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Daemi S, Kaushik S, Das S, Hamann TW, Osterloh FE. BiVO 4-Liquid Junction Photovoltaic Cell with 0.2% Solar Energy Conversion Efficiency. J Am Chem Soc 2023; 145:25797-25805. [PMID: 37964539 DOI: 10.1021/jacs.3c09546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
BiVO4 is an important photoanode material for water oxidation, but its photoelectrochemistry regarding the triiodide/iodide redox couple is not well understood. Here, we use a combination of open circuit potential measurements, photoelectrochemical scans, and liquid surface photovoltage spectroscopy (SPS) to confirm that BiVO4/triiodide/iodide electrolyte contacts produce up to 0.55 V photovoltage under 23 mW/cm-2 illumination from a 470 nm LED. Inspired by these results, we construct FTO/BiVO4/KI(I2)aq/Pt sandwich photoelectrochemical cells from electrochemically grown 0.5 × 0.5 cm2 BiVO4 and Mo-doped BiVO4 films. Under AM 1.5 illumination, the devices have up to 0.22% energy conversion efficiency, 0.32 V photovoltage, and 1.8 mA cm-2 photocurrent. Based on SPS, hole transfer to iodide is sufficiently fast to prevent the competing water oxidation reaction. Mo doping increases the incident photon-to-current efficiency to up to 55% (at 425 nm under front illumination) by improving the BiVO4 conductivity, but this comes at the expense of a lower photovoltage resulting from recombination at the Mo defects and a detrimental Schottky junction at the interface with FTO. Additional photovoltage losses are caused by the offset between the BiVO4 valence band edge and the triiodide/iodide electrochemical potential and by electron back transfer to iodide at the FTO back contact (shunting). Overall, this work provides the first example of a BiVO4-liquid photovoltaic cell and an analysis of its limitations. Even though the larger band gaps of metal oxides constrain their solar energy conversion efficiency, their transparency to visible light and deep valence bands makes them suitable for tandem photovoltaic devices.
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Affiliation(s)
- Sahar Daemi
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Samhita Kaushik
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Soumik Das
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Thomas W Hamann
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824-1322, United States
| | - Frank E Osterloh
- Department of Chemistry, University of California, Davis, California 95616, United States
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2
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Feng J, Xu S, Du H, Gong Q, Xie S, Deng W, Zhang Q, Wang Y. Advances in the solar-energy driven conversion of methanol to value-added chemicals. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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3
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Abstract
In photochemical production of hydrogen from water, the hole-mediated oxidation reaction is the rate-determining step. A poor solar-to-hydrogen efficiency is usually related to a mismatch between the internal quantum efficiency of photon-induced hole generation and the apparent quantum yield of hydrogen. This waste of photogenerated holes is unwanted yet unavoidable. Although great progress has been made, we are still far away from the required level of dexterity to deal with the associated challenges of wasted holes and its consequential chemical effects that have placed one of the greatest bottlenecks in attaining high solar-to-hydrogen efficiency. A critical assessment of the hole and its related phenomena in solar hydrogen production would, therefore, pave the way moving forward. In this regard, we focus on the contextual and conceptual understanding of the dynamics and kinetics of photogenerated holes and its critical role in driving redox reactions, with the objective of guiding future research. The main reasons behind and consequences of unused holes are examined and different approaches to improve overall efficiency are outlined. We also highlight yet unsolved research questions related to holes in solar fuel production.
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4
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Kumar A, Kumar A, Krishnan V. Perovskite Oxide Based Materials for Energy and Environment-Oriented Photocatalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02947] [Citation(s) in RCA: 205] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Ashish Kumar
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
| | - Ajay Kumar
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
| | - Venkata Krishnan
- School of Basic Sciences and Advanced Materials Research Center, Indian Institute of Technology Mandi, Kamand, Mandi, Himachal Pradesh 175075, India
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5
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Regarding the Nature of Charge Carriers Formed by UV or Visible Light Excitation of Carbon-Modified Titanium Dioxide. Catalysts 2019. [DOI: 10.3390/catal9080697] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Although titanium dioxide gathers many of the required properties for its application in photocatalytic processes, its lack of activity in the visible range is a major hurdle yet to be overcome. Among different strategies, the post-synthesis modification of TiO2 powders with organic compounds has already led to commercially available materials, such as KRONOClean 7000. In this work, we apply diffuse reflectance transient absorption spectroscopy on this visible-light active photocatalyst and study the dynamics of the charge carriers alternatively induced by UV or visible light laser irradiation, under inert or reactive atmospheres. Our results can be interpreted by considering the material as TiO2 sensitized by an organic-based layer, in agreement with previous studies on it, and show that the oxidative power of the material is considerably diminished under visible light irradiation. By complementarily performing continuous visible light irradiation photocatalysis experiments in aerated aqueous suspensions, we show that, although the oxidation of methanol proceeds at a very slow rate, the oxidation of chlorpromazine occurs much faster thanks to its better suited redox potential.
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6
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Photocatalytic Degradation of Microcystins by TiO2 Using UV-LED Controlled Periodic Illumination. Catalysts 2019. [DOI: 10.3390/catal9020181] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Toxic microcystins (MCs) produced by freshwater cyanobacteria such as Microcystis aeruginosa are of concern because of their negative health and economic impacts globally. An advanced oxidation process using UV/TiO2 offers a promising treatment option for hazardous organic pollutants such as microcystins. The following work details the successful degradation of MC-LA, MC-LR, and MC-RR using a porous titanium–titanium dioxide (PTT) membrane under UV-LED light. Microcystin quantitation was achieved by sample concentration and subsequent LC–MS/MS analysis. The PTT membrane offers a treatment option that eliminates the need for the additional filtration or separation steps required for traditional catalysts. Controlled periodic illumination was successfully used to decrease the total light exposure time and improve the photonic efficiency for a more cost-effective treatment system. Individual degradation rates were influenced by electrostatic forces between the catalyst and differently charged microcystins, which can potentially be adjusted by modifying the solution pH and the catalyst’s isoelectric point.
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7
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Xu P, Yang HW, Shi JL, Ding B, Zhao XJ, Yang EC. Efficient detection of a biomarker for infant jaundice by a europium(iii)-organic framework luminescence sensor. RSC Adv 2019; 9:37584-37593. [PMID: 35542293 PMCID: PMC9075806 DOI: 10.1039/c9ra08604h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 11/04/2019] [Indexed: 11/21/2022] Open
Abstract
Efficient detection of excess bilirubin in human serum and urine is highly important for the early diagnosis of infant jaundice. A highly stable Eu(iii)-based microporous framework with bent {Eu(COO)} chains interconnected by pairs of T-shaped 4,4′-(4,4′-bipyridine-2,6-diyl)dibenzoate (bpydb2−) linkers, {[Eu(H2O)(HCOO)(bpydb)]·solvent}n (1), was solvothermally synthesized and used as a chemical sensor for bilirubin response under clinically-applicable visible-light excitation. Due to the significant synergetic effect of the inner filter effect and photoinduced electron transfer, 1 can effectively probe trace amounts of bilirubin in aqueous solution through fluorescence decay with a strong quenching constant of 6.40 × 104 M−1 and low detection limit of 1.75 μM. More importantly, a portable test paper made from 1 was further developed to achieve qualitative, naked-eye visualized differentiation for the biomarker in clinical applications. These interesting findings highlight the importance of the π-conjugated antenna ligand for clinically applicable Ln-MOF sensors. A Eu(iii)–MOF sensor with intense red luminescence can effectively probe bilirubin in water through fluorescence decay, and can be fabricated into portable test papers to achieve visualized detection of bilirubin.![]()
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Affiliation(s)
- Ping Xu
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- College of Chemistry
- Tianjin Normal University
| | - Han-Wen Yang
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- College of Chemistry
- Tianjin Normal University
| | - Jia-Li Shi
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- College of Chemistry
- Tianjin Normal University
| | - Bo Ding
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- College of Chemistry
- Tianjin Normal University
| | - Xiao-Jun Zhao
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- College of Chemistry
- Tianjin Normal University
| | - En-Cui Yang
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry
- Ministry of Education
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules
- College of Chemistry
- Tianjin Normal University
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8
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Understanding photocatalytic overall water splitting on CoO nanoparticles: Effects of facets, surface stoichiometry, and the CoO/water interface. J Catal 2018. [DOI: 10.1016/j.jcat.2018.06.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Kromer ML, Monzó J, Lawrence MJ, Kolodziej A, Gossage ZT, Simpson BH, Morandi S, Yanson A, Rodríguez-López J, Rodríguez P. High-Throughput Preparation of Metal Oxide Nanocrystals by Cathodic Corrosion and Their Use as Active Photocatalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13295-13302. [PMID: 29088531 DOI: 10.1021/acs.langmuir.7b02465] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Nanoparticle metal oxide photocatalysts are attractive because of their increased reactivity and ease of processing into versatile electrode formats; however, their preparation is cumbersome. We report on the rapid bulk synthesis of photocatalytic nanoparticles with homogeneous shape and size via the cathodic corrosion method, a simple electrochemical approach applied for the first time to the versatile preparation of complex metal oxides. Nanoparticles consisting of tungsten oxide (H2WO4) nanoplates, titanium oxide (TiO2) nanowires, and symmetric star-shaped bismuth vanadate (BiVO4) were prepared conveniently using tungsten, titanium, and vanadium wires as a starting material. Each of the particles were extremely rapid to produce, taking only 2-3 min to etch 2.5 mm of metal wire into a colloidal dispersion of photoactive materials. All crystalline H2WO4 and BiVO4 particles and amorphous TiO2 were photoelectrochemically active toward the water oxidation reaction. Additionally, the BiVO4 particles showed enhanced photocurrent in the visible region toward the oxidation of a sacrificial sulfite reagent. This synthetic method provides an inexpensive alternative to conventional fabrication techniques and is potentially applicable to a wide variety of metal oxides, making the rapid fabrication of active photocatalysts with controlled crystallinity more efficient.
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Affiliation(s)
| | - Javier Monzó
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Matthew J Lawrence
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Adam Kolodziej
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, United Kingdom
| | | | | | - Sara Morandi
- Dipartimento di Chimica, Università degli Studi di Milano , via Golgi 19, 20133 Milano, Italy
| | - Alex Yanson
- Cosine Measurement Systems , Oosteinde 36, 2361 HE Leiden, The Netherlands
| | | | - Paramaconi Rodríguez
- School of Chemistry, University of Birmingham , Edgbaston, Birmingham B15 2TT, United Kingdom
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10
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Beke D, Károlyházy G, Czigány Z, Bortel G, Kamarás K, Gali A. Harnessing no-photon exciton generation chemistry to engineer semiconductor nanostructures. Sci Rep 2017; 7:10599. [PMID: 28878317 PMCID: PMC5587652 DOI: 10.1038/s41598-017-10751-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 08/14/2017] [Indexed: 11/09/2022] Open
Abstract
Production of semiconductor nanostructures with high yield and tight control of shape and size distribution is an immediate quest in diverse areas of science and technology. Electroless wet chemical etching or stain etching can produce semiconductor nanoparticles with high yield but is limited to a few materials because of the lack of understanding the physical-chemical processes behind. Here we report a no-photon exciton generation chemistry (NPEGEC) process, playing a key role in stain etching of semiconductors. We demonstrate NPEGEC on silicon carbide polymorphs as model materials. Specifically, size control of cubic silicon carbide nanoparticles of diameter below ten nanometers was achieved by engineering hexagonal inclusions in microcrystalline cubic silicon carbide. Our finding provides a recipe to engineer patterned semiconductor nanostructures for a broad class of materials.
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Affiliation(s)
- David Beke
- Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525, Budapest, Hungary.
| | - Gyula Károlyházy
- Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525, Budapest, Hungary.,Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 7-9., H-1111, Budapest, Hungary
| | - Zsolt Czigány
- Institute for Technical Physics and Materials Science, Centre for Energy Research, Hungarian Academy of Sciences, Konkoly-Thege M. út 29-33., H-1121, Budapest, Hungary
| | - Gábor Bortel
- Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525, Budapest, Hungary
| | - Katalin Kamarás
- Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525, Budapest, Hungary
| | - Adam Gali
- Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525, Budapest, Hungary. .,Department of Atomic Physics, Budapest University of Technology and Economics, Budafoki út 8., H-1111, Budapest, Hungary.
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11
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Hu Q, Liu X, Wu C, You Q, Shi T, Zhang W. A general and rapid approach to hybrid metal nanoparticle–ZnO nanowire arrays and their use as active substrates for surface-enhanced Raman scattering detection. RSC Adv 2016. [DOI: 10.1039/c5ra24113h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Rapid SERS substrate preparation: an aqueous phase reaction of metal precursors with ZnO@Zn has been exploited for synthesizing SERS-active metal–ZnO nanowire arrays.
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Affiliation(s)
- Qiyan Hu
- College of Chemistry and Materials Science
- Anhui Normal University
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
| | - Xiaowang Liu
- College of Chemistry and Materials Science
- Anhui Normal University
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
| | - Chaoting Wu
- College of Chemistry and Materials Science
- Anhui Normal University
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
| | - Qing You
- College of Chemistry and Materials Science
- Anhui Normal University
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
| | - Tianchao Shi
- College of Chemistry and Materials Science
- Anhui Normal University
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
| | - Wu Zhang
- College of Chemistry and Materials Science
- Anhui Normal University
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
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12
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Qi H, Yu P, Wang Y, Han G, Liu H, Yi Y, Li Y, Mao L. Graphdiyne Oxides as Excellent Substrate for Electroless Deposition of Pd Clusters with High Catalytic Activity. J Am Chem Soc 2015; 137:5260-3. [DOI: 10.1021/ja5131337] [Citation(s) in RCA: 295] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hetong Qi
- Beijing National Laboratory for
Molecular Sciences, Key Laboratory of Analytical Chemistry for Living
Biosystems, Key Laboratory of Organic Solids, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Ping Yu
- Beijing National Laboratory for
Molecular Sciences, Key Laboratory of Analytical Chemistry for Living
Biosystems, Key Laboratory of Organic Solids, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Yuexiang Wang
- Beijing National Laboratory for
Molecular Sciences, Key Laboratory of Analytical Chemistry for Living
Biosystems, Key Laboratory of Organic Solids, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Guangchao Han
- Beijing National Laboratory for
Molecular Sciences, Key Laboratory of Analytical Chemistry for Living
Biosystems, Key Laboratory of Organic Solids, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Huibiao Liu
- Beijing National Laboratory for
Molecular Sciences, Key Laboratory of Analytical Chemistry for Living
Biosystems, Key Laboratory of Organic Solids, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Yuanping Yi
- Beijing National Laboratory for
Molecular Sciences, Key Laboratory of Analytical Chemistry for Living
Biosystems, Key Laboratory of Organic Solids, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Yuliang Li
- Beijing National Laboratory for
Molecular Sciences, Key Laboratory of Analytical Chemistry for Living
Biosystems, Key Laboratory of Organic Solids, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
| | - Lanqun Mao
- Beijing National Laboratory for
Molecular Sciences, Key Laboratory of Analytical Chemistry for Living
Biosystems, Key Laboratory of Organic Solids, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100190, China
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13
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14
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Zhang Z, Sun T, Chen C, Xiao F, Gong Z, Wang S. Bifunctional nanocatalyst based on three-dimensional carbon nanotube-graphene hydrogel supported Pd nanoparticles: one-pot synthesis and its catalytic properties. ACS APPLIED MATERIALS & INTERFACES 2014; 6:21035-21040. [PMID: 25375195 DOI: 10.1021/am505911h] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We reported the development of a new type of bifunctional nanocatalyst based on three-dimensional (3D) macroscopic carbon nanotube (CNT)-graphene hydrogel (GH) supported Pd nanoparticles (i.e., Pd-CNT-GH) and explored its practical application in catalytic reduction of p-nitrophenol to p-aminophenol. The 3D Pd-CNT-GH was synthesized by a facile one-pot self-assembled approach through hydrothermal treatment of a mixed aqueous precursor solution of PdCl4(2-), CNT, and graphene oxide (GO). Under the appropriate condition, the spontaneous redox reaction between precursor PdCl4(2-) and CNT-GO as well as the self-assembly of macroscopic CNT-GH occurs simultaneously, leading to the formation of 3D Pd-CNT-GH. Because of the unique structural and functional properties of different components in the nanocatalyst and the synergistic effect between them, the as-prepared Pd-CNT-GH exhibits superior catalytic performance toward the reduction of p-nitrophenol to p-aminophenol, with 100% conversion within 30 s, even when the content of Pd in it is as low as 2.98 wt %. Moreover, after 20 successive cycles of reactions, the reaction time still keeps within 46 s. Therefore, the rational design of 3D macroscopic graphene-based nanohybrid material supported highly catalytically active nanoparticles, combined with the facile one-pot self-assembled strategy, provide a universal platform to fabricate desired 3D multifunctional nanomaterials that can be used in a broad range of catalysis, environmental protection, energy storage and conversation, drug delivery, chemical and biological sensing, and so forth.
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Affiliation(s)
- Zheye Zhang
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, People's Republic of China
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15
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Fundamentals on Adsorption, Membrane Filtration, and Advanced Oxidation Processes for Water Treatment. NANOTECHNOLOGY FOR WATER TREATMENT AND PURIFICATION 2014. [DOI: 10.1007/978-3-319-06578-6_1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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16
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Fan K, Guo Z, Geng Z, Ge J, Jiang S, Hu J, Zhang Q. How Graphene Oxide Quenches Fluorescence of Rhodamine 6G. CHINESE J CHEM PHYS 2013. [DOI: 10.1063/1674-0068/26/03/252-258] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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17
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Zhao J, Holmes MA, Osterloh FE. Quantum confinement controls photocatalysis: a free energy analysis for photocatalytic proton reduction at CdSe nanocrystals. ACS NANO 2013; 7:4316-25. [PMID: 23590186 DOI: 10.1021/nn400826h] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The ability to adjust the mechanical, optical, magnetic, electric, and chemical properties of materials via the quantum confinement effect is well-understood. Here, we provide the first quantitative analysis of quantum-size-controlled photocatalytic H2 evolution at the semiconductor-solution interface. Specifically, it is found that the hydrogen evolution rate from illuminated suspended CdSe quantum dots in aqueous sodium sulfite solution depends on nanocrystal size. Photoelectrochemical measurements on CdSe nanocrystal films reveal that the observed reactivity is controlled by the free energy change of the system, as determined by the proton reduction potential and the quasi-Fermi energy of the dots. The corresponding free energy change can be fitted to the photocatalytic activity using a modified Butler-Volmer equation for reaction kinetics. These findings establish a quantitative experimental basis for quantum-confinement-controlled proton reduction with semiconductor nanocrystals. Electrochemical data further indicate that proton reduction occurs at cadmium sites on the dots, and that charge separation in these nanocrystals is controlled by surface effects, not by space charge layers.
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Affiliation(s)
- Jing Zhao
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
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18
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Sun T, Zhang Z, Xiao J, Chen C, Xiao F, Wang S, Liu Y. Facile and green synthesis of palladium nanoparticles-graphene-carbon nanotube material with high catalytic activity. Sci Rep 2013; 3:2527. [PMID: 23982312 PMCID: PMC3755291 DOI: 10.1038/srep02527] [Citation(s) in RCA: 208] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 08/08/2013] [Indexed: 12/23/2022] Open
Abstract
We report a facile and green method to synthesize a new type of catalyst by coating Pd nanoparticles (NPs) on reduced graphene oxide (rGO)-carbon nanotube (CNT) nanocomposite. An rGO-CNT nanocomposite with three-dimensional microstructures was obtained by hydrothermal treatment of an aqueous dispersion of graphene oxide (GO) and CNTs. After the rGO-CNT composites have been dipped in K₂PdCl₄ solution, the spontaneous redox reaction between the GO-CNT and PdCl₄(2-) led to the formation of nanohybrid materials consisting rGO-CNT decorated with 4 nm Pd NPs, which exhibited excellent and stable catalytic activity: the reduction of 4-nitrophenol to 4-aminophenol using NaBH4 as a catalyst was completed in only 20 s at room temperature, even when the Pd content of the catalyst was 1.12 wt%. This method does not require rigorous conditions or toxic agents and thus is a rapid, efficient, and green approach to the fabrication of highly active catalysts.
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Affiliation(s)
- Tai Sun
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Zheye Zhang
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Junwu Xiao
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Chen Chen
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Fei Xiao
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Shuai Wang
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
- State Key Lab of Digital Manufacturing Equipment & Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Yunqi Liu
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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19
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Photonic efficiency and mechanism of photocatalytic molecular hydrogen production over platinized titanium dioxide from aqueous methanol solutions. Catal Today 2011. [DOI: 10.1016/j.cattod.2010.08.012] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Kamat PV, Tvrdy K, Baker DR, Radich EJ. Beyond Photovoltaics: Semiconductor Nanoarchitectures for Liquid-Junction Solar Cells. Chem Rev 2010; 110:6664-88. [DOI: 10.1021/cr100243p] [Citation(s) in RCA: 676] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Prashant V. Kamat
- Radiation Laboratory and Departments of Chemistry & Biochemistry and Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Kevin Tvrdy
- Radiation Laboratory and Departments of Chemistry & Biochemistry and Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - David R. Baker
- Radiation Laboratory and Departments of Chemistry & Biochemistry and Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Emmy J. Radich
- Radiation Laboratory and Departments of Chemistry & Biochemistry and Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
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21
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Xiong Z, Zhang LL, Ma J, Zhao XS. Photocatalytic degradation of dyes over graphene–gold nanocomposites under visible light irradiation. Chem Commun (Camb) 2010; 46:6099-101. [DOI: 10.1039/c0cc01259a] [Citation(s) in RCA: 480] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Kandiel TA, Dillert R, Bahnemann DW. Enhanced photocatalytic production of molecular hydrogen on TiO2 modified with Pt–polypyrrole nanocomposites. Photochem Photobiol Sci 2009; 8:683-90. [DOI: 10.1039/b817456c] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Nadagouda MN, Varma RS. Noble Metal Decoration and Alignment of Carbon Nanotubes in Carboxymethyl Cellulose. Macromol Rapid Commun 2008. [DOI: 10.1002/marc.200700616] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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24
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Wang CY, Pagel R, Bahnemann DW, Dohrmann JK. Quantum Yield of Formaldehyde Formation in the Presence of Colloidal TiO2-Based Photocatalysts: Effect of Intermittent Illumination, Platinization, and Deoxygenation. J Phys Chem B 2004. [DOI: 10.1021/jp048046s] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chuan-yi Wang
- Chemistry Department, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Institut für Chemie/Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany, and Institut für Technische Chemie, Universität Hannover, Callinstrasse 3, D-30167 Hannover, Germany
| | - Ronald Pagel
- Chemistry Department, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Institut für Chemie/Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany, and Institut für Technische Chemie, Universität Hannover, Callinstrasse 3, D-30167 Hannover, Germany
| | - Detlef W. Bahnemann
- Chemistry Department, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Institut für Chemie/Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany, and Institut für Technische Chemie, Universität Hannover, Callinstrasse 3, D-30167 Hannover, Germany
| | - Jürgen K. Dohrmann
- Chemistry Department, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Institut für Chemie/Physikalische und Theoretische Chemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany, and Institut für Technische Chemie, Universität Hannover, Callinstrasse 3, D-30167 Hannover, Germany
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25
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Anderson NA, Lian T. Ultrafast electron injection from metal polypyridyl complexes to metal-oxide nanocrystalline thin films. Coord Chem Rev 2004. [DOI: 10.1016/j.ccr.2004.03.029] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Haick H, Paz Y. "Dark" photocatalysis: the degradation of organic molecules anchored to dark microdomains of titanium dioxide. Chemphyschem 2003; 4:617-20. [PMID: 12836485 DOI: 10.1002/cphc.200200622] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hossam Haick
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
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27
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Choi HC, Shim M, Bangsaruntip S, Dai H. Spontaneous reduction of metal ions on the sidewalls of carbon nanotubes. J Am Chem Soc 2002; 124:9058-9. [PMID: 12149003 DOI: 10.1021/ja026824t] [Citation(s) in RCA: 347] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nanotube/nanoparticle hybrid structures are prepared by forming Au and Pt nanoparticles on the sidewalls of single-walled carbon nanotubes. Reducing agent or catalyst-free electroless deposition, which purely utilizes the redox potential difference between Au3+, Pt2+, and the carbon nanotube, is the main driving force for this reaction. It is also shown that carbon nanotubes act as a template for wire-like metal structures. The successful formation of the hybrid structures is monitored by atomic force microscopy (AFM) and electrical measurements.
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Affiliation(s)
- Hee Cheul Choi
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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28
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Chevaleevski O, Larina L. New trends in solar photovoltaics: From physics to chemistry. KOREAN J CHEM ENG 2001. [DOI: 10.1007/bf02698283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Asbury JB, Hao E, Wang Y, Ghosh HN, Lian T. Ultrafast Electron Transfer Dynamics from Molecular Adsorbates to Semiconductor Nanocrystalline Thin Films. J Phys Chem B 2001. [DOI: 10.1021/jp003485m] [Citation(s) in RCA: 555] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John B. Asbury
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Encai Hao
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Yongqiang Wang
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | | | - Tianquan Lian
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
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30
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Abstract
Incorporating nanocrystals into future electronic or optoelectronic devices will require a means of controlling charge-injection processes and an understanding of how the injected charges affect the properties of nanocrystals. We show that the optical properties of colloidal semiconductor nanocrystal quantum dots can be tuned by an electrochemical potential. The injection of electrons into the quantum-confined states of the nanocrystal leads to an electrochromic response, including a strong, size-tunable, midinfrared absorption corresponding to an intraband transition, a bleach of the visible interband exciton transitions, and a quench of the narrow band-edge photoluminescence.
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Affiliation(s)
- C Wang
- James Franck Institute, University of Chicago, Chicago, IL 60637, USA
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31
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The role of electrochemical impedance spectroscopy (EIS) in the global characterisation of the reduction kinetics of hexacyanoferrate on anodised titanium. Electrochim Acta 1999. [DOI: 10.1016/s0013-4686(99)00153-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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33
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Ghosh HN, Asbury JB, Lian T. Direct Observation of Ultrafast Electron Injection from Coumarin 343 to TiO2 Nanoparticles by Femtosecond Infrared Spectroscopy. J Phys Chem B 1998. [DOI: 10.1021/jp981806c] [Citation(s) in RCA: 162] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - John B. Asbury
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Tianquan Lian
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
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34
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Tan MX, Kenyon CN, Krüger O, Lewis NS. Behavior of Si Photoelectrodes under High Level Injection Conditions. 1. Steady-State Current−Voltage Properties and Quasi-Fermi Level Positions under Illumination. J Phys Chem B 1997. [DOI: 10.1021/jp962483s] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ming X. Tan
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - C. N. Kenyon
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Olaf Krüger
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Nathan S. Lewis
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
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35
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Krüger O, Kenyon CN, Tan MX, Lewis NS. Behavior of Si Photoelectrodes under High Level Injection Conditions. 2. Experimental Measurements and Digital Simulations of the Behavior of Quasi-Fermi Levels under Illumination and Applied Bias. J Phys Chem B 1997. [DOI: 10.1021/jp962484k] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Olaf Krüger
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - C. N. Kenyon
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Ming X. Tan
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
| | - Nathan S. Lewis
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125
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36
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Müller BR, Majoni S, Memming R, Meissner D. Particle Size and Surface Chemistry in Photoelectrochemical Reactions at Semiconductor Particles. J Phys Chem B 1997. [DOI: 10.1021/jp962749v] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- B. R. Müller
- Institut für Solarenergieforschung GmbH, Sokelantstraase 5, 30165 Hannover, FRG, Fachbereich Physik der Carl-von-Ossietzky-Universität, 26129 Oldenburg, FRG, and Forschungszetrum Jülich, Institute of Energy Process Engineering (IEV), 52425 Jülich, FRG
| | - S. Majoni
- Institut für Solarenergieforschung GmbH, Sokelantstraase 5, 30165 Hannover, FRG, Fachbereich Physik der Carl-von-Ossietzky-Universität, 26129 Oldenburg, FRG, and Forschungszetrum Jülich, Institute of Energy Process Engineering (IEV), 52425 Jülich, FRG
| | - R. Memming
- Institut für Solarenergieforschung GmbH, Sokelantstraase 5, 30165 Hannover, FRG, Fachbereich Physik der Carl-von-Ossietzky-Universität, 26129 Oldenburg, FRG, and Forschungszetrum Jülich, Institute of Energy Process Engineering (IEV), 52425 Jülich, FRG
| | - D. Meissner
- Institut für Solarenergieforschung GmbH, Sokelantstraase 5, 30165 Hannover, FRG, Fachbereich Physik der Carl-von-Ossietzky-Universität, 26129 Oldenburg, FRG, and Forschungszetrum Jülich, Institute of Energy Process Engineering (IEV), 52425 Jülich, FRG
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37
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Uhlendorf I, Reineke-Koch R, Memming R. Investigation of the Kinetics of Redox Reactions at GaAs Electrodes by Impedance Spectroscopy. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp952256a] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- I. Uhlendorf
- Institut für Solarenergieforschung, Sokelantstr.5, 30165 Hannover, FRG, Fachbereich Physik d. Universität Oldenburg, FRG
| | - R. Reineke-Koch
- Institut für Solarenergieforschung, Sokelantstr.5, 30165 Hannover, FRG, Fachbereich Physik d. Universität Oldenburg, FRG
| | - R. Memming
- Institut für Solarenergieforschung, Sokelantstr.5, 30165 Hannover, FRG, Fachbereich Physik d. Universität Oldenburg, FRG
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38
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Electrochemical features of electrodes modified with Multiple Nano Contacts (MNCs) from colloidal noble metal particles. Electrochim Acta 1995. [DOI: 10.1016/0013-4686(95)00033-b] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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