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Pawar M, Annerino A, Shell J, Gouma PI. Photocatalytic Desulfurization of Thiophene with Chevrel Phase Ni 2Mo 6S 8 Synthesized by SHS. ACS OMEGA 2024; 9:33935-33940. [PMID: 39130553 PMCID: PMC11308010 DOI: 10.1021/acsomega.4c04213] [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: 05/02/2024] [Revised: 07/15/2024] [Accepted: 07/18/2024] [Indexed: 08/13/2024]
Abstract
The Chevrel phase compounds Cu4Mo6S8, Ni2Mo6S8, and Fe2Mo6S8, synthesized by self-propagating high temperature synthesis, were evaluated as photocatalysts for visible light photocatalytic desulfurization. Investigations began with reflectance measurements from which absorbance spectra were calculated using the Kubelka-Munk transformation. The absorbance data was then used to create Tauc plots to find the direct and indirect bandgaps of the Chevrel phase compounds. Bandgaps were found to be no more than the 1.74 eV for Ni2Mo6S8, so it was selected for further study because this bandgap suggests it will use the sun's emission spectrum better than the other materials studied here. Photocatalytic desulfurization experiments studied the concentration of thiophene mixed into n-octane with and without exposure to Ni2Mo6S8 with and without light exposure because of the relative difficulty of removing thiophenes from liquid fossil fuels by the industry standard hydrodesulfurization process. Ultraviolet-visible spectroscopy was used to analyze chemical changes in the thiophene-octane solution. Spectroscopic results demonstrate that the thiophene was effectively removed by exposure to Ni2Mo6S8 and visible light together but not by exposure to Ni2Mo6S8 or visible light alone. Multiple tests with the same Ni2Mo6S8 sample demonstrate that the material is reusable as a catalyst for photocatalytic desulfurization. The proposed mechanism results in the release of SO x species, which may be controlled and captured if separated from fossil fuels in bulk during industrial processing in contrast to their uncontrolled release as vehicle fuel exhaust. Controlled generation and collection of these species can allow for further processing into elemental sulfur in the same way that H2S released by standard hydrodesulfurization is processed into elemental S.
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Affiliation(s)
- Milind Pawar
- Department
of Materials Science and Engineering, The
Ohio State University, Columbus, Ohio 43210, United States
| | - Anthony Annerino
- Department
of Materials Science and Engineering, The
Ohio State University, Columbus, Ohio 43210, United States
| | - Jacob Shell
- Department
of Materials Science and Engineering, The
Ohio State University, Columbus, Ohio 43210, United States
| | - Pelagia-Irene Gouma
- Department
of Materials Science and Engineering, The
Ohio State University, Columbus, Ohio 43210, United States
- Department
of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio 43210, United States
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2
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Cheng S, Wu W, Li L, Su Y, Jin B, Li Y, Yu Z, Gu R. Synthesis of P-(NiCo)CO 3 /TiO 2 /Ti Self-Supported Electrode with High Catalytic Activity and Stability for Hydrogen Evolution. SMALL METHODS 2024:e2301771. [PMID: 38501826 DOI: 10.1002/smtd.202301771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/24/2024] [Indexed: 03/20/2024]
Abstract
Hydrogen is considered an ideal clean energy due to its high mass-energy density, and only water is generated after combustion. Water electrolysis is a sustainable method of obtaining a usable amount of pure hydrogen among the various hydrogen production methods. However, its development is still limited by applying expensive noble metal catalysts. Here, the dissolution-recrystallization process of TiO2 nanotube arrays in water with the hydrothermal reaction of a typical nickel-cobalt hydroxide synthesis process followed by phosphating to prepare a self-supported electrode with (NiCo)CO3 /TiO2 heterostructure named P-(NiCo)CO3 /TiO2 /Ti electrode is combined. The electrode exhibits an ultra-low overpotential of 31 mV at 10 mA cm-2 with a Tafel slope of 46.2 mV dec-1 in 1 m KOH and maintained its stability after running for 500 h in 1 m KOH. The excellent catalytic activity can be attributed to the structure of nanotube arrays with high specific surface area, superhydrophilicity, and super aerophobicity on the electrode surface. In addition, the uniform (NiCo)CO3 /TiO2 heterostructure also accelerates the electron transfer on the electrode surface. Finally, DFT calculations demonstrate that phosphating also improves the ΔGH* and ΔGH2O of the electrode. The synthesis strategy also promotes the exploration of catalysts for other necessary electrocatalytic fields.
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Affiliation(s)
- Shaoan Cheng
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Wei Wu
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Longxin Li
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yuqing Su
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Beichen Jin
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yangxi Li
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zhen Yu
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Ruonan Gu
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
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Wan K, Xiang Z, Liu W, Wei H, Fu Z, Liang Z. 过渡金属硫化物电解水析氢/析氧反应电催化剂研究进展. CHINESE SCIENCE BULLETIN-CHINESE 2022. [DOI: 10.1360/tb-2022-0174] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Liu H, Wang P, Jiang J, Cheng G, Wu T, Zhang Y. Construction of stable Mo xS y/CeO 2 heterostructures for the electrocatalytic hydrogen evolution reaction. Phys Chem Chem Phys 2022; 24:4891-4898. [PMID: 35137755 DOI: 10.1039/d1cp05466j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The unique structures of polynuclear MoxSy clusters make it possible to maximize the number of their active sites and for them to be good candidates for HER catalysts. An appropriate support is highly necessary not only to avoid the desorption of MoxSy clusters in a working environment, but also to improve their HER activity. Our work here shows that the CeO2 support could provide strong support for interaction with various MoxSy clusters and the formed MoxSy/CeO2 hetero-structures also have modest ΔGH* for the HER. The electronic features of MoxSy clusters are regulated by the CeO2 support, which leads to charge redistribution on edge atoms and plays a key role in H adsorption. Our studies provide instructive predictions on efficient candidates of molybdenum-sulfur based catalysts for the HER.
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Affiliation(s)
- Hongxian Liu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.
| | - Pai Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.
| | - Jinxiu Jiang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.
| | - Gang Cheng
- Institute of Energy Research, Jiangxi Academy of Sciences, Nanchang, P. R. China
| | - Tongwei Wu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.
| | - Yanning Zhang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.
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Singstock NR, Ortiz-Rodríguez JC, Perryman JT, Sutton C, Velázquez JM, Musgrave CB. Machine Learning Guided Synthesis of Multinary Chevrel Phase Chalcogenides. J Am Chem Soc 2021; 143:9113-9122. [PMID: 34107683 DOI: 10.1021/jacs.1c02971] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The Chevrel phase (CP) is a class of molybdenum chalcogenides that exhibit compelling properties for next-generation battery materials, electrocatalysts, and other energy applications. Despite their promise, CPs are underexplored, with only ∼100 compounds synthesized to date due to the challenge of identifying synthesizable phases. We present an interpretable machine-learned descriptor (Hδ) that rapidly and accurately estimates decomposition enthalpy (ΔHd) to assess CP stability. To develop Hδ, we first used density functional theory to compute ΔHd for 438 CP compositions. We then generated >560 000 descriptors with the new machine learning method SIFT, which provides an easy-to-use approach for developing accurate and interpretable chemical models. From a set of >200 000 compositions, we identified 48 501 CPs that Hδ predicts are synthesizable based on the criterion that ΔHd < 65 meV/atom, which was obtained as a statistical boundary from 67 experimentally synthesized CPs. The set of candidate CPs includes 2307 CP tellurides, an underexplored CP subset with a predicted preference for channel site occupation by cation intercalants that is rare among CPs. We successfully synthesized five of five novel CP tellurides attempted from this set and confirmed their preference for channel site occupation. Our joint computational and experimental approach for developing and validating screening tools that enable the rapid identification of synthesizable materials within a sparse class is likely transferable to other materials families to accelerate their discovery.
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Affiliation(s)
- Nicholas R Singstock
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303, United States
| | | | - Joseph T Perryman
- Department of Chemistry, University of California Davis, Davis, California 95616, United States
| | - Christopher Sutton
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Jesús M Velázquez
- Department of Chemistry, University of California Davis, Davis, California 95616, United States
| | - Charles B Musgrave
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303, United States.,Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80303, United States.,Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States
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Giuffredi G, Asset T, Liu Y, Atanassov P, Di Fonzo F. Transition Metal Chalcogenides as a Versatile and Tunable Platform for Catalytic CO 2 and N 2 Electroreduction. ACS MATERIALS AU 2021; 1:6-36. [PMID: 36855615 PMCID: PMC9888655 DOI: 10.1021/acsmaterialsau.1c00006] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Group VI transition metal chalcogenides are the subject of increasing research interest for various electrochemical applications such as low-temperature water electrolysis, batteries, and supercapacitors due to their high activity, chemical stability, and the strong correlation between structure and electrochemical properties. Particularly appealing is their utilization as electrocatalysts for the synthesis of energy vectors and value-added chemicals such as C-based chemicals from the CO2 reduction reaction (CO2R) or ammonia from the nitrogen fixation reaction (NRR). This review discusses the role of structural and electronic properties of transition metal chalcogenides in enhancing selectivity and activity toward these two key reduction reactions. First, we discuss the morphological and electronic structure of these compounds, outlining design strategies to control and fine-tune them. Then, we discuss the role of the active sites and the strategies developed to enhance the activity of transition metal chalcogenide-based catalysts in the framework of CO2R and NRR against the parasitic hydrogen evolution reaction (HER); leveraging on the design rules applied for HER applications, we discuss their future perspective for the applications in CO2R and NRR. For these two reactions, we comprehensively review recent progress in unveiling reaction mechanisms at different sites and the most effective strategies for fabricating catalysts that, by exploiting the structural and electronic peculiarities of transition metal chalcogenides, can outperform many metallic compounds. Transition metal chalcogenides outperform state-of-the-art catalysts for CO2 to CO reduction in ionic liquids due to the favorable CO2 adsorption on the metal edge sites, whereas the basal sites, due to their conformation, represent an appealing design space for reduction of CO2 to complex carbon products. For the NRR instead, the resemblance of transition metal chalcogenides to the active centers of nitrogenase enzymes represents a powerful nature-mimicking approach for the design of catalysts with enhanced performance, although strategies to hinder the HER must be integrated in the catalytic architecture.
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Affiliation(s)
- Giorgio Giuffredi
- Center
for Nano Science and Technology, Istituto
Italiano di Tecnologia (IIT@Polimi), Via Pascoli 70/3, 20133 Milano, Italy,Department
of Energy, Politecnico di Milano, Via Lambruschini 4, 20156 Milano, Italy
| | - Tristan Asset
- Department
of Chemical & Biomolecular Engineering and National Fuel Cell
Research Center, University of California, Irvine, California 92697-2580, United States
| | - Yuanchao Liu
- Department
of Chemical & Biomolecular Engineering and National Fuel Cell
Research Center, University of California, Irvine, California 92697-2580, United States
| | - Plamen Atanassov
- Department
of Chemical & Biomolecular Engineering and National Fuel Cell
Research Center, University of California, Irvine, California 92697-2580, United States
| | - Fabio Di Fonzo
- Center
for Nano Science and Technology, Istituto
Italiano di Tecnologia (IIT@Polimi), Via Pascoli 70/3, 20133 Milano, Italy,
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Ortiz-Rodríguez JC, Singstock NR, Perryman JT, Hyler FP, Jones SJ, Holder AM, Musgrave CB, Velázquez JM. Stabilizing Hydrogen Adsorption through Theory-Guided Chalcogen Substitution in Chevrel-Phase Mo 6X 8 (X=S, Se, Te) Electrocatalysts. ACS APPLIED MATERIALS & INTERFACES 2020; 12:35995-36003. [PMID: 32667188 DOI: 10.1021/acsami.0c07207] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work, we implement a facile microwave-assisted synthesis method to yield three binary Chevrel-Phase chalcogenides (Mo6X8; X = S, Se, Te) and investigate the effect of increasing chalcogen electronegativity on hydrogen evolution catalytic activity. Density functional theory predictions indicate that increasing chalcogen electronegativity in these materials will yield a favorable electronic structure for proton reduction. This is confirmed experimentally via X-ray absorption spectroscopy as well as traditional electrochemical analysis. We have identified that increasing the electronegativity of X in Mo6X8 increases the hydrogen adsorption strength owing to a favorable shift in the p-band position as well as an increase in the Lewis basicity of the chalcogen, thereby improving hydrogen evolution reaction energetics. We find that Mo6S8 exhibits the highest hydrogen evolution activity of the Mo6X8 series of catalysts, requiring an overpotential of 321 mV to achieve a current density of 10 mA cm-2ECSA, a Tafel slope of 74 mV per decade, and an exchange current density of 6.01 × 10-4 mA cm-2ECSA. Agreement between theory and experiment in this work indicates that the compositionally tunable Chevrel-Phase chalcogenide family is a promising framework for which electronic structure can be predictably modified to improve catalytic small-molecule reduction reactivity.
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Affiliation(s)
- Jessica C Ortiz-Rodríguez
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
| | - Nicholas R Singstock
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Joseph T Perryman
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
| | - Forrest P Hyler
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
| | - Sarah J Jones
- Department of Chemistry, Pomona College, 645 North College Avenue, Claremont, California 91711-6338, United States
| | - Aaron M Holder
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Charles B Musgrave
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
- Department of Chemistry, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Jesús M Velázquez
- Department of Chemistry, University of California Davis, One Shields Avenue, Davis, California 95616, United States
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Kim EB, Abdullah, Ameen S, Akhtar MS, Shin HS. Environment-friendly and highly sensitive dichloromethane chemical sensor fabricated with ZnO nanopyramids-modified electrode. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.05.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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