1
|
Bibi SB, El-Zohry AM, Davies B, Grigorev V, Goodwin CM, Lömker P, Holm A, Ali-Löytty H, Garcia-Martinez F, Schlueter C, Soldemo M, Koroidov S, Hansson T. Multi-spectroscopic study of electrochemically-formed oxide-derived gold electrodes. Phys Chem Chem Phys 2024; 26:2332-2340. [PMID: 38165839 DOI: 10.1039/d3cp04009g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Oxide-derived metals are produced by reducing an oxide precursor. These materials, including gold, have shown improved catalytic performance over many native metals. The origin of this improvement for gold is not yet understood. In this study, operando non-resonant sum frequency generation (SFG) and ex situ high-pressure X-ray photoelectron spectroscopy (HP-XPS) have been employed to investigate electrochemically-formed oxide-derived gold (OD-Au) from polycrystalline gold surfaces. A range of different oxidizing conditions were used to form OD-Au in acidic aqueous medium (H3PO4, pH = 1). Our electrochemical data after OD-Au is generated suggest that the surface is metallic gold, however SFG signal variations indicate the presence of subsurface gold oxide remnants between the metallic gold surface layer and bulk gold. The HP-XPS results suggest that this subsurface gold oxide could be in the form of Au2O3 or Au(OH)3. Furthermore, the SFG measurements show that with reducing electrochemical treatments the original gold metallic state can be restored, meaning the subsurface gold oxide is released. This work demonstrates that remnants of gold oxide persist beneath the topmost gold layer when the OD-Au is created, potentially facilitating the understanding of the improved catalytic properties of OD-Au.
Collapse
Affiliation(s)
- Sara Boscolo Bibi
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| | - Ahmed M El-Zohry
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| | - Bernadette Davies
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 114 18 Stockholm, Sweden
| | - Vladimir Grigorev
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| | - Christopher M Goodwin
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| | - Patrick Lömker
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| | - Alexander Holm
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| | - Harri Ali-Löytty
- Surface Science Group, Photonics Laboratory, Tampere University, P.O. Box 692, FI-33014 Tampere University, Finland
| | | | - Christoph Schlueter
- Photon Science, Deutsches ElektronenSynchrotron (DESY), 22607 Hamburg, Germany
| | - Markus Soldemo
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| | - Sergey Koroidov
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| | - Tony Hansson
- Department of Physics, AlbaNova University Center, Stockholm University, 10691 Stockholm, Sweden.
| |
Collapse
|
2
|
Chauhan P, Hiekel K, Diercks JS, Herranz J, Saveleva VA, Khavlyuk P, Eychmüller A, Schmidt TJ. Electrochemical Surface Area Quantification, CO 2 Reduction Performance, and Stability Studies of Unsupported Three-Dimensional Au Aerogels versus Carbon-Supported Au Nanoparticles. ACS MATERIALS AU 2022; 2:278-292. [PMID: 35578702 PMCID: PMC9101071 DOI: 10.1021/acsmaterialsau.1c00067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 01/14/2022] [Accepted: 01/14/2022] [Indexed: 12/21/2022]
Abstract
The efficient scale-up of CO2-reduction technologies is a pivotal step to facilitate intermittent energy storage and for closing the carbon cycle. However, there is a need to minimize the occurrence of undesirable side reactions like H2 evolution and achieve selective production of value-added CO2-reduction products (CO and HCOO-) at as-high-as-possible current densities. Employing novel electrocatalysts such as unsupported metal aerogels, which possess a highly porous three-dimensional nanostructure, offers a plausible approach to realize this. In this study, we first quantify the electrochemical surface area of an Au aerogel (≈5 nm in web thickness) using the surface oxide-reduction and copper underpotential deposition methods. Subsequently, the aerogel is tested for its CO2-reduction performance in an in-house developed, two-compartment electrochemical cell. For comparison purposes, similar measurements are also performed on polycrystalline Au and a commercial catalyst consisting of Au nanoparticles supported on carbon black (Au/C). The Au aerogel exhibits a faradaic efficiency of ≈97% for CO production at ≈-0.48 VRHE, with a suppression of H2 production compared to Au/C that we ascribe to its larger Au-particle size. Finally, identical-location transmission electron microscopy of both nanomaterials before and after CO2-reduction reveals that, unlike Au/C, the aerogel network retains its nanoarchitecture at the potential of peak CO production.
Collapse
Affiliation(s)
- Piyush Chauhan
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Karl Hiekel
- Physical Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
| | - Justus S Diercks
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Juan Herranz
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Viktoriia A Saveleva
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Pavel Khavlyuk
- Physical Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
| | | | - Thomas J Schmidt
- Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.,Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland
| |
Collapse
|
3
|
Kund J, Romer J, Oswald E, Gaus AL, Küllmer M, Turchanin A, von Delius M, Kranz C. Pd‐Modified De‐alloyed Au‐Ni‐Microelectrodes for In Situ / Operando Mapping of Hydrogen Evolution. ChemElectroChem 2022. [DOI: 10.1002/celc.202200071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Julian Kund
- Ulm University: Universitat Ulm Institute of Analytical and Bioanalytical Chemistry GERMANY
| | - Jan Romer
- Ulm University: Universitat Ulm Institute of Analytical and Bioanalytical Chemistry GERMANY
| | - Eva Oswald
- Ulm University: Universitat Ulm Institut of Analytical and Bioanalytical Chemistry GERMANY
| | - Anna-Laurine Gaus
- Ulm University: Universitat Ulm Institute of Organic Chemistry GERMANY
| | - Maria Küllmer
- Friedrich-Schiller-Universität Jena: Friedrich-Schiller-Universitat Jena Institute of Physical Chemistry GERMANY
| | - Andrey Turchanin
- Friedrich-Schiller-Universität Jena: Friedrich-Schiller-Universitat Jena Institute of Physical Chemistry GERMANY
| | - Max von Delius
- Ulm University: Universitat Ulm Institute of Organic Chemistry GERMANY
| | - Christine Kranz
- University of Ulm Institute of Analytical and Bioanalytical Chemistry Albert-Einstein-Allee 11 89081 Ulm GERMANY
| |
Collapse
|
4
|
Artmann E, Menezes PV, Forschner L, Elnagar MM, Kibler LA, Jacob T, Engstfeld AK. Structural Evolution of Pt, Au and Cu Anodes by Electrolysis up to Contact Glow Discharge Electrolysis in Alkaline Electrolytes*. Chemphyschem 2021; 22:2429-2441. [PMID: 34523210 PMCID: PMC9298152 DOI: 10.1002/cphc.202100433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 08/10/2021] [Indexed: 01/09/2023]
Abstract
Applying a voltage to metal electrodes in contact with aqueous electrolytes results in the electrolysis of water at voltages above the decomposition voltage and plasma formation in the electrolyte at much higher voltages referred to as contact glow discharge electrolysis (CGDE). While several studies explore parameters that lead to changes in the I-U characteristics in this voltage range, little is known about the evolution of the structural properties of the electrodes. Here we study this aspect on materials essential to electrocatalysis, namely Pt, Au, and Cu. The stationary I-U characteristics are almost identical for all electrodes. Detailed structural characterization by optical microscopy, scanning electron microscopy, and electrochemical approaches reveal that Pt is stable during electrolysis and CGDE, while Au and Cu exhibit a voltage-dependent oxide formation. More importantly, oxides are reduced when the Au and Cu electrodes are kept in the electrolysis solution after electrolysis. We suspect that H2 O2 (formed during electrolysis) is responsible for the oxide reduction. The reduced oxides (which are also accessible via electrochemical reduction) form a porous film, representing a possible new class of materials in energy storage and conversion studies.
Collapse
Affiliation(s)
- Evelyn Artmann
- Institute of ElectrochemistryUlm University, D-89081UlmGermany
| | | | - Lukas Forschner
- Institute of ElectrochemistryUlm University, D-89081UlmGermany
| | | | | | - Timo Jacob
- Institute of ElectrochemistryUlm University, D-89081UlmGermany
| | | |
Collapse
|
5
|
Mayet N, Servat K, Kokoh KB, Napporn TW. Electrochemical Oxidation of Carbon Monoxide on Unsupported Gold Nanospheres in Alkaline Medium. Electrocatalysis (N Y) 2020. [DOI: 10.1007/s12678-020-00626-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
6
|
Silva Olaya AR, Zandersons B, Wittstock G. Restructuring of Nanoporous Gold Surfaces During Electrochemical Cycling in Acidic and Alkaline Media. ChemElectroChem 2020. [DOI: 10.1002/celc.202000923] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Birthe Zandersons
- Institute of Materials Physics and Technology Hamburg University of Technology 21073 Hamburg Germany
| | - Gunther Wittstock
- Department of Chemistry Carl von Ossietzky University of Oldenburg 26111 Oldenburg Germany
| |
Collapse
|
7
|
Sun L, Chen Y, Chen F, Ma F. Peptide-based electrochemical biosensor for matrix metalloproteinase-14 and protein-overexpressing cancer cells based on analyte-induced cleavage of peptide. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105103] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
8
|
Platinum monolayers stabilized on dealloyed AuCu core-shell nanoparticles for improved activity and stability on methanol oxidation reaction. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.06.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
9
|
Yi L, Meng Y, Yang S, Fei J, Ding Y, Wang X, Lu Y. N-Doped carbon-supported Au-modified NiFe alloy nanoparticle composite catalysts for BH4− electrooxidation. NEW J CHEM 2020. [DOI: 10.1039/d0nj00557f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nitrogen-doped carbon-supported Au-modified NiFe alloy nanoparticle composite catalyst (Au/NiFe/N–C) has been prepared by a simple method and used as an electrocatalyst for the BH4− oxidation reaction (BOR).
Collapse
Affiliation(s)
- Lanhua Yi
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Yuan Meng
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Shaobo Yang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Junjie Fei
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Yonglan Ding
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Xianyou Wang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Yebo Lu
- College of Mechanical and Electrical Engineering
- Jiaxing University
- Jiaxing 314001
- P. R. China
| |
Collapse
|
10
|
Yi L, Yang S, Fei J, Ding Y, Wang X, Lu Y. Carbon-supported Au modified N-doped carbon-coated FeMn alloy nanoparticle composites for BH 4− electrocatalytic oxidation. NEW J CHEM 2020. [DOI: 10.1039/d0nj01974g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon-supported Au modified N-doped carbon-coated FeMn alloy nanoparticle composites (Au/FeMn@CN/C) are prepared and used as electrocatalysts for BH4− electrooxidation.
Collapse
Affiliation(s)
- Lanhua Yi
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Shaobo Yang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Junjie Fei
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Yonglan Ding
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Xianyou Wang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education
- School of Chemistry
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Yebo Lu
- College of Mechanical and Electrical Engineering
- Jiaxing University
- Jiaxing 314001
- P. R. China
| |
Collapse
|
11
|
Reactivity mapping of nanoscale defect chemistry under electrochemical reaction conditions. Nat Commun 2019; 10:5702. [PMID: 31836705 PMCID: PMC6910959 DOI: 10.1038/s41467-019-13692-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/19/2019] [Indexed: 01/24/2023] Open
Abstract
Electrocatalysts often show increased conversion at nanoscale chemical or topographic surface inhomogeneities, resulting in spatially heterogeneous reactivity. Identifying reacting species locally with nanometer precision during chemical conversion is one of the biggest quests in electrochemical surface science to advance (electro)catalysis and related fields. Here, we demonstrate that electrochemical tip-enhanced Raman spectroscopy can be used for combined topography and reactivity imaging of electro-active surface sites under reaction conditions. We map the electrochemical oxidation of Au nanodefects, a showcase energy conversion and corrosion reaction, with a chemical spatial sensitivity of about 10 nm. The results indicate the reversible, concurrent formation of spatially separated Au2O3 and Au2O species at defect-terrace and protrusion sites on the defect, respectively. Active-site chemical nano-imaging under realistic working conditions is expected to be pivotal in a broad range of disciplines where quasi-atomistic reactivity understanding could enable strategic engineering of active sites to rationally tune (electro)chemical device properties. Identifying reacting species locally with nanometer precision is a major challenge in electrochemical surface science. Using operando Raman nanoscopy, authors image the reversible, concurrent formation of nanometer-spatially separated Au2O3 and Au2O species during Au nanodefect oxidation.
Collapse
|
12
|
Yi L, Yang S, Fei J, Ding Y, Yang C, Wang X. Carbon-supported Co(OH) 2 coated with Au nanoparticle composites as an efficient catalyst for BH 4− electrooxidation. NEW J CHEM 2019. [DOI: 10.1039/c9nj01052a] [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
A Co(OH)2(50)@Au(50)/C nanoparticle composite electrocatalyst combines the lower content of noble metals and much higher catalytic activity for BH4− electrooxidation.
Collapse
Affiliation(s)
- Lanhua Yi
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University
- Xiangtan 411105
- China
| | - Shaobo Yang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University
- Xiangtan 411105
- China
| | - Junjie Fei
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University
- Xiangtan 411105
- China
| | - Yonglan Ding
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University
- Xiangtan 411105
- China
| | - Chunguang Yang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University
- Xiangtan 411105
- China
| | - Xianyou Wang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry, Xiangtan University
- Xiangtan 411105
- China
| |
Collapse
|
13
|
Effect of Particle Size on the Corrosion Behaviour of Gold in the Presence of Chloride Impurities: An EFC-ICP-MS Potentiodynamic Study. COATINGS 2018. [DOI: 10.3390/coatings9010010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A profound understanding of the Au dissolution process is a prerequisite for optimal utilization of Au-based materials. This goes for either increasing the corrosion stability of materials in the sectors where the long-term functionality of Au is needed or decreasing the corrosion stability where the recovery of the Au component is crucial. By employing an extremely sensitive online analytical system, consisting of an electrochemical flow cell coupled to an inductively coupled plasma mass spectrometry, in situ potential-resolved dissolution of Au in the ppb range is enabled. A comparative study of two Au based materials, (i) a polycrystalline Au disk and (ii) carbon-supported Au nanoparticles, is presented. As a probe, chloride ions were used to elucidate the distinct differences in the corrosion behavior of the two analogues.
Collapse
|
14
|
Kang ES, Kimu YT, Ko YS, Kim NH, Cho G, Huh YH, Kim JH, Nam J, Thach TT, Youn D, Kim YD, Yun WS, DeGrado WF, Kim SY, Hammond PT, Lee J, Kwon YU, Ha DH, Kim YH. Peptide-Programmable Nanoparticle Superstructures with Tailored Electrocatalytic Activity. ACS NANO 2018; 12:6554-6562. [PMID: 29842775 PMCID: PMC6556112 DOI: 10.1021/acsnano.8b01146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Biomaterials derived via programmable supramolecular protein assembly provide a viable means of constructing precisely defined structures. Here, we present programmed superstructures of AuPt nanoparticles (NPs) on carbon nanotubes (CNTs) that exhibit distinct electrocatalytic activities with respect to the nanoparticle positions via rationally modulated peptide-mediated assembly. De novo designed peptides assemble into six-helix bundles along the CNT axis to form a suprahelical structure. Surface cysteine residues of the peptides create AuPt-specific nucleation site, which allow for precise positioning of NPs onto helical geometries, as confirmed by 3-D reconstruction using electron tomography. The electrocatalytic model system, i.e., AuPt for oxygen reduction, yields electrochemical response signals that reflect the controlled arrangement of NPs in the intended assemblies. Our design approach can be expanded to versatile fields to build sophisticated functional assemblies.
Collapse
Affiliation(s)
- Eun Sung Kang
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Yong-Tae Kimu
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Young-Seon Ko
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Nam Hyeong Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Geonhee Cho
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Yang Hoon Huh
- Electron Microscopy Research Center, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
| | - Ji-Hun Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jiyoung Nam
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Trung Thanh Thach
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - David Youn
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Young Dok Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Wan Soo Yun
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - William F. DeGrado
- Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California 94158, United States
| | - Sung Yeol Kim
- School of Mechanical Engineering, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Paula T. Hammond
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Jaeyoung Lee
- School of Environmental Science and Engineering, Ertl Center for Electrochemistry and Catalysis, Research Institute for Solar and Sustainable Energies (RISE), Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Young-Uk Kwon
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Don-Hyung Ha
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Yong Ho Kim
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon 16419, Republic of Korea
| |
Collapse
|
15
|
Xiang H, Wang Y, Wang M, Shao Y, Jiao Y, Zhu Y. A redox cycling-amplified electrochemical immunosensor for α-fetoprotein sensitive detection via polydopamine nanolabels. NANOSCALE 2018; 10:13572-13580. [PMID: 29974910 DOI: 10.1039/c8nr02946f] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A sandwich-type electrochemical immunosensor for sensitive detection of a tumor marker, α-fetoprotein (AFP), was fabricated by employing polydopamine-detection antibody nanoparticles (PDANPs-Ab2) as selective redox cycling-based signal amplifiers on an electrodeposited nano-gold electrode. In this research, PDANPs prepared through oxidative polymerization of dopamine were found to amplify the oxidation charge transfer of the electrochemical mediator (1,1'-ferrocene dimethanol, FDM), which was supported by cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) investigation. Therefore, PDANPs were utilized as label materials of electrochemical immunosensors to enhance sensitivity for the first time. Meanwhile, the nano-gold electrode was used as a platform to accelerate electron transfer and immobilize capture antibody (Ab1). The electrochemical performance of the AFP immunosensor was investigated in PBS containing FDM with CV. Under optimal conditions, the constructed AFP immunosensor exhibited a wide linear range from 1 pg mL-1 to 50 ng mL-1 and a low detection limit of 0.3 pg mL-1, as well as excellent stability, reproducibility and selectivity. Measurements of AFP in human serum gave excellent correlation with the clinical standard Chemiluminescence Microparticle Immuno Assay (CMIA). These results indicated that the developed immunosensor may have promising application in the clinical diagnosis of AFP and other tumor markers.
Collapse
Affiliation(s)
- Haipeng Xiang
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
| | | | | | | | | | | |
Collapse
|
16
|
|
17
|
Wen X, Chang L, Gao Y, Han J, Bai Z, Huan Y, Li M, Tang Z, Yan X. A reassembled nanoporous gold leaf electrocatalyst for efficient CO2reduction towards CO. Inorg Chem Front 2018. [DOI: 10.1039/c8qi00023a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The free-standing nanoporous gold leaf has an excellent FE of 90% towards CO and a high mass activity of 20.51 A/g.
Collapse
Affiliation(s)
- Xiaosong Wen
- Laboratory of Nanomaterials
- National Center for Nanoscience and Technology
- Beijing
- 100190 P. R China
- School of Materials Science and Engineering
| | - Lin Chang
- Laboratory of Nanomaterials
- National Center for Nanoscience and Technology
- Beijing
- 100190 P. R China
| | - Yan Gao
- Laboratory of Nanomaterials
- National Center for Nanoscience and Technology
- Beijing
- 100190 P. R China
| | - Jianyu Han
- Laboratory of Nanomaterials
- National Center for Nanoscience and Technology
- Beijing
- 100190 P. R China
| | - Zhiming Bai
- School of Civil and Resource Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Yahuan Huan
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Minghua Li
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Zhiyong Tang
- Laboratory of Nanomaterials
- National Center for Nanoscience and Technology
- Beijing
- 100190 P. R China
| | - Xiaoqin Yan
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| |
Collapse
|
18
|
Steentjes T, Jonkheijm P, Huskens J. Electron Transfer Processes in Ferrocene-Modified Poly(ethylene glycol) Monolayers on Electrodes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:11878-11883. [PMID: 28977744 PMCID: PMC5677253 DOI: 10.1021/acs.langmuir.7b02160] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Electrochemistry is a powerful tool to study self-assembled monolayers. Here, we modified cystamine-functionalized electrodes with different lengths of linear poly(ethylene glycol) (PEG) polymers end-functionalized with a redox-active ferrocene (Fc) group. The electron transport properties of the Fc probes were studied using cyclic voltammetry. The Fc moiety attached to the shortest PEG (Mn = 250 Da) behaved as a surface-confined species, and the homogeneous electron transfer rate constants were determined. The electron transfer of the ferrocene group on the longer PEGs (Mn = 3.4, 5, and 10 kDa) was shown to be driven by diffusion. For low surface densities, where the polymer exists in the mushroom conformation, the diffusion coefficients (D) and rate constants were increasing with polymer length. In the loose brush conformation, where the polymers are close enough to interact with each other, the thickness of the layers (e) was unknown and a parameter D1/2/e was determined. This parameter showed no dependence on surface density and an increase with polymer length.
Collapse
|
19
|
An electrochemical DNA sensor without electrode pre-modification. Biosens Bioelectron 2017; 91:110-114. [DOI: 10.1016/j.bios.2016.10.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 09/30/2016] [Accepted: 10/03/2016] [Indexed: 01/19/2023]
|
20
|
Haensch M, Behnken J, Balboa L, Dyck A, Wittstock G. Redox titration of gold and platinum surface oxides at porous microelectrodes. Phys Chem Chem Phys 2017; 19:22915-22925. [DOI: 10.1039/c7cp04589a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Cavity-microelectrodes were used to investigate surface oxides on supported platinum nanoparticles and nanoporous gold with the surface interrogation mode of scanning electrochemical microscopy.
Collapse
Affiliation(s)
- Mareike Haensch
- Carl von Ossietzky University of Oldenburg
- Institute of Chemistry
- Carl-von-Ossietzky-Str. 9-11
- 26129 Oldenburg
- Germany
| | - Julian Behnken
- Carl von Ossietzky University of Oldenburg
- Institute of Chemistry
- Carl-von-Ossietzky-Str. 9-11
- 26129 Oldenburg
- Germany
| | - Luis Balboa
- Carl von Ossietzky University of Oldenburg
- Institute of Chemistry
- Carl-von-Ossietzky-Str. 9-11
- 26129 Oldenburg
- Germany
| | - Alexander Dyck
- DLR Institute of Networked Energy Systems
- Carl-von-Ossietzky-Str. 15
- 26129 Oldenburg
- Germany
| | - Gunther Wittstock
- Carl von Ossietzky University of Oldenburg
- Institute of Chemistry
- Carl-von-Ossietzky-Str. 9-11
- 26129 Oldenburg
- Germany
| |
Collapse
|
21
|
Bentley CL, Kang M, Unwin PR. Time-Resolved Detection of Surface Oxide Formation at Individual Gold Nanoparticles: Role in Electrocatalysis and New Approach for Sizing by Electrochemical Impacts. J Am Chem Soc 2016; 138:12755-12758. [DOI: 10.1021/jacs.6b08124] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Cameron L. Bentley
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Minkyung Kang
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Patrick R. Unwin
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| |
Collapse
|
22
|
Wang Y, Sun Y, Liao H, Sun S, Li S, Ager JW, Xu ZJ. Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.095] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
23
|
Gutiérrez-Zúñiga GG, Hernández-López JL. Sensitivity improvement of a sandwich-type ELISA immunosensor for the detection of different prostate-specific antigen isoforms in human serum using electrochemical impedance spectroscopy and an ordered and hierarchically organized interfacial supramolecular architecture. Anal Chim Acta 2015; 902:97-106. [PMID: 26703258 DOI: 10.1016/j.aca.2015.10.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 10/26/2015] [Accepted: 10/27/2015] [Indexed: 11/19/2022]
Abstract
A gold millielectrode (GME) functionalized with a mixed (16-MHA + EG3SH) self-assembled monolayer (SAM) was used to fabricate an indirect enzyme-linked immunosorbent assay (ELISA) immunosensor for the sensitive detection of prostate-specific antigen (PSA), a prostate cancer (PCa) biomarker, in human serum samples. To address and minimize the issue of non-specific protein adsorption, an organic matrix (amine-PEG3-biotin/avidin) was assembled on the previously functionalized electrode surface to build up an ordered and hierarchically organized interfacial supramolecular architecture: Au/16-MHA/EG3SH/amine-PEG3-biotin/avidin. The electrode was then exposed to serum samples at different concentrations of a sandwich-type immunocomplex molecule ((Btn)Ab-AgPSA-(HRP)Ab), and its interfacial properties were characterized using electrochemical impedance spectroscopy (EIS). Calibration curves for polarization resistance (RP) and capacitance (1/C) vs. total and free PSA concentrations were obtained and their analytical quality parameters were determined. This approach was compared with results obtained from a commercially available ELISA immunosensor. The results obtained in this work showed that the proposed immunosensor can be successfully applied to analyze serum samples of patients representative of the Mexican population.
Collapse
Affiliation(s)
- Gabriela Guadalupe Gutiérrez-Zúñiga
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C., Parque Tecnológico Querétaro S/N, P.O. Box 064, Pedro Escobedo, Qro., Mexico
| | - José Luis Hernández-López
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C., Parque Tecnológico Querétaro S/N, P.O. Box 064, Pedro Escobedo, Qro., Mexico.
| |
Collapse
|
24
|
García-Mendoza A, Aguilar JC. Analysis of water in room temperature ionic liquids by linear sweep, differential pulse and square wave cathodic stripping voltammetries. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
25
|
|
26
|
Yongprapat S, Therdthianwong A, Therdthianwong S. Effects of NH3 and tertiary ammoniums on Au/C catalyst in glycerol electrooxidation in alkaline media. J APPL ELECTROCHEM 2015. [DOI: 10.1007/s10800-015-0821-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
27
|
Ma F, Rehman A, Liu H, Zhang J, Zhu S, Zeng X. Glycosylation of Quinone-Fused Polythiophene for Reagentless and Label-Free Detection of E. coli. Anal Chem 2015; 87:1560-8. [DOI: 10.1021/ac502712q] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Fen Ma
- Department
of Chemistry, Oakland University, Rochester, Michigan 48309, United States
| | - Abdul Rehman
- Department
of Chemistry, Oakland University, Rochester, Michigan 48309, United States
| | - Haiying Liu
- Department
of Chemistry, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Jingtuo Zhang
- Department
of Chemistry, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Shilei Zhu
- Department
of Chemistry, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Xiangqun Zeng
- Department
of Chemistry, Oakland University, Rochester, Michigan 48309, United States
| |
Collapse
|
28
|
Influence of gold nanoparticle loading in Au/C on the activity towards electrocatalytic glycerol oxidation. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.11.186] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
29
|
Droessler JE, Czerwinski KR, Hatchett DW. Electrochemical Measurement of Gold Oxide Reduction and Methods for Acid Neutralization and Minimization of Water in Wet Ionic Liquid. ELECTROANAL 2014. [DOI: 10.1002/elan.201400450] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
30
|
Zhu J, Wu XY, Shan D, Yuan PX, Zhang XJ. Sensitive electrochemical detection of NADH and ethanol at low potential based on pyrocatechol violet electrodeposited on single walled carbon nanotubes-modified pencil graphite electrode. Talanta 2014; 130:96-102. [PMID: 25159384 DOI: 10.1016/j.talanta.2014.06.057] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 06/21/2014] [Accepted: 06/25/2014] [Indexed: 11/25/2022]
Abstract
In this work, the electrodeposition of pyrocatechol violet (PCV) was initially investigated by the electrochemical surface plasmon resonance (ESPR) technique. Subsequently, PCV was used as redox-mediator and was electrodeposited on the surface of pencil graphite electrode (PGE) modified with single-wall carbon nanotubes (SWCNTs). Owing to the remarkable synergistic effect of SWCNTs and PCV, PGE/SWCNTs/PCV exhibited excellent electrocatalytic activity towards dihydronicotinamide adenine dinucleotide (NADH) oxidation at low potential (0.2V vs. SCE) with fast amperometric response (<10s), broad linear range (1.3-280 μM), good sensitivity (146.2 μA mM(-1)cm(-2)) and low detection limit (1.3 μM) at signal-to-noise ratio of 3. Thus, this PGE/SWCNTs/PCV could be further used to fabricate a sensitive and economic ethanol biosensor using alcohol dehydrogenase (ADH) via a glutaraldehyde/BSA cross-linking procedure.
Collapse
Affiliation(s)
- Jun Zhu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xiao-Yan Wu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Dan Shan
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Pei-Xin Yuan
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xue-Ji Zhang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| |
Collapse
|
31
|
Shrestha BR, Baimpos T, Raman S, Valtiner M. Angstrom-resolved real-time dissection of electrochemically active noble metal interfaces. ACS NANO 2014; 8:5979-5987. [PMID: 24826945 DOI: 10.1021/nn501127n] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Electrochemical solid|liquid interfaces are critically important for technological applications and materials for energy storage, harvesting, and conversion. Yet, a real-time Angstrom-resolved visualization of dynamic processes at electrified solid|liquid interfaces has not been feasible. Here we report a unique real-time atomistic view into dynamic processes at electrochemically active metal interfaces using white light interferometry in an electrochemical surface forces apparatus. This method allows simultaneous deciphering of both sides of an electrochemical interface-the solution and the metal side-with microsecond resolution under dynamically evolving reactive conditions that are inherent to technological systems in operando. Quantitative in situ analysis of the potentiodynamic electrochemical oxidation/reduction of noble metal surfaces shows that Angstrom thick oxides formed on Au and Pt are high-ik materials; that is, they are metallic or highly defect-rich semiconductors, while Pd forms a low-ik oxide. In contrast, under potentiostatic growth conditions, all noble metal oxides exhibit a low-ik behavior. On the solution side, we reveal hitherto unknown strong electrochemical reaction forces, which are due to temporary charge imbalance in the electric double layer caused by depletion/generation of charged species. The real-time capability of our approach reveals significant time lags between electron transfer, oxide reduction/oxidation, and solution side reaction during a progressing electrode process. Comparing the kinetics of solution and metal side responses provides evidence that noble metal oxide reduction proceeds via a hydrogen adsorption and subsequent dissolution/redeposition mechanism. The presented approach may have important implications for designing emerging materials utilizing electrified interfaces and may apply to bioelectrochemical processes and signal transmission.
Collapse
Affiliation(s)
- Buddha R Shrestha
- Department for Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH , Max-Planck-Straße 1, D-40237 Düsseldorf, Germany
| | | | | | | |
Collapse
|
32
|
Boopathi S, Senthil Kumar S, Narasimha Phani KL. Generation of Active Sites on Gold Nanostructured Surface through Ultrasound-Assisted Direct Electrodeposition and Its Effect on Enzyme-less Glucose Electro-oxidation. ChemElectroChem 2014. [DOI: 10.1002/celc.201402021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
33
|
Xiao C, Weremfo A, Wan C, Zhao C. Cathodic Stripping Determination of Water in Organic Solvents. ELECTROANAL 2014. [DOI: 10.1002/elan.201300471] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
34
|
Iotov P, Kalcheva S, Kanazirski I. On the enhanced electrocatalytic performance of PtAu alloys in borohydride oxidation. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.06.132] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
35
|
Cook KM, Nissley DA, Ferguson GS. Spatially selective formation of hydrocarbon, fluorocarbon, and hydroxyl-terminated monolayers on a microelectrode array. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:6779-6783. [PMID: 23679352 DOI: 10.1021/la401250d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A protection-deprotection strategy, using gold oxide as a passivating layer, was used to direct the self-assembly of monolayers (SAMs) selectively at individual gold microelectrodes in an array. This approach allowed the formation of hydroxyl-terminated monolayers, without side reactions, in addition to hydrocarbon and fluorocarbon SAMs. Fluorescence microscopy was used to visualize selective dewetting of hydrophobic monolayers by an aqueous dye solution, and spatially resolved X-ray photoelectron spectroscopy was used to demonstrate a lack of cross-contamination on neighboring microelectrodes in the array.
Collapse
Affiliation(s)
- Kevin M Cook
- Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015-3172, United States
| | | | | |
Collapse
|
36
|
Yongprapat S, Therdthianwong A, Therdthianwong S. Au/C catalysts promoted with metal oxides for ethylene glycol electro-oxidation in alkaline solution. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2013.03.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
37
|
Zhu L, Xu L, Tan L, Tan H, Yang S, Yao S. Direct electrochemistry of cholesterol oxidase immobilized on gold nanoparticles-decorated multiwalled carbon nanotubes and cholesterol sensing. Talanta 2013; 106:192-9. [DOI: 10.1016/j.talanta.2012.12.036] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 12/20/2012] [Accepted: 12/21/2012] [Indexed: 11/27/2022]
|
38
|
Pirvu C, Manole CC. Electrochemical surface plasmon resonance for in situ investigation of antifouling effect of ultra thin hybrid polypyrrole/PSS films. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.11.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
39
|
Cherevko S, Topalov AA, Zeradjanin AR, Katsounaros I, Mayrhofer KJJ. Gold dissolution: towards understanding of noble metal corrosion. RSC Adv 2013. [DOI: 10.1039/c3ra42684j] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
|
40
|
Yongprapat S, Therdthianwong S, Therdthianwong A. RuO2 promoted Au/C catalysts for alkaline direct alcohol fuel cells. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.08.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
41
|
Li H, Wang C, Wu Z, Lu L, Qiu L, Zhou H, Shen G, Yu R. An electronic channel switching-based aptasensor for ultrasensitive protein detection. Anal Chim Acta 2012; 758:130-7. [PMID: 23245905 DOI: 10.1016/j.aca.2012.10.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Revised: 10/05/2012] [Accepted: 10/11/2012] [Indexed: 01/19/2023]
Abstract
Due to the ubiquity and essential of the proteins in all living organisms, the identification and quantification of disease-specific proteins are particularly important. Because the conformational change of aptamer upon its target or probe/target/probe sandwich often is the primary prerequisite for the design of an electrochemical aptameric assay system, it is extremely difficult to construct the electrochemical aptasensor for protein assay because the corresponding aptamers cannot often meet the requirement. To circumvent the obstacles mentioned, an electronic channel switching-based (ECS) aptasensor for ultrasensitive protein detection is developed. The essential achievement made is that an innovative sensing concept is proposed: the hairpin structure of aptamer is designed to pull electroactive species toward electrode surface and makes the surface-immobilized IgE serve as a barrier that separates enzyme from its substrate. It seemingly ensures that the ECS aptasensor exhibits most excellent assay features, such as, a detection limit of 4.44×10(-6)μg mL(-1) (22.7fM, 220zmol in 10-μL sample) (demonstrating a 5 orders of magnitude improvement in detection sensitivity compared with classical electronic aptasensors) and dynamic response range from 4.44×10(-6) to 4.44×10(-1)μg mL(-1). We believe that the described sensing concept here might open a new avenue for the detection of proteins and other biomacromolecules.
Collapse
Affiliation(s)
- Hongbo Li
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Au/C catalyst prepared by polyvinyl alcohol protection method for direct alcohol alkaline exchange membrane fuel cell application. J APPL ELECTROCHEM 2012. [DOI: 10.1007/s10800-012-0423-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
43
|
Zhao C, Bond AM, Lu X. Determination of Water in Room Temperature Ionic Liquids by Cathodic Stripping Voltammetry at a Gold Electrode. Anal Chem 2012; 84:2784-91. [DOI: 10.1021/ac2031173] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chuan Zhao
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052,
Australia
| | - Alan M. Bond
- School of Chemistry
and ARC
Centre for Green Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Xunyu Lu
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052,
Australia
| |
Collapse
|
44
|
Sulyma CM, Pettit CM, Garland JE, Roy D. Surface plasmon resonance as a probe of interactions between a thin-film gold electrode and an aqueous supporting electrolyte containing 1-ethyl-3-methyl-imidazolium ethyl sulfate ionic liquid. SURF INTERFACE ANAL 2011. [DOI: 10.1002/sia.4808] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- C. M. Sulyma
- Department of Physics; Clarkson University; Potsdam; NY 13699-5820; USA
| | - C. M. Pettit
- Department of Physics; Emporia State University; Emporia; KS 66801-5087; USA
| | - J. E. Garland
- Department of Physics; Clarkson University; Potsdam; NY 13699-5820; USA
| | - D. Roy
- Department of Physics; Clarkson University; Potsdam; NY 13699-5820; USA
| |
Collapse
|
45
|
Cathodic re-activation of the gold electrode in pulsed electrochemical detection of carbohydrates. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.09.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
46
|
Dawson K, Strutwolf J, Rodgers KP, Herzog G, Arrigan DWM, Quinn AJ, O'Riordan A. Single nanoskived nanowires for electrochemical applications. Anal Chem 2011; 83:5535-40. [PMID: 21619075 DOI: 10.1021/ac2004086] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, we fabricate gold nanowires with well controlled critical dimensions using a recently demonstrated facile approach termed nanoskiving. Nanowires are fabricated with lengths of several hundreds of micrometers and are easily electrically contacted using overlay electrodes. Following fabrication, nanowire device performance is assessed using both electrical and electrochemical characterization techniques. We observe low electrical resistances with typical linear Ohmic responses from fully packaged nanowire devices. Steady-state cyclic voltammograms in ferrocenemonocarboxylic acid demonstrate scan rate independence up to 1000 mV s(-1). Electrochemical responses are excellently described by classical Butler-Volmer kinetics, displaying a fast, heterogeneous electron transfer kinetics, k(0) = 2.27 ± 0.02 cm s(-1), α = 0.4 ± 0.01. Direct reduction of hydrogen peroxide is observed at nanowires across the 110 pM to 1 mM concentration range, without the need for chemical modification, demonstrating the potential of these devices for electrochemical applications.
Collapse
Affiliation(s)
- Karen Dawson
- Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland
| | | | | | | | | | | | | |
Collapse
|
47
|
Kim J, Lee SW, Chen S, Shao-Horn Y. Synthesis and Oxygen Reduction Reaction Activity of Atomic and Nanoparticle Gold on Thiol-Functionalized Multiwall Carbon Nanotubes. ACTA ACUST UNITED AC 2011. [DOI: 10.1149/1.3612270] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
48
|
Zuliani C, Walsh DA, Keyes TE, Forster RJ. Formation and Growth of Oxide Layers at Platinum and Gold Nano- and Microelectrodes. Anal Chem 2010; 82:7135-40. [DOI: 10.1021/ac101728a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Claudio Zuliani
- Biomedical Diagnostics Institute, Dublin City University, Dublin 9, Ireland, and School of Chemistry, University of Nottingham, Nottingham, U.K
| | - Darren A. Walsh
- Biomedical Diagnostics Institute, Dublin City University, Dublin 9, Ireland, and School of Chemistry, University of Nottingham, Nottingham, U.K
| | - Tia E. Keyes
- Biomedical Diagnostics Institute, Dublin City University, Dublin 9, Ireland, and School of Chemistry, University of Nottingham, Nottingham, U.K
| | - Robert J. Forster
- Biomedical Diagnostics Institute, Dublin City University, Dublin 9, Ireland, and School of Chemistry, University of Nottingham, Nottingham, U.K
| |
Collapse
|
49
|
Lu YC, Xu Z, Gasteiger HA, Chen S, Hamad-Schifferli K, Shao-Horn Y. Platinum−Gold Nanoparticles: A Highly Active Bifunctional Electrocatalyst for Rechargeable Lithium−Air Batteries. J Am Chem Soc 2010; 132:12170-1. [DOI: 10.1021/ja1036572] [Citation(s) in RCA: 1092] [Impact Index Per Article: 72.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yi-Chun Lu
- Departments of Materials Science and Engineering, Mechanical Engineering, and Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Zhichuan Xu
- Departments of Materials Science and Engineering, Mechanical Engineering, and Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Hubert A. Gasteiger
- Departments of Materials Science and Engineering, Mechanical Engineering, and Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Shuo Chen
- Departments of Materials Science and Engineering, Mechanical Engineering, and Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Kimberly Hamad-Schifferli
- Departments of Materials Science and Engineering, Mechanical Engineering, and Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Yang Shao-Horn
- Departments of Materials Science and Engineering, Mechanical Engineering, and Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| |
Collapse
|
50
|
Fu C, Zhou H, Xie D, Sun L, Yin Y, Chen J, Kuang Y. Electrodeposition of gold nanoparticles from ionic liquid microemulsion. Colloid Polym Sci 2010. [DOI: 10.1007/s00396-010-2238-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|