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Halder K, Sabnam K, Das A, Goswami DK, Dasgupta S. Thin Film Formation of HSA in the Presence of CTAB-Capped Gold Nanorods through Phase Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:14847-14862. [PMID: 38952216 DOI: 10.1021/acs.langmuir.4c00694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Phase behavior in protein-nanoparticle systems in light of protein corona formation has been investigated. We report the formation of HSA thin films following the addition of a solid protein to a solution of CTAB-capped gold nanorods (AuNRs) via phase separation. The phase separation behavior was observed through UV-vis spectroscopy, turbidity assays, and DLS studies. UV-vis spectra for the protein-AuNR solution indicated a possible self-assembly formation by CTAB-HSA complexes and AuNR-HSA conjugates. The turbidity was found to increase linearly up to 30-50% v/v for each component. The growth phase slope is proportional to the concentration of the components, AuNRs, and HSA, with no lag phase. Dynamic light scattering (DLS) shows the formation of larger aggregates with time, implying a segregated phase of AuNR-HSA and a CTAB-HSA-AuNR network. ζ-potential values confirm surface modification, implying protein corona formation on nanorods. The thin films were also characterized using SEM, AFM, SAXS, XPS, FTIR, and TGA studies. SEM images show a smooth surface with a reduced number of pores, indicating the compactness of the deposited structure. AFM shows two different structural pattern formations with the deposition, indicating possible self-assembly of the protein-conjugated nanoparticles. FTIR studies indicate a change in the hydrogen bonding network and confirm the CTAB-HSA-AuNR complex network formation. The XPS studies indicate Au-S bond formation, along with Au-S-S-Au interactions. SAXS studies indicate the formation of aggregates (oligomers), as well as the presence of dominant attractive intermolecular interactions in the thin films.
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Affiliation(s)
- Krishna Halder
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Kabira Sabnam
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Abhirup Das
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Dipak K Goswami
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Swagata Dasgupta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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Slapničar Š, Žerjav G, Zavašnik J, Roškarič M, Finšgar M, Pintar A. Novel TiO 2-Supported Gold Nanoflowers for Efficient Photocatalytic NO x Abatement. Molecules 2024; 29:3333. [PMID: 39064911 DOI: 10.3390/molecules29143333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 07/10/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
In this study, we pioneered the synthesis of nanoflower-shaped TiO2-supported Au photocatalysts and investigated their properties. Au nanoflowers (Au NFs) were prepared by a Na-citrate and hydroquinone-based preparation method, followed by wet impregnation of the derived Au NFs on the surface of TiO2 nanorods (TNR). A uniform and homogeneous distribution of Au NFs was observed in the TNR + NF(0.7) sample (lower Na-citrate concentration), while their distribution was heterogeneous in the TNR + NF(1.4) sample (higher Na-citrate concentration). The UV-Vis DR spectra revealed the size- and shape-dependent optical properties of the Au NFs, with the LSPR effect observed in the visible region. The solid-state EPR spectra showed the presence of Ti3+, oxygen vacancies and electron interactions with organic compounds on the catalyst surface. In the case of the TNR + NF(0.7) sample, high photocatalytic activity was observed in the H2-assisted reduction of NO2 to N2 at room temperature under visible-light illumination. In contrast, the TNR + NF(1.4) catalyst as well as the heat-treated samples showed no ability to reduce NO2 under visible light, indicating the presence of deformed Au NFs limiting the LSPR effect. These results emphasized the importance of the choice of synthesis method, as this could strongly influence the photocatalytic activity of the Au NFs.
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Affiliation(s)
- Špela Slapničar
- Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia
| | - Gregor Žerjav
- Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia
| | - Janez Zavašnik
- Gaseous Electronics, Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Matevž Roškarič
- Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia
| | - Matjaž Finšgar
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - Albin Pintar
- Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova ulica 19, 1001 Ljubljana, Slovenia
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3
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Liu Y, Liu Z, Zhang J, Xiao FS, Cao X, Wang L. Efficient Catalytic Production of Hydrogen Peroxide Using Tin-containing Zeolite Fixed Palladium Nanoparticles with Oxidation Resistance. Angew Chem Int Ed Engl 2023; 62:e202312377. [PMID: 37796132 DOI: 10.1002/anie.202312377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 10/06/2023]
Abstract
The metal surfaces tend to be oxidized in air through dissociation of the O-O bond of oxygen to reduce the performances in various fields. Although several ligand modification routes have alleviated the oxidation of bulky metal surfaces, it is still a challenge for the oxidation resistance of small-size metal nanoparticles. Herein, we fixed the small-size Pd nanoparticles in tin-contained MFI zeolite crystals, where the tin acts as an electron donor to efficiently hinder the oxidation of Pd by weakening the adsorption of molecular oxygen and suppressing the O-O cleavage. This oxidation-resistant Pd catalyst exhibited superior performance in directly synthesizing hydrogen peroxide from hydrogen and oxygen, with the productivity of hydrogen peroxide at ≈10,170 mmol gPd -1 h-1 , steadily outperforming the catalysts tested previously. This work leads to the hypothesis that tin is an electron donor to realize oxidation-resistant Pd within zeolite crystals for efficient catalysis to overcome the limitation of generally supported Pd catalysts and further motivates the use of oxidation-resistant metal nanoparticles in various fields.
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Affiliation(s)
- Yifeng Liu
- Key Lab of Applied Chemistry of Zhejiang Province and Department of Chemistry &, Key Lab of Biomass Chemical Engineering of Ministry of Education and College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Zhaoqing Liu
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, East China University of Science and Technology, Shanghai, 200237, China
| | - Jian Zhang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Feng-Shou Xiao
- Key Lab of Applied Chemistry of Zhejiang Province and Department of Chemistry &, Key Lab of Biomass Chemical Engineering of Ministry of Education and College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiaoming Cao
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, East China University of Science and Technology, Shanghai, 200237, China
| | - Liang Wang
- Key Lab of Applied Chemistry of Zhejiang Province and Department of Chemistry &, Key Lab of Biomass Chemical Engineering of Ministry of Education and College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
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Chataoui H, Mekkaoui AA, Elmouli H, Bahsis L, Anane H, El Houssame S. A DFT investigation of the catalytic oxidation of benzyl alcohol using graphene oxide. J Mol Model 2023; 29:288. [PMID: 37610432 DOI: 10.1007/s00894-023-05693-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 08/11/2023] [Indexed: 08/24/2023]
Abstract
CONTEXT Metal-free heterogeneous materials have attracted great interest due to their potential to facilitate various organic transformations in line with circular economy and green chemistry principles. Among various 2D materials, graphene oxide (GO) is considered an attractive material for numerous applications in physics, chemistry, biology, material sciences, and catalysis. Furthermore, graphene-based catalysts exhibit good catalytic activity toward the selective oxidation of benzyl alcohol to benzaldehyde or benzoic acid under eco-friendly conditions. In this regard, a theoretical investigation was carried out to study both catalytic oxidation reaction pathways (i.e., benzyl alcohols to aldehyde and to benzoic acid) using GO as an eco-friendly and metal-free catalyst. METHODS In this study, we report a theoretical investigation at the B3LYP/6-31G level to better understand the oxidation of benzyl alcohol using GO as a metal-free catalyst. The possible bond formation was investigated using the global and local reactivity indexes derived from Fukui functions. Furthermore, we performed a non-covalent interaction (NCI) analysis to unveil the stability and the interaction nature between both reagents and GO surface. The effect of the solvent on the oxidation efficiency was also performed and the results indicate that the solvent significantly affects the decrease of reactivity by increasing the activation barriers through oxidation reactions of benzyl alcohol. Additionally, the electron localization function (ELF) analysis was performed for all intermediates showing the ionic nature of the studied epoxide structure of GO and rules out any type of covalent interaction during the oxidation reaction of benzyl alcohol. All these obtained results are in good agreement with experimental observations and reveal that the epoxide functions on the graphene surface promote an excellent catalyst turnover.
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Affiliation(s)
- Hassan Chataoui
- Laboratoire Des Sciences Des Matériaux, Mathématiques Et Environnement, Faculté Polydisciplinaire de Khouribga, Université Sultan Moulay Slimane, BP 145, 25000, Khouribga, Morocco
| | - Ayoub Abdelkader Mekkaoui
- Laboratoire de Chimie Moléculaire, Equipe de Chimie de Coordination Et de Catalyse, Département de Chimie, Faculté Des Sciences Semlalia, Université Cadi Ayyad, BP 2390, 40001, Marrakech, Morocco
| | - Hamid Elmouli
- Laboratoire de Chimie Analytique Et Moléculaire, LCAM, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Safi, Morocco
| | - Lahoucine Bahsis
- Laboratoire de Chimie Analytique Et Moléculaire, LCAM, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Safi, Morocco
| | - Hafid Anane
- Laboratoire de Chimie Analytique Et Moléculaire, LCAM, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Safi, Morocco
| | - Soufiane El Houssame
- Laboratoire Des Sciences Des Matériaux, Mathématiques Et Environnement, Faculté Polydisciplinaire de Khouribga, Université Sultan Moulay Slimane, BP 145, 25000, Khouribga, Morocco.
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Datta S, Mahin J, Liberti E, Manasi I, Edler KJ, Torrente-Murciano L. Role of the Deep Eutectic Solvent Reline in the Synthesis of Gold Nanoparticles. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2023; 11:10242-10251. [PMID: 37476420 PMCID: PMC10354802 DOI: 10.1021/acssuschemeng.2c07337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 05/26/2023] [Indexed: 07/22/2023]
Abstract
This work presents a mechanistic understanding of the synthesis of small (<3 nm) gold nanoparticles in a nontoxic, eco-friendly, and biodegradable eutectic mixture of choline chloride and urea (reline) without the addition of external reducing or stabilization agents. Reline acts as a reducing agent by releasing ammonia (via urea hydrolysis), forming gold nanoparticles even at trace ammonia concentration levels. Reline also affects the speciation of the gold precursor forming gold chloro-complexes, stabilizing Au+ species, leading to an easier reduction and avoiding the otherwise fast disproportionation reaction. Such a capability is however lost in the presence of large amounts of water, where water replaces the chloride ligands in the precursor speciation. In addition, reline acts as a weak stabilizing agent, leading to small particles (<3 nm) and narrow distributions although agglomerates quickly form. Such properties are maintained in the presence of water, indicating that it is linked to the urea stabilization rather than the hydrogen-bonding network. This work has important implications in the field of green synthesis of nanoparticles with small sizes, especially for biomedical and health care applications, due to the nontoxic nature of the components of deep eutectic solvents in contrast to the conventional routes.
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Affiliation(s)
- Sukanya Datta
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB3 0AS Cambridge, U.K.
| | - Julien Mahin
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB3 0AS Cambridge, U.K.
| | - Emanuela Liberti
- Department
of Materials, University of Oxford, OX1 3PH Oxford U.K.
- The
Rosalind Franklin Institute, Harwell Science & Innovation Campus, Didcot, OX11 0QS Oxfordshire, U.K.
| | - Iva Manasi
- Department
of Chemistry, University of Bath, Claverton Down Road, BA2 7AY Bath, U.K.
| | - Karen J. Edler
- Department
of Chemistry, University of Bath, Claverton Down Road, BA2 7AY Bath, U.K.
| | - Laura Torrente-Murciano
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB3 0AS Cambridge, U.K.
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Richard AJ, Ferguson M, Fiss BG, Titi HM, Valdez J, Provatas N, Friščić T, Moores A. In situ study of Au nanoparticle formation in a mechanochemical-aging-based method. NANOSCALE ADVANCES 2023; 5:2776-2784. [PMID: 37205288 PMCID: PMC10187004 DOI: 10.1039/d2na00759b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 03/14/2023] [Indexed: 05/21/2023]
Abstract
As we strive to perform chemical transformations in a more sustainable fashion, enabling solid-state reactions through mechanochemistry has emerged as a highly successful approach. Due to the wide-ranging applications of gold nanoparticles (AuNPs), mechanochemical strategies have already been employed for their synthesis. However, the underlying processes surrounding gold salt reduction, nucleation and growth of AuNPs in the solid state are yet to be understood. Here, we present a mechanically activated aging synthesis of AuNPs, through a solid-state Turkevich reaction. Solid reactants are only briefly exposed to input of mechanical energy before being aged statically over a period of six weeks at different temperatures. This system offers an excellent opportunity for an in situ analysis of both reduction and nanoparticle formation processes. During the aging period, the reaction was monitored using a combination of X-ray photoelectron spectroscopy, diffuse reflectance spectroscopy, powder X-ray diffraction and transmission electron microscopy, to gain meaningful insights into the mechanisms of solid-state formation of gold nanoparticles. The acquired data allowed for the establishment of the first kinetic model for solid-state nanoparticle formation.
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Affiliation(s)
- Austin J Richard
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University 801 Sherbrooke Street West Montréal Québec H3A 0B8 Canada
| | - Michael Ferguson
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University 801 Sherbrooke Street West Montréal Québec H3A 0B8 Canada
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Blaine G Fiss
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University 801 Sherbrooke Street West Montréal Québec H3A 0B8 Canada
| | - Hatem M Titi
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University 801 Sherbrooke Street West Montréal Québec H3A 0B8 Canada
| | - Jesus Valdez
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University 801 Sherbrooke Street West Montréal Québec H3A 0B8 Canada
- Facility for Electron Microscopy Research, McGill University 3640 University Street Montréal Québec H3A0C7 Canada
| | - Nikolas Provatas
- Department of Physics, McGill University 3600 University Street Montréal Québec H3A 2T8 Canada
- McGill High Performance Computing Centre, École de Technologie Supérieure (ETS) 1100 Notre Dame Street West Montréal Québec H3C 1K3 Canada
| | - Tomislav Friščić
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University 801 Sherbrooke Street West Montréal Québec H3A 0B8 Canada
- School of Chemistry, University of Birmingham Edgbaston Birmingham B15 2TT UK
| | - Audrey Moores
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University 801 Sherbrooke Street West Montréal Québec H3A 0B8 Canada
- Department of Materials Engineering, McGill University 3610 University Street Montréal Québec H3A 0C5 Canada
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7
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Ferguson M, Richard AJ, Valdez J, Fiss BG, Titi HM, Provatas N, Friščić T, Moores A. Direct observation by high resolution transmission electron microscopy of gold(III) particle transformation during aging reduction reaction. Faraday Discuss 2023; 241:278-288. [PMID: 36218357 DOI: 10.1039/d2fd00126h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We use a gold nanoparticle synthesis as a model system to study the morphological and compositional changes in gold(III) precursor particles, while reduction is taking place during aging after mechanical activation. Scanning transmission electron microscopy coupled with a high-angle annular dark field detector revealed the nanoscale changes in particle morphology, while electron energy loss spectroscopy mapped the changes in the chemical landscape during the reduction process. Tracking a specific region of interest on the sample grid allowed for comparisons to be made of the same particles across a two day monitoring period. High-angle annular dark field images permitted the visualization of particle size reduction of the gold salt while electron energy loss spectroscopy captured the surprising mobility of the lighter chlorine and sodium ions in a solid matrix during the reduction process. This system offers unique insight into precursor particle reactivity in the solid phase, which is relevant for many mechanochemical and aging-based reactions.
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Affiliation(s)
- Michael Ferguson
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada.
| | - Austin J Richard
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada.
| | - Jesus Valdez
- Facility for Electron Microscopy Research, McGill University, 3640 University Street, Montréal, Québec H3A 0C7, Canada
| | - Blaine G Fiss
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada.
| | - Hatem M Titi
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada.
| | - Nikolas Provatas
- Department of Physics, McGill University, 3600 University Street, Montréal, Québec H3A 2T8, Canada.,McGill High Performance Computing Centre, École de Technologie Supérieure (ETS), 1100 Notre Dame Street West, Montréal, Québec H3C 1K3, Canada
| | - Tomislav Friščić
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada.
| | - Audrey Moores
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada. .,Department of Materials Engineering, McGill University, 3610 University Street, Montréal, Québec H3A 0C5, Canada
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Ali T, Wang H, Iqbal W, Bashir T, Shah R, Hu Y. Electro-Synthesis of Organic Compounds with Heterogeneous Catalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 10:e2205077. [PMID: 36398622 PMCID: PMC9811472 DOI: 10.1002/advs.202205077] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/19/2022] [Indexed: 06/16/2023]
Abstract
Electro-organic synthesis has attracted a lot of attention in pharmaceutical science, medicinal chemistry, and future industrial applications in energy storage and conversion. To date, there has not been a detailed review on electro-organic synthesis with the strategy of heterogeneous catalysis. In this review, the most recent advances in synthesizing value-added chemicals by heterogeneous catalysis are summarized. An overview of electrocatalytic oxidation and reduction processes as well as paired electrocatalysis is provided, and the anodic oxidation of alcohols (monohydric and polyhydric), aldehydes, and amines are discussed. This review also provides in-depth insight into the cathodic reduction of carboxylates, carbon dioxide, CC, C≡C, and reductive coupling reactions. Moreover, the electrocatalytic paired electro-synthesis methods, including parallel paired, sequential divergent paired, and convergent paired electrolysis, are summarized. Additionally, the strategies developed to achieve high electrosynthesis efficiency and the associated challenges are also addressed. It is believed that electro-organic synthesis is a promising direction of organic electrochemistry, offering numerous opportunities to develop new organic reaction methods.
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Affiliation(s)
- Tariq Ali
- Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsDepartment of ChemistryZhejiang Normal UniversityJinhua321004China
| | - Haiyan Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsDepartment of ChemistryZhejiang Normal UniversityJinhua321004China
| | - Waseem Iqbal
- Dipartimento di Chimica e Tecnologie ChimicheUniversità della CalabriaRendeCS87036Italy
| | - Tariq Bashir
- Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou215006China
| | - Rahim Shah
- Institute of Chemical SciencesUniversity of SwatSwatKhyber Pakhtunkhwa19130Pakistan
| | - Yong Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsDepartment of ChemistryZhejiang Normal UniversityJinhua321004China
- Hangzhou Institute of Advanced StudiesZhejiang Normal UniversityHangzhou311231China
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Design of a gold clustering site in an engineered apo-ferritin cage. Commun Chem 2022; 5:39. [PMID: 36697940 PMCID: PMC9814837 DOI: 10.1038/s42004-022-00651-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 02/18/2022] [Indexed: 01/28/2023] Open
Abstract
Water-soluble and biocompatible protein-protected gold nanoclusters (Au NCs) hold great promise for numerous applications. However, design and precise regulation of their structure at an atomic level remain challenging. Herein, we have engineered and constructed a gold clustering site at the 4-fold symmetric axis channel of the apo-ferritin cage. Using a series of X-ray crystal structures, we evaluated the stepwise accumulation process of Au ions into the cage and the formation of a multinuclear Au cluster in our designed cavity. We also disclosed the role of key residues in the metal accumulation process. X-ray crystal structures in combination with quantum chemical (QC) calculation revealed a unique Au clustering site with up to 12 Au atoms positions in the cavity. Moreover, the structure of the gold nanocluster was precisely tuned by the dosage of the Au precursor. As the gold concentration increases, the number of Au atoms position at the clustering site increases from 8 to 12, and a structural rearrangement was observed at a higher Au concentration. Furthermore, the binding affinity order of the four Au binding sites on apo-ferritin was unveiled with a stepwise increase of Au precursor concentration.
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10
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Photothermal/NO combination therapy from plasmonic hybrid nanotherapeutics against breast cancer. J Control Release 2022; 345:417-432. [PMID: 35331784 DOI: 10.1016/j.jconrel.2022.03.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/29/2022] [Accepted: 03/15/2022] [Indexed: 11/20/2022]
Abstract
In this study, a plasmon-semiconductor nanotheranostic system comprising Au nanostars/graphene quantum dots (AuS/QD) hybrid nanoparticles loaded with BNN6 and surface modified with PEG-pyrene was developed for the photo-triggered hyperthermia effect and NO production as the dual modality treatment against orthotopic triple-negative breast cancer. The structure and morphology of the hybrid nanodevice was characterized and the NIR-II induced thermal response and NO production was determined. The hybrid nanodevice has shown enhanced plasmonic energy transfer from localized surface plasmonic resonance of Au nanostars to QD semiconductor that activates the BNN6 species loaded on QD surfaces, leading to the effective NO production and the gas therapy in addition to the photothermal response. The increased accumulation of the NIR-II-responsive hybrid nanotheranostic in tumor via the enhanced permeation and retention effects was confirmed by both in vivo fluorescence and photoacoustic imaging. The prominent therapeutic efficacy of the photothermal/NO combination therapy from the BNN6-loaded AuS@QD nanodevice with the NIR-II laser irradiation at 1064 nm against 4T1 breast cancer was observed both in vitro and in vivo. The NO therapy for the cancer treatment was evidenced with the increased cellular nitrosative and oxidative stress, nitration of tyrosine residues of mitochondrial proteins, vessel eradication and cell apoptosis. The efficacy of the photothermal treatment was corroborated directly by severe tissue thermal ablation and tumor growth inhibition. The NIR-II triggered thermal/NO combination therapy along with the photoacoustic imaging-guided therapeutic accumulation in tumor shows prominent effect to fully inhibit tumor growth and validates the promising strategy developed in this study.
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11
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Richards T, Lewis RJ, Morgan DJ, Hutchings GJ. The Direct Synthesis of Hydrogen Peroxide Over Supported Pd-Based Catalysts: An Investigation into the Role of the Support and Secondary Metal Modifiers. Catal Letters 2022. [DOI: 10.1007/s10562-022-03967-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AbstractThe direct synthesis of H2O2 from molecular H2 and O2 over Pd-based catalysts, prepared via an industrially relevant, excess chloride co-impregnation procedure is investigated. Initial studies into the well-established PdAu system demonstrated the key role of Pd: Au ratio on catalytic activity, under conditions that have previously been found to be optimal for H2O2 formation. Further investigations using the optimal Pd: Au ratio identified the role of the catalyst support in controlling particle size and Pd oxidation state and thus catalytic performance. Subsequently, with an aim to replace Au with cheaper alternatives, the alloying of Pd with more abundant secondary metals is explored.
Graphical Abstract
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Kusada K, Kitagawa H. Continuous-flow syntheses of alloy nanoparticles. MATERIALS HORIZONS 2022; 9:547-558. [PMID: 34812460 DOI: 10.1039/d1mh01413g] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Alloy nanoparticles (NPs), including core-shell, segregated and solid-solution types, show a variety of attractive properties such as catalytic and optical properties and are used in a wide range of applications. Precise control and good reproducibility in the syntheses of alloy NPs are highly demanded because these properties are tunable by controlling alloy structures, compositions, particle sizes, and so on. To improve the efficiency and reproducibility of their syntheses, continuous-flow syntheses with various types of reactors have recently been developed instead of the current mainstream approach, batch syntheses. In this review, we focus on the continuous-flow syntheses of alloy NPs and first overview the flow syntheses of NPs, especially of alloy NPs. Subsequently, the details of flow reactors and their chemistry to synthesize core-shell, segregated, solid-solution types of alloy NPs, and high-entropy alloy NPs are introduced. Finally, the challenges and future perspectives in this field are discussed.
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Affiliation(s)
- Kohei Kusada
- The Hakubi Centre for Advanced Research, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
- PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hiroshi Kitagawa
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan.
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13
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Ye Z, Li C, Celentano M, Lindley M, O’Reilly T, Greer AJ, Huang Y, Hardacre C, Haigh SJ, Xu Y, Bell SEJ. Surfactant-free Synthesis of Spiky Hollow Ag-Au Nanostars with Chemically Exposed Surfaces for Enhanced Catalysis and Single-Particle SERS. JACS AU 2022; 2:178-187. [PMID: 35098234 PMCID: PMC8791058 DOI: 10.1021/jacsau.1c00462] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Indexed: 06/14/2023]
Abstract
Spiky/hollow metal nanoparticles have applications across a broad range of fields. However, the current bottom-up methods for producing spiky/hollow metal nanoparticles rely heavily on the use of strongly adsorbing surfactant molecules, which is undesirable because these passivate the product particles' surfaces. Here we report a high-yield surfactant-free synthesis of spiky hollow Au-Ag nanostars (SHAANs). Each SHAAN is composed of >50 spikes attached to a hollow ca. 150 nm diameter cubic core, which makes SHAANs highly plasmonically and catalytically active. Moreover, the surfaces of SHAANs are chemically exposed, which gives them significantly enhanced functionality compared with their surfactant-capped counterparts, as demonstrated in surface-enhanced Raman spectroscopy (SERS) and catalysis. The chemical accessibility of the pristine SHAANs also allows the use of hydroxyethyl cellulose as a weakly bound stabilizing agent. This produces colloidal SHAANs that remain stable for >1 month while retaining the functionalities of the pristine particles and allows even single-particle SERS to be realized.
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Affiliation(s)
- Ziwei Ye
- School
of Chemistry and Chemical Engineering, Queen’s
University of Belfast, University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Chunchun Li
- School
of Chemistry and Chemical Engineering, Queen’s
University of Belfast, University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Maurizio Celentano
- School
of Chemistry and Chemical Engineering, Queen’s
University of Belfast, University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Matthew Lindley
- Department
of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, United
Kingdom
| | - Tamsin O’Reilly
- School
of Chemistry and Chemical Engineering, Queen’s
University of Belfast, University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Adam J. Greer
- Department
of Chemical Engineering & Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Yiming Huang
- School
of Chemistry and Chemical Engineering, Queen’s
University of Belfast, University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Christopher Hardacre
- Department
of Chemical Engineering & Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Sarah J. Haigh
- Department
of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, United
Kingdom
| | - Yikai Xu
- School
of Chemistry and Chemical Engineering, Queen’s
University of Belfast, University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
| | - Steven E. J. Bell
- School
of Chemistry and Chemical Engineering, Queen’s
University of Belfast, University Road, Belfast BT9 5AG, Northern Ireland, United Kingdom
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14
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Gohain SB, Boruah PK, Das MR, Thakur AJ. Gold-coated iron oxide core–shell nanostructures for the oxidation of indoles and the synthesis of uracil-derived spirooxindoles. NEW J CHEM 2022. [DOI: 10.1039/d1nj05205e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of isatins and uracil-based spirooxindoles catalysed by Au/Fe3O4 core–shell nanoparticles under mild conditions and low reaction times.
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Affiliation(s)
| | - Purna Kanta Boruah
- Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology (NEIST), Jorhat 785006, Assam, India
| | - Manash Ranjan Das
- Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science and Technology (NEIST), Jorhat 785006, Assam, India
| | - Ashim Jyoti Thakur
- Department of Chemical Sciences, Tezpur University, Napaam, Assam, 784028, India
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15
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Santos A, Lewis RJ, Morgan DJ, Davies TE, Hampton E, Gaskin P, Hutchings GJ. The oxidative degradation of phenol via in situ H 2O 2 synthesis using Pd supported Fe-modified ZSM-5 catalysts. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00283c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bifunctional Pd/Fe-ZSM-5 catalysts promote pollutant degradation through in situ H2O2 synthesis.
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Affiliation(s)
- Alba Santos
- Max Planck centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Richard J. Lewis
- Max Planck centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - David J. Morgan
- Max Planck centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
- HarwellXPS, Research Complex at Harwell (RCaH), Didcot, OX11 OFA, UK
| | - Thomas E. Davies
- Max Planck centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Euan Hampton
- Dŵr Cymru Welsh Water, Pentwyn Road, Nelson, Treharris, CF46 6LY, UK
| | - Paul Gaskin
- Dŵr Cymru Welsh Water, Pentwyn Road, Nelson, Treharris, CF46 6LY, UK
| | - Graham J. Hutchings
- Max Planck centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
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16
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Lewis RJ, Ntainjua EN, Morgan DJ, Davies TE, Carley AF, Freakley SJ, Hutchings GJ. Improving the performance of Pd based catalysts for the direct synthesis of hydrogen peroxide via acid incorporation during catalyst synthesis. CATAL COMMUN 2021. [DOI: 10.1016/j.catcom.2021.106358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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17
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Lee HW, Jung E, Han GH, Kim MC, Kim D, Lee KY, Han SS, Yu T. Three-in-One Strategy to Improve Both Catalytic Activity and Selectivity: Nonconcentric Pd-Au Nanoparticles. J Phys Chem Lett 2021; 12:11098-11105. [PMID: 34752106 DOI: 10.1021/acs.jpclett.1c03256] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In direct H2O2 synthesis, the Pd-Au alloy was considered as a potential catalyst because of its much better performance compared to the prototype Pd; unfortunately, achieving both high activity and selectivity remains a challenge. Here, we synthesized nonconcentric Pd-Au NPs in which Au domain shells are formed only partially on Pd domain cores and tested them for direct H2O2 synthesis. It has three exposed regions of Pd, Au domains, and Pd-Au interfaces in a single NP (hence, a 3-in-1 strategy). Creating nonconcentric forms was demonstrated convincingly by density functional theory calculations. The nonconcentric Pd-Au particles exhibit high and well-balanced performances that are hard to achieve with traditional alloyed Pd-Au. The number of Pd/Au interfaces was found to be the key factor and thus was optimized by controlling the Au precursor concentrations. The hitherto underutilized structure of nonconcentric bimetallic alloys can be useful and thus should be more actively investigated for catalyst development.
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Affiliation(s)
- Hong Woo Lee
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
| | - Euiyoung Jung
- Department of Chemical Engineering, Integrated Engineering Major, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Geun-Ho Han
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
| | - Min-Cheol Kim
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Donghun Kim
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Kwan-Young Lee
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seoul 02841, Republic of Korea
| | - Sang Soo Han
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Taekyung Yu
- Department of Chemical Engineering, Integrated Engineering Major, Kyung Hee University, Yongin 17104, Republic of Korea
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18
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Richards T, Harrhy JH, Lewis RJ, Howe AGR, Suldecki GM, Folli A, Morgan DJ, Davies TE, Loveridge EJ, Crole DA, Edwards JK, Gaskin P, Kiely CJ, He Q, Murphy DM, Maillard JY, Freakley SJ, Hutchings GJ. A residue-free approach to water disinfection using catalytic in situ generation of reactive oxygen species. Nat Catal 2021. [DOI: 10.1038/s41929-021-00642-w] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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19
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Brehm J, Lewis RJ, Morgan DJ, Davies TE, Hutchings GJ. The Direct Synthesis of Hydrogen Peroxide over AuPd Nanoparticles: An Investigation into Metal Loading. Catal Letters 2021. [DOI: 10.1007/s10562-021-03632-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AbstractThe direct synthesis of H2O2 from molecular H2 and O2 over AuPd catalysts, supported on TiO2 and prepared via an excess chloride co-impregnation procedure is investigated. The role of Au:Pd ratio on the catalytic activity towards H2O2 formation and its subsequent degradation is evaluated under conditions that have previously been found to be optimal for the formation of H2O2. The combination of relatively small nanoparticles, of mixed Pd-oxidation state is shown to correlate with enhanced catalytic performance. Subsequently, a detailed study of catalytic activity towards H2O2 synthesis as a function of AuPd loading was conducted, with a direct correlation between catalytic activity and metal loading observed.
Graphic Abstract
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20
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Guadix‐Montero S, Santos Hernandez A, Lei N, Morgan DJ, He Q, Wang A, Zhang T, Roldan A, Sankar M. Controlling the Selectivity of Supported Ru Nanoparticles During Glycerol Hydrogenolysis: C−O
vs
C−C Cleavage. ChemCatChem 2021. [DOI: 10.1002/cctc.202001881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Susana Guadix‐Montero
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
| | - Alba Santos Hernandez
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
| | - Nian Lei
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian Liaoning 116023 P. R. China
| | - David J. Morgan
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
| | - Qian He
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
- Department of Materials Science and Engineering National University of Singapore Singapore 117575 Singapore
| | - Aiqin Wang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian Liaoning 116023 P. R. China
- Dalian National Laboratory for Clean Energy 457 Zhongshan Road Dalian 116023 P. R. China
| | - Tao Zhang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian Liaoning 116023 P. R. China
| | - Alberto Roldan
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
| | - Meenakshisundaram Sankar
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
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21
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Shin D, Kim HR, Hong BH. Gold nanoparticle-mediated non-covalent functionalization of graphene for field-effect transistors. NANOSCALE ADVANCES 2021; 3:1404-1412. [PMID: 36132857 PMCID: PMC9419278 DOI: 10.1039/d0na00603c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 01/08/2021] [Indexed: 06/13/2023]
Abstract
Since its discovery, graphene has attracted much attention due to its unique electrical transport properties that can be applied to high-performance field-effect transistors (FETs). However, mounting chemical functionalities onto graphene inevitably involves the breaking of sp2 bonds, resulting in the degradation of the mechanical and electrical properties compared to pristine graphene. Here, we report a new strategy to chemically functionalize graphene for use in FETs without affecting the electrical performance. The key idea is to control the Fermi level of the graphene using the consecutive treatment of gold nanoparticles (AuNPs) and thiol-SAM (self-assembled monolayer) molecules, inducing positive and negative doping effects, respectively, by flipping the electric dipoles between AuNPs and SAMs. Based on this method, we demonstrate a Dirac voltage switcher on a graphene FET using heavy metal ions on functionalized graphene, where the carboxyl functional groups of the mediating SAMs efficiently form complexes with the metal ions and, as a result, the Dirac voltage can be positively shifted by different charge doping on graphene. We believe that the nanoparticle-mediated SAM functionalization of graphene can pave the way to developing high-performance chemical, environmental, and biological sensors that fully utilize the pristine properties of graphene.
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Affiliation(s)
- Dongha Shin
- Division of Fine Chemistry and Engineering, Pai Chai University Daejeon 35345 Republic of Korea
| | - Hwa Rang Kim
- Department of Chemistry, Seoul National University Seoul 08826 Korea
- Graphene Research Center & Graphene Square Inc., Advanced Institute of Convergence Technology, Seoul National University Suwon 16229 Korea
| | - Byung Hee Hong
- Department of Chemistry, Seoul National University Seoul 08826 Korea
- Graphene Research Center & Graphene Square Inc., Advanced Institute of Convergence Technology, Seoul National University Suwon 16229 Korea
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22
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Crombie CM, Lewis RJ, Taylor RL, Morgan DJ, Davies TE, Folli A, Murphy DM, Edwards JK, Qi J, Jiang H, Kiely CJ, Liu X, Skjøth-Rasmussen MS, Hutchings GJ. Enhanced Selective Oxidation of Benzyl Alcohol via In Situ H 2O 2 Production over Supported Pd-Based Catalysts. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04586] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Caitlin M. Crombie
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Richard J. Lewis
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Rebekah L. Taylor
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - David J. Morgan
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
- HarwellXPS, Research Complex at Harwell (RCaH), Didcot OX11 OFA, United Kingdom
| | - Thomas E. Davies
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Andrea Folli
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Damien M. Murphy
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Jennifer K. Edwards
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Jizhen Qi
- i-Lab, CAS center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, 215123 Suzhou, People’s Republic of China
| | - Haoyu Jiang
- In-situ Center for Physical Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 200240, 800 Dongchuan
Road. Minhang District, Shanghai, People’s Republic of China
| | - Christopher J. Kiely
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Xi Liu
- In-situ Center for Physical Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 200240, 800 Dongchuan
Road. Minhang District, Shanghai, People’s Republic of China
| | | | - Graham J. Hutchings
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
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23
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Morphology of Ga 2O 3 Nanowires and Their Sensitivity to Volatile Organic Compounds. NANOMATERIALS 2021; 11:nano11020456. [PMID: 33670141 PMCID: PMC7916880 DOI: 10.3390/nano11020456] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 02/06/2021] [Accepted: 02/08/2021] [Indexed: 12/25/2022]
Abstract
Gas sensitive structures made of nanowires exhibit extremally large specific surface area, and a great number of chemically active centres that can react with the ambient atmosphere. This makes the use of nanomaterials promising for super sensitive gas sensor applications. Monoclinic β-Ga2O3 nanowires (NWs) were synthesized from metallic gallium at atmospheric pressure in the presence of nitrogen and water vapor. The nanowires were grown directly on interdigitated gold electrodes screen printed on Al2O3 substrates, which constituted the gas sensor structure. The observations made with transmission electron microscope (TEM) have shown that the nanowires are monocrystalline and their diameters vary from 80 to 300 nm with the average value of approximately 170 nm. Au droplets were found to be anchored at the tips of the nanowires which may indicate that the nanowires followed the Vapor-Liquid-Solid (VLS) mechanism of growth. The conductivity of β-Ga2O3 NWs increases in the presence of volatile organic compounds (VOC) even in the temperature below 600 °C. The gas sensor based on the synthesized β-Ga2O3 NWs shows peak sensitivity to 100 ppm of ethanol of 75.1 at 760 °C, while peak sensitivity to 100 ppm of acetone is 27.5 at 690 °C.
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24
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The Selective Oxidation of Cyclohexane via In-situ H2O2 Production Over Supported Pd-based Catalysts. Catal Letters 2021. [DOI: 10.1007/s10562-020-03511-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractThe oxidation of cyclohexane via the in-situ production of H2O2 from molecular H2 and O2 offers an attractive route to the current industrial means of producing cyclohexanone and cyclohexanol (KA oil), key materials in the production of Nylon. The in-situ route has the potential to overcome the significant economic and environmental concerns associated with the use of commercial H2O2, while also allowing for the use of far lower reaction temperatures than those typical of the purely aerobic route to KA oil. Herein we demonstrate the efficacy of a series of bi-functional Pd-based catalysts, which offer appreciable concentrations of KA oil, under conditions where limited activity is observed using O2 alone. In particular the introduction of V into a supported Pd catalyst is seen to improve KA oil concentration by an order of magnitude, compared to the Pd-only analogue. In particular we ascribe this improvement in catalytic performance to the development of Pd domains of mixed oxidation state upon V incorporation as evidenced through X-ray photoelectron spectroscopy.
Graphic Abstract
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25
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Underhill R, Douthwaite M, Lewis RJ, Miedziak PJ, Armstrong RD, Morgan DJ, Freakley SJ, Davies T, Folli A, Murphy DM, He Q, Akdim O, Edwards JK, Hutchings GJ. Ambient base-free glycerol oxidation over bimetallic PdFe/SiO2 by in situ generated active oxygen species. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-020-04333-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AbstractLow temperature oxidation of alcohols over heterogeneous catalysts is exceptionally challenging, particularly under neutral conditions. Herein, we report on an efficient, base-free method to oxidise glycerol over a 0.5%Pd-0.5%Fe/SiO2 catalyst at ambient temperature in the presence of gaseous H2 and O2. The exceptional catalytic performance was attributed to the in situ formation of highly reactive surface-bound oxygenated species, which promote the dehydrogenation on the alcohol. The PdFe bimetallic catalyst was determined to be significantly more active than corresponding monometallic analogues, highlighting the important role both metals have in this oxidative transformation. Fe leaching was confirmed to occur over the course of the reaction but sequestering experiments, involving the addition of bare carbon to the reactions, confirmed that the reaction was predominantly heterogeneous in nature. Investigations with electron paramagnetic resonance spectroscopy suggested that the reactivity in the early stages was mediated by surface-bound reactive oxygen species; no homogeneous radical species were observed in solution. This theory was further evidenced by a direct H2O2 synthesis study, which confirmed that the presence of Fe in the bimetallic catalyst neither improved the synthesis of H2O2 nor promoted its decomposition over the PdFe/SiO2 catalyst.
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26
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Santos A, Lewis RJ, Morgan DJ, Davies TE, Hampton E, Gaskin P, Hutchings GJ. The degradation of phenol via in situ H 2O 2 production over supported Pd-based catalysts. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01897c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxidative degradation of phenol via in situ H2O2 production offers an attractive route to the destruction of organic contaminants in water streams, overcoming the significant concerns associated with traditional water remediation technologies.
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Affiliation(s)
- Alba Santos
- Max Planck Centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Richard J. Lewis
- Max Planck Centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - David J. Morgan
- Max Planck Centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
- HarwellXPS, Research Complex at Harwell (RCaH), Didcot, OX11 OFA, UK
| | - Thomas E. Davies
- Max Planck Centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Euan Hampton
- Dŵr Cymru Welsh Water, Pentwyn Road, Nelson, Treharris, CF46 6LY, UK
| | - Paul Gaskin
- Dŵr Cymru Welsh Water, Pentwyn Road, Nelson, Treharris, CF46 6LY, UK
| | - Graham J. Hutchings
- Max Planck Centre for Fundamental Heterogeneous Catalysis (FUNCAT), Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
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27
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Morphology and Microstructure Evolution of Gold Nanostructures in the Limited Volume Porous Matrices. SENSORS 2020; 20:s20164397. [PMID: 32781722 PMCID: PMC7472280 DOI: 10.3390/s20164397] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/04/2020] [Accepted: 08/05/2020] [Indexed: 12/14/2022]
Abstract
The modern development of nanotechnology requires the discovery of simple approaches that ensure the controlled formation of functional nanostructures with a predetermined morphology. One of the simplest approaches is the self-assembly of nanostructures. The widespread implementation of self-assembly is limited by the complexity of controlled processes in a large volume where, due to the temperature, ion concentration, and other thermodynamics factors, local changes in diffusion-limited processes may occur, leading to unexpected nanostructure growth. The easiest ways to control the diffusion-limited processes are spatial limitation and localized growth of nanostructures in a porous matrix. In this paper, we propose to apply the method of controlled self-assembly of gold nanostructures in a limited pore volume of a silicon oxide matrix with submicron pore sizes. A detailed study of achieved gold nanostructures’ morphology, microstructure, and surface composition at different formation stages is carried out to understand the peculiarities of realized nanostructures. Based on the obtained results, a mechanism for the growth of gold nanostructures in a limited volume, which can be used for the controlled formation of nanostructures with a predetermined geometry and composition, has been proposed. The results observed in the present study can be useful for the design of plasmonic-active surfaces for surface-enhanced Raman spectroscopy-based detection of ultra-low concentration of different chemical or biological analytes, where the size of the localized gold nanostructures is comparable with the spot area of the focused laser beam.
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28
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Guadix-Montero S, Santos-Hernandez A, Folli A, Sankar M. Effect of support acidity during selective hydrogenolysis of glycerol over supported palladium-ruthenium catalysts. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2020; 378:20200055. [PMID: 32623993 PMCID: PMC7422897 DOI: 10.1098/rsta.2020.0055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/20/2020] [Indexed: 06/11/2023]
Abstract
We report the role of the acidity of support during the selectivity hydrogenolysis of glycerol over supported bimetallic palladium-ruthenium (PdRu) catalysts. The PdRu nanoparticles were supported on a series of metal oxides and zeolitic supports via the modified impregnation method and tested for the liquid-phase hydrogenolysis of glycerol using gaseous hydrogen. The relative acid site densities of selected catalysts were determined by ammonia temperature-programmed desorption and pyridine desorption experiments. Based on these studies, we report a direct correlation between the catalytic activity (conversion and 1,2 propane diol yield) and two different acid sites (strong acid sites and very strong acid sites). Besides zeolite-supported catalysts, TiO2 supported PdRu nanoparticles exhibit moderate catalytic activity; however, this catalyst shows high selectivity for the desired C-O bond cleavage to produce C3 products over the undesired C-C bond cleavage to produce < C3 products. This article is part of a discussion meeting issue 'Science to enable the circular economy'.
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Affiliation(s)
- Susana Guadix-Montero
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
| | - Alba Santos-Hernandez
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
| | - Andrea Folli
- School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK
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29
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Khawaji M, Chadwick D. Selective oxidation using Au-Pd catalysts: Role of the support in the stabilization of colloidal Au-Pd NPs. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.08.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Structural and Electronic Properties of Nano-brass: CuxZny (x + y = 11 − 13) Clusters. J CLUST SCI 2020. [DOI: 10.1007/s10876-019-01698-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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31
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Caswell T, Dlamini MW, Miedziak PJ, Pattisson S, Davies PR, Taylor SH, Hutchings GJ. Enhancement in the rate of nitrate degradation on Au- and Ag-decorated TiO 2 photocatalysts. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02473e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The solar-driven reduction of nitrate to nitrogen has been studied in the presence of a formate hole scavenger, over a series of Au- and Ag-decorated TiO2 catalysts.
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Affiliation(s)
- Thomas Caswell
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | | | - Peter J. Miedziak
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Samuel Pattisson
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Philip R. Davies
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Stuart H. Taylor
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
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32
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Juska VB, Pemble ME. A dual-enzyme, micro-band array biosensor based on the electrodeposition of carbon nanotubes embedded in chitosan and nanostructured Au-foams on microfabricated gold band electrodes. Analyst 2019; 145:402-414. [PMID: 31755482 DOI: 10.1039/c9an01664c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We report the development of a dual-enzyme electrochemical biosensor based on microfabricated gold band array electrodes which were first modified by gold foam (Au-foam) in order to dramatically increase the active surface area. The resulting nanostructured Au-foam deposits then served as a highly porous 3D matrix for the electrodeposition of a nanocomposite film consisting of multi walled carbon nanotubes embedded in a chitosan matrix (CS:MWCNT) designed to provide a conducting, biocompatible and chemically versatile surface suitable for the attachment of a wide range of chemically or biologically active agents. Finally, a dual enzyme mixture of glucose oxidase (GOx) and horseradish peroxidase (HRP) was immobilised onto the CS:MWCNT nanocomposite film surface. It is shown that the resulting sensing platform developed demonstrates excellent analytical performance in terms of glucose detection with a sensitivity of 261.8 μA mM-1 cm-2 and a reproducibility standard deviation (RSD) of 3.30% as determined over 7 measurements. Furthermore, long term stability studies showed that the electrodes exhibited an effectively unchanged response to glucose detection after some 45 days. The example of glucose detection presented here illustrates the fact that the particular combination of nanostructured materials employed represents a very flexible platform for the attachment of enzymes or indeed any other bioactive agent and as such may form the basis of the fabrication of a wide range of biosensors. Finally, since the platform used is based on lithographically-deposited gold electrodes on silicon, we note that it is also very suitable for further miniaturisation, mass production and packaging- all of which would serve to reduce production costs.
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Affiliation(s)
- Vuslat B Juska
- Tyndall National Institute, University College Cork, Lee Maltings Complex, Dyke Parade, Cork, Ireland. and School of Chemistry, University College Cork, Cork, Ireland
| | - Martyn E Pemble
- Tyndall National Institute, University College Cork, Lee Maltings Complex, Dyke Parade, Cork, Ireland. and School of Chemistry, University College Cork, Cork, Ireland
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33
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Macino M, Barnes AJ, Althahban SM, Qu R, Gibson EK, Morgan DJ, Freakley SJ, Dimitratos N, Kiely CJ, Gao X, Beale AM, Bethell D, He Q, Sankar M, Hutchings GJ. Tuning of catalytic sites in Pt/TiO2 catalysts for the chemoselective hydrogenation of 3-nitrostyrene. Nat Catal 2019. [DOI: 10.1038/s41929-019-0334-3] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Freakley SJ, Kochius S, van Marwijk J, Fenner C, Lewis RJ, Baldenius K, Marais SS, Opperman DJ, Harrison STL, Alcalde M, Smit MS, Hutchings GJ. A chemo-enzymatic oxidation cascade to activate C-H bonds with in situ generated H 2O 2. Nat Commun 2019; 10:4178. [PMID: 31519878 PMCID: PMC6744418 DOI: 10.1038/s41467-019-12120-w] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 08/16/2019] [Indexed: 11/09/2022] Open
Abstract
Continuous low-level supply or in situ generation of hydrogen peroxide (H2O2) is essential for the stability of unspecific peroxygenases, which are deemed ideal biocatalysts for the selective activation of C-H bonds. To envisage potential large scale applications of combined catalytic systems the reactions need to be simple, efficient and produce minimal by-products. We show that gold-palladium nanoparticles supported on TiO2 or carbon have sufficient activity at ambient temperature and pressure to generate H2O2 from H2 and O2 and supply the oxidant to the engineered unspecific heme-thiolate peroxygenase PaDa-I. This tandem catalyst combination facilitates efficient oxidation of a range of C-H bonds to hydroxylated products in one reaction vessel with only water as a by-product under conditions that could be easily scaled.
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Affiliation(s)
- Simon J Freakley
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Svenja Kochius
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
- South African DST-NRF Centre of Excellence in Catalysis, C*Change, University of Cape Town, Private Bag, Rondebosch, 7701, Cape Town, South Africa
| | - Jacqueline van Marwijk
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
- South African DST-NRF Centre of Excellence in Catalysis, C*Change, University of Cape Town, Private Bag, Rondebosch, 7701, Cape Town, South Africa
| | - Caryn Fenner
- South African DST-NRF Centre of Excellence in Catalysis, C*Change, University of Cape Town, Private Bag, Rondebosch, 7701, Cape Town, South Africa
- Centre for Bioprocess Engineering Research (CeBER), Department of Chemical Engineering, University of Cape Town, Private Bag X3, Rondebosch, 7701, Cape Town, South Africa
| | - Richard J Lewis
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Kai Baldenius
- BASF SE, RBW/OS - A 30, Carl-Bosch-Strasse 38, 67056, Ludwigshafen am Rhein, Germany
| | - Sarel S Marais
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
- South African DST-NRF Centre of Excellence in Catalysis, C*Change, University of Cape Town, Private Bag, Rondebosch, 7701, Cape Town, South Africa
| | - Diederik J Opperman
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
- South African DST-NRF Centre of Excellence in Catalysis, C*Change, University of Cape Town, Private Bag, Rondebosch, 7701, Cape Town, South Africa
| | - Susan T L Harrison
- South African DST-NRF Centre of Excellence in Catalysis, C*Change, University of Cape Town, Private Bag, Rondebosch, 7701, Cape Town, South Africa
- Centre for Bioprocess Engineering Research (CeBER), Department of Chemical Engineering, University of Cape Town, Private Bag X3, Rondebosch, 7701, Cape Town, South Africa
| | - Miguel Alcalde
- Department of Biocatalysis, Institute of Catalysis, CSIC, 28049, Madrid, Spain
| | - Martha S Smit
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa.
- South African DST-NRF Centre of Excellence in Catalysis, C*Change, University of Cape Town, Private Bag, Rondebosch, 7701, Cape Town, South Africa.
| | - Graham J Hutchings
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.
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35
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Khawaji M, Chadwick D. Selective catalytic oxidation over Au-Pd/titanate nanotubes and the influence of the catalyst preparation method on the activity. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.11.080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Santos A, Lewis RJ, Malta G, Howe AGR, Morgan DJ, Hampton E, Gaskin P, Hutchings GJ. Direct Synthesis of Hydrogen Peroxide over Au–Pd Supported Nanoparticles under Ambient Conditions. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02211] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Alba Santos
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - Richard J. Lewis
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - Grazia Malta
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - Alexander G. R. Howe
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - David J. Morgan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - Euan Hampton
- Dŵr Cymru Welsh Water, Pentwyn Road, Nelson, Treharris, CF46 6LY, United Kingdom
| | - Paul Gaskin
- Dŵr Cymru Welsh Water, Pentwyn Road, Nelson, Treharris, CF46 6LY, United Kingdom
| | - Graham J. Hutchings
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom
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37
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The Direct Synthesis of H2O2 and Selective Oxidation of Methane to Methanol Using HZSM-5 Supported AuPd Catalysts. Catal Letters 2019. [DOI: 10.1007/s10562-019-02876-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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38
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Nowicka E, Althahban S, Leah TD, Shaw G, Morgan D, Kiely CJ, Roldan A, Hutchings GJ. Benzyl alcohol oxidation with Pd-Zn/TiO 2: computational and experimental studies. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2019; 20:367-378. [PMID: 31068985 PMCID: PMC6493277 DOI: 10.1080/14686996.2019.1598237] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/19/2019] [Accepted: 03/19/2019] [Indexed: 05/22/2023]
Abstract
Pd-Zn/TiO2 catalysts containing 1 wt% total metal loading, but with different Pd to Zn ratios, were prepared using a modified impregnation method and tested in the solvent-free aerobic oxidation of benzyl alcohol. The catalyst with the higher Pd content exhibited an enhanced activity for benzyl alcohol oxidation. However, the selectivity to benzaldehyde was significantly improved with increasing presence of Zn. The effect of reduction temperature on catalyst activity was investigated for the catalyst having a Pd to Zn metal molar ratio of 9:1. It was found that lower reduction temperature leads to the formation of PdZn nanoparticles with a wide particle size distribution. In contrast, smaller PdZn particles were formed upon catalyst reduction at higher temperatures. Computational studies were performed to compare the adsorption energies of benzyl alcohol and the reaction products (benzaldehyde and toluene) on PdZn surfaces to understand the oxidation mechanism and further explain the correlation between the catalyst composition and its activity.
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Affiliation(s)
- Ewa Nowicka
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, UK
| | - Sultan Althahban
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA
- Department of Mechanical Engineering, Jazan University, Jazan, Saudi Arabia
| | - Tom D. Leah
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, UK
| | - Greg Shaw
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, UK
| | - David Morgan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, UK
| | - Christopher J. Kiely
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, UK
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA
| | - Alberto Roldan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, UK
| | - Graham J. Hutchings
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, UK
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39
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Zhu X, Guo Q, Sun Y, Chen S, Wang JQ, Wu M, Fu W, Tang Y, Duan X, Chen D, Wan Y. Optimising surface d charge of AuPd nanoalloy catalysts for enhanced catalytic activity. Nat Commun 2019; 10:1428. [PMID: 30926804 PMCID: PMC6441046 DOI: 10.1038/s41467-019-09421-5] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 03/11/2019] [Indexed: 12/05/2022] Open
Abstract
Understanding the catalytic mechanism of bimetallic nanocatalysts remains challenging. Here, we adopt an adsorbate mediated thermal reduction approach to yield monodispersed AuPd catalysts with continuous change of the Pd-Au coordination numbers embedded in a mesoporous carbonaceous matrix. The structure of nanoalloys is well-defined, allowing for a direct determination of the structure-property relationship. The results show that the Pd single atom and dimer are the active sites for the base-free oxidation of primary alcohols. Remarkably, the d-orbital charge on the surface of Pd serves as a descriptor to the adsorbate states and hence the catalytic performance. The maximum d-charge gain occurred in a composition with 33-50 at% Pd corresponds to up to 9 times enhancement in the reaction rate compared to the neat Pd. The findings not only open an avenue towards the rational design of catalysts but also enable the identification of key steps involved in the catalytic reactions.
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Affiliation(s)
- Xiaojuan Zhu
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Department of Chemistry, Shanghai Normal University, Shanghai, 200234, China
| | - Qishui Guo
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Department of Chemistry, Shanghai Normal University, Shanghai, 200234, China
| | - Yafei Sun
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Department of Chemistry, Shanghai Normal University, Shanghai, 200234, China
| | - Shangjun Chen
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Department of Chemistry, Shanghai Normal University, Shanghai, 200234, China
| | - Jian-Qiang Wang
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Mengmeng Wu
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Department of Chemistry, Shanghai Normal University, Shanghai, 200234, China
| | - Wenzhao Fu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Yanqiang Tang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Xuezhi Duan
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - De Chen
- Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, N-7491, Norway
| | - Ying Wan
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, and Department of Chemistry, Shanghai Normal University, Shanghai, 200234, China.
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40
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Kanungo S, van Haandel L, Hensen EJ, Schouten JC, Neira d'Angelo MF. Direct synthesis of H2O2 in AuPd coated micro channels: An in-situ X-Ray absorption spectroscopic study. J Catal 2019. [DOI: 10.1016/j.jcat.2018.12.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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41
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Mitchell CE, Terranova U, Alshibane I, Morgan DJ, Davies TE, He Q, Hargreaves JSJ, Sankar M, de Leeuw NH. Liquid phase hydrogenation of CO2 to formate using palladium and ruthenium nanoparticles supported on molybdenum carbide. NEW J CHEM 2019. [DOI: 10.1039/c9nj02114k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the development of palladium nanoparticles supported on Mo2C as an active catalyst for the liquid-phase hydrogenation of CO2 to formate under mild reaction conditions (100 °C and 2.0 MPa of a 1 : 1 CO2 : H2 mixture).
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Affiliation(s)
- Claire E. Mitchell
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff CF10 4AT
- UK
| | - Umberto Terranova
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff CF10 4AT
- UK
| | | | - David J. Morgan
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff CF10 4AT
- UK
| | - Thomas E. Davies
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff CF10 4AT
- UK
| | - Qian He
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff CF10 4AT
- UK
| | | | | | - Nora H. de Leeuw
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff CF10 4AT
- UK
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42
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Delparish A, Kanungo S, van der Schaaf J, Neira d'Angelo MF. Towards coupling direct activation of methane with in situ generation of H 2O 2. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01304k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This study aims to shed light on the one-step oxidation of methane to methanol with in situ generated H2O2 by means of a wall-coated catalytic microreactor.
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Affiliation(s)
- Amin Delparish
- Laboratory of Chemical Reactor Engineering
- Department of Chemical Engineering
- Eindhoven University of Technology
- 5600 MB Eindhoven
- The Netherlands
| | - Shamayita Kanungo
- Laboratory of Chemical Reactor Engineering
- Department of Chemical Engineering
- Eindhoven University of Technology
- 5600 MB Eindhoven
- The Netherlands
| | - John van der Schaaf
- Laboratory of Chemical Reactor Engineering
- Department of Chemical Engineering
- Eindhoven University of Technology
- 5600 MB Eindhoven
- The Netherlands
| | - M. Fernanda Neira d'Angelo
- Laboratory of Chemical Reactor Engineering
- Department of Chemical Engineering
- Eindhoven University of Technology
- 5600 MB Eindhoven
- The Netherlands
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43
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Contino A, Maccarrone G, Spitaleri L, Torrisi L, Nicotra G, Gulino A. One Pot Synthesis of Au_ZnO Core‐Shell Nanoparticles Using a Zn Complex Acting as ZnO Precursor, Capping and Reducing Agent During the Formation of Au NPs. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800863] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Annalinda Contino
- Department of Chemical Sciences University of Catania Viale Andrea Doria 6 95125 Catania Italy
| | - Giuseppe Maccarrone
- Department of Chemical Sciences University of Catania Viale Andrea Doria 6 95125 Catania Italy
| | - Luca Spitaleri
- Department of Chemical Sciences University of Catania Viale Andrea Doria 6 95125 Catania Italy
| | - Lucia Torrisi
- STMicroelectronics Stradale Primosole 50 95121 Catania Italy
| | | | - Antonino Gulino
- Department of Chemical Sciences University of Catania Viale Andrea Doria 6 95125 Catania Italy
- INSTM UdR of Catania Viale Andrea Doria 6 95125 Catania Italy
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44
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Liu Y, Liu X, Yang S, Li F, Shen C, Ma C, Huang M, Sand W. Ligand-Free Nano-Au Catalysts on Nitrogen-Doped Graphene Filter for Continuous Flow Catalysis. NANOMATERIALS 2018; 8:nano8090688. [PMID: 30189640 PMCID: PMC6165004 DOI: 10.3390/nano8090688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 09/02/2018] [Accepted: 09/04/2018] [Indexed: 12/24/2022]
Abstract
In this study, the authors rationally designed a high-performance catalytic filter for continuous flow catalysis. The catalytic filter consisted of ligand-free nanoscale gold (nano-Au) catalysts and nitrogen-doped graphene (N-rGO). The Au catalyst was fabricated in situ onto a pre-formed N-rGO support by the NaBH₄ reduction of the Au precursor, and the size of the nano-Au was fine-tuned. A hydrothermal pretreatment of graphene oxide enriched nitrogen-containing species on the surface of two-dimensional graphene supports and enhanced the affinity of Au precursors onto the support via electrocatalytic attraction. The nano-Au catalysts acted as high-performance catalysts, and the N-rGO acted as ideal filter materials to anchor the catalysts. The catalytic activity of the as-designed catalytic filter was evaluated using 4-nitrophenol (4-NP) hydrogenation as a model catalytic reaction. The catalytic filters demonstrated superior catalytic activity and excellent stability, where a complete 4-nitrophenol conversion was readily achieved via a single pass through the catalytic filter. The as-fabricated catalytic filter outperformed the conventional batch reactors due to evidently improved mass transport. Some key operational parameters impacting the catalytic performance were identified and optimized. A similar catalytic performance was also observed for three 4-nitrophenol spiked real water samples (e.g., surface water, tap water, and industrial dyeing wastewater). The excellent catalytic activity of the nano-Au catalysts combined with the two-dimensional and mechanically stable graphene allowed for the rational design of various continuous flow catalytic membranes for potential industrial applications.
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Affiliation(s)
- Yanbiao Liu
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Xiang Liu
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Shengnan Yang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Fang Li
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Chensi Shen
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Chunyan Ma
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Manhong Huang
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
| | - Wolfgang Sand
- Textile Pollution Controlling Engineering Center of Ministry of Environmental Protection, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
- Institute of Biosciences, Freiberg University of Mining and Technology, 09599 Freiberg, Germany.
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45
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Supported Bimetallic AuPd Nanoparticles as a Catalyst for the Selective Hydrogenation of Nitroarenes. NANOMATERIALS 2018; 8:nano8090690. [PMID: 30189685 PMCID: PMC6165381 DOI: 10.3390/nano8090690] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 08/31/2018] [Accepted: 09/03/2018] [Indexed: 11/17/2022]
Abstract
The solvent-free selective hydrogenation of nitrobenzene was carried out using a supported AuPd nanoparticles catalyst, prepared by the modified impregnation method (MIm), as efficient catalyst >99% yield of aniline (AN) was obtained after 15 h at 90 °C, 3 bar H2 that can be used without any further purification or separation, therefore reducing cost and energy input. Supported AuPd nanoparticles catalyst, prepared by MIm, was found to be active and stable even after four recycle experiments, whereas the same catalyst prepared by SIm was deactivated during the recycle experiments. The most effective catalyst was tested for the chemoselective hydrogenation of 4-chloronitrobenzene (CNB) to 4-chloroaniline (CAN). The activation energy of CNB to CAN was found to be 25 kJ mol−1, while that of CNB to AN was found to be 31 kJ mol−1. Based on this, the yield of CAN was maximized (92%) by the lowering the reaction temperature to 25 °C.
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46
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Feng Y, Shao Q, Huang B, Zhang J, Huang X. Surface engineering at the interface of core/shell nanoparticles promotes hydrogen peroxide generation. Natl Sci Rev 2018. [DOI: 10.1093/nsr/nwy065] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Yonggang Feng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Qi Shao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Bolong Huang
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China
| | - Junbo Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xiaoqing Huang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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47
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Li F, Shao Q, Hu M, Chen Y, Huang X. Hollow Pd–Sn Nanocrystals for Efficient Direct H2O2 Synthesis: The Critical Role of Sn on Structure Evolution and Catalytic Performance. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00347] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fumin Li
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Qi Shao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu 215123, China
| | - Mancheng Hu
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Yu Chen
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Xiaoqing Huang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu 215123, China
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48
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Nowicka E, Althahban SM, Luo Y, Kriegel R, Shaw G, Morgan DJ, He Q, Watanabe M, Armbrüster M, Kiely CJ, Hutchings GJ. Highly selective PdZn/ZnO catalysts for the methanol steam reforming reaction. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01100a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalysts were prepared by impregnation-based method involving excess Cl− anion addition to the metal chloride precursors which resulted in improved mixing of metals and led to formation of highly ordered PdZn alloys responsible for high catalytic selectivity.
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Affiliation(s)
- Ewa Nowicka
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Sultan M. Althahban
- Department of Materials Science and Engineering
- Lehigh University
- Bethlehem
- USA
| | - Yuan Luo
- Max-Planck-Institut für Chemische Physik fester Stoffe
- 01187 Dresden
- Germany
| | - René Kriegel
- Faculty of Natural Sciences
- Institute of Chemistry
- Materials for Innovative Energy Concepts
- Chemnitz University of Technology
- 09107 Chemnitz
| | - Greg Shaw
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - David J. Morgan
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Qian He
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Masashi Watanabe
- Department of Materials Science and Engineering
- Lehigh University
- Bethlehem
- USA
| | - Marc Armbrüster
- Faculty of Natural Sciences
- Institute of Chemistry
- Materials for Innovative Energy Concepts
- Chemnitz University of Technology
- 09107 Chemnitz
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49
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Rucinska E, Miedziak PJ, Pattisson S, Brett GL, Iqbal S, Morgan DJ, Sankar M, Hutchings GJ. Cinnamyl alcohol oxidation using supported bimetallic Au–Pd nanoparticles: an investigation of autoxidation and catalysis. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00155c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we examine autoxidation and its role on the catalytic aerobic oxidation of cinnamyl alcohol using supported AuPd nanoparticles.
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Affiliation(s)
| | | | | | | | - Sarwat Iqbal
- Cardiff Catalysis Institute
- Cardiff University
- Cardiff
- UK
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50
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Yin Z, Zheng Y, Wang H, Li J, Zhu Q, Wang Y, Ma N, Hu G, He B, Knop-Gericke A, Schlögl R, Ma D. Engineering Interface with One-Dimensional Co 3O 4 Nanostructure in Catalytic Membrane Electrode: Toward an Advanced Electrocatalyst for Alcohol Oxidation. ACS NANO 2017; 11:12365-12377. [PMID: 29141144 DOI: 10.1021/acsnano.7b06287] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Electrochemical oxidation has attracted vast interest as a promising alternative to traditional chemical processes in fine chemical synthesis owing to its fast and sustainable features. An electrocatalytic membrane reactor (ECMR) with a three-dimensional (3D) electrode has been successfully designed for the selective oxidation of alcohols with high current efficiency to the corresponding acids or ketones. The anode electrode was fabricated by the in situ loading of one-dimensional (1D) Co3O4 nanowires (NWs) on the conductive porous Ti membrane (Co3O4 NWs/Ti) via the combination of a facile hydrothermal synthesis and subsequent thermal treatment. The electrocatalytic oxidation (ECO) results of alcohols exhibited superior catalytic performance with a higher current efficiency on the Co3O4 NWs/Ti membrane compared with those of Co3O4 nanoparticles on the Ti membrane (Co3O4 NPs/Ti). Even under low reaction temperatures such as 0 °C, it still displayed a very high ECO activity for alcohol oxidation in the ECMR. For example, >99% conversion and 92% selectivity toward benzoic acid were obtained for the benzyl alcohol electrooxidation. The electrode is particularly effective for the cyclohexanol oxidation, and a selectivity of >99% to cyclohexanone was achieved at 0 °C, higher than most reported noble-metal catalysts under the aerobic reaction conditions. The extraordinary electrocatalytic performance of the 3D Co3O4 NWs/Ti membrane electrode demonstrates the significant influence of morphology effect and engineering interfaces in membrane electrodes on the electrocatalytic activity and charge transfer process of nanocatalysts. Our results propose that similar membrane electrodes serve as versatile platforms for the applications of 1D nanomaterials, porous electrodes, and ECMRs.
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Affiliation(s)
- Zhen Yin
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Membrane Science and Technology, School of Environmental and Chemical Engineering, Tianjin Polytechnic University , 399 Binshui West Road, Tianjin 300387, People's Republic of China
| | - Yumei Zheng
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Membrane Science and Technology, School of Environmental and Chemical Engineering, Tianjin Polytechnic University , 399 Binshui West Road, Tianjin 300387, People's Republic of China
| | - Hong Wang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Membrane Science and Technology, School of Materials Science and Engineering, Tianjin Polytechnic University , 399 Binshui West Road, Tianjin 300387, People's Republic of China
| | - Jianxin Li
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Membrane Science and Technology, School of Materials Science and Engineering, Tianjin Polytechnic University , 399 Binshui West Road, Tianjin 300387, People's Republic of China
| | - Qingjun Zhu
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6, D-14195 Berlin, Germany
| | - Ye Wang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Membrane Science and Technology, School of Environmental and Chemical Engineering, Tianjin Polytechnic University , 399 Binshui West Road, Tianjin 300387, People's Republic of China
| | - Na Ma
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Membrane Science and Technology, School of Materials Science and Engineering, Tianjin Polytechnic University , 399 Binshui West Road, Tianjin 300387, People's Republic of China
| | - Gang Hu
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Benqiao He
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Membrane Science and Technology, School of Materials Science and Engineering, Tianjin Polytechnic University , 399 Binshui West Road, Tianjin 300387, People's Republic of China
| | - Axel Knop-Gericke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6, D-14195 Berlin, Germany
| | - Robert Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6, D-14195 Berlin, Germany
| | - Ding Ma
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
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