101
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Wu L, Eberhart M, Shan B, Nayak A, Brennaman MK, Miller AJM, Shao J, Meyer TJ. Stable Molecular Surface Modification of Nanostructured, Mesoporous Metal Oxide Photoanodes by Silane and Click Chemistry. ACS APPLIED MATERIALS & INTERFACES 2019; 11:4560-4567. [PMID: 30608131 DOI: 10.1021/acsami.8b17824] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Binding functional molecules to nanostructured mesoporous metal oxide surfaces provides a way to derivatize metal oxide semiconductors for applications in dye-sensitized photoelectrosynthesis cells (DSPECs). The commonly used anchoring groups, phosphonates and carboxylates, are unstable as surface links to oxide surfaces at neutral and high pH, leading to rapid desorption of appended molecules. A synthetically versatile molecular attachment strategy based on initial surface modification with a silyl azide followed by click chemistry is described here. It has been used for the stable installation of surface-bound metal complexes. The resulting surfaces are highly stabilized toward complex loss with excellent thermal, photochemical, and electrochemical stabilities. The procedure involves binding 3-azidopropyltrimethoxysilane (APTMS) to nanostructured mesoporous TiO2 or tin-doped indium oxide (ITO) electrodes by silane attachment followed by azide-terminated, Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reactions with an alkyne-derivatized ruthenium(II) polypyridyl complex. The chromophore-modified electrodes display enhanced photochemical and electrochemical stabilities compared to phosphonate surface binding with extended photoelectrochemical oxidation of hydroquinone for more than ∼6 h with no significant decay.
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Affiliation(s)
- Lei Wu
- College of Chemistry and Environment Engineering , Shenzhen University , Shenzhen , 518000 , China
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Michael Eberhart
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Bing Shan
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Animesh Nayak
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - M Kyle Brennaman
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Alexander J M Miller
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Jing Shao
- College of Chemistry and Environment Engineering , Shenzhen University , Shenzhen , 518000 , China
| | - Thomas J Meyer
- Department of Chemistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
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102
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Bae S, Jang JE, Lee HW, Ryu J. Tailored Assembly of Molecular Water Oxidation Catalysts on Photoelectrodes for Artificial Photosynthesis. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801328] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Sanghyun Bae
- Department of Energy Engineering; School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); 50 UNIST-gil Ulsan 44919 Republic of Korea
| | - Ji-Eun Jang
- Department of Energy Engineering; School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); 50 UNIST-gil Ulsan 44919 Republic of Korea
| | - Hyun-Wook Lee
- Department of Energy Engineering; School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); 50 UNIST-gil Ulsan 44919 Republic of Korea
| | - Jungki Ryu
- Department of Energy Engineering; School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); 50 UNIST-gil Ulsan 44919 Republic of Korea
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103
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The Effect of Chloride Anions on Charge Transfer in Dye-Sensitized Photoanodes for Water Splitting. Biomimetics (Basel) 2019; 4:biomimetics4010005. [PMID: 31105191 PMCID: PMC6477621 DOI: 10.3390/biomimetics4010005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 01/05/2019] [Accepted: 01/10/2019] [Indexed: 11/17/2022] Open
Abstract
The photoelectrochemical behavior of dye-sensitized photoelectrochemical cells based on a TiO2 layer sensitized with ruthenium components, including an absorber, ruthenium(II)bis(2,2'-bipyridine)([2,2'-bipyridine]-4,4'-diylbis(phosphonic acid)) dibromide (RuP), and a catalyst, ruthenium(II) tris(4-methylpyridine)(4-(4-(2,6-bis((l1-oxidanyl)carbonyl)pyridin-4-yl)phenyl) pyridine-2,6-dicarboxylic acid) (RuOEC), was investigated in the following water-based electrolyte configurations: KCl (pH ≈ 5), HCl (pH ≈ 3), ethylphoshonic acid (pH ≈ 3) with a different KCl concentration, and a standard phosphate buffer (pH ≈ 7). The rate of charge transfer on the photoanode's surface was found to increase in line with the increase in the concentration of chloride anions (Cl-) in the low pH electrolyte. This effect is discussed in the context of pH influence, ionic strength, and specific interaction, studied by cyclic voltammetry (CV) in dark conditions and upon illumination of the photoanodes. The correlations between photocurrent decay traces and CV studies were also observed.
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104
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Jiang W, Yang X, Li F, Zhang Q, Li S, Tong H, Jiang Y, Xia L. Immobilization of a molecular cobalt cubane catalyst on porous BiVO4via electrochemical polymerization for efficient and stable photoelectrochemical water oxidation. Chem Commun (Camb) 2019; 55:1414-1417. [DOI: 10.1039/c8cc08802k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A cobalt cubane catalyst was immobilized onto a BiVO4 electrode via electrochemical polymerization to fabricate hybrid photoanodes for stable photoelectrochemical water oxidation.
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Affiliation(s)
- Wenchao Jiang
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Xiaoxuan Yang
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Fei Li
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Qian Zhang
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Siyuan Li
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Haili Tong
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Yi Jiang
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Lixin Xia
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
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105
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Spies JA, Perets EA, Fisher KJ, Rudshteyn B, Batista VS, Brudvig GW, Schmuttenmaer CA. Collaboration between experiment and theory in solar fuels research. Chem Soc Rev 2019; 48:1865-1873. [DOI: 10.1039/c8cs00819a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As the challenges in science increase in scope and interdisciplinarity, collaboration becomes increasingly important.
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Affiliation(s)
- Jacob A. Spies
- Department of Chemistry
- Yale University
- New Haven
- USA
- Energy Sciences Institute, Yale University
| | | | - Katherine J. Fisher
- Department of Chemistry
- Yale University
- New Haven
- USA
- Energy Sciences Institute, Yale University
| | - Benjamin Rudshteyn
- Department of Chemistry
- Yale University
- New Haven
- USA
- Energy Sciences Institute, Yale University
| | - Victor S. Batista
- Department of Chemistry
- Yale University
- New Haven
- USA
- Energy Sciences Institute, Yale University
| | - Gary W. Brudvig
- Department of Chemistry
- Yale University
- New Haven
- USA
- Energy Sciences Institute, Yale University
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106
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Yang T, Yin H, Gao LH, Wang KZ, Yan D. Recent advances in electrodes modified with ruthenium complexes for electrochemical and photoelectrochemical water oxidation. ADVANCES IN INORGANIC CHEMISTRY 2019. [DOI: 10.1016/bs.adioch.2019.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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107
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Macchioni A. The Middle-Earth between Homogeneous and Heterogeneous Catalysis in Water Oxidation with Iridium. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800798] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alceo Macchioni
- Department of Chemistry; Biology and Biotechnology; University of Perugia; Via Elce di Sotto 8 06123 - Perugia Italy
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108
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Nauth AM, Schechtel E, Dören R, Tremel W, Opatz T. TiO2 Nanoparticles Functionalized with Non-innocent Ligands Allow Oxidative Photocyanation of Amines with Visible/Near-Infrared Photons. J Am Chem Soc 2018; 140:14169-14177. [DOI: 10.1021/jacs.8b07539] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Alexander M. Nauth
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Eugen Schechtel
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - René Dören
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Till Opatz
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
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109
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Tang JH, Cai Z, Yan D, Tang K, Shao JY, Zhan C, Wang D, Zhong YW, Wan LJ, Yao J. Molecular Quadripod as a Noncovalent Interfacial Coupling Reagent for Forming Immobilized Coordination Assemblies. J Am Chem Soc 2018; 140:12337-12340. [DOI: 10.1021/jacs.8b07777] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jian-Hong Tang
- Beijing National Research Center of Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhenfeng Cai
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dong Yan
- Beijing National Research Center of Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kun Tang
- Beijing National Research Center of Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiang-Yang Shao
- Beijing National Research Center of Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Chuanlang Zhan
- Beijing National Research Center of Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Dong Wang
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu-Wu Zhong
- Beijing National Research Center of Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li-Jun Wan
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiannian Yao
- Beijing National Research Center of Molecular Sciences, Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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110
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New Insights into the Configurations of Lead(II)-Benzohydroxamic Acid Coordination Compounds in Aqueous Solution: A Combined Experimental and Computational Study. MINERALS 2018. [DOI: 10.3390/min8090368] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Novel collector lead(II)-benzohydroxamic acid (Pb(II)–BHA) complexes in aqueous solution were characterized by using experimental approaches, including Ultraviolet-visible (UV-Vis) spectroscopy and electrospray ionization-mass spectrometry (ESI-MS), as well as first-principle density functional theory (DFT) calculations with consideration for solvation effects. The Job plot delineated that a single coordinated Pb(BHA)+ should be formed first, and that the higher coordination number complexes can be formed subsequently. Moreover, the Pb(II)–BHA species can aggregate with each other to form complicated structures, such as Pb(BHA)2 or highly complicated complexes. ESI-MS results validated the existence of Pb-(BHA)n=1,2 under different solution pH values. Further, the first-principles calculations suggested that Pb(BHA)+ should be the most stable structure, and the Pb atom in Pb(BHA)+ will act as an active site to attack nucleophiles. These findings are meaningful to further illustrate the adsorption mechanism of Pb(II)–BHA complexes, and are helpful for developing new reagents in mineral processing.
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111
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Ahsan HM, Breedlove BK, Piangrawee S, Mian MR, Fetoh A, Cosquer G, Yamashita M. Enhancement of electrocatalytic abilities for reducing carbon dioxide: functionalization with a redox-active ligand-coordinated metal complex. Dalton Trans 2018; 47:11313-11316. [PMID: 30058663 DOI: 10.1039/c8dt02288g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A binary system consisting of a ditopic planar pseudo-pincer ligand (qlca = quinoline-2-carbaldehyde (pyridine-2-carbonyl) hydrazone) coordinated to two metal centres affording [{Ru(bpy)2}(μ-qlca)NiCl2]Cl·4H2O·CH3OH (2) (bpy = 2,2'-bipyridine) is reported. The Ni2+ moiety acts as the electrocatalytic active site for CO2 reduction to CO. The turnover frequency (TOF) increased from 0.83 s-1 for [Ni(qlca)Cl2] (3) to 120 s-1 for 2, and the overpotential is 350 mV less than that for 3 due to the electronic influence of the {Ru(bpy)2}2+ moiety on the catalytic active site.
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Affiliation(s)
- Habib Md Ahsan
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai 980-8578, Japan.
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112
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Reith L, Lienau K, Cook DS, Moré R, Walton RI, Patzke GR. Monitoring the Hydrothermal Growth of Cobalt Spinel Water Oxidation Catalysts: From Preparative History to Catalytic Activity. Chemistry 2018; 24:18424-18435. [DOI: 10.1002/chem.201801565] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Lukas Reith
- Department of ChemistryUniversity of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Karla Lienau
- Department of ChemistryUniversity of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Daniel S. Cook
- Department of ChemistryUniversity of Warwick Coventry CV4 7AL UK
| | - René Moré
- Department of ChemistryUniversity of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
| | | | - Greta R. Patzke
- Department of ChemistryUniversity of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
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113
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Dye-sensitized photoelectrochemical water oxidation through a buried junction. Proc Natl Acad Sci U S A 2018; 115:6946-6951. [PMID: 29915092 DOI: 10.1073/pnas.1804728115] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Water oxidation has long been a challenge in artificial photosynthetic devices that convert solar energy into fuels. Water-splitting dye-sensitized photoelectrochemical cells (WS-DSPECs) provide a modular approach for integrating light-harvesting molecules with water-oxidation catalysts on metal-oxide electrodes. Despite recent progress in improving the efficiency of these devices by introducing good molecular water-oxidation catalysts, WS-DSPECs have poor stability, owing to the oxidation of molecular components at very positive electrode potentials. Here we demonstrate that a solid-state dye-sensitized solar cell (ss-DSSC) can be used as a buried junction for stable photoelectrochemical water splitting. A thin protecting layer of TiO2 grown by atomic layer deposition (ALD) stabilizes the operation of the photoanode in aqueous solution, although as a solar cell there is a performance loss due to increased series resistance after the coating. With an electrodeposited iridium oxide layer, a photocurrent density of 1.43 mA cm-2 was observed in 0.1 M pH 6.7 phosphate solution at 1.23 V versus reversible hydrogen electrode, with good stability over 1 h. We measured an incident photon-to-current efficiency of 22% at 540 nm and a Faradaic efficiency of 43% for oxygen evolution. While the potential profile of the catalyst layer suggested otherwise, we confirmed the formation of a buried junction in the as-prepared photoelectrode. The buried junction design of ss-DSSs adds to our understanding of semiconductor-electrocatalyst junction behaviors in the presence of a poor semiconducting material.
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114
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Hesari M, Mao X, Chen P. Charge Carrier Activity on Single-Particle Photo(electro)catalysts: Toward Function in Solar Energy Conversion. J Am Chem Soc 2018; 140:6729-6740. [DOI: 10.1021/jacs.8b04039] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mahdi Hesari
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Xianwen Mao
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Peng Chen
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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115
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Wu W, Wei C, Lin X, Xu Q. Controlled Assembly of Porphyrin-MoS 2 Composite Nanosheets for Enhanced Photoelectrochemical Performance. Chem Asian J 2018. [PMID: 29528564 DOI: 10.1002/asia.201800290] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
As a promising non-precious metal photoelectrochemical (PEC) catalyst, MoS2 exhibits high electrocatalytic activity and stability, while the weak light absorption efficiency and low photoresponse current limit its practical application. Herein, a facile co-assembly approach is proposed to construct porphyrin-MoS2 composite photoelectrocatalysts. The as-prepared photoelectrocatalysts show a significantly enhanced photocurrent response as high as 16 μA cm-2 , which is about 2 times higher than that of bare MoS2 . Furthermore, the obtained porphyrin-MoS2 catalysts exhibit excellent durability when tested for 23000 s, thus providing a useful strategy for the design of highly efficient dye-sensitized PEC catalysts.
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Affiliation(s)
- Wenzhuo Wu
- College of Materials Science and Engineering, Zhengzhou University, China
| | - Cong Wei
- College of Materials Science and Engineering, Zhengzhou University, China
| | - Xiangcheng Lin
- College of Materials Science and Engineering, Zhengzhou University, China
| | - Qun Xu
- College of Materials Science and Engineering, Zhengzhou University, China
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116
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Esarey SL, Bartlett BM. pH-Dependence of Binding Constants and Desorption Rates of Phosphonate- and Hydroxamate-Anchored [Ru(bpy) 3] 2+ on TiO 2 and WO 3. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4535-4547. [PMID: 29601204 DOI: 10.1021/acs.langmuir.8b00263] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The binding constants and rate constants for desorption of the modified molecular dye [Ru(bpy)3]2+ anchored by either phosphonate or hydroxamate on the bipyridine ligand to anatase TiO2 and WO3 have been measured. In aqueous media at pH 1-10, repulsive electrostatic interactions between the negatively charged anchor and the negatively charged surface govern phosphonate desorption under neutral and basic conditions for TiO2 anatase due to the high acidity of phosphonic acid (p Ka,4 = 5.1). In contrast, the lower acidity of hydroxamate (p Ka,1 = 6.5, p Ka,2 = 9.1) leads to little change in adsorption/desorption properties as a function of pH from 1 to 7. The binding constant for hydroxamate is 103 in water, independent of pH in this range. These results are true for WO3 as well, but are not reported at pH > 4 due to its Arrhenius acidity. Kinetics for desorption as a function of pH are reported, with a proposed mechanism for phosphonate desorption at high pH being the electrostatic repulsion of negative charges between the surface and the anionic anchor. Further, the hydroxamic acid anchor itself is likely the site of quasi-reversible redox activity in [Ru(bpy)2(2,2'-bpy-4,4'-(C(O)N(OH))2)]2+, which does not lead to any measurable deterioration of the complex within 2 h of dark cyclic voltammogram scans in aqueous media. These results posit phosphonate as the preferred anchoring group under acidic conditions and hydroxamate for neutral/basic conditions.
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Affiliation(s)
- Samuel L Esarey
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
| | - Bart M Bartlett
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
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117
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Bangle R, Sampaio RN, Troian-Gautier L, Meyer GJ. Surface Grafting of Ru(II) Diazonium-Based Sensitizers on Metal Oxides Enhances Alkaline Stability for Solar Energy Conversion. ACS APPLIED MATERIALS & INTERFACES 2018; 10:3121-3132. [PMID: 29272096 DOI: 10.1021/acsami.7b16641] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The electrografting of [Ru(ttt)(tpy-C6H4-N2+)]3+, where "ttt" is 4,4',4″-tri-tert-butyl-2,2':6',2″-terpyridine, was investigated on several wide band gap metal oxide surfaces (TiO2, SnO2, ZrO2, ZnO, In2O3:Sn) and compared to structurally analogous sensitizers that differed only by the anchoring group, i.e., -PO3H2 and -COOH. An optimized procedure for diazonium electrografting to semiconductor metal oxides is presented that allowed surface coverages that ranged between 4.7 × 10-8 and 10.6 × 10-8 mol cm-2 depending on the nature of the metal oxide. FTIR analysis showed the disappearance of the diazonium stretch at 2266 cm-1 after electrografting. XPS analysis revealed a characteristic peak of Ru 3d at 285 eV as well as a peak at 531.6 eV that was attributed to O 1s in Ti-O-C bonds. Photocurrents were measured to assess electron injection efficiency of these modified surfaces. The electrografted sensitizers exhibited excellent stability across a range of pHs spanning from 1 to 14, where classical binding groups such as carboxylic and phosphonic derivatives were hydrolyzed.
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Affiliation(s)
- Rachel Bangle
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Renato N Sampaio
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Ludovic Troian-Gautier
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Gerald J Meyer
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
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118
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Ge A, Rudshteyn B, Zhu J, Maurer RJ, Batista VS, Lian T. Electron-Hole-Pair-Induced Vibrational Energy Relaxation of Rhenium Catalysts on Gold Surfaces. J Phys Chem Lett 2018; 9:406-412. [PMID: 29227669 DOI: 10.1021/acs.jpclett.7b02885] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A combination of time-resolved vibrational spectroscopy and density functional theory techniques have been applied to study the vibrational energy relaxation dynamics of the Re(4,4'-dicyano-2,2'-bipyridine)(CO)3Cl (Re(CO)3Cl) catalyst for CO2 to CO conversion bound to gold surfaces. The kinetics of vibrational relaxation exhibits a biexponential decay including an ultrafast initial relaxation and complete recovery of the ground vibrational state. Ab initio molecular dynamics simulations and time-dependent perturbation theory reveal the former to be due to vibrational population exchange between CO stretching modes and the latter to be a combination of intramolecular vibrational relaxation (IVR) and electron-hole pair (EHP)-induced energy transfer into the gold substrate. EHP-induced energy transfer from the Re(CO)3Cl adsorbate into the gold surface occurs on the same time scale as IVR of Re(CO)3Cl in aprotic solvents. Therefore, it is expected to be particularly relevant to understanding the reduced catalytic activity of the homogeneous catalyst when anchored to a metal surface.
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Affiliation(s)
- Aimin Ge
- Department of Chemistry, Emory University , Atlanta, Georgia 30322, United States
| | - Benjamin Rudshteyn
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
- Yale Energy Sciences Institute, Yale University , West Haven, Connecticut 06516, United States
| | - Jingyi Zhu
- Department of Chemistry, Emory University , Atlanta, Georgia 30322, United States
| | - Reinhard J Maurer
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Victor S Batista
- Department of Chemistry, Yale University , New Haven, Connecticut 06520, United States
- Yale Energy Sciences Institute, Yale University , West Haven, Connecticut 06516, United States
| | - Tianquan Lian
- Department of Chemistry, Emory University , Atlanta, Georgia 30322, United States
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119
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Won DI, Lee JS, Ba Q, Cho YJ, Cheong HY, Choi S, Kim CH, Son HJ, Pac C, Kang SO. Development of a Lower Energy Photosensitizer for Photocatalytic CO2 Reduction: Modification of Porphyrin Dye in Hybrid Catalyst System. ACS Catal 2018. [DOI: 10.1021/acscatal.7b02961] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong-Il Won
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Jong-Su Lee
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Qiankai Ba
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Yang-Jin Cho
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Ha-Yeon Cheong
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Sunghan Choi
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Chul Hoon Kim
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Ho-Jin Son
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Chyongjin Pac
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Sang Ook Kang
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
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120
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Jia HL, Peng ZJ, Chen YC, Huang CY, Guan MY. Highly efficient stereoscopic phenothiazine dyes with different anchors for dye-sensitized solar cells. NEW J CHEM 2018. [DOI: 10.1039/c8nj04164d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
For DSSCs based on stereoscopic phenothiazine dyes, JA6 with a cyanoacrylic acid anchor shows the highest PCE of 7.34%.
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Affiliation(s)
- Hai-Lang Jia
- School of Chemical and Environmental Engineering
- Institute of Advanced Functional Materials for Energy
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Zhi-Jie Peng
- School of Chemical and Environmental Engineering
- Institute of Advanced Functional Materials for Energy
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Yu-Chao Chen
- School of Chemical and Environmental Engineering
- Institute of Advanced Functional Materials for Energy
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Cheng-Yan Huang
- Department of Chemistry
- School of Environmental Science and Engineering
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control
- Nanjing University of Information Science & Technology
- Nanjing 210044
| | - Ming-Yun Guan
- School of Chemical and Environmental Engineering
- Institute of Advanced Functional Materials for Energy
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
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121
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Lebedev D, Pineda-Galvan Y, Tokimaru Y, Fedorov A, Kaeffer N, Copéret C, Pushkar Y. The Key Ru V=O Intermediate of Site-Isolated Mononuclear Water Oxidation Catalyst Detected by in Situ X-ray Absorption Spectroscopy. J Am Chem Soc 2017; 140:451-458. [PMID: 29219306 DOI: 10.1021/jacs.7b11388] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Improvement of the oxygen evolution reaction (OER) is a challenging step toward the development of sustainable energy technologies. Enhancing the OER rate and efficiency relies on understanding the water oxidation mechanism, which entails the characterization of the reaction intermediates. Very active Ru-bda type (bda is 2,2'-bipyridine-6,6'-dicarboxylate) molecular OER catalysts are proposed to operate via a transient 7-coordinate RuV═O intermediate, which so far has never been detected due to its high reactivity. Here we prepare and characterize a well-defined supported Ru(bda) catalyst on porous indium tin oxide (ITO) electrode. Site isolation of the catalyst molecules on the electrode surface allows trapping of the key 7-coordinate RuV═O intermediate at potentials above 1.34 V vs NHE at pH 1, which is characterized by electron paramagnetic resonance and in situ X-ray absorption spectroscopies. The in situ extended X-ray absorption fine structure analysis shows a Ru═O bond distance of 1.75 ± 0.02 Å, consistent with computational results. Electrochemical studies and density functional theory calculations suggest that the water nucleophilic attack on the surface-bound RuV═O intermediate (O-O bond formation) is the rate limiting step for OER catalysis at low pH.
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Affiliation(s)
- Dmitry Lebedev
- ETH Zürich , Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Yuliana Pineda-Galvan
- Purdue University , Department of Physics and Astronomy, West Lafayette, Indiana 47907, United States
| | - Yuki Tokimaru
- ETH Zürich , Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Alexey Fedorov
- ETH Zürich , Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Nicolas Kaeffer
- ETH Zürich , Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Christophe Copéret
- ETH Zürich , Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland
| | - Yulia Pushkar
- Purdue University , Department of Physics and Astronomy, West Lafayette, Indiana 47907, United States
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122
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Odrobina J, Scholz J, Risch M, Dechert S, Jooss C, Meyer F. Chasing the Achilles’ Heel in Hybrid Systems of Diruthenium Water Oxidation Catalysts Anchored on Indium Tin Oxide: The Stability of the Anchor. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01883] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jann Odrobina
- University of Goettingen, Institute of Inorganic
Chemistry, Tammannstraße
4, D-37077 Göttingen, Germany
| | - Julius Scholz
- University of Goettingen, Institute of Materials
Physics, Friedrich-Hund-Platz
1, D-37077 Göttingen, Germany
| | - Marcel Risch
- University of Goettingen, Institute of Materials
Physics, Friedrich-Hund-Platz
1, D-37077 Göttingen, Germany
| | - Sebastian Dechert
- University of Goettingen, Institute of Inorganic
Chemistry, Tammannstraße
4, D-37077 Göttingen, Germany
| | - Christian Jooss
- University of Goettingen, Institute of Materials
Physics, Friedrich-Hund-Platz
1, D-37077 Göttingen, Germany
- University of Goettingen, International Center
for Advanced Studies of Energy Conversion (ICASEC), D-37077 Göttingen, Germany
| | - Franc Meyer
- University of Goettingen, Institute of Inorganic
Chemistry, Tammannstraße
4, D-37077 Göttingen, Germany
- University of Goettingen, International Center
for Advanced Studies of Energy Conversion (ICASEC), D-37077 Göttingen, Germany
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123
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Zhang Y, Guo H, Weng W, Fu ML. The surface plasmon resonance, thermal, support and size effect induced photocatalytic activity enhancement of Au/reduced graphene oxide for selective oxidation of benzylic alcohols. Phys Chem Chem Phys 2017; 19:31389-31398. [DOI: 10.1039/c7cp05378a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The SPR, thermal, support, and size effects of Au/RGO are demonstrated to play an important role in enhancing the photocatalytic activity.
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Affiliation(s)
- Yanhui Zhang
- College of Chemistry and Environment
- Fujian Province Key Laboratory of Morden Analytical Science and Separation Technology
- Minnan Normal University
- Zhangzhou
- P. R. China
| | - Hongxu Guo
- College of Chemistry and Environment
- Fujian Province Key Laboratory of Morden Analytical Science and Separation Technology
- Minnan Normal University
- Zhangzhou
- P. R. China
| | - Wen Weng
- College of Chemistry and Environment
- Fujian Province Key Laboratory of Morden Analytical Science and Separation Technology
- Minnan Normal University
- Zhangzhou
- P. R. China
| | - Ming-Lai Fu
- CAS Key Laboratory of Urban Pollutant Conversion
- Institute of Urban Environment
- Chinese Academy of Science
- Xiamen
- P. R. China
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