1
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Ke Y, Fan Z, Mao J. In situ confined encapsulation of ultrafine Fe 2O 3 nanoclusters in N/S co-doped graphene-based membranes for continuous chemical conversion. RSC Adv 2024; 14:29464-29471. [PMID: 39297047 PMCID: PMC11409228 DOI: 10.1039/d4ra05273k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2024] [Accepted: 09/10/2024] [Indexed: 09/21/2024] Open
Abstract
Membranes with catalytic function can provide an effective approach for simultaneously transforming reactants to industrial chemicals and separation. However, rational design of stable and high-quality catalytic membranes with controlled structure remains a big challenge. We report a strategy for in situ confined encapsulation of ultrafine Fe2O3 nanoclusters in nitrogen and sulfur co-doped graphene-based membranes for continuous chemical conversion. By manipulation of the active ferric catalytic center and surrounding coordination atoms in doped rGO nanosheets, multiple coordination structures were provided to achieve improved catalytic properties. Angstrom-level confined interlayer structure (∼8 Å) was constructed by external pressurization of Fe/NS-rGO nanosheets on membrane substrate, and the adsorption energy of 4-nitrophenol (4-NP) molecule between Fe/NS-rGO layers was much stronger than that in traditional nanometer-level confined space due to extra interactions, achieving the catalytic efficiency with a high Turnover Frequency (TOF) value (1596.0 h-1). The prepared ultrathin Fe/NS-rGO catalytic membrane also exhibited excellent water flux and rejection rate for small dye molecules, as well as long-term separation activity toward naphthol green B (NgB) for at least 130 h. The progress offers a viable route to the rational design of high-quality catalytic membranes with tailored structures and properties for wide applications.
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Affiliation(s)
- Yude Ke
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology Hangzhou 310014 China
| | - Zixuan Fan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University Guangzhou 510000 P. R. China
| | - Jingwen Mao
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology Hangzhou 310014 China
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2
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Wang J, Li R, Zhang G, Dong C, Fan Y, Yang S, Chen M, Guo X, Mu R, Ning Y, Li M, Fu Q, Bao X. Confinement-Induced Indium Oxide Nanolayers Formed on Oxide Support for Enhanced CO 2 Hydrogenation Reaction. J Am Chem Soc 2024; 146:5523-5531. [PMID: 38367215 DOI: 10.1021/jacs.3c13355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2024]
Abstract
An enclosed nanospace often shows a significant confinement effect on chemistry within its inner cavity, while whether an open space can have this effect remains elusive. Here, we show that the open surface of TiO2 creates a confined environment for In2O3 which drives spontaneous transformation of free In2O3 nanoparticles in physical contact with TiO2 nanoparticles into In oxide (InOx) nanolayers covering onto the TiO2 surface during CO2 hydrogenation to CO. The formed InOx nanolayers are easy to create surface oxygen vacancies but are against over-reduction to metallic In in the H2-rich atmospheres, which thus show significantly enhanced activity and stability in comparison with the pure In2O3 catalyst. The formation of interfacial In-O-Ti bonding is identified to drive the In2O3 dispersion and stabilize the metastable InOx layers. The InOx overlayers with distinct chemistry from their free counterpart can be confined on various oxide surfaces, demonstrating the important confinement effect at oxide/oxide interfaces.
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Affiliation(s)
- Jianyang Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Rongtan Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Guanghui Zhang
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Cui Dong
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yamei Fan
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Shuangli Yang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
| | - Mingshu Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
| | - Xinwen Guo
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Rentao Mu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yanxiao Ning
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Mingrun Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Qiang Fu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xinhe Bao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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3
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Zhang X, Tang J, Wang L, Wang C, Chen L, Chen X, Qian J, Pan B. Nanoconfinement-triggered oligomerization pathway for efficient removal of phenolic pollutants via a Fenton-like reaction. Nat Commun 2024; 15:917. [PMID: 38296948 PMCID: PMC10831074 DOI: 10.1038/s41467-024-45106-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 01/15/2024] [Indexed: 02/02/2024] Open
Abstract
Heterogeneous Fenton reaction represents one of the most reliable technologies to ensure water safety, but is currently challenged by the sluggish Fe(III) reduction, excessive input of chemicals for organic mineralization, and undesirable carbon emission. Current endeavors to improve the catalytic performance of Fenton reaction are mostly focused on how to accelerate Fe(III) reduction, while the pollutant degradation step is habitually overlooked. Here, we report a nanoconfinement strategy by using graphene aerogel (GA) to support UiO-66-NH2-(Zr) binding atomic Fe(III), which alters the carbon transfer route during phenol removal from kinetically favored ring-opening route to thermodynamically favored oligomerization route. GA nanoconfinement favors the Fe(III) reduction by enriching the reductive intermediates and allows much faster phenol removal than the unconfined analog (by 208 times in terms of first-order rate constant) and highly efficient removal of total organic carbon, i.e., 92.2 ± 3.7% versus 3.6 ± 0.3% in 60 min. Moreover, this oligomerization route reduces the oxidant consumption for phenol removal by more than 95% and carbon emission by 77.9%, compared to the mineralization route in homogeneous Fe2++H2O2 system. Our findings may upgrade the regulatory toolkit for Fenton reactions and provide an alternative carbon transfer route for the removal of aqueous pollutants.
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Affiliation(s)
- Xiang Zhang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Jingjing Tang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Lingling Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Chuan Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Lei Chen
- Research Center for Environmental Nanotechnology (ReCENT), State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Nanjing, 210023, China
| | - Xinqing Chen
- CAS key Laboratory of Low-carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China
| | - Jieshu Qian
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
- Research Center for Environmental Nanotechnology (ReCENT), State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Nanjing, 210023, China.
- School of Environmental Engineering, Wuxi University, Jiangsu, 214105, P. R. China.
| | - Bingcai Pan
- Research Center for Environmental Nanotechnology (ReCENT), State Key Laboratory of Pollution Control and Resources Reuse, School of Environment, Nanjing University, Nanjing, 210023, China.
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4
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Du M, Cui L, Wang P, Niu C, Kang YS, Zhang XL. Synergistic material modification-induced optimization of interfacial charge transfer and surface hydrogen adsorption. NANOSCALE 2023; 15:15352-15357. [PMID: 37703064 DOI: 10.1039/d3nr03477a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
Being chemically stable, low cost and made from abundant resources, titanium dioxide (TiO2) possesses the most desired advantages for photocatalytic applications. However, the intrinsic limits of high surface hydrogen adsorption energy, wide band gap, low separation rate and rapid recombination of the photogenerated charge carriers greatly hamper its utilization. To address these issues, the present work combines density functional theory (DFT) calculations with rational modifications of TiO2 with nickel doping and an ultra-thin shield of fluorinated carbon (FNT) for application in the photocatalytic hydrogen evolution reaction (HER). Comprehensive studies imply that the synergistic modifications not only optimize the surface H adsorption, but also facilitate the interfacial charge transfer and simultaneously prevent the photochemical and chemical corrosion of the catalysts. In good agreement with the theoretical predictions, the resulting FNT photocatalysts demonstrate an optimal HER efficiency of 13.0 mmol g-1 h-1, nearly 33-times and over three-times beyond that of the pristine TiO2 (0.4 mmol g-1 h-1) and the Ni-doped TiO2 (4.2 mmol g-1 h-1), respectively. Moreover, the composite also exhibits excellent stability with a well-reproducible HER performance over a 66-hour cyclic HER test of 15 cycles.
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Affiliation(s)
- Mingyan Du
- School of Materials Science and Engineering, Zhengzhou University, 450001, P.R. China.
| | - Lingling Cui
- School of Materials Science and Engineering, Zhengzhou University, 450001, P.R. China.
| | - Panpan Wang
- School of Physics and Microelectronics, Zhengzhou University, 450001, P.R. China
| | - Chunyao Niu
- School of Physics and Microelectronics, Zhengzhou University, 450001, P.R. China
| | - Young Soo Kang
- Environmental and Climate Technology, Korea Institute of Energy Technology (KENTECH), 200 Hyeoksin-ro, Naju City, Jeollanamdo 58330, Korea
| | - Xiao Li Zhang
- School of Materials Science and Engineering, Zhengzhou University, 450001, P.R. China.
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5
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Zhou C, Sui M, Du S. Insights into the electron activation mechanisms at the micro level by nano zero-valent iron supported by molybdenum disulfide (nZVI@MD) from preparation to application. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131968. [PMID: 37429190 DOI: 10.1016/j.jhazmat.2023.131968] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/14/2023] [Accepted: 06/28/2023] [Indexed: 07/12/2023]
Abstract
Both molybdenum disulfide (MoS2) and nano zero-valent iron (nZVI) exhibit excellent adsorption abilities. However, the constrained conductivity of MoS2 and the lack of selectivity of nZVI for electron transfer still pose challenges. In this study, we designed a series of novel nano zero-valent iron supported by molybdenum disulfide composites (nZVI@MD) with multiple electron-rich active sites, including iron dopant replacement, iron atom intercalation and exposed Mo4+, for effective removal of Cr(VI). Results showed that preparation temperature and the amount of MoS2 added were identified as the two most significant factors affecting the reduction properties of nZVI@MD. Systematic experiments revealed that the nZVI@MD exhibited good anti-interference performance, stability and reusability due to its excellent electron selectivity. Characterization results exhibited that iron atoms replaced the sulfur vacancies in MoS2 and inserted into an intercalation of MoS2 during the preparation process. The mechanisms underlying the uptake of Cr(VI) by nZVI@MD can be proposed as follows: (i) electrostatic interactions, (ii) reduction reaction, and (iii) co-precipitation involving Fe-O-Cr. Furthermore, nZVI@MD exhibited excellent electron activity, hydrophilicity and oxidation resistance, confirmed by density functional theory (DFT) calculations. This work provided new strategies and mechanistic insights for the rational design of adsorbents.
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Affiliation(s)
- Chundi Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, People's Republic of China
| | - Minghao Sui
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, People's Republic of China.
| | - Songhang Du
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, People's Republic of China
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6
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Zhang L, Wang Y, Peng L, Chen Z, Lyu S, Wang S. Self-Luminous Wood Coatings with Carbon Dots/TiO 2 Grafted Afterglow SrAl 2O 4: Eu, Dy Core-Shell Phosphors for Long-Lasting Formaldehyde Removal. Polymers (Basel) 2023; 15:polym15092077. [PMID: 37177222 PMCID: PMC10180872 DOI: 10.3390/polym15092077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/14/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
Long-term relief of indoor volatile pollution has become a competitive issue worldwide in both visible and dark environments. A novel self-luminous wood coating with carbon dots (CDs)/titanium dioxide (TiO2) nanomaterial coated SrAl2O4: Eu2+, Dy3+ (CDs/TiO2@SAO) composite was prepared for the long-term degradation of formaldehyde through a simple sol-gel method. The microstructure, chemical composition, ultraviolet-visible (UV-vis) spectra, and long-lasting fluorescence of the CDs/TiO2@SAO photocatalyst were analyzed to illustrate the mechanism for degrading formaldehyde. The obtained CDs with a particle size of ~2-7 nm have a good graphite structure and presented good absorption in visible light. In addition, owing to the synergistic effect of the CDs/TiO2 nanomaterial coating layer and the long-afterglow luminescence of the SAO phosphor, the CDs/TiO2@SAO composite can absorb a part of the visible light for photocatalytic degradation and store luminous energy efficiently at daytime so as to give out visible luminescence continuously for a few hours in the darkness. Furthermore, the functional wood coatings with CDs/TiO2@SAO composite presented continuous and efficient photocatalytic activity in the presence and absence of light exposure. The current research could provide a new strategy for designing an efficient photocatalyst for degrading formaldehyde pollution in the daytime with a visible light supply and in an indoor dark environment without an external light source.
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Affiliation(s)
- Longfei Zhang
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
- National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, Fuzhou 350002, China
| | - Ying Wang
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
| | - Limin Peng
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
| | - Zhilin Chen
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
| | - Shaoyi Lyu
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
- National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, Fuzhou 350002, China
| | - Siqun Wang
- Center for Renewable Carbon, University of Tennessee, Knoxville, TN 37996, USA
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7
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Feng P, Zhang D, Zhang P, Wang Y, Gan Y. Nanoscale characterization of the heterogeneous interfacial oxidation layer of graphene/Cu based on a SEM electron beam induced reduction effect. Phys Chem Chem Phys 2023; 25:8816-8825. [PMID: 36916298 DOI: 10.1039/d2cp05809j] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
Characterization of the interfacial oxidation layer of graphene/metal is a challenging task using conventional spectroscopy techniques because interfacial oxidation is heterogeneous at the nanoscale underneath the graphene. Here we developed a feasible method for nanoscale characterization of the interfacial oxidation layer of graphene/Cu (Gr/Cu) based on scanning electron microscopy (SEM) electron beam irradiation (EBI) induced reduction of interfacial oxides (SEM EBI-RIO method) at room temperature. The change in the thickness and coverage of the interfacial Cu oxide layer induced by EBI is responsible for the observed contrast reversal or change in SEM images of a targeted area with a width down to 200 nm in the EBI time scale of seconds to minutes. This method offers the capability of mapping heterogeneous interfacial oxidation of Gr/Cu with sub-100 nm spatial resolution and determining the range of thickness (1-5 nm) of the interfacial oxide layer. The SEM EBI-RIO method will be a powerful method to complement X-ray photoelectron spectroscopy (XPS), Raman microscopy, and high resolution transmission electron microscopy (HRTEM) for characterization of the interfacial oxidation layer of 2D materials and devices.
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Affiliation(s)
- Panpan Feng
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Dan Zhang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Peng Zhang
- Manufacturing Engineering for Aviation and Aerospace, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - You Wang
- Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin 150001, P. R. China
- Materials Physics and Chemistry Department, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Yang Gan
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China
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8
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Tiwari N, Hariharan S, Tiwari AK. Effect of temperature on CO oxidation over Pt(111) in two-dimensional confinement. J Chem Phys 2022; 157:144701. [PMID: 36243534 DOI: 10.1063/5.0116783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Confined catalysis between a two-dimensional (2D) cover and metal surfaces has provided a unique environment with enhanced activity compared to uncovered metal surfaces. Within this 2D confinement, weakened adsorption and lowered activation energies were observed using surface science experiments and density functional theory (DFT) calculations. Computationally, the role of electronic and mechanical factors responsible for the improved activity was deduced only from static DFT calculations. This demands a detailed investigation on the dynamics of reactions under 2D confinement, including temperature effects. In this work, we study CO oxidation on a 2D graphene covered Pt(111) surface at 90 and 593 K using DFT-based ab initio molecular dynamics simulations starting from the transition state configuration. We show that CO oxidation in the presence of a graphene cover is substantially enhanced (2.3 times) at 90 K. Our findings suggest that 2D confined spaces can be used to enhance the activity of chemical reactions, especially at low temperatures.
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Affiliation(s)
- Nidhi Tiwari
- Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Seenivasan Hariharan
- Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Ashwani K Tiwari
- Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
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9
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Majumder M, Tiwari AK. Oxygen-Induced Dissociation of a Single Water Molecule in Confined 2-D Layers: A Semiempirical study. Chemphyschem 2022; 23:e202200242. [PMID: 35706138 DOI: 10.1002/cphc.202200242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/24/2022] [Indexed: 11/08/2022]
Abstract
Semiempirical quantum mechanical methods provides a middle ground between a computationally demanding full ab initio quantum chemistry calculations and force-field calculations in application to molecule-surface interactions. In this study, PM7 semiempirical method is used to evaluate adsorption energy values of X@h-BN monolayer [X= O, OH, and H 2 O] followed by a mechanistic study of oxygen-induced water dissociation on a free-standing h-BN monolayer. Based on oxygen adsorption configurations, two reaction pathways for water dissociation are studied that yield two distinct configurations of double OH-functionalized h-BN monolayer. We then investigated the effect of a cover layer graphene on these proposed mechanistic pathways by placing the graphene cover layer on the top of the h-BN monolayer and continuously tuning the separation ( d Gr/h-BN ) between these two layers.
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Affiliation(s)
- Moumita Majumder
- IIT Jodhpur: Indian Institute of Technology Jodhpur, Metallurgical and Materials Engineering, INDIA
| | - Ashwani K Tiwari
- Indian Institute of Science Education and Research Kolkata, Chemical Sciences, IISER Kolkata, Mohanpur Campus, India, 741246, Mohanpur, INDIA
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10
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Transition metals Fe3+, Ni2+ modified titanium dioxide (TiO2) film sensors fabricated by CPT method to sense some toxic environmental pollutant gases. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100126] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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11
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Zhang L, Chen H, Wei Z. Recent Advances in Nanoparticles Confined in Two‐Dimensional Materials as High‐Performance Electrocatalysts for Energy‐Conversion Technologies. ChemCatChem 2021. [DOI: 10.1002/cctc.202001260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ling Zhang
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization School of Chemistry and Chemical Engineering Chongqing University Chongqing P. R. China
| | - Hongmei Chen
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization School of Chemistry and Chemical Engineering Chongqing University Chongqing P. R. China
| | - Zidong Wei
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization School of Chemistry and Chemical Engineering Chongqing University Chongqing P. R. China
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12
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Mahmood A, Shi G, Wang Z, Rao Z, Xiao W, Xie X, Sun J. Carbon quantum dots-TiO 2 nanocomposite as an efficient photocatalyst for the photodegradation of aromatic ring-containing mixed VOCs: An experimental and DFT studies of adsorption and electronic structure of the interface. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123402. [PMID: 32763698 DOI: 10.1016/j.jhazmat.2020.123402] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
In this work, we have developed and optimized TiO2 nanoparticles decorated with carbon quantum dots to examine its potential use in the photocatalytic oxidation of aromatic ring containing gas-phase mixed volatile organic compounds, e.g., benzene, toluene, and p-xylene. Carbon quantum dots decorated TiO2 demonstrated good photodegradation efficiency in contrast to pure TiO2 under UV-vis light illumination. For example, with 0.5 wt% carbon quantum dots decorated on TiO2, 64 % of the mixed volatile organic compounds were photodegraded, while pure TiO2 only exhibited 44 % of the photodegradation efficiency. Also, the carbon quantum dots (0.5 wt%)/TiO2 nanocomposite demonstrated considerable photocatalytic activity within the visible region. On the other hand, pure TiO2 remained inactive within the visible region. The density functional theory study of the carbon quantum dots/TiO2 interface revealed that C 2p states of carbon quantum dots incorporated new energy states around the Fermi level near the lowest conduction band. This might be accountable for the improved charge separation process and better conductivity of the photogenerated electrons. The improved photocatalytic performance of the carbon quantum dots/TiO2 nanocomposites can be attributed to good light harvesting within the UV-vis region, charge separation, and adsorption capability.
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Affiliation(s)
- Asad Mahmood
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China.
| | - Gansheng Shi
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Zhuang Wang
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Zepeng Rao
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Wang Xiao
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Xiaofeng Xie
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Jing Sun
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China.
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13
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Zhang L, Ng ML, Vojvodic A. Role of Undercoordinated Sites for the Catalysis in Confined Spaces Formed by Two-Dimensional Material Overlayers. J Phys Chem Lett 2020; 11:9400-9407. [PMID: 33104328 DOI: 10.1021/acs.jpclett.0c02652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Adding a two-dimensional (2D) overlayer on a metal surface is a promising route for activating reactants confined in the interfacial space. However, an atomistic understanding of the role played by undercoordinated sites of the 2D overlayer in the activation of molecules in this nanoscaled confined space is yet to be developed. In this paper, we study CO dissociation as a prototypical reaction to investigate CO activation in the confined space enclosed by Rh(111) and a monolayer of hexagonal boron nitride (h-BN). The effect of the space size (i.e., the distance between h-BN and the metal surface), the type of undercoordinated sites, and the size of the defect are explicitly studied by density functional theory with dispersion correction. The following temperature-programmed X-ray photoelectron spectroscopy measurement suggests that a small portion of the CO dissociated during the desorption, leaving the residual atomic oxygen incorporated into the h-BN lattice, which validates the theoretical prediction. The combination of theory and experiment calls for further attention to be paid to the role of undercoordinated sites in the 2D overlayers in confined systems forming potential new catalytic environments.
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Affiliation(s)
- Liang Zhang
- Center for Combustion Energy, Tsinghua University, Beijing 100084, China
- School of Vehicle and Mobility, Tsinghua University, Beijing 100084, China
- State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
| | - May Ling Ng
- SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Aleksandra Vojvodic
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6315, United States
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14
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Cai J, Cai R, Sun Z, Wang X, Wei N, Xu F, Shao Y, Gao P, Dou S, Sun J. Confining TiO 2 Nanotubes in PECVD-Enabled Graphene Capsules Toward Ultrafast K-Ion Storage: In Situ TEM/XRD Study and DFT Analysis. NANO-MICRO LETTERS 2020; 12:123. [PMID: 34138148 PMCID: PMC7770745 DOI: 10.1007/s40820-020-00460-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 05/09/2020] [Indexed: 05/28/2023]
Abstract
Titanium dioxide (TiO2) has gained burgeoning attention for potassium-ion storage because of its large theoretical capacity, wide availability, and environmental benignity. Nevertheless, the inherently poor conductivity gives rise to its sluggish reaction kinetics and inferior rate capability. Here, we report the direct graphene growth over TiO2 nanotubes by virtue of chemical vapor deposition. Such conformal graphene coatings effectively enhance the conductive environment and well accommodate the volume change of TiO2 upon potassiation/depotassiation. When paired with an activated carbon cathode, the graphene-armored TiO2 nanotubes allow the potassium-ion hybrid capacitor full cells to harvest an energy/power density of 81.2 Wh kg-1/3746.6 W kg-1. We further employ in situ transmission electron microscopy and operando X-ray diffraction to probe the potassium-ion storage behavior. This work offers a viable and versatile solution to the anode design and in situ probing of potassium storage technologies that is readily promising for practical applications.
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Affiliation(s)
- Jingsheng Cai
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, Jiangsu, People's Republic of China
| | - Ran Cai
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, People's Republic of China
| | - Zhongti Sun
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, Jiangsu, People's Republic of China
| | - Xiangguo Wang
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, Jiangsu, People's Republic of China
| | - Nan Wei
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, Jiangsu, People's Republic of China
- Beijing Graphene Institute (BGI), Beijing, 100095, People's Republic of China
| | - Feng Xu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, People's Republic of China.
| | - Yuanlong Shao
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, Jiangsu, People's Republic of China
- Beijing Graphene Institute (BGI), Beijing, 100095, People's Republic of China
| | - Peng Gao
- Beijing Graphene Institute (BGI), Beijing, 100095, People's Republic of China.
- Electron Microscopy Laboratory, International Centre for Quantum Materials, School of Physics, Peking University, Beijing, 100871, People's Republic of China.
| | - Shixue Dou
- Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Jingyu Sun
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, Jiangsu, People's Republic of China.
- Beijing Graphene Institute (BGI), Beijing, 100095, People's Republic of China.
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15
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Tang L, Meng X, Deng D, Bao X. Confinement Catalysis with 2D Materials for Energy Conversion. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1901996. [PMID: 31390100 DOI: 10.1002/adma.201901996] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/09/2019] [Indexed: 06/10/2023]
Abstract
The unique electronic and structural properties of 2D materials have triggered wide research interest in catalysis. The lattice of 2D materials and the interface between 2D covers and other substrates provide intriguing confinement environments for active sites, which has stimulated a rising area of "confinement catalysis with 2D materials." Fundamental understanding of confinement catalysis with 2D materials will favor the rational design of high-performance 2D nanocatalysts. Confinement catalysis with 2D materials has found extensive applications in energy-related reaction processes, especially in the conversion of small energy-related molecules such as O2 , CH4 , CO, CO2 , H2 O, and CH3 OH. Two representative strategies, i.e., 2D lattice-confined single atoms and 2D cover-confined metals, have been applied to construct 2D confinement catalytic systems with superior catalytic activity and stability. Herein, the recent advances in the design, applications, and structure-performance analysis of two 2D confinement catalytic systems are summarized. The different routes for tuning the electronic states of 2D confinement catalysts are highlighted and perspectives on confinement catalysis with 2D materials toward energy conversion and utilization in the future are provided.
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Affiliation(s)
- Lei Tang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xianguang Meng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
| | - Dehui Deng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xinhe Bao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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16
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Li H, Guo C, Fu Q, Xiao J. Toward Fundamentals of Confined Electrocatalysis in Nanoscale Reactors. J Phys Chem Lett 2019; 10:533-539. [PMID: 30642184 DOI: 10.1021/acs.jpclett.8b03448] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A number of experiments have demonstrated that electrochemical reactions are feasible in confined nanoscale reactors, while what the fundamentals of confined electrochemistry are is not clear. Using first-principles calculations and electrochemical modeling, we find that the capacitance in the confined nanoscale reactors can be significantly enhanced, compared to an open electrode interface, essentially promoting the electrochemical reactions and charge transfer efficiency in nanoscale reactors. More importantly, this is a general character, as found in a variety of electrochemical and thermochemical reactions. At the end, we use the recently defined new concept of "confinement energy" for understanding the nature of confined electrochemistry from both thermochemical and electrochemical points of view.
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Affiliation(s)
- Haobo Li
- Institute of Natural Science, Westlake Institute for Advanced Study, School of Science , Westlake University , Hangzhou 310024 , People's Republic of China
| | - Chenxi Guo
- Institute of Natural Science, Westlake Institute for Advanced Study, School of Science , Westlake University , Hangzhou 310024 , People's Republic of China
| | - Qiang Fu
- State Key Laboratory of Catalysis , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Zhongshan Road 457 , Dalian 116023 , People's Republic of China
| | - Jianping Xiao
- Institute of Natural Science, Westlake Institute for Advanced Study, School of Science , Westlake University , Hangzhou 310024 , People's Republic of China
- State Key Laboratory of Catalysis , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Zhongshan Road 457 , Dalian 116023 , People's Republic of China
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17
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Romero-Muñiz C, Nakata A, Pou P, Bowler DR, Miyazaki T, Pérez R. High-accuracy large-scale DFT calculations using localized orbitals in complex electronic systems: the case of graphene-metal interfaces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:505901. [PMID: 30468156 DOI: 10.1088/1361-648x/aaec4c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Over many years, computational simulations based on density functional theory (DFT) have been used extensively to study many different materials at the atomic scale. However, its application is restricted by system size, leaving a number of interesting systems without a high-accuracy quantum description. In this work, we calculate the electronic and structural properties of a graphene-metal system significantly larger than in previous plane-wave calculations with the same accuracy. For this task we use a localised basis set with the Conquest code, both in their primitive, pseudo-atomic orbital form, and using a recent multi-site approach. This multi-site scheme allows us to maintain accuracy while saving computational time and memory requirements, even in our exemplar complex system of graphene grown on Rh(1 1 1) with and without intercalated atomic oxygen. This system offers a rich scenario that will serve as a benchmark, demonstrating that highly accurate simulations in cells with over 3000 atoms are feasible with modest computational resources.
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Affiliation(s)
- Carlos Romero-Muñiz
- Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain. First-Principles Simulation Group, Nano-Theory Field, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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18
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Wang Q, Zhang Z, Wang L, Zhang Y, Zhou X, Ma G. Ultrafast Fabrication of TiO2
-Inlaid Multilayered Carbon for Supercapacitor. ChemistrySelect 2018. [DOI: 10.1002/slct.201802576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Qingtao Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education; Key Laboratory of Polymer Materials of Gansu Province; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 China
| | - Zhonghao Zhang
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education; Key Laboratory of Polymer Materials of Gansu Province; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 China
| | - Lipeng Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education; Key Laboratory of Polymer Materials of Gansu Province; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 China
| | - Yongxia Zhang
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education; Key Laboratory of Polymer Materials of Gansu Province; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 China
| | - Xiaozhong Zhou
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education; Key Laboratory of Polymer Materials of Gansu Province; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 China
| | - Guofu Ma
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education; Key Laboratory of Polymer Materials of Gansu Province; College of Chemistry and Chemical Engineering; Northwest Normal University; Lanzhou 730070 China
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19
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Agnoli S. Interfacial Chemistry of Low‐Dimensional Systems for Applications in Nanocatalysis. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800730] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Stefano Agnoli
- Department of Chemical Sciences and INSTM Research Unit University of Padova Via F. Marzolo 1 35131 Padova Italy
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20
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Deng Q, Zhang W, Lan T, Xie J, Xie W, Liu Z, Huang Y, Wei M. Anatase TiO2Quantum Dots with a Narrow Band Gap of 2.85 eV Based on Surface Hydroxyl Groups Exhibiting Significant Photodegradation Property. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800097] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qixin Deng
- Technical Centre of Fujian Tobacco Industrial Corporation; 361022 Xiamen ujian P. R. China
| | - Weifeng Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment; Fuzhou University; 350002 Fuzhou Fujian P. R. China
| | - Tongbin Lan
- State Key Laboratory of Photocatalysis on Energy and Environment; Fuzhou University; 350002 Fuzhou Fujian P. R. China
| | - Jianping Xie
- Zhengzhou Tobacco Research Institute of CNTC; 450001 Zhengzhou China
| | - Wei Xie
- Technical Centre of Fujian Tobacco Industrial Corporation; 361022 Xiamen ujian P. R. China
| | - Zechun Liu
- Technical Centre of Fujian Tobacco Industrial Corporation; 361022 Xiamen ujian P. R. China
| | - Yanjun Huang
- Technical Centre of Fujian Tobacco Industrial Corporation; 361022 Xiamen ujian P. R. China
| | - Mingdeng Wei
- State Key Laboratory of Photocatalysis on Energy and Environment; Fuzhou University; 350002 Fuzhou Fujian P. R. China
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21
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Zhang L, Zheng Q, Xie Y, Lan Z, Prezhdo OV, Saidi WA, Zhao J. Delocalized Impurity Phonon Induced Electron-Hole Recombination in Doped Semiconductors. NANO LETTERS 2018; 18:1592-1599. [PMID: 29393653 DOI: 10.1021/acs.nanolett.7b03933] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Semiconductor doping is often proposed as an effective route to improving the solar energy conversion efficiency by engineering the band gap; however, it may also introduce electron-hole (e-h) recombination centers, where the determining element for e-h recombination is still unclear. Taking doped TiO2 as a prototype system and by using time domain ab initio nonadiabatic molecular dynamics, we find that the localization of impurity-phonon modes (IPMs) is the key parameter to determine the e-h recombination time scale. Noncompensated charge doping introduces delocalized impurity-phonon modes that induce ultrafast e-h recombination within several picoseconds. However, the recombination can be largely suppressed using charge-compensated light-mass dopants due to the localization of their IPMs. For different doping systems, the e-h recombination time is shown to depend exponentially on the IPM localization. We propose that the observation that delocalized IPMs can induce fast e-h recombination is broadly applicable and can be used in the design and synthesis of functional semiconductors with optimal dopant control.
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Affiliation(s)
| | | | - Yu Xie
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , China
| | - Zhenggang Lan
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao , Shandong 266101 , China
| | - Oleg V Prezhdo
- Departments of Chemistry, and Physics and Astronomy , University of Southern California , Los Angeles , California 90089 , United States
| | - Wissam A Saidi
- Department of Mechanical Engineering and Materials Science , University of Pittsburgh , Pittsburgh , Pennsylvania 15261 , United States
| | - Jin Zhao
- Department of Physics and Astronomy , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
- Synergetic Innovation Center of Quantum Information & Quantum Physics and ∇Department of Physics , University of Science and Technology of China , Hefei , Anhui 230026 , China
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22
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Datteo M, Liu H, Di Valentin C. Water on Graphene-Coated TiO 2: Role of Atomic Vacancies. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5793-5804. [PMID: 29368503 PMCID: PMC5916463 DOI: 10.1021/acsami.7b18087] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Beyond two-dimensional (2D) materials, interfaces between 2D materials and underlying supports or 2D-coated metal or metal oxide nanoparticles exhibit excellent properties and promising applications. The hybrid interface between graphene and anatase TiO2 shows great importance in photocatalytic, catalytic, and nanomedical applications due to the excellent and complementary properties of the two materials. Water, as a ubiquitous and essential element in practical conditions and in the human body, plays a significant role in the applications of graphene/TiO2 composites for both electronic devices and nanomedicine. Carbon vacancies, as common defects in chemically prepared graphene, also need to be considered for the application of graphene-based materials. Therefore, the behavior of water on top and at the interface of defective graphene on anatase TiO2 surface was systematically investigated by dispersion-corrected hybrid density functional calculations. The presence of the substrate only slightly enhances the on-top adsorption and reduces the on-top dissociation of water on defective graphene. However, at the interface, dissociated water is largely preferred compared with undissociated water on bare TiO2 surface, showing a prominent cover effect. Reduced TiO2 may further induce oxygen diffusion into the bulk. Our results are helpful to understand how the presence of water in the surrounding environment affects structural and electronic properties of the graphene/TiO2 interface and thus its application in photocatalysis, electronic devices, and nanomedicine.
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23
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Wang X, Zhao Y, Mølhave K, Sun H. Engineering the Surface/Interface Structures of Titanium Dioxide Micro and Nano Architectures towards Environmental and Electrochemical Applications. NANOMATERIALS 2017; 7:nano7110382. [PMID: 29120393 PMCID: PMC5707599 DOI: 10.3390/nano7110382] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/05/2017] [Accepted: 11/06/2017] [Indexed: 11/16/2022]
Abstract
Titanium dioxide (TiO₂) materials have been intensively studied in the past years because of many varied applications. This mini review article focuses on TiO₂ micro and nano architectures with the prevalent crystal structures (anatase, rutile, brookite, and TiO₂(B)), and summarizes the major advances in the surface and interface engineering and applications in environmental and electrochemical applications. We analyze the advantages of surface/interface engineered TiO₂ micro and nano structures, and present the principles and growth mechanisms of TiO₂ nanostructures via different strategies, with an emphasis on rational control of the surface and interface structures. We further discuss the applications of TiO₂ micro and nano architectures in photocatalysis, lithium/sodium ion batteries, and Li-S batteries. Throughout the discussion, the relationship between the device performance and the surface/interface structures of TiO₂ micro and nano structures will be highlighted. Then, we discuss the phase transitions of TiO₂ nanostructures and possible strategies of improving the phase stability. The review concludes with a perspective on the current challenges and future research directions.
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Affiliation(s)
- Xiaoliang Wang
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China.
| | - Yanyan Zhao
- Department of Chemistry Boston College Merkert Chemistry Center, 2609 Beacon St., Chestnut Hill, MA 02467, USA.
| | - Kristian Mølhave
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kongens Lyngby 2800, Denmark.
| | - Hongyu Sun
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kongens Lyngby 2800, Denmark.
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24
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Wang S, Feng Y, Yu M, Wan Q, Lin S. Confined Catalysis in the g-C 3N 4/Pt(111) Interface: Feasible Molecule Intercalation, Tunable Molecule-Metal Interaction, and Enhanced Reaction Activity of CO Oxidation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:33267-33273. [PMID: 28876886 DOI: 10.1021/acsami.7b08665] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The deposition of a two-dimensional (2D) atomic nanosheet on a metal surface has been considered as a new route for tuning the molecule-metal interaction and surface reactivity in terms of the confinement effect. In this work, we use first-principles calculations to systematically explore a novel nanospace constructed by placing a 2D graphitic carbon nitride (g-C3N4) nanosheet over a Pt(111) surface. The confined catalytic activity in this nanospace is investigated using CO oxidation as a model reaction. With the inherent triangular pores in the g-C3N4 overlayer being taken advantage of, molecules such as CO and O2 can diffuse to adsorb on the Pt(111) surface underneath the g-C3N4 overlayer. Moreover, the mechanism of intercalation is also elucidated, and the results reveal that the energy barrier depends mainly on the properties of the molecule and the channel. Importantly, the molecule-catalyst interaction can be tuned by the g-C3N4 overlayer, considerably reducing the adsorption energy of CO on Pt(111) and leading to enhanced reactivity in CO oxidation. This work will provide important insight for constructing a promising nanoreactor in which the following is observed: The molecule intercalation is facile; the molecule-metal interaction is efficiently tuned; the metal-catalyzed reaction is promoted.
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Affiliation(s)
- Shujiao Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University , Fuzhou 350002, China
| | - Yingxin Feng
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University , Fuzhou 350002, China
| | - Ming'an Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University , Fuzhou 350002, China
| | - Qiang Wan
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University , Fuzhou 350002, China
| | - Sen Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University , Fuzhou 350002, China
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25
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Ferrighi L, Perilli D, Selli D, Di Valentin C. Water at the Interface Between Defective Graphene and Cu or Pt (111) Surfaces. ACS APPLIED MATERIALS & INTERFACES 2017; 9:29932-29941. [PMID: 28795791 DOI: 10.1021/acsami.7b06633] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The presence of defects in the graphenic layers deposited on metal surfaces modifies the nature of the interaction. Unsaturated carbon atoms, due to vacancies in the lattice, form strong organometallic bonds with surface metal atoms that highly enhance the binding energy between the two materials. We investigate by means of a wide set of dispersion-corrected density functional theory calculations how such strong chemical bonds affect both the electronic properties of these hybrid interfaces and the chemical reactivity with water, which is commonly present in the working conditions. We compare different metal substrates (Cu vs Pt) that present a different type of interaction with graphene and with defective graphene. This comparative analysis allows us to unravel the controlling factors of water reactivity, the role played by the carbon vacancies and by the confinement or "graphene cover effect". Water is capable of breaking the C-Cu bond by dissociating at the undercoordinated carbon atom of the vacancy, restoring the weak van der Waals type of interaction between the two materials that allows for an easy detachment of graphene from the metal, but the same is not true in the case of Pt, where C-Pt bonds are much stronger. These conclusions can be used to rationalize water reactivity at other defective graphene/metal interfaces.
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Affiliation(s)
- Lara Ferrighi
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca , via Cozzi 55, 20125 Milano, Italy
| | - Daniele Perilli
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca , via Cozzi 55, 20125 Milano, Italy
| | - Daniele Selli
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca , via Cozzi 55, 20125 Milano, Italy
| | - Cristiana Di Valentin
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca , via Cozzi 55, 20125 Milano, Italy
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26
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Wang L, Meng Y, Zhang Y, Zhang C, Xie Q, Yao S. Photoelectrochemical aptasensing of thrombin based on multilayered gold nanoparticle/graphene-TiO 2 and enzyme functionalized graphene oxide nanocomposites. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.179] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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27
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Pan C, Huang B, Li X, Zhu H, Zhang D, Zheng A, Li Y, Sun Y. Synthesis and Catalytic Property of Fibrous Titanium-Containing Graphite Oxide. CATALYSIS SURVEYS FROM ASIA 2017. [DOI: 10.1007/s10563-017-9233-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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28
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Selli D, Fazio G, Seifert G, Di Valentin C. Water Multilayers on TiO 2 (101) Anatase Surface: Assessment of a DFTB-Based Method. J Chem Theory Comput 2017; 13:3862-3873. [PMID: 28679048 PMCID: PMC5562391 DOI: 10.1021/acs.jctc.7b00479] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
A water/(101)
anatase TiO2 interface has been investigated
with the DFT-based self-consistent-charge density functional tight-binding
theory (SCC-DFTB). By comparison of the computed structural, energetic,
and dynamical properties with standard DFT-GGA and experimental data,
we assess the accuracy of SCC-DFTB for this prototypical solid–liquid
interface. We tested different available SCC-DFTB parameters for Ti-containing
compounds and, accordingly, combined them to improve the reliability
of the method. To better describe water energetics, we have also introduced
a modified hydrogen-bond-damping function (HBD). With this correction,
equilibrium structures and adsorption energies of water on (101) anatase
both for low (0.25 ML) and full (1 ML) coverages are in excellent
agreement with those obtained with a higher level of theory (DFT-GGA).
Furthermore, Born–Oppenheimer molecular dynamics (MD) simulations
for mono-, bi-, and trilayers of water on the surface, as computed
with SCC-DFTB, evidence similar ordering and energetics as DFT-GGA
Car–Parrinello MD results. Finally, we have evaluated the energy
barrier for the dissociation of a water molecule on the anatase (101)
surface. Overall, the combined set of parameters with the HBD correction
(SCC-DFTB+HBD) is shown to provide a description of the water/water/titania
interface, which is very close to that obtained by standard DFT-GGA,
with a remarkably reduced computational cost. Hence, this study opens
the way to the future investigations on much more extended and realistic
TiO2/liquid water systems, which are extremely relevant
for many modern technological applications.
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Affiliation(s)
- Daniele Selli
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca , Milano, Italy
| | - Gianluca Fazio
- Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca , Milano, Italy.,Technische Universität Dresden , Institut für Theoretische Chemie, D-01062 Dresden, Germany
| | - Gotthard Seifert
- Technische Universität Dresden , Institut für Theoretische Chemie, D-01062 Dresden, Germany
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Wang Y, Liu X, Li Z, Cao Y, Li Y, Liu X, Jia S, Zhao Y. Ordered Single-Crystalline Anatase TiO 2 Nanorod Clusters Planted on Graphene for Fast Charge Transfer in Photoelectrochemical Solar Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1700793. [PMID: 28558166 DOI: 10.1002/smll.201700793] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 04/18/2017] [Indexed: 06/07/2023]
Abstract
Achieving efficient charge transport is a great challenge in nanostructured TiO2 -electrode-based photoelectrochemical cells. Inspired by excellent directional charge transport and the well-known electroconductibility of 1D anatase TiO2 nanostructured materials and graphene, respectively, planting ordered, single-crystalline anatase TiO2 nanorod clusters on graphene sheets (rGO/ATRCs) via a facial one-pot solvothermal method is reported. The hierarchical rGO/ATRCs nanostructure can serve as an efficient light-harvesting electrode for dye-sensitized solar cells. In addition, the obtained high-crystallinity anatase TiO2 nanorods in rGO/ATRCs possess a lower density of trap states, thus facilitating diffusion-driven charge transport and suppressing electron recombination. Moreover, the novel architecture significantly enhances the trap-free charge diffusion coefficient, which contributes to superior electron mobility properties. By virtue of more efficient charge transport and higher energy conversion efficiency, the rGO/ATRCs developed in this work show significant advantages over conventional rGO-TiO2 nanoparticle counterparts in photoelectrochemical cells.
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Affiliation(s)
- Yang Wang
- Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, P. R. China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Xueqin Liu
- Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, P. R. China
| | - Zhen Li
- Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, P. R. China
| | - Ya Cao
- Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, P. R. China
| | - Yinchang Li
- Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, P. R. China
| | - Xupo Liu
- Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, P. R. China
| | - Songru Jia
- Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan, 430074, P. R. China
| | - Yanli Zhao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
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Abstract
Confined microenvironments formed in heterogeneous catalysts have recently been recognized as equally important as catalytically active sites. Understanding the fundamentals of confined catalysis has become an important topic in heterogeneous catalysis. Well-defined 2D space between a catalyst surface and a 2D material overlayer provides an ideal microenvironment to explore the confined catalysis experimentally and theoretically. Using density functional theory calculations, we reveal that adsorption of atoms and molecules on a Pt(111) surface always has been weakened under monolayer graphene, which is attributed to the geometric constraint and confinement field in the 2D space between the graphene overlayer and the Pt(111) surface. A similar result has been found on Pt(110) and Pt(100) surfaces covered with graphene. The microenvironment created by coating a catalyst surface with 2D material overlayer can be used to modulate surface reactivity, which has been illustrated by optimizing oxygen reduction reaction activity on Pt(111) covered by various 2D materials. We demonstrate a concept of confined catalysis under 2D cover based on a weak van der Waals interaction between 2D material overlayers and underlying catalyst surfaces.
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Fu Q, Bao X. Surface chemistry and catalysis confined under two-dimensional materials. Chem Soc Rev 2017; 46:1842-1874. [DOI: 10.1039/c6cs00424e] [Citation(s) in RCA: 292] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Interfaces between 2D material overlayers and solid surfaces provide confined spaces for chemical processes, which have stimulated new chemistry under a 2D cover.
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Affiliation(s)
- Qiang Fu
- State Key Laboratory of Catalysis
- iChEM
- Dalian Institute of Chemical Physics, the Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Xinhe Bao
- State Key Laboratory of Catalysis
- iChEM
- Dalian Institute of Chemical Physics, the Chinese Academy of Sciences
- Dalian 116023
- P. R. China
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Zhou Y, Chen W, Cui P, Zeng J, Lin Z, Kaxiras E, Zhang Z. Enhancing the Hydrogen Activation Reactivity of Nonprecious Metal Substrates via Confined Catalysis Underneath Graphene. NANO LETTERS 2016; 16:6058-6063. [PMID: 27588556 DOI: 10.1021/acs.nanolett.6b02052] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the hydrogen evolution reaction (HER), the reactivity as a function of the hydrogen adsorption energy on different metal substrates follows a well-known volcano curve, peaked at the precious metal Pt. The goal of turning nonprecious metals into efficient catalysts for HER and other important chemical reactions is a fundamental challenge; it is also of technological significance. Here, we present results toward achieving this goal by exploiting the synergistic power of marginal catalysis and confined catalysis. Using density functional theory calculations, we first show that the volcano curve stays qualitatively intact when van der Waals attractions between a hydrogen adatom and different metal (111) surfaces are included. We further show that the hydrogen adsorption energy on the metal surfaces is weakened by 0.12-0.23 eV when hydrogen is confined between graphene and the metal surfaces, with Ni exhibiting the largest change. In particular, we find that the graphene-modified volcano curve peaks around Ni, whose bare surface already possesses moderate (or marginal) reactivity, and the corresponding HER rate of graphene-covered Ni is comparable to that of bare Pt. A hydrogen adatom has high mobility within the confined geometry. These findings demonstrate that graphene-covered Ni is an appealing effective, stable, and economical catalytic platform for HER.
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Affiliation(s)
- Yinong Zhou
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Wei Chen
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- Department of Physics and School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Ping Cui
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Jiang Zeng
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- Beijing Computational Science Research Center, Beijing 100094, China
| | - Zhuonan Lin
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
- School of Physics and Technology, Wuhan University , Wuhan 430072, China
| | - Efthimios Kaxiras
- Department of Physics and School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Zhenyu Zhang
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at the Microscale, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
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