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Strzelecki AC, Cockreham CB, Parker SS, Mann SC, Lhermitte C, Wu D, Guo X, Monreal M, Jackson JM, Mitchell J, Boukhalfa H, Xu H. A new methodology for measuring the enthalpies of mixing and heat capacities of molten chloride salts using high temperature drop calorimetry. Rev Sci Instrum 2024; 95:014103. [PMID: 38236299 DOI: 10.1063/5.0144910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 12/12/2023] [Indexed: 01/19/2024]
Abstract
Molten salt reactors (MSRs) are a promising alternative to conventional nuclear reactors as they may offer more efficient fuel utilization, lower waste generation, and improved safety. The state of knowledge of the properties of liquid salts is far from complete. In order to develop the MSR concept, it is essential to develop a fundamental understanding of the thermodynamic properties, including the heat capacities (Cp) and enthalpies of mixing (ΔHmix), of molten salts at MSR operating conditions. Historically, the Cp values of molten salts were determined by drop-calorimetry or differential scanning calorimetry, whereas their ΔHmix values were typically measured using specialized high temperature calorimeters. In this work, a new methodology for measuring both the Cp and the ΔHmix of molten chloride salts was developed. This novel method involves sealing a chloride salt sample in a nickel capsule and performing conventional transposed temperature drop calorimetry using a commercially available Setaram AlexSYS-800 Tian-Calvet twin microcalorimeter. This methodology may be applied to calorimetric measurements of more complex salt mixtures, especially mixtures containing actinides and fission products.
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Affiliation(s)
- Andrew C Strzelecki
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, USA
- Materials Science and Engineering Program, Washington State University, Pullman, Washington 99164, USA
- Department of Chemistry, Washington State University, Pullman, Washington 99164, USA
| | - Cody B Cockreham
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, USA
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, USA
| | - S Scott Parker
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Shane C Mann
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Charles Lhermitte
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Di Wu
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, USA
- Materials Science and Engineering Program, Washington State University, Pullman, Washington 99164, USA
- Department of Chemistry, Washington State University, Pullman, Washington 99164, USA
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, USA
| | - Xiaofeng Guo
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, USA
- Materials Science and Engineering Program, Washington State University, Pullman, Washington 99164, USA
- Department of Chemistry, Washington State University, Pullman, Washington 99164, USA
| | - Marisa Monreal
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J Matt Jackson
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Jeremy Mitchell
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Hakim Boukhalfa
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Hongwu Xu
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
- School of Molecular Sciences and Center for Materials of the Universe, Arizona State University, Tempe, Arizona 85287, USA
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2
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Cockreham CB, Goncharov VG, Hammond-Pereira E, Reece ME, Strzelecki AC, Xu W, Saunders SR, Xu H, Guo X, Wu D. Energetic Stability and Interfacial Complexity of Ti 3C 2T x MXenes Synthesized with HF/HCl and CoF 2/HCl as Etching Agents. ACS Appl Mater Interfaces 2022; 14:41542-41554. [PMID: 36040849 DOI: 10.1021/acsami.2c09669] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
MXenes are ultra-thin two-dimensional layered early transition-metal carbides and nitrides with potential applications in various emerging technologies, such as energy storage, water purification, and catalysis. MXenes are synthesized from the parent MAX phases with different etching agents [hydrofluoric acid (HF) or fluoride salts with a strong acid] by selectively removing a more weakly bound crystalline layer of Al or Ga replaced by surface groups (-O, -F, -OH, etc.). Ti3C2Tx MXene synthesized by CoF2/HCl etching has layered heterogeneity due to intercalated Al3+ and Co2+ that act as pillars for interlayer spacings. This study investigates the impacts of etching environments on the compositional, interfacial, structural, and thermodynamic properties of Ti3C2Tx MXenes. Specifically, compared with HF/HCl etching, CoF2/HCl treatment leads to a Ti3C2Tx MXene with a broader distribution of interlayer distances, increased number of intercalated cations, and decreased degree of hydration. Moreover, we determine the enthalpies of formation at 25 °C (ΔHf,25°C) of Ti3C2Tx MXenes etched with CoF2/HCl, ΔHf,25°C = -1891.7 ± 35.7 kJ/mol Ti3C2, and etched with HF/HCl, ΔHf,25°C = -1978.2 ± 35.7 kJ/mol Ti3C2, using high-temperature oxidation drop calorimetry. These energetic data are discussed and compared with experimentally derived and computationally predicted values to elucidate the effects of intercalants and surface groups of MXenes. We find that MXenes with intercalated metal cations have a less exothermic ΔHf,25°C from an increase in the interlayer space and dimension heterogeneity and a decrease in the degree of hydration leading to reduced layer-layer van der Waals interactions and weakened hydration effects applied on the MXene layers. The outcomes of this study further our understanding of MXene's energetic-structural-interfacial property relationships.
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Affiliation(s)
- Cody B Cockreham
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, New Mexico, New Mexico 87545, United States
| | - Vitaliy G Goncharov
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, New Mexico, New Mexico 87545, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Ellis Hammond-Pereira
- Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Margaret E Reece
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Andrew C Strzelecki
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, New Mexico, New Mexico 87545, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Wenqian Xu
- X-ray Science Division, Argonne National Laboratory, Advanced Photon Source, Lemont, Illinois 60438, United States
| | - Steven R Saunders
- Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- School of Food Science, Washington State University, Pullman, Washington 99164, United States
| | - Hongwu Xu
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, New Mexico, New Mexico 87545, United States
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85281, United States
| | - Xiaofeng Guo
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Di Wu
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99164, United States
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3
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Cockreham CB, Zhang X, Eakin JA, Dewa M, Li H, Li N, Sun J, Ha S, Ivory CF, Wang Y, Xu H, Wu D. Unveiling the Interfacial and Structural Heterogeneity of Ti 3C 2T x MXene Etched with CoF 2/HCl by Integrated in Situ Thermal Analysis. ACS Appl Mater Interfaces 2021; 13:52125-52133. [PMID: 34387989 DOI: 10.1021/acsami.1c10021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
Ti3C2Tx MXene is a member of the recently discovered two-dimensional early transition metal carbide and nitride family of MXenes with potential applications in energy storage and heterogeneous catalysis at elevated temperatures. Here, we apply a suite of in situ techniques to probe Ti3C2Tx MXene's thermal evolutions, including in situ X-ray diffraction (XRD), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and integrated thermogravimetry-differential scanning calorimetry-mass spectrometry (TG-DSC-MS). In light of this set of in situ investigations, we find heterogeneity in the layering of Ti3C2Tx MXene revealed only at higher temperatures. Our findings present behavior up to 600 °C, particularly interlayer water and -OH surface end-capping groups. In one group of layers, their interlayer spacing shrinks as water deintercalates, but the other group of layers unexpectedly shows no change in the interlayer spacing. This is strong evidence that intercalants act as guest pillaring agents in the latter layering group, which stabilize these layers at higher temperatures while keeping the interlayer space accessible.
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Affiliation(s)
- Cody B Cockreham
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Xianghui Zhang
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Jeffrey A Eakin
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Martinus Dewa
- School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Houqian Li
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Nan Li
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Junming Sun
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Su Ha
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Cornelius F Ivory
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Yong Wang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Hongwu Xu
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Di Wu
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99164, United States
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4
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Zhang X, Strzelecki AC, Cockreham CB, Goncharov VG, Li H, Sun J, Sun H, Guo X, Xu H, Su H, Wang B, Wang Y, Wu D. Thermodynamics of molybdenum trioxide encapsulated in zeolite Y. AIChE J 2021. [DOI: 10.1002/aic.17464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xianghui Zhang
- Alexandra Navrotsky Institute for Experimental Thermodynamics Washington State University Pullman Washington USA
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman Washington USA
| | - Andrew C. Strzelecki
- Alexandra Navrotsky Institute for Experimental Thermodynamics Washington State University Pullman Washington USA
- Department of Chemistry Washington State University Pullman Washington USA
- Materials Science and Engineering Washington State University Pullman Washington USA
| | - Cody B. Cockreham
- Alexandra Navrotsky Institute for Experimental Thermodynamics Washington State University Pullman Washington USA
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman Washington USA
- Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos New Mexico USA
| | - Vitaliy G. Goncharov
- Alexandra Navrotsky Institute for Experimental Thermodynamics Washington State University Pullman Washington USA
- Department of Chemistry Washington State University Pullman Washington USA
- Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos New Mexico USA
| | - Houqian Li
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman Washington USA
| | - Junming Sun
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman Washington USA
| | - Hui Sun
- Petroleum Processing Research Center East China University of Science and Technology Shanghai China
- International Joint Research Center of Green Energy Chemical Engineering East China University of Science and Technology Shanghai China
| | - Xiaofeng Guo
- Alexandra Navrotsky Institute for Experimental Thermodynamics Washington State University Pullman Washington USA
- Department of Chemistry Washington State University Pullman Washington USA
- Materials Science and Engineering Washington State University Pullman Washington USA
| | - Hongwu Xu
- Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos New Mexico USA
| | - Ha Su
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman Washington USA
| | - Baodong Wang
- National Institute of Clean‐and‐Low‐Carbon Energy Beijing China
| | - Yong Wang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman Washington USA
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland Washington USA
| | - Di Wu
- Alexandra Navrotsky Institute for Experimental Thermodynamics Washington State University Pullman Washington USA
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman Washington USA
- Department of Chemistry Washington State University Pullman Washington USA
- Materials Science and Engineering Washington State University Pullman Washington USA
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5
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Zhang X, Reece ME, Cockreham CB, Sun H, Wang B, Xu H, Sun J, Guo X, Su H, Wang Y, Wu D. Formation Energetics and Guest—Host Interactions of Molybdenum Carbide Confined in Zeolite Y. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02822] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xianghui Zhang
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Margaret E. Reece
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99163, United States
| | - Cody B. Cockreham
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Hui Sun
- Petroleum Processing Research Center, East China University of Science and Technology, Shanghai 200237, China
- International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Baodong Wang
- National Institute of Clean-and-Low-Carbon Energy, Beijing, 102211, China
| | - Hongwu Xu
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Junming Sun
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Xiaofeng Guo
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99163, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99163, United States
| | - Ha Su
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Yong Wang
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99163, United States
| | - Di Wu
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99163, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99163, United States
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6
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Stowell CET, Li X, Matsunaga MH, Cockreham CB, Kelly KM, Cheetham J, Tzeng E, Wang Y. Resorbable vascular grafts show rapid cellularization and degradation in the ovine carotid. J Tissue Eng Regen Med 2020; 14:1673-1684. [PMID: 32893492 DOI: 10.1002/term.3128] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/12/2020] [Accepted: 08/24/2020] [Indexed: 01/09/2023]
Abstract
Small-diameter vascular grafts perform poorly as arterial bypasses. We developed a cell-free, resorbable graft intended to remodel in situ into a living vessel. The graft consisted of a soft electrospun poly(glycerol sebacate) (PGS) core, a PGS prepolymer (pPGS) coating, and a reinforcing electrospun poly(ε-caprolactone) (PCL) sheath. The core contained 4.37 ± 1.95 μm fibers and had a porosity of 66.4 ± 3.2%, giving it large pores to encourage cellular infiltration and pro-healing macrophages. The sheath contained 6.63 ± 0.89 μm fibers and had a porosity of 80.5 ± 2.1%. in vitro testing suggested that the stress achieved at arterial pressure would be 13-fold lower than the yield stress of the graft. Grafts were implanted as 7 cm carotid interpositions in two sheep. Sheep were maintained on dual antiplatelet therapy and followed with duplex ultrasound. One graft ruptured at 13 days. The second animal was euthanized with a dilated graft at 15 days. Histology showed near-total degradation of the core and a robust inflammatory response within the sheath. Little neotissue had formed within the graft wall or lumen, but the graft had become surrounded by fibroblast-rich and vascularized connective tissue. Because PCL is commonly used in resorbable grafts, this mechanical destabilization was unexpected. We speculate that the inflammatory response instigated by the rapidly degrading PGS intensified degradation of the PCL and that the large pores enabled a prolonged acute host-graft reaction which attacked the entire bulk of the material, speeding weakening. Future work will focus on how to moderate inflammation and improve remodeling of grafts in large animals.
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Affiliation(s)
- Chelsea E T Stowell
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Xiyao Li
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Madilyn H Matsunaga
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Cody B Cockreham
- Department of Chemical and Materials Engineering, New Mexico State University, Las Cruces, NM, USA
| | - Kathleen M Kelly
- Department of Biomedical Sciences, Cornell University, Ithaca, NY, USA
| | - Jonathan Cheetham
- Department of Clinical Sciences, Cornell University, Ithaca, NY, USA
| | - Edith Tzeng
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA.,Surgery Service, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
| | - Yadong Wang
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
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7
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Zhang X, Cockreham CB, Huang Z, Sun H, Yang C, Marin-Flores OG, Wang B, Guo X, Ha S, Xu H, Wu D. Thermodynamics of Water-Cationic Species-Framework Guest-Host Interactions within Transition Metal Ion-Exchanged Mordenite Relevant to Selective Anaerobic Oxidation of Methane to Methanol. J Phys Chem Lett 2020; 11:4774-4784. [PMID: 32452684 DOI: 10.1021/acs.jpclett.0c01331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Low-temperature anaerobic methane conversion to methanol (MTM) using copper ion-exchanged mordenite (Cu-MOR) as the catalyst and water as the sole source of oxygen is promising for sustainable utilization of methane. Integrating in situ calorimetric, spectroscopic, and structural methodologies, we report a systematic study on energetics of water-cationic species-framework guest-host interactions as a function of water loading for several mordenites relevant to low-temperature MTM. Notably, the near-zero coverage hydration enthalpy on Cu-MOR is -133.1 ± 6.0 kJ/mol water, which is related to Cu-MOR regeneration using water as oxidant. The copper oxo sites are thermally stable up to 915 °C and remain chemically intact as an oxygen source after complete hydration and dehydration. This study underscores the importance of manipulating the oxidation state and coordination chemistry of transition metal guest species in zeolites by fine-tuning the partial pressure of water as a strategy for rational design, synthesis, and modification of catalysts.
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Affiliation(s)
- Xianghui Zhang
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Cody B Cockreham
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Zhiyang Huang
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Hui Sun
- Petroleum Processing Research Center, East China University of Science and Technology, Shanghai 200237, China
- International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chen Yang
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Oscar G Marin-Flores
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Baodong Wang
- National Institute of Clean-and-Low-Carbon Energy, Beijing 102211, China
| | - Xiaofeng Guo
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99163, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99163, United States
| | - Su Ha
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Hongwu Xu
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Di Wu
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99163, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99163, United States
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8
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Zhang X, Cockreham CB, Yılmaz E, Li G, Li N, Ha S, Fu L, Qi J, Xu H, Wu D. Energetic Cost for Being "Redox-Site-Rich" in Pseudocapacitive Energy Storage with Nickel-Aluminum Layered Double Hydroxide Materials. J Phys Chem Lett 2020; 11:3745-3753. [PMID: 32320246 DOI: 10.1021/acs.jpclett.0c00865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Defining the energetic landscape of pseudocapacitive materials such as transition metal layered double hydroxides (LDHs) upon redox-site enrichment is essential to harnessing their power for effective energy storage. Here, coupling acid solution calorimetry, in situ XRD, and in situ DRIFTS, we demonstrate that as the Ni/Al ratio increases, both as-made (hydrated) and dehydrated NiAl-LDH samples are less stable as evidenced by their enthalpies of formation. Moreover, the higher specific capacity at an intermediate Ni/Al ratio of 3 is enabled by effective water-LDH interactions, which energetically stabilize the excessive near-surface Ni redox sites, solvate intercalated carbonate ions, and fill the expanded vdW gap, paying for the "energetic cost" of being "redox-site-rich". Thus, from a thermodynamic perspective, engineering molecule/solid-LDH interactions on the nanoscale with confined guest species other than water, which energetically impose stronger stabilization, may help us to achieve their specific capacitance potential.
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Affiliation(s)
- Xianghui Zhang
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Cody B Cockreham
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Esra Yılmaz
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
- Department of Chemical Engineering, Ege University, Izumir 35100, Turkey
| | - Gengnan Li
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Nan Li
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Su Ha
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
| | - Liangjie Fu
- Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Jianqi Qi
- College of Physics, Sichuan University, Chengdu 610064, China
| | - Hongwu Xu
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Di Wu
- Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99163, United States
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99163, United States
- Materials Science and Engineering, Washington State University, Pullman, Washington 99163, United States
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