1
|
Puthiyaparambath MF, Samuel JE, Chatanathodi R. Tailoring surface morphology on anatase TiO 2 supported Au nanoclusters: implications for O 2 activation. NANOSCALE ADVANCES 2024:d4na00744a. [PMID: 39359353 PMCID: PMC11441460 DOI: 10.1039/d4na00744a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2024] [Accepted: 09/17/2024] [Indexed: 10/04/2024]
Abstract
Strong interaction between the support surface and metal clusters activates the adsorbed molecules at the metal cluster-support interface. Using plane-wave DFT calculations, we precisely model the interface between anatase TiO2 and small Au nanoclusters. Our study focusses on the adsorption and activation of oxygen molecules on anatase TiO2, considering the influence of oxygen vacancies and steps on the surface. We find that the plane (101) and the stepped (103) surfaces do not support O2 activation, but the presence of oxygen vacancies results in strong adsorption and O-O bond length elongation. Modifying the TiO2 surface with supported small Au n nanoclusters (n = 3-5) also significantly enhances O2 adsorption and stretches the O-O bond. We observe that manipulating the cluster orientation through discrete rotations results in improved O2 adsorption and promotes charge transfer from the surface to the molecule. We propose that the orientation of the supported cluster may be manipulated by making the cluster adsorb at the step-edge of (103) TiO2. This results in activated O2 at the cluster-support interface, with a peroxide-range bond length and a low barrier for dissociation. Our modeling demonstrates a straightforward means of exploiting the interface morphology for O2 activation under low precious metal loading, which has important implications for electrocatalytic oxidation reactions and the rational design of supported catalysts.
Collapse
Affiliation(s)
| | - Julian Ezra Samuel
- Department of Physics, National Institute of Technology Calicut Calicut Kerala 673601 India
| | - Raghu Chatanathodi
- Department of Physics, National Institute of Technology Calicut Calicut Kerala 673601 India
| |
Collapse
|
2
|
Adams J, Chen H, Ricciardulli T, Vijayaraghavan S, Sampath A, Flaherty DW. Distinct Site Motifs Activate O 2 and H 2 on Supported Au Nanoparticles in Liquid Water. ACS Catal 2024; 14:3248-3265. [PMID: 38449529 PMCID: PMC10913054 DOI: 10.1021/acscatal.3c05072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 03/08/2024]
Abstract
Au nanoparticles catalyze the activation and conversion of small molecules with rates and kinetic barriers that depend on the dimensions of the nanoparticle, composition of the support, and presence of catalytically culpable water molecules that solvate these interfaces. Here, molecular interpretations of steady-state rate measurements, kinetic isotope effects, and structural characterizations reveal how the interface of Au nanoparticles, liquid water, and metal oxide supports mediate the kinetically relevant activation of H2 and sequential reduction of O2-derived intermediates during the formation of H2O2 and H2O. Rates of H2 consumption are 10-100 fold greater on Au nanoparticles supported on metal oxides (e.g., titania) compared to more inert and hydrophobic materials (carbon, boron nitride). Similarly, Au nanoparticles on reducible and Lewis acidic supports (e.g., lanthana) bind dioxygen intermediates more strongly and present lower barriers (<22 kJ mol-1) for O-O bond dissociation than inert interfaces formed with silica (>70 kJ mol-1). Selectivities for H2O2 formation increase significantly as the diameters of the Au nanoparticles increase because differences in nanoparticle size change the relative fractions of exposed sites that exist at Au-support interfaces. In contrast, site-normalized rates and barriers for H2 activation depend weakly on the size of Au nanoparticles and the associated differences in active site motifs. These findings suggest that H2O aids the activation of H2 at sites present across all surface Au atoms when nanoparticles are solvated by water. However, molecular O2 preferentially binds and dissociates at Au-support interfaces, leading to greater structure sensitivity for barriers of O-O dissociation across different support identities and sizes of Au nanoparticles. These insights differ from prior knowledge from studies of gas-phase reactions of H2 and O2 upon Au nanoparticle catalysts within dilute vapor pressures of water (10-4 to 0.1 kPa H2O), in which catalysis occurs at the perimeter of the Au-support interface. In contrast, contacting Au catalysts with liquid water (55.5 M H2O) expands catalysis to all surface Au atoms and enables appreciable H2O2 formation.
Collapse
Affiliation(s)
- Jason
S. Adams
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
| | - Haoyu Chen
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
- School
of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Tomas Ricciardulli
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
| | - Sucharita Vijayaraghavan
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
- School
of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Abinaya Sampath
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
| | - David W. Flaherty
- Department
of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Champaign, Illinois 61801, United States
- School
of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| |
Collapse
|
3
|
Lau K, Giera B, Barcikowski S, Reichenberger S. The multivariate interaction between Au and TiO 2 colloids: the role of surface potential, concentration, and defects. NANOSCALE 2024; 16:2552-2564. [PMID: 38221893 DOI: 10.1039/d3nr06205h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
The established DLVO theory explains colloidal stability by the electrostatic repulsion between electrical double layers. While the routinely measured zeta potential can estimate the charges of double layers, it is only an average surface property which might deviate from the local environment. Moreover, other factors such as the ionic strength and the presence of defects should also be considered. To investigate this multivariate problem, here we model the interaction between a negatively charged Au particle and a negatively charged TiO2 surface containing positive/neutral defects (e.g. surface hydroxyls) based on the finite element method, over 6000 conditions of these 6 parameters: VPart (particle potential), VSurf (surface potential), VDef (defect potential), DD (defect density), Conc (salt concentration), and R (particle radius). Using logistic regression, the relative importance of these factors is determined: VSurf > VPart > DD > Conc > R > VDef, which agrees with the conventional wisdom that the surface (and zeta) potential is indeed the most decisive descriptor for colloidal interactions, and the salt concentration is also important for charge screening. However, when defects are present, it appears that their density is more influential than their potential. To predict the fate of interactions more confidently with all the factors, we train a support vector machine (SVM) with the simulation data, which achieves 97% accuracy in determining whether adsorption is favorable on the support. The trained SVM including a graphical user interface for querying the prediction is freely available online for comparing with other materials and models. We anticipate that our model can stimulate further colloidal studies examining the importance of the local environment, while simultaneously considering multiple factors.
Collapse
Affiliation(s)
- Kinran Lau
- Technical Chemistry I, University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE), Essen, Germany.
| | - Brian Giera
- Center for Engineered Materials and Manufacturing, Lawrence Livermore National Laboratory, California, USA
| | - Stephan Barcikowski
- Technical Chemistry I, University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE), Essen, Germany.
| | - Sven Reichenberger
- Technical Chemistry I, University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE), Essen, Germany.
| |
Collapse
|
4
|
Zhu Q, Adachi Y, Wen H, Xu R, Cheng Z, Sugawara Y, Li Y. Charge State of Au Atoms on an Oxidized Rutile TiO 2(110) Surface by AFM/KPFM at 78 K. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1358-1363. [PMID: 38174984 DOI: 10.1021/acs.langmuir.3c02999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The charge state of noble metal atoms on a semiconductor surface is an important factor in surface catalysis. In this study, Au atoms were deposited on the rutile TiO2(110) surface to characterize its charge properties using atomic force microscopy with Kelvin probe force microscopy at 78 K. Au single atoms, dimers, and trimers at different sites on the surface were investigated. Positively charged Au atoms were verified at oxygen sites, while negatively charged Au atoms were found near oxygen vacancy sites. Furthermore, the charge states of small Au nanoclusters were clarified. Understanding the charge states of Au atoms is significant for identifying their efficient catalytic effects in surface catalysis.
Collapse
Affiliation(s)
- Qiang Zhu
- Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Yuuki Adachi
- Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Huanfei Wen
- Key Laboratory of Instrumentation Science and Dynamic Measurement, School of Instrument and Electronics, North University of China, Taiyuan, Shanxi 030051, People's Republic of China
| | - Rui Xu
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of China, Beijing 100872, People's Republic of China
| | - Zhihai Cheng
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, Department of Physics, Renmin University of China, Beijing 100872, People's Republic of China
| | - Yasuhiro Sugawara
- Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Yanjun Li
- Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan
| |
Collapse
|
5
|
Gregory JW, Gong Y, Han Y, Huband S, Walton RI, Hessel V, Rebrov EV. Au/TiO2 coatings for photocatalytic reduction of 4-nitrophenol to 4-aminophenol with green light. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
|
6
|
Chen JJ, Liu QY, Wang SD, Li XN, He SG. Catalytic NO Reduction by NO Pre-Adsorbed RhCeO 2 NO - Clusters. Chemphyschem 2023; 24:e202200743. [PMID: 36308426 DOI: 10.1002/cphc.202200743] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Indexed: 11/11/2022]
Abstract
A fundamental understanding on the dynamically structural evolution of catalysts induced by reactant gases under working conditions is challenging but pivotal in catalyst design. Herein, in combination with state-of-the-art mass spectrometry for cluster reactions, cryogenic photoelectron imaging spectroscopy, and quantum-chemical calculations, we identified that NO adsorption on rhodium-cerium bimetallic oxide cluster RhCeO2 - can create a Ce3+ ion in product RhCeO2 NO- that serves as the starting point to trigger the catalysis of NO reduction by CO. Theoretical calculations substantiated that the reduction of another two NO molecules into N2 O takes place exclusively on the Ce3+ ion while Rh behaves like a promoter to buffer electrons and cooperates with Ce3+ to drive NO reduction. Our finding demonstrates the importance of NO in regulating the catalytic behavior of Rh under reaction conditions and provides much-needed insights into the essence of NO reduction over Rh/CeO2 , one of the most efficient components in three-way catalysts for NOx removal.
Collapse
Affiliation(s)
- Jiao-Jiao Chen
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,Beijing National Laboratory for Molecular Sciences and CAS Research/Education, Centre of Excellence in Molecular Sciences, Beijing, 100190, P. R. China
| | - Qing-Yu Liu
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,Beijing National Laboratory for Molecular Sciences and CAS Research/Education, Centre of Excellence in Molecular Sciences, Beijing, 100190, P. R. China
| | - Si-Dun Wang
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,School of Chemistry and Chemical Engineering, South China University of Technology Tianhe District, Guangzhou, 510641, China.,Beijing, 100049, China
| | - Xiao-Na Li
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,Beijing National Laboratory for Molecular Sciences and CAS Research/Education, Centre of Excellence in Molecular Sciences, Beijing, 100190, P. R. China
| | - Sheng-Gui He
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,Beijing National Laboratory for Molecular Sciences and CAS Research/Education, Centre of Excellence in Molecular Sciences, Beijing, 100190, P. R. China
| |
Collapse
|
7
|
Li XN, He SG. Gas-phase reactions driven by polarized metal-metal bonding in atomic clusters. Phys Chem Chem Phys 2023; 25:4444-4459. [PMID: 36723009 DOI: 10.1039/d2cp05148f] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Multimetallic catalysts exhibit great potential in the activation and catalytic transformation of small molecules. The polarized metal-metal bonds have been gradually recognized to account for the reactivity of multimetallic catalysts due to the synergistic effect of different metal centers. Gas-phase reactions on atomic clusters that compositionally resemble the active sites on related condensed-phase catalysts provide a widely accepted strategy to clarify the nature of polarized metal-metal bonds and the mechanistic details of elementary steps involved in the catalysis driven by this unique chemical bonding. This perspective review concerns the progress in the fundamental understanding of industrially and environmentally important reactions that are closely related to the polarized metal-metal bonds in clusters at a strictly molecular level. The following topics have been summarized and discussed: (1) catalytic CO oxidation with O2, H2O, and NO as oxidants (2) and the activation of other inert molecules (e.g., CH4, CO2, and N2) mediated with clusters featuring polarized metal-metal bonding. It turns out that the findings in the gas phase parallel the catalytic behaviors of condensed-phase catalysts and the knowledge can prove to be essential in inspiring future design of promising catalysts.
Collapse
Affiliation(s)
- Xiao-Na Li
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. .,Beijing National Laboratory for Molecular Sciences and CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, China
| | - Sheng-Gui He
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. .,University of Chinese Academy of Sciences, Beijing 100049, China.,Beijing National Laboratory for Molecular Sciences and CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, China
| |
Collapse
|
8
|
Wang Y, Zhang T, Zhao Y, Lv T, Liu W, Liu X. Catalytic degradation of methylene blue by biosynthesized Au nanoparticles on titanium dioxide (Au@TiO 2). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:12307-12316. [PMID: 36107299 DOI: 10.1007/s11356-022-22945-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
The degradation of methylene blue is a critical procedure in its wastewater remediation and thus has inspired wide catalysis research with semiconductors such as titanium dioxide (TiO2) and rare metals such as gold (Au). In this study, we report bacterial cells assisting biosynthesis for Au@TiO2 as an efficient catalyst for the catalytic degradation of methylene blue. Multiple complementary characterization for bio-Aux@TiO2 evidenced the evenly distributed Au nanoparticles (NPs) on the bio-TiO2 layers. Meanwhile, bio-Au2@TiO2 displayed the superior catalytic activity in the degradation of methylene blue with the highest kinetics constant (kapp) value of 0.195 min-1. In addition, bio-Au2@TiO2 keeps stable catalytic activity for up to 10 cycles. The origin of the catalytic activity was investigated by the hydroxyl radical fluorescence quantitative analysis and optical band gap analysis. In the bio-Au2@TiO2 catalytic system, Au NPs decreased the band gap energy of TiO2 and enabled the generation of abundant photogeneration hydroxyl radicals, resulting in an enhanced photocatalytic activity. Our microbial synthesized bio-TiO2 and bio-Aux@TiO2 study would be useful for developing green synthesis catalyst technology.
Collapse
Affiliation(s)
- Yanan Wang
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, 300191, Tianjin, China
- Nanjing Municipal Design and Research Institute Co., Ltd, Nanjing, 210008, China
| | - Tieliang Zhang
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, 300191, Tianjin, China
| | - Yujie Zhao
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, 300191, Tianjin, China
| | - Tong Lv
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, 300191, Tianjin, China
| | - Wenjing Liu
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, 300191, Tianjin, China.
| | - Xiaowei Liu
- Key Laboratory for Environmental Factors Control of Agro-product Quality Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, 300191, Tianjin, China
| |
Collapse
|
9
|
Doronin SV, Dokhlikova NV, Grishin MV. Descriptor of catalytic activity nanoparticles surface: Atomic and molecular hydrogen on gold. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
10
|
Mai H, Le TC, Chen D, Winkler DA, Caruso RA. Machine Learning for Electrocatalyst and Photocatalyst Design and Discovery. Chem Rev 2022; 122:13478-13515. [PMID: 35862246 DOI: 10.1021/acs.chemrev.2c00061] [Citation(s) in RCA: 69] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Electrocatalysts and photocatalysts are key to a sustainable future, generating clean fuels, reducing the impact of global warming, and providing solutions to environmental pollution. Improved processes for catalyst design and a better understanding of electro/photocatalytic processes are essential for improving catalyst effectiveness. Recent advances in data science and artificial intelligence have great potential to accelerate electrocatalysis and photocatalysis research, particularly the rapid exploration of large materials chemistry spaces through machine learning. Here a comprehensive introduction to, and critical review of, machine learning techniques used in electrocatalysis and photocatalysis research are provided. Sources of electro/photocatalyst data and current approaches to representing these materials by mathematical features are described, the most commonly used machine learning methods summarized, and the quality and utility of electro/photocatalyst models evaluated. Illustrations of how machine learning models are applied to novel electro/photocatalyst discovery and used to elucidate electrocatalytic or photocatalytic reaction mechanisms are provided. The review offers a guide for materials scientists on the selection of machine learning methods for electrocatalysis and photocatalysis research. The application of machine learning to catalysis science represents a paradigm shift in the way advanced, next-generation catalysts will be designed and synthesized.
Collapse
Affiliation(s)
- Haoxin Mai
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - Tu C Le
- School of Engineering, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - Dehong Chen
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - David A Winkler
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.,Biochemistry and Chemistry, La Trobe University, Kingsbury Drive, Bundoora, Victoria 3042, Australia.,School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Rachel A Caruso
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia
| |
Collapse
|
11
|
Zhou Y, Liu H, Jin X, Xing X, Wang X, Wang G, Zhou M. Significant π Bonding in Coinage Metal Complexes OCTMCCO- from Infrared Photodissociation Spectroscopy and Theoretical Calculations. J Chem Phys 2022; 157:014302. [DOI: 10.1063/5.0099789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A series of coinage metal complexes in the form of TMC(CO)n- (TM=Cu, Ag, Au; n = 0-3) were generated using a laser ablation-supersonic expansion ion source in the gas phase. Mass-selected infrared photodissociation spectroscopy in conjunction with quantum chemical calculations indicated that the TMC(CO)3- complexes contain a linear OCTMCCO- core anion. Bonding analyses suggest that the linear OCTMCCO- anions are better described as the bonding interactions between a singlet ground state TM+ metal cation and the OC/CCO2- ligands in the singlet ground state. Besides the strong ligands to metal σ donation bonding components, the π-bonding components also contribute significantly to the metal-ligands bonding due to the synergetic effects of the CO and CCO2- ligands. The strengths of the bonding of the three metals show a V-shaped trend in which the second-row transition metal Ag exhibits the weakest interactions whereas the third-row transition metal Au has the strongest interactions due to the relativistic effects.
Collapse
Affiliation(s)
| | | | | | - Xiaopeng Xing
- School of Chemical Science and Engineering, Tongji University, China
| | | | | | | |
Collapse
|
12
|
Kitano S, Noguchi TG, Nishihara M, Kamitani K, Sugiyama T, Yoshioka S, Miwa T, Yoshizawa K, Staykov A, Yamauchi M. Heterointerface Created on Au-Cluster-Loaded Unilamellar Hydroxide Electrocatalysts as a Highly Active Site for the Oxygen Evolution Reaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110552. [PMID: 35212064 DOI: 10.1002/adma.202110552] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/29/2022] [Indexed: 06/14/2023]
Abstract
The oxygen evolution reaction (OER) is a critical element for all sorts of reactions that use water as a hydrogen source, such as hydrogen evolution and electrochemical CO2 reduction, and novel design principles that provide highly active sites on OER electrocatalysts push the limits of their practical applications. Herein, Au-cluster loading on unilamellar exfoliated layered double hydroxide (ULDH) electrocatalysts for the OER is demonstrated to fabricate a heterointerface between Au clusters and ULDHs as an active site, which is accompanied by the oxidation state modulation of the active site and interfacial direct OO coupling ("interfacial DOOC"). The Au-cluster-loaded ULDHs exhibit excellent activities for the OER with an overpotential of 189 mV at 10 mA cm-2 . X-ray absorption fine structure measurements reveal that charge transfer from the Au clusters to ULDHs modifies the oxidation states of trivalent metal ions, which can be active sites on the ULDHs. The present study, supported by highly sensitive spectroscopy combining reflection absorption infrared spectroscopy and modulation-excitation spectroscopy and density functional theory calculations, indicates that active sites at the interface between the Au clusters and ULDHs promote a novel OER mechanism through interfacial DOOC, thereby achieving outstanding catalytic performance.
Collapse
Affiliation(s)
- Sho Kitano
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I 2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Tomohiro G Noguchi
- International Institute for Carbon-Neutral Energy Research (WPI-I 2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Masamichi Nishihara
- Next-Generation Fuel Cell Research Center, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kazutaka Kamitani
- Research Center for Synchrotron Light Applications, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Takeharu Sugiyama
- Research Center for Synchrotron Light Applications, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Satoru Yoshioka
- Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Tetsuya Miwa
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Integrated Research Consortium on Chemical Science (IRCCS), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Aleksandar Staykov
- International Institute for Carbon-Neutral Energy Research (WPI-I 2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Miho Yamauchi
- International Institute for Carbon-Neutral Energy Research (WPI-I 2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Research Center for Negative Emissions Technologies (K-Nets), Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| |
Collapse
|
13
|
Zaera F. Designing Sites in Heterogeneous Catalysis: Are We Reaching Selectivities Competitive With Those of Homogeneous Catalysts? Chem Rev 2022; 122:8594-8757. [PMID: 35240777 DOI: 10.1021/acs.chemrev.1c00905] [Citation(s) in RCA: 69] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A critical review of different prominent nanotechnologies adapted to catalysis is provided, with focus on how they contribute to the improvement of selectivity in heterogeneous catalysis. Ways to modify catalytic sites range from the use of the reversible or irreversible adsorption of molecular modifiers to the immobilization or tethering of homogeneous catalysts and the development of well-defined catalytic sites on solid surfaces. The latter covers methods for the dispersion of single-atom sites within solid supports as well as the use of complex nanostructures, and it includes the post-modification of materials via processes such as silylation and atomic layer deposition. All these methodologies exhibit both advantages and limitations, but all offer new avenues for the design of catalysts for specific applications. Because of the high cost of most nanotechnologies and the fact that the resulting materials may exhibit limited thermal or chemical stability, they may be best aimed at improving the selective synthesis of high value-added chemicals, to be incorporated in organic synthesis schemes, but other applications are being explored as well to address problems in energy production, for instance, and to design greener chemical processes. The details of each of these approaches are discussed, and representative examples are provided. We conclude with some general remarks on the future of this field.
Collapse
Affiliation(s)
- Francisco Zaera
- Department of Chemistry and UCR Center for Catalysis, University of California, Riverside, California 92521, United States
| |
Collapse
|
14
|
Wang R, Zhang J, Zhu Y, Chai Z, An Z, Shu X, Song H, Xiang X, He J. Selective Photocatalytic Activation of Ethanol C-H and O-H Bonds over Multi-Au@SiO 2/TiO 2: Role of Catalyst Surface Structure and Reaction Kinetics. ACS APPLIED MATERIALS & INTERFACES 2022; 14:2848-2859. [PMID: 34995054 DOI: 10.1021/acsami.1c20514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The chemical bond diversity and flexible reactivity of biomass-derived ethanol make it a vital feedstock for the production of value-added chemicals but result in low conversion selectivity. Herein, composite catalysts comprising SiO2-coated single- or multiparticle Au cores hybridized with TiO2 nanoparticles (mono- or multi-Au@SiO2/TiO2, respectively) were fabricated via electrostatic self-assembly. The C-H and O-H bonds of ethanol were selectively activated (by SiO2 and TiO2, respectively) under irradiation to form CH3CH•(OH) or CH3CH2O• radicals, respectively. The formation and depletion kinetics of these radicals was analyzed by electron spin resonance to reveal marked differences between mono- and multi-Au@SiO2/TiO2. Consequently, the selectivity of these catalysts for 1,1-diethoxyethane after 6 h irradiation was determined as 81 and 99%, respectively, which was attributed to the more pronounced effect of localized surface plasmon resonance for multi-Au@SiO2/TiO2. Notably, only acetaldehyde was formed on a Au/TiO2 catalyst without a SiO2 shell. Fourier transform infrared (FTIR) spectroscopy indicated that the C-H adsorption of ethanol was enhanced in the case of multi-Au@SiO2/TiO2, while NH3 temperature-programmed desorption and pyridine adsorption FTIR spectroscopy revealed that multi-Au@SiO2/TiO2 exhibited enhanced surface acidity. Collectively, the results of experimental and theoretical analyses indicated that the adsorption of acetaldehyde on multi-Au@SiO2/TiO2 was stronger than that on Au/TiO2, which resulted in the oxidative coupling of ethanol to afford 1,1-diethoxyethane on the former and the dehydrogenation of ethanol to acetaldehyde on the latter.
Collapse
Affiliation(s)
- Ruirui Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| | - Jian Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| | - Yanru Zhu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| | - Zhigang Chai
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| | - Zhe An
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| | - Xin Shu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| | - Hongyan Song
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| | - Xu Xiang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| | - Jing He
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beishanhuan Donglu, Beijing 100029, People's Republic of China
| |
Collapse
|
15
|
Mahdavi-Shakib A, Rich LC, Whittaker TN, Chandler BD. Hydrogen Adsorption at the Au/TiO2 Interface: Quantitative Determination and Spectroscopic Signature of the Reactive Interface Hydroxyl Groups at the Active Site. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04419] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akbar Mahdavi-Shakib
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Lauren C. Rich
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Todd N. Whittaker
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
- Department of Chemical and Biological Engineering, The University of Colorado, Boulder, Colorado 80303, United States
| | - Bert D. Chandler
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| |
Collapse
|
16
|
Liu S, Xu W, Liu W, Li L, Wang J. Sintering-resistant Au/iron oxide-hydroxyapatite nanocatalysts achieved by tuning strong metal-support interactions. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.01.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
17
|
The direct synthesis of hydrogen peroxide over Au and Pd nanoparticles: A DFT study. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
18
|
Kaur N, Goel N, Springborg M, Molayem M. Kinetics and Thermodynamics of CO Oxidation by (TiO 2) 6. Molecules 2021; 26:6415. [PMID: 34770824 PMCID: PMC8586982 DOI: 10.3390/molecules26216415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/18/2021] [Accepted: 10/19/2021] [Indexed: 11/17/2022] Open
Abstract
Molecular level insights into the mechanism and thermodynamics of CO oxidation by a (TiO2)6 cluster have been obtained through density functional calculations. Thereby, in this study, as an example, two different structural isomers of (TiO2)6 are considered with the purpose of understanding the interplay between local structure and activity for the CO oxidation reaction. Active sites in the two isomeric forms were identified on the basis of global and local reactivity descriptors. For the oxidation of CO to CO2, the study considered both sequential and simultaneous adsorption of CO and O2 on (TiO2)6 cluster through the ER and LH mechanisms, respectively. Three different pathways were obtained for CO oxidation by (TiO2)6 cluster, and the mechanistic route of each pathway were identified by locating the transition-state and intermediate structures. The effect of temperature on the rate of the reaction was investigated within the harmonic approximation. The structure-dependent activity of the cluster was rationalized through reactivity descriptors and analysis of the frontier orbitals.
Collapse
Affiliation(s)
- Navjot Kaur
- Theoretical and Computational Chemistry Group, Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India;
- Guru Gobind Singh College For Women, Sector-26, Chandigarh 160014, India
| | - Neetu Goel
- Theoretical and Computational Chemistry Group, Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India;
| | - Michael Springborg
- Physical and Theoretical Chemistry, University of Saarland, 66123 Saarbrücken, Germany;
| | - Mohammad Molayem
- Physical and Theoretical Chemistry, University of Saarland, 66123 Saarbrücken, Germany;
| |
Collapse
|
19
|
Yim CM, Lamoureux PS, Mellor A, Pang CL, Idriss H, Pacchioni G, Thornton G. Size and Shape Dependence of the Electronic Structure of Gold Nanoclusters on TiO 2. J Phys Chem Lett 2021; 12:8363-8369. [PMID: 34432476 DOI: 10.1021/acs.jpclett.1c02167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Understanding the mechanism behind the superior catalytic power of single- or few-atom heterogeneous catalysts has become an important topic in surface chemistry. This is particularly the case for gold, with TiO2 being an efficient support. Here we use scanning tunneling microscopy/spectroscopy with theoretical calculations to investigate the adsorption geometry and local electronic structure of several-atom Au clusters on rutile TiO2(110), with the clusters fabricated by controlled manipulation of single atoms. Our study confirms that Au1 and Au2 clusters prefer adsorption at surface O vacancies. Au3 clusters adsorb at O vacancies in a linear-chain configuration parallel to the surface; in the absence of O vacancies they adsorb at Ti5c sites with a structure of a vertically pointing upright triangle. We find that both the electronic structure and cluster-substrate charge transfer depend critically on the cluster size, bonding configuration, and local environment. This suggests the possibility of engineering cluster selectivity for specific catalytic reactions.
Collapse
Affiliation(s)
- Chi-Ming Yim
- Department of Chemistry and London Centre for Nanotechnology, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Philomena Schlexer Lamoureux
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi 55, 20126 Milano, Italy
| | - Andrew Mellor
- Department of Chemistry and London Centre for Nanotechnology, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Chi L Pang
- Department of Chemistry and London Centre for Nanotechnology, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Hicham Idriss
- Surface Science and Advanced Characterisation, Chemical Sciences Division, SABIC-CRD at KAUST, Thuwal 23955, Saudi Arabia
| | - Gianfranco Pacchioni
- Dipartimento di Scienza dei Materiali, Università degli Studi Milano-Bicocca, via R. Cozzi 55, 20126 Milano, Italy
| | - Geoff Thornton
- Department of Chemistry and London Centre for Nanotechnology, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| |
Collapse
|
20
|
Manipulating Intermediates at the Au–TiO 2 Interface over InP Nanopillar Array for Photoelectrochemical CO 2 Reduction. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02043] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
21
|
Nasriddinov A, Platonov V, Garshev A, Rumyantseva M. Low Temperature HCHO Detection by SnO 2/TiO 2@Au and SnO 2/TiO 2@Pt: Understanding by In-Situ DRIFT Spectroscopy. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2049. [PMID: 34443880 PMCID: PMC8398349 DOI: 10.3390/nano11082049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/06/2021] [Accepted: 08/09/2021] [Indexed: 12/31/2022]
Abstract
In this work we analyze the effectiveness of decoration of nanocrystalline SnO2/TiO2 composites with gold nanoparticles (Au NPs) and platinum nanoparticles (Pt NPs) in enhancing gas sensor properties in low-temperature HCHO detection. Nanocrystalline SnO2/TiO2 composites were synthesized by a chemical precipitation method with following modification with Pt and Au NPs by the impregnation method. The nanocomposites were characterized by TEM, XRD, Raman and FTIR spectroscopy, DRIFTS, XPS, TPR-H2 methods. In HCHO detection, the modification of SnO2 with TiO2 leads to a shift in the optimal temperature from 150 to 100 °C. Further modification of SnO2/TiO2 nanocomposites with Au NPs increases the sensor signal at T = 100 °C, while modification with Pt NPs gives rise to the appearance of sensor responses at T = 25 °C and 50 °C. At 200 °C nanocomposites exhibited high selectivity toward formaldehyde within the sub-ppm concentration range among different VOCs. The influence of Pt and Au NPs on surface reactivity of SnO2/TiO2 composite and enhancement of the sensor response toward HCHO was studied by DRIFT spectroscopy and explained by the chemical and electronic sensitization mechanisms.
Collapse
Affiliation(s)
- Abulkosim Nasriddinov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia; (A.N.); (V.P.); (A.G.)
- Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Vadim Platonov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia; (A.N.); (V.P.); (A.G.)
| | - Alexey Garshev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia; (A.N.); (V.P.); (A.G.)
- Department of Materials Science, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Marina Rumyantseva
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia; (A.N.); (V.P.); (A.G.)
| |
Collapse
|
22
|
Chen LS, Liu YZ, Li XN, Chen JJ, Jiang GD, Ma TM, He SG. An IrVO 4+ Cluster Catalytically Oxidizes Four CO Molecules: Importance of Ir-V Multiple Bonding. J Phys Chem Lett 2021; 12:6519-6525. [PMID: 34240876 DOI: 10.1021/acs.jpclett.1c01584] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The generation and characterization of multiple metal-metal (M-M) bonds between early and late transition metals is vital to correlate the nature of multiple M-M bonds with the related reactivity in catalysis, while the examples with multiple M-M bonds have been rarely reported. Herein, we identified that the quadruple bonding interactions were formed in a gas-phase ion IrV+ with a dramatically short Ir-V bond. Oxidation of four CO molecules by IrVO4+ is a highly exothermic process driven by the generation of stable products IrV+ and CO2, and then IrV+ can be oxidized by N2O to regenerate IrVO4+. This finding overturns the general impression that vanadium oxide clusters are unwilling to oxidize multiple CO molecules because of the strong V-O bond and that at most two oxygen atoms can be supplied from a single V-containing cluster in CO oxidation. This study emphasizes the potential importance of heterobimetallic multiple M-M bonds in related heterogeneous catalysis.
Collapse
Affiliation(s)
- Le-Shi Chen
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510641, China
| | - Yun-Zhu Liu
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing 100190, China
| | - Xiao-Na Li
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing 100190, China
| | - Jiao-Jiao Chen
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing 100190, China
| | - Gui-Duo Jiang
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing 100190, China
| | - Tong-Mei Ma
- School of Chemistry and Chemical Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510641, China
| | - Sheng-Gui He
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing 100190, China
| |
Collapse
|
23
|
Mahdavi-Shakib A, Kumar KBS, Whittaker TN, Xie T, Grabow LC, Rioux RM, Chandler BD. Kinetics of H 2 Adsorption at the Metal-Support Interface of Au/TiO 2 Catalysts Probed by Broad Background IR Absorbance. Angew Chem Int Ed Engl 2021; 60:7735-7743. [PMID: 33403732 DOI: 10.1002/anie.202013359] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Indexed: 11/08/2022]
Abstract
H2 adsorption on Au catalysts is weak and reversible, making it difficult to quantitatively study. We demonstrate H2 adsorption on Au/TiO2 catalysts results in electron transfer to the support, inducing shifts in the FTIR background. This broad background absorbance (BBA) signal is used to quantify H2 adsorption; adsorption equilibrium constants are comparable to volumetric adsorption measurements. H2 adsorption kinetics measured with the BBA show a lower Eapp value (23 kJ mol-1 ) for H2 adsorption than previously reported from proxy H/D exchange (33 kJ mol-1 ). We also identify a previously unreported H-O-H bending vibration associated with proton adsorption on electronically distinct Ti-OH metal-support interface sites, providing new insight into the nature and dynamics of H2 adsorption at the Au/TiO2 interface.
Collapse
Affiliation(s)
| | - K B Sravan Kumar
- Department of Chemistry, Trinity University, San Antonio, TX, 78212-7200, USA.,Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX, 77204-4004, USA
| | - Todd N Whittaker
- Department of Chemistry, Trinity University, San Antonio, TX, 78212-7200, USA
| | - Tianze Xie
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Lars C Grabow
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX, 77204-4004, USA.,Texas Center for Superconductivity at the, University of Houston (TcSUH), University of Houston, Houston, TX, 77204, USA
| | - Robert M Rioux
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA.,Department of Chemistry, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Bert D Chandler
- Department of Chemistry, Trinity University, San Antonio, TX, 78212-7200, USA.,Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA.,Department of Chemistry, The Pennsylvania State University, University Park, PA, 16802, USA
| |
Collapse
|
24
|
Mahdavi‐Shakib A, Kumar KBS, Whittaker TN, Xie T, Grabow LC, Rioux RM, Chandler BD. Kinetics of H
2
Adsorption at the Metal–Support Interface of Au/TiO
2
Catalysts Probed by Broad Background IR Absorbance. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - K. B. Sravan Kumar
- Department of Chemistry Trinity University San Antonio TX 78212-7200 USA
- Department of Chemical and Biomolecular Engineering University of Houston Houston TX 77204-4004 USA
| | - Todd N. Whittaker
- Department of Chemistry Trinity University San Antonio TX 78212-7200 USA
| | - Tianze Xie
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
| | - Lars C. Grabow
- Department of Chemical and Biomolecular Engineering University of Houston Houston TX 77204-4004 USA
- Texas Center for Superconductivity at the University of Houston (TcSUH) University of Houston Houston TX 77204 USA
| | - Robert M. Rioux
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
- Department of Chemistry The Pennsylvania State University University Park PA 16802 USA
| | - Bert D. Chandler
- Department of Chemistry Trinity University San Antonio TX 78212-7200 USA
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
- Department of Chemistry The Pennsylvania State University University Park PA 16802 USA
| |
Collapse
|
25
|
|
26
|
Das AK, Mukherjee S, R SS, Nair AS, Bhandary S, Chopra D, Sanyal D, Pathak B, Mandal S. Defects Engineering on Ceria and C-C Coupling Reactions Using [Au 11(PPh 3) 7I 3] Nanocluster: A Combined Experimental and Theoretical Study. ACS NANO 2020; 14:16681-16688. [PMID: 33253533 DOI: 10.1021/acsnano.0c03010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ligand protected atom-precise gold-based catalysts have been utilized in many essential chemical processes, but their mechanism and the fate of the catalyst during reaction are still unrevealed. Atom-precise cluster without ligands are thus highly desirable to maximize atom efficiency, but making these in solution phase is challenging. In this scenario, catalysts with dispersion on oxide support are highly desirable to understand the role of metal core during catalytic reaction. Here, we report the synthesis of Au11(PPh3)7I3 cluster that consists of an incomplete icosahedron core. During its impregnation process on CeO2 support, all of the ligands were removed from the kernel and the Au11 kernel fits into the defects of ceria (embedded onto the oxygen vacancy of ceria (111) plane). This Au11@CeO2 has high atom efficiency and catalytic activity for Ullmann-type C-C homocoupling reactions for electron rich substrates. Density functional theory calculations showed that hexagonal arrangements of Au11 kernel on (111) plane of CeO2 is the most stable one. Theoretical calculations also proved that the atop gold atom has more favorable interaction with phenyl iodide than the second layer gold atoms of the Au11@CeO2. This demonstrated that the present catalyst mimics the single-atom catalyst-like behavior in facilitating the coupling reactions.
Collapse
Affiliation(s)
- Anish Kumar Das
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, Kerala 695551, India
| | - Sayani Mukherjee
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, Kerala 695551, India
| | - Sreehari S R
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, Kerala 695551, India
| | - Akhil S Nair
- School of Basic Science, Indian Institute of Technology, Indore, Madhya Pradesh 453552, India
| | - Subhrajyoti Bhandary
- School of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Deepak Chopra
- School of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh 462066, India
| | - Dirtha Sanyal
- Variable Energy Cyclotron Centre, HBNI, 1/AF Bidhannagar, Kolkata 700064, India
| | - Biswarup Pathak
- School of Basic Science, Indian Institute of Technology, Indore, Madhya Pradesh 453552, India
| | - Sukhendu Mandal
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, Kerala 695551, India
| |
Collapse
|
27
|
Copper-zirconia interfaces in UiO-66 enable selective catalytic hydrogenation of CO 2 to methanol. Nat Commun 2020; 11:5849. [PMID: 33208734 PMCID: PMC7674450 DOI: 10.1038/s41467-020-19438-w] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 09/23/2020] [Indexed: 11/24/2022] Open
Abstract
Molecular interactions with both oxides and metals are essential for heterogenous catalysis, leading to remarkable synergistic impacts on activity and selectivity. Here, we show that the direct link between the two phases (and not merely being together) is required to selectively hydrogenate CO2 to methanol on catalysts containing Cu and ZrO2. Materials consisting of isolated Cu particles or atomically dispersed Cu–O–Zr sites only catalyze the reverse water-gas shift reaction. In contrast, a metal organic framework structure (UiO-66) with Cu nanoparticles occupying missing-linker defects maximizes the fraction of metallic Cu interfaced to ZrO2 nodes leading to a material with high adsorption capacity for CO2 and high activity and selectivity for low-temperature methanol synthesis. Molecular interactions with both oxides and metals are essential for heterogenous catalysis, leading to remarkable impacts on activity. Here the authors show that a direct link between Cu and ZrO2 in a metal organic framework is required to hydrogenate CO2 to methanol.
Collapse
|
28
|
Lu F, Yi D, Liu S, Zhan F, Zhou B, Gu L, Golberg D, Wang X, Yao J. Engineering Platinum–Oxygen Dual Catalytic Sites via Charge Transfer towards Highly Efficient Hydrogen Evolution. Angew Chem Int Ed Engl 2020; 59:17712-17718. [DOI: 10.1002/anie.202008117] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 07/02/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Fei Lu
- Key Laboratory of Luminescence and Optical Information Ministry of Education Department of Physics School of Science Beijing Jiaotong University Beijing 100044 P. R. China
- Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Ding Yi
- Key Laboratory of Luminescence and Optical Information Ministry of Education Department of Physics School of Science Beijing Jiaotong University Beijing 100044 P. R. China
| | - Shoujie Liu
- Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China
- Institute of Molecular Plus Tianjin University Tianjin 300072 P. R. China
| | - Fei Zhan
- Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China
| | - Bo Zhou
- Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Dmitri Golberg
- Centre for Materials Science Queensland University of Technology (QUT) 2 George St. Brisbane QLD 4000 Australia
- School of Chemistry and Physics, Science and Engineering Faculty Science and Engineering Faculty Queensland University of Technology (QUT) 2 George St. Brisbane QLD 4000 Australia
- International Centre for Materials Nanoarhitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1 Tsukuba Ibaraki 3050044 Japan
| | - Xi Wang
- Key Laboratory of Luminescence and Optical Information Ministry of Education Department of Physics School of Science Beijing Jiaotong University Beijing 100044 P. R. China
| | - Jiannian Yao
- Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China
- Institute of Molecular Plus Tianjin University Tianjin 300072 P. R. China
| |
Collapse
|
29
|
Lu F, Yi D, Liu S, Zhan F, Zhou B, Gu L, Golberg D, Wang X, Yao J. Engineering Platinum–Oxygen Dual Catalytic Sites via Charge Transfer towards Highly Efficient Hydrogen Evolution. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008117] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fei Lu
- Key Laboratory of Luminescence and Optical Information Ministry of Education Department of Physics School of Science Beijing Jiaotong University Beijing 100044 P. R. China
- Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Ding Yi
- Key Laboratory of Luminescence and Optical Information Ministry of Education Department of Physics School of Science Beijing Jiaotong University Beijing 100044 P. R. China
| | - Shoujie Liu
- Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China
- Institute of Molecular Plus Tianjin University Tianjin 300072 P. R. China
| | - Fei Zhan
- Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China
| | - Bo Zhou
- Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Dmitri Golberg
- Centre for Materials Science Queensland University of Technology (QUT) 2 George St. Brisbane QLD 4000 Australia
- School of Chemistry and Physics, Science and Engineering Faculty Science and Engineering Faculty Queensland University of Technology (QUT) 2 George St. Brisbane QLD 4000 Australia
- International Centre for Materials Nanoarhitectonics (MANA) National Institute for Materials Science (NIMS) Namiki 1-1 Tsukuba Ibaraki 3050044 Japan
| | - Xi Wang
- Key Laboratory of Luminescence and Optical Information Ministry of Education Department of Physics School of Science Beijing Jiaotong University Beijing 100044 P. R. China
| | - Jiannian Yao
- Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031 P. R. China
- Institute of Molecular Plus Tianjin University Tianjin 300072 P. R. China
| |
Collapse
|
30
|
Mahdavi-Shakib A, Sempel J, Babb L, Oza A, Hoffman M, Whittaker TN, Chandler BD, Austin RN. Combining Benzyl Alcohol Oxidation Saturation Kinetics and Hammett Studies as Mechanistic Tools for Examining Supported Metal Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02212] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akbar Mahdavi-Shakib
- Department of Chemistry, Barnard College of Columbia University, 3009 Broadway, New York, New York 10027, United States
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Janine Sempel
- Department of Chemistry, Barnard College of Columbia University, 3009 Broadway, New York, New York 10027, United States
| | - Lauren Babb
- Department of Chemistry, Barnard College of Columbia University, 3009 Broadway, New York, New York 10027, United States
| | - Aisha Oza
- Department of Chemistry, Barnard College of Columbia University, 3009 Broadway, New York, New York 10027, United States
| | - Maya Hoffman
- Department of Chemistry, Barnard College of Columbia University, 3009 Broadway, New York, New York 10027, United States
| | - Todd N. Whittaker
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Bert D. Chandler
- Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, United States
| | - Rachel Narehood Austin
- Department of Chemistry, Barnard College of Columbia University, 3009 Broadway, New York, New York 10027, United States
| |
Collapse
|
31
|
Siemer N, Muñoz-Santiburcio D, Marx D. Solvation-Enhanced Oxygen Activation at Gold/Titania Nanocatalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01326] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Niklas Siemer
- Lehrstuhl für Theoretische Chemie, Ruhr−Universität Bochum, 44780 Bochum, Germany
| | | | - Dominik Marx
- Lehrstuhl für Theoretische Chemie, Ruhr−Universität Bochum, 44780 Bochum, Germany
| |
Collapse
|
32
|
Sankar M, He Q, Engel RV, Sainna MA, Logsdail AJ, Roldan A, Willock DJ, Agarwal N, Kiely CJ, Hutchings GJ. Role of the Support in Gold-Containing Nanoparticles as Heterogeneous Catalysts. Chem Rev 2020; 120:3890-3938. [PMID: 32223178 PMCID: PMC7181275 DOI: 10.1021/acs.chemrev.9b00662] [Citation(s) in RCA: 160] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
![]()
In
this review, we discuss selected examples from recent literature
on the role of the support on directing the nanostructures of Au-based
monometallic and bimetallic nanoparticles. The role of support is
then discussed in relation to the catalytic properties of Au-based
monometallic and bimetallic nanoparticles using different gas phase
and liquid phase reactions. The reactions discussed include CO oxidation,
aerobic oxidation of monohydric and polyhydric alcohols, selective
hydrogenation of alkynes, hydrogenation of nitroaromatics, CO2 hydrogenation, C–C coupling, and methane oxidation.
Only studies where the role of support has been explicitly studied
in detail have been selected for discussion. However, the role of
support is also examined using examples of reactions involving unsupported
metal nanoparticles (i.e., colloidal nanoparticles). It is clear that
the support functionality can play a crucial role in tuning the catalytic
activity that is observed and that advanced theory and characterization
add greatly to our understanding of these fascinating catalysts.
Collapse
Affiliation(s)
| | - Qian He
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K.,Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575
| | - Rebecca V Engel
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
| | - Mala A Sainna
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
| | - Andrew J Logsdail
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
| | - Alberto Roldan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
| | - David J Willock
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
| | - Nishtha Agarwal
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
| | - Christopher J Kiely
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K.,Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, United States
| | - Graham J Hutchings
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, U.K
| |
Collapse
|
33
|
Huang J, He S, Goodsell JL, Mulcahy JR, Guo W, Angerhofer A, Wei WD. Manipulating Atomic Structures at the Au/TiO2 Interface for O2 Activation. J Am Chem Soc 2020; 142:6456-6460. [DOI: 10.1021/jacs.9b13453] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jiawei Huang
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Shuai He
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Justin L. Goodsell
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Justin R. Mulcahy
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Wenxiao Guo
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Alexander Angerhofer
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Wei David Wei
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| |
Collapse
|
34
|
Abstract
In the last decades, photocatalysis has arisen as a solution to degrade emerging pollutants such as antibiotics. However, the reduced photoactivation of TiO2 under visible radiation constitutes a major drawback because 95% of sunlight radiation is not being used in this process. Thus, it is critical to modify TiO2 nanoparticles to improve the ability to absorb visible radiation from sunlight. This work reports on the synthesis of TiO2 nanoparticles decorated with gold (Au) nanoparticles by deposition-precipitation method for enhanced photocatalytic activity. The produced nanocomposites absorb 40% to 55% more radiation in the visible range than pristine TiO2, the best results being obtained for the synthesis performed at 25 °C and with Au loading of 0.05 to 0.1 wt. %. Experimental tests yielded a higher photocatalytic degradation of 91% and 49% of ciprofloxacin (5 mg/L) under UV and visible radiation, correspondingly. Computational modeling supports the experimental results, showing the ability of Au to bind TiO2 anatase surfaces, the relevant role of Au transferring electrons, and the high affinity of ciprofloxacin to both Au and TiO2 surfaces. Hence, the present work represents a reliable approach to produce efficient photocatalytic materials and an overall contribution in the development of high-performance Au/TiO2 photocatalytic nanostructures through the optimization of the synthesis parameters, photocatalytic conditions, and computational modeling.
Collapse
|
35
|
Goodman KR, Wang J, Ma Y, Tong X, Stacchiola DJ, White MG. Morphology and reactivity of size-selected titanium oxide nanoclusters on Au(111). J Chem Phys 2020; 152:054714. [DOI: 10.1063/1.5134453] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Kenneth R. Goodman
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, USA
| | - Jason Wang
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, USA
| | - Yilin Ma
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, USA
| | - Xiao Tong
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Dario J. Stacchiola
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Michael G. White
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, USA
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, USA
| |
Collapse
|
36
|
Li Y, Li S, Bäumer M, Ivanova-Shor EA, Moskaleva LV. What Changes on the Inverse Catalyst? Insights from CO Oxidation on Au-Supported Ceria Nanoparticles Using Ab Initio Molecular Dynamics. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yong Li
- Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology, University of Bremen, Bremen 28359, Germany
| | - Shikun Li
- Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology, University of Bremen, Bremen 28359, Germany
| | - Marcus Bäumer
- Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology, University of Bremen, Bremen 28359, Germany
| | - Elena A. Ivanova-Shor
- Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Scientific Center SB RAS”, Krasnoyarsk 660036, Russia
| | - Lyudmila V. Moskaleva
- Institute of Applied and Physical Chemistry and Center for Environmental Research and Sustainable Technology, University of Bremen, Bremen 28359, Germany
- Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa
| |
Collapse
|
37
|
Yu K, Lou L, Liu S, Zhou W. Asymmetric Oxygen Vacancies: the Intrinsic Redox Active Sites in Metal Oxide Catalysts. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1901970. [PMID: 31993288 PMCID: PMC6974941 DOI: 10.1002/advs.201901970] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 10/23/2019] [Indexed: 05/06/2023]
Abstract
To identify the intrinsic active sites in oxides or oxide supported catalysts is a research frontier in the fields of heterogeneous catalysis and material science. In particular, the role of oxygen vacancies on the redox properties of oxide catalysts is still not fully understood. Herein, some relevant research dealing with M1-O-M2 or M1-□-M2 linkages as active sites in mixed oxides, in oxide supported single-atom catalysts, and at metal/oxide interfaces of oxide supported nanometal catalysts for various reaction systems is reviewed. It is found that the catalytic activity of these oxides not only depends on the amounts of oxygen vacancies and metastable cations but also shows a significant influence from the local environment of the active sites, in particular, the symmetry of the oxygen vacancies. Based on the recent progress in the relevant fields, an "asymmetric oxygen vacancy site" is introduced, which indicates an oxygen vacancy with an asymmetric coordination of cations, making oxygen "easy come, easy go," i.e., more reactive in redox reactions. The establishment of this new mechanism would shed light on the future investigation of the intrinsic active sites in oxide and oxide supported catalysts.
Collapse
Affiliation(s)
- Kai Yu
- MOE Key Laboratory of Pollution Processes and Environmental CriteriaTianjin Key Laboratory of Environmental Technology for Complex Trans‐Media PollutionCollege of Environmental Science and EngineeringNankai UniversityTianjin300350China
| | - Lan‐Lan Lou
- School of Materials Science and Engineering & National Institute of Advanced MaterialsNankai UniversityTianjin300350China
| | - Shuangxi Liu
- School of Materials Science and Engineering & National Institute of Advanced MaterialsNankai UniversityTianjin300350China
| | - Wuzong Zhou
- School of ChemistryUniversity of St AndrewsSt AndrewsKY16 9STUK
| |
Collapse
|
38
|
Oh S, Ha H, Choi H, Jo C, Cho J, Choi H, Ryoo R, Kim HY, Park JY. Oxygen activation on the interface between Pt nanoparticles and mesoporous defective TiO2 during CO oxidation. J Chem Phys 2019; 151:234716. [DOI: 10.1063/1.5131464] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Sunyoung Oh
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Hyunwoo Ha
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, South Korea
| | - Hanseul Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Changbum Jo
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Jangkeun Cho
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Hyuk Choi
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, South Korea
| | - Ryong Ryoo
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Hyun You Kim
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, South Korea
| | - Jeong Young Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| |
Collapse
|
39
|
Ma H, Li S, Wang H, Schneider WF. Water-Mediated Reduction of Aqueous N-Nitrosodimethylamine with Pd. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:7551-7563. [PMID: 31244058 DOI: 10.1021/acs.est.9b01425] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Pd-catalyzed reduction has emerged as a promising treatment strategy to remove the recalcitrant disinfection byproduct N-nitrosodimethylamine (NDMA). However, the reaction pathways remain unexplored, and questions remain about how water solvent influences NDMA reduction mechanisms and selectivity. Here, we compute the energies and barriers of all relevant elementary steps in NDMA reduction by H2 on Pd(111) using density functional theory. We further calculate water-assisted H-shuttling for all hydrogenation reactions explicitly and include water solvation for all elementary reactions implicitly. We parametrize microkinetic models to predict product formation rates and selectivities over a wide range of NDMA concentrations. We show that H2O-mediated H-shuttling lowers the reaction barriers for all hydrogenation reactions involved in NDMA reduction while implicit solvation has negligible impact on the reaction and activation energies. We further conduct batch experiments with SiO2-supported Pd nanoparticles and compare them with the microkinetic models. The predicted rates, selectivity, and apparent activation energy from the model parametrized with both explicit H2O-mediated H-shuttling and implicit solvation correspond well with experimental observations. Models that ignore water as an H-shuttle or solvent fail to recover the experimental rates and apparent activation energy. We identified the rate-determining steps of the reaction and show the reaction flow pathways of the complicated reaction network. Finally, we demonstrate that water-mediated H-shuttling changes the rate-determining steps and reaction flows of elementary reactions.
Collapse
Affiliation(s)
- Hanyu Ma
- Department of Chemical and Biomolecular Engineering , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Sichi Li
- Department of Chemical and Biomolecular Engineering , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Haitao Wang
- School of Environmental Science and Technology , Nankai University , Tianjin 300350 , PR China
| | - William F Schneider
- Department of Chemical and Biomolecular Engineering , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| |
Collapse
|
40
|
A promising visible-light photocatalyst: H2 plasma-activated amorphous-TiO2-supported Au nanoparticles. J Catal 2019. [DOI: 10.1016/j.jcat.2019.05.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
41
|
Zhang M, Sun H, Chen X, Yang J, Shi L, Chen T, Bao Z, Liu J, Wu Y. Highly Efficient Photoinduced Enhanced Raman Spectroscopy (PIERS) from Plasmonic Nanoparticles Decorated 3D Semiconductor Arrays for Ultrasensitive, Portable, and Recyclable Detection of Organic Pollutants. ACS Sens 2019; 4:1670-1681. [PMID: 31117365 DOI: 10.1021/acssensors.9b00562] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Semiconductor materials have become competitive candidates for surface-enhanced Raman scattering (SERS) substrates; however, their limited SERS sensitivity hinders the practical applications of semiconductors. Here, we develop a hybrid substrate by integrating anatase/rutile TiO2 heterostructure with dense plasmonic hotspots of Ag nanoparticle (AgNPs) for efficient photoinduced enhanced Raman spectroscopy (PIERS). The PIERS mechanism is systematically investigated by means of a portable Raman instrument. When ultraviolet (UV) light irradiates the substrate, the TiO2-Ag hybrid arrays produce remarkable charge-transfer enhancement, which can be ascribed to the highly efficient charge separation driven by heterojunction and transfer from TiO2 heterostructure to AgNPs. This platform allows for the rapid detection of multifold organic species, including malachite green (MG), crystal violet (CV), rhodamine 6G (R6G), thiram, and acephate, and as high as 27.8-fold enhancement over the normal SERS is achieved, representing the highest PIERS magnification up to the present time. The intensive PIERS enhancement makes it ultrasensitively detect analyte concentration of an order of magnitude lower than that of SERS method. The improved sensitivity and resolution can be readily realized by simple UV irradiation, which represents a major advantage of our PIERS methodology. Besides, the integration of uniform TiO2 heterostructure arrays with AgNPs generates superior signal reproducibility with relative standard deviation (RSD) value of less than 14%. In addition, the detected molecules on the substrate can be eliminated by photocatalytic degradation after PIERS measurements by using UV irradiation, which makes the substrate reusable for 15 cycles. The ultrahigh sensitivity, superior reproducibility, and excellent recyclability displayed by our platform may provide new opportunities in field detection analysis coupled with a portable Raman instrument.
Collapse
Affiliation(s)
| | | | | | | | - Liang Shi
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, China
| | | | | | | | | |
Collapse
|
42
|
Zhao Y, Wang M, Zhang Y, Ding X, He S. Activity of Atomically Precise Titania Nanoparticles in CO Oxidation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yan‐Xia Zhao
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- Beijing National Laboratory for Molecular Sciences and CAS Research Education Centre of Excellence in Molecular Sciences Beijing 100190 P. R. China
| | - Meng‐Meng Wang
- Department of Mathematics and Physics North China Electric Power University Beijing 102206 China
| | - Yan Zhang
- Department of Mathematics and Physics North China Electric Power University Beijing 102206 China
| | - Xun‐Lei Ding
- Department of Mathematics and Physics North China Electric Power University Beijing 102206 China
| | - Sheng‐Gui He
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- Beijing National Laboratory for Molecular Sciences and CAS Research Education Centre of Excellence in Molecular Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| |
Collapse
|
43
|
Zhao Y, Wang M, Zhang Y, Ding X, He S. Activity of Atomically Precise Titania Nanoparticles in CO Oxidation. Angew Chem Int Ed Engl 2019; 58:8002-8006. [DOI: 10.1002/anie.201902008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/01/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Yan‐Xia Zhao
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- Beijing National Laboratory for Molecular Sciences and CAS Research Education Centre of Excellence in Molecular Sciences Beijing 100190 P. R. China
| | - Meng‐Meng Wang
- Department of Mathematics and Physics North China Electric Power University Beijing 102206 China
| | - Yan Zhang
- Department of Mathematics and Physics North China Electric Power University Beijing 102206 China
| | - Xun‐Lei Ding
- Department of Mathematics and Physics North China Electric Power University Beijing 102206 China
| | - Sheng‐Gui He
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- Beijing National Laboratory for Molecular Sciences and CAS Research Education Centre of Excellence in Molecular Sciences Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| |
Collapse
|
44
|
Wang L, Zhou Y, Timoshenko J, Liu S, Qiao Q, Kisslinger K, Cuiffo M, Chuang YC, Zuo X, Xue Y, Guo Y, Pan C, Li H, Nam CY, Bliznakov S, Liu P, Frenkel AI, Zhu Y, Rafailovich MH. Designing Nanoplatelet Alloy/Nafion Catalytic Interface for Optimization of PEMFCs: Performance, Durability, and CO Resistance. ACS Catal 2019. [DOI: 10.1021/acscatal.8b03611] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Likun Wang
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Yuchen Zhou
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Janis Timoshenko
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Shizhong Liu
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Qiao Qiao
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Kim Kisslinger
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Michael Cuiffo
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Ya-Chen Chuang
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Xianghao Zuo
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Yuan Xue
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Yichen Guo
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Cheng Pan
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Hongfei Li
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Chang-Yong Nam
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Stoyan Bliznakov
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| | - Ping Liu
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Anatoly I. Frenkel
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Yimei Zhu
- Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Miriam H. Rafailovich
- Department of Materials Science and Chemical Engineering, State University of New York at Stony Brook, Stony Brook, New York 11794, United States
| |
Collapse
|
45
|
Yang Y, Chen J, Liu X, Qiu M, Liu L, Gao F. Oxygen vacancy-mediated WO 3 nanosheets by etched {200} facets and the efficient visible-light photocatalytic oxygen evolution. NEW J CHEM 2019. [DOI: 10.1039/c9nj04286e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The abundant oxygen vacancies in WO3 nanosheets result in the significant improvement of the photocatalytic O2 evolution.
Collapse
Affiliation(s)
- Yurong Yang
- College of Science
- Heihe University
- Heihe
- P. R. China
- Key Laboratory of Superlight Materials and Surface Technology
| | - Jiaming Chen
- College of Science
- Heihe University
- Heihe
- P. R. China
| | - Xuelian Liu
- College of Science
- Heihe University
- Heihe
- P. R. China
| | - Min Qiu
- College of Science
- Heihe University
- Heihe
- P. R. China
| | - Li Liu
- College of Science
- Heihe University
- Heihe
- P. R. China
| | - Fan Gao
- College of Science
- Heihe University
- Heihe
- P. R. China
| |
Collapse
|
46
|
Titania-morphology-dependent dual-perimeter-sites catalysis by Au/TiO2 catalysts in low-temperature CO oxidation. J Catal 2018. [DOI: 10.1016/j.jcat.2018.09.032] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
47
|
Cui Z, Dong X, Sun Y, Zhou Y, Zhang Y, Dong F. Simultaneous introduction of oxygen vacancies and Bi metal onto the {001} facet of Bi 3O 4Cl woven nanobelts for synergistically enhanced photocatalysis. NANOSCALE 2018; 10:16928-16934. [PMID: 30178788 DOI: 10.1039/c8nr05322g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In order to relieve air pollution problems via photocatalytic NO purification, we prepared Bi3O4Cl (BOC) woven nanobelts with exposed {001} facets by a one-pot hydrothermal method. The as-prepared catalysts were modified by a simple chemical reduction to introduce oxygen vacancies (OVs) and plasmonic Bi metal on their surfaces. The photocatalytic performance was strongly dependent on the OVs and surface plasmon resonance (SPR) effect induced by Bi metal. DFT calculations and in situ DRIFTS study were closely combined to show that the OVs could not only induce the formation of a middle-gap in BOC which increases the production of the ˙OH species by introducing more holes on the valence band, but also promote the generation of ˙O2- species by activating the adsorbed O2 on the surface. Meanwhile, the Bi metal can serve both as an electron donor and a bridge for charge transfer to promote charge separation. As a result, the OVs and Bi metal could synergistically tailor the charge transfer pathway and enhance the photocatalytic performance significantly. Moreover, the reaction intermediates were revealed and the mechanism of photocatalytic NO oxidation was proposed based on in situ DRIFTS spectra. The design concept of modifying the catalyst surface via simultaneous introduction of OVs and Bi metal on the catalyst surface could offer a novel strategy to enhance the photocatalytic performance of other nanomaterials for environmental and energy-related applications.
Collapse
Affiliation(s)
- Zhihao Cui
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China.
| | | | | | | | | | | |
Collapse
|
48
|
Jiang LX, Li XN, Li ZY, Li HF, He SG. H2 dissociation by Au1-doped closed-shell titanium oxide cluster anions. CHINESE J CHEM PHYS 2018. [DOI: 10.1063/1674-0068/31/cjcp1805107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Li-xue Jiang
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, China
| | - Xiao-na Li
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, China
| | - Zi-yu Li
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, China
| | - Hai-fang Li
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, China
| | - Sheng-gui He
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center of Excellence in Molecular Sciences, Beijing 100190, China
| |
Collapse
|
49
|
Zhu J, Xu ZJ, Weng GJ, Zhao J, Li JJ, Zhao JW. Etching-dependent fluorescence quenching of Ag-dielectric-Au three-layered nanoshells: The effect of inner Ag nanosphere. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 200:43-50. [PMID: 29660681 DOI: 10.1016/j.saa.2018.04.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 03/31/2018] [Accepted: 04/08/2018] [Indexed: 06/08/2023]
Abstract
In this report, Ag-dielectric-Au three-layered nanoshells with controlled inner core size were synthesized. The fluorescence emission of the rhodamine 6G (R6G) could be quenched by the three-layered nanoshells distinctly. What's more, the fluorescence quenching efficiency could be further improved by tuning the etching of inner Ag nanosphere. The maximum fluorescence quenching efficiency is obtained when the separate layer just appears between the inner Ag core and the outer Au shell. Whereas the fluorescence quenching efficiency is weakened when no gaps take place around the inner Ag core or the separate layer is too thick and greater than 13nm. The fluorescence quenching properties of the Ag-dielectric-Au three-layered nanoshells with different initial sizes of the Ag nanoparticles are also studied. The maximum fluorescence quenching efficiency is obtained when the three-layered nanoshells are synthesized based on the Ag nanoparticles with 60nm, which is better than others two sizes (42 and 79nm). Thus we believe that the size of initial Ag nanospheres also greatly affects the optimized fluorescence quenching efficiency. These results about fluorescence quenching properties of Ag-dielectric-Au three-layered nanoshells present a potential for design and fabrication of fluorescence nanosensors based on tuning the geometry of the inner core and the separate layer.
Collapse
Affiliation(s)
- Jian Zhu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zai-Jie Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Guo-Jun Weng
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jing Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jian-Jun Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jun-Wu Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
| |
Collapse
|
50
|
De SK, Mondal S, Sen P, Pal U, Pathak B, Rawat KS, Bardhan M, Bhattacharya M, Satpati B, De A, Senapati D. Crystal-defect-induced facet-dependent electrocatalytic activity of 3D gold nanoflowers for the selective nanomolar detection of ascorbic acid. NANOSCALE 2018; 10:11091-11102. [PMID: 29872830 DOI: 10.1039/c8nr03087a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding and exploring the decisive factors responsible for superlative catalytic efficiency is necessary to formulate active electrode materials for improved electrocatalysis and high-throughput sensing. This research demonstrates the ability of bud-shaped gold nanoflowers (AuNFs), intermediates in the bud-to-blossom gold nanoflower synthesis, to offer remarkable electrocatalytic efficiency in the oxidation of ascorbic acid (AA) at nanomolar concentrations. Multicomponent sensing in a single potential sweep is measured using differential pulse voltammetry while the kinetic parameters are estimated using electrochemical impedance spectroscopy. The outstanding catalytic activity of bud-structured AuNF [iAuNFp(Bud)/iGCp ≅ 100] compared with other bud-to-blossom intermediate nanostructures is explained by studying their structural transitions, charge distributions, crystalline patterns, and intrinsic irregularities/defects. Detailed microscopic analysis shows that density of crystal defects, such as edges, terraces, steps, ledges, kinks, and dislocation, plays a major role in producing the high catalytic efficiency. An associated ab initio simulation provides necessary support for the projected role of different crystal facets as selective catalytic sites. Density functional theory corroborates the appearance of inter- and intra-molecular hydrogen bonding within AA molecules to control the resultant fingerprint peak potentials at variable concentrations. Bud-structured AuNF facilitates AA detection at nanomolar levels in a multicomponent pathological sample.
Collapse
Affiliation(s)
- Sandip Kumar De
- Chemical Science Division, Saha Institute of Nuclear Physics, Kolkata, West Bengal, India
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|