOI: 10.1016/j.cis.2014.01.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/12/2014] [Accepted: 01/13/2014] [Indexed: 12/01/2022]
Abstract
Polyphosphates are important but neglected polyelectrolytes that play a major role in biology and in surface science for the stabilization of colloids against flocculation and for the preservation of food. They are also known as "Calgon" ® and intensively used as additives in washing powders. This review aims to review recent developments in which linear polyphosphates are used for the design of new functional coatings using sol-gel processes and layer-by-layer deposition methods. All these methods rely on the high charge density of polyphosphates as inorganic polyelectrolytes, therefore the structure and properties of these molecules are also reviewed. New perspectives will also been given for the design of stimuli responsive coatings at the tiny frontier between biology and materials science.
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Affiliation(s)
- N Cini
- Technical University of Istanbul, Faculty of Science and Letters, Department of Chemistry, 34469 Maslak Istanbul, Turkey
| | - V Ball
- Université de Strasbourg, Faculté de Chirurgie Dentaire, 1 Place de l'Hôpital, 67000 Strasbourg, France; Institut National de la santé et de la Recherche Médicale, Unité Mixte de Recherche 1121, 11 rue Humann, 67085 Strasbourg Cedex, France.
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17
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Xiong W, Peng J, Hu Y. Use of X-ray absorption near edge structure (XANES) to identify physisorption and chemisorption of phosphate onto ferrihydrite-modified diatomite. J Colloid Interface Sci 2012; 368:528-32. [DOI: 10.1016/j.jcis.2011.11.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2011] [Revised: 11/17/2011] [Accepted: 11/18/2011] [Indexed: 11/24/2022]
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18
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Demirkiran H, Hu Y, Zuin L, Appathurai N, Aswath PB. XANES analysis of calcium and sodium phosphates and silicates and hydroxyapatite–Bioglass®45S5 co-sintered bioceramics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2010.08.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Spectroscopic Detection of Tetracationic Porphyrin H-Aggregation on Polyanionic Matrix of Inorganic Polyphosphate. J Fluoresc 2010; 20:695-702. [DOI: 10.1007/s10895-010-0609-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Accepted: 02/07/2010] [Indexed: 10/19/2022]
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20
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Shakhvorostov D, Müser MH, Song Y, Norton PR. Smart materials behavior in phosphates: Role of hydroxyl groups and relevance to antiwear films. J Chem Phys 2009; 131:044704. [DOI: 10.1063/1.3182854] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Rouff AA, Rabe S, Nachtegaal M, Vogel F. X-ray Absorption Fine Structure Study of the Effect of Protonation on Disorder and Multiple Scattering in Phosphate Solutions and Solids. J Phys Chem A 2009; 113:6895-903. [DOI: 10.1021/jp811276t] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ashaki A. Rouff
- General Energy Research (ENE), Laboratory for Energy and Materials Cycles, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Stefan Rabe
- General Energy Research (ENE), Laboratory for Energy and Materials Cycles, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Maarten Nachtegaal
- General Energy Research (ENE), Laboratory for Energy and Materials Cycles, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Frédéric Vogel
- General Energy Research (ENE), Laboratory for Energy and Materials Cycles, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
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22
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Nicholls M, Najman MN, Zhang Z, Kasrai M, Norton PR, Gilbert PUPA. The contribution of XANES spectroscopy to tribology. CAN J CHEM 2007. [DOI: 10.1139/v07-093] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
X-ray absorption near edge structure spectroscopy (XANES) analysis has been routinely used to study the complex chemical interactions between additives in engine oil and metallic surfaces during high-temperature and pressure reciprocating wear conditions. XANES analysis provides detailed chemical and structural information on the resultant antiwear and tribo films formed on metallic surfaces. The following review will illustrate how XANES analysis on the macro scale can provide the information required to elucidate complex film formation mechanisms, then describes the use of emerging XANES spectromicroscopy to such systems, and concludes by showing the complementary nature of the macro and micro scale spatially resolved XANES analysis; Professor Bancroft has utilized the combination of these to stay at the forefront of XANES research in the field of tribology and in spectroscopy science in general.Key words: tribology, XANES, X-ray absorption near edge structure spectroscopy, metals, thiophosphates, spectromicroscopy, tribochemistry.
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Wan Y, Suominen Fuller M, Kasrai M, Bancroft G, Fyfe K, Torkelson J, Hu Y, Tan K. Effects of detergent on the chemistry of tribofilms from ZDDP: studied by X-ray absorption spectroscopy and XPS. BOUNDARY AND MIXED LUBRICATION - SCIENCE AND APPLICATIONS, PROCEEDINGS OF THE 28TH LEEDS-LYON SYMPOSIUM ON TRIBOLOGY 2002. [DOI: 10.1016/s0167-8922(02)80017-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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