1
|
Ma H, Cheng P, Chen C, Geng X, Yang K, Lv F, Ma J, Jiang Y, Liu Q, Su Y, Li J, Zhu N. Highly Selective Wearable Alcohol Homologue Sensors Derived from Pt-Coated Truncated Octahedron Au. ACS Sens 2022; 7:3067-3076. [PMID: 36173279 DOI: 10.1021/acssensors.2c01392] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Unhealthy alcohol inhalation is among the top 10 causes of preventable death. However, the present alcohol sensors show poor selectivity among alcohol homologues. Herein, Pt-coated truncated octahedron Au (Ptm@Auto) as the electrocatalyst for a highly selective electrochemical sensor toward alcohol homologues has been designed. The alcohol sensor is realized by distinguishing the electro-oxidation behavior of methanol (MeOH), ethanol (EtOH), or isopropanol (2-propanol). Intermediates from alcohols are further oxidized to CO2 by Ptm@Auto, resulting in different oxidation peaks in cyclic voltammograms and successful distinction of alcohols. Ptm@Auto is then modified on wearable glove-based sensors for monitoring actual alcohol samples (MeOH fuel, vodka, and 2-propanol hand sanitizer), with good mechanical performance and repeatability. The exploration of the Ptm@Auto-based wearable alcohol sensor is expected to be suitable for environmental measurement with high selectivity for alcohol homologues or volatile organic compounds.
Collapse
Affiliation(s)
- Hongting Ma
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Peihao Cheng
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Chuanrui Chen
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Xiaodong Geng
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Kaizhou Yang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Fengjuan Lv
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Junlin Ma
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Yue Jiang
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Quanli Liu
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Yan Su
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Jian Li
- Center for Reproductive Medicine, Dalian Women and Children's Medical Center (Group), Dalian 116037, China
| | - Nan Zhu
- Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning 116024, China
| |
Collapse
|
2
|
Zhang M, Guo X. Gold/platinum bimetallic nanomaterials for immunoassay and immunosensing. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214578] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
3
|
Engineering gold-platinum core-shell nanoparticles by self-limitation in solution. Commun Chem 2022; 5:71. [PMID: 36697905 PMCID: PMC9814372 DOI: 10.1038/s42004-022-00680-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 05/04/2022] [Indexed: 01/28/2023] Open
Abstract
Core-shell particles with thin noble metal shells represent an attractive material class with potential for various applications ranging from catalysis to biomedical and pharmaceutical applications to optical crystals. The synthesis of well-defined core-shell architectures remains, however, highly challenging. Here, we demonstrate that atomically-thin and homogeneous platinum shells can be grown via a colloidal synthesis method on a variety of gold nanostructures ranging from spherical nanoparticles to nanorods and nanocubes. The synthesis is based on the exchange of low binding citrate ligands on gold, the reduction of platinum and the subsequent kinetically hindered growth by carbon monoxide as strong binding ligand. The prerequisites for homogeneous growth are low core-binding ligands with moderate fast ligand exchange in solution, a mild reducing agent to mitigate homonucleation and a strong affinity of a second ligand system that can bind to the shell's surface. The simplicity of the described synthetic route can potentially be adapted to various other material libraries to obtain atomically smooth core-shell systems.
Collapse
|
4
|
Tuning the morphology of bimetallic gold-platinum nanorods in a microflow synthesis. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127085] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
5
|
Kim J, Kim HE, Lee H. Single-Atom Catalysts of Precious Metals for Electrochemical Reactions. CHEMSUSCHEM 2018; 11:104-113. [PMID: 28895315 DOI: 10.1002/cssc.201701306] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Indexed: 05/23/2023]
Abstract
Single-atom catalysts (SACs), in which metal atoms are dispersed on the support without forming nanoparticles, have been used for various heterogeneous reactions and most recently for electrochemical reactions. In this Minireview, recent examples of single-atom electrocatalysts used for the oxygen reduction reaction (ORR), hydrogen oxidation reaction (HOR), hydrogen evolution reaction (HER), formic acid oxidation reaction (FAOR), and methanol oxidation reaction (MOR) are introduced. Many density functional theory (DFT) simulations have predicted that SACs may be effective for CO2 reduction to methane or methanol production while suppressing H2 evolution, and those cases are introduced here as well. Single atoms, mainly Pt single atoms, have been deposited on TiN or TiC nanoparticles, defective graphene nanosheets, N-doped covalent triazine frameworks, graphitic carbon nitride, S-doped zeolite-templated carbon, and Sb-doped SnO2 surfaces. Scanning transmission electron microscopy, extended X-ray absorption fine structure measurement, and in situ infrared spectroscopy have been used to detect the single-atom structure and confirm the absence of nanoparticles. SACs have shown high mass activity, minimizing the use of precious metal, and unique selectivity distinct from nanoparticle catalysts owing to the absence of ensemble sites. Additional features that SACs should possess for effective electrochemical applications were also suggested.
Collapse
Affiliation(s)
- Jiwhan Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Hee-Eun Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Hyunjoo Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| |
Collapse
|
6
|
Su S, Zhang C, Yuwen L, Liu X, Wang L, Fan C, Wang L. Uniform Au@Pt core-shell nanodendrites supported on molybdenum disulfide nanosheets for the methanol oxidation reaction. NANOSCALE 2016; 8:602-8. [PMID: 26645896 DOI: 10.1039/c5nr06077j] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Herein, we presented a facile seeded growth method to prepare high-quality three-dimensional (3D) Au@Pt bimetallic nanodendrite-decorated molybdenum disulfide (MoS2) nanosheets (Au@Pt/MoS2). Transmission electron microscopy (TEM) and high-resolution TEM exhibited that Au@Pt core-shell nanostructures were dispersed onto the surface of MoS2 nanosheets. More importantly, the thickness of the Pt shell of the Au@Pt bimetallic nanodendrites on the surface of the MoS2 nanosheets could be easily tuned via simply changing the synthesis parameters, such as the concentration of H2PtCl6, reaction time and temperature, which greatly influence the catalytic ability of Au@Pt/MoS2 nanohybrids. Both cyclic voltammetry (CV) and chronoamperometry (CA) demonstrated that the as-prepared Au@Pt/MoS2 nanohybrids possessed much higher electrocatalytic activity and stability than Pt/MoS2 or commercial Pt/C catalyst. The peak current mass density of the selected Au@Pt/MoS2 was 6.24 A mg(-1), which was 3389 and 20.3 times those of Pt/C (0.00184 A mg(-1)) and Pt/MoS2 (0.307 A mg(-1)), respectively. The presented method may be a facile approach for the synthesis of MoS2-supported bimetallic nanocomposites, which is significant for the development of high performance MoS2-based sensors and catalysts.
Collapse
Affiliation(s)
- Shao Su
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Chi Zhang
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Lihui Yuwen
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Xingfen Liu
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Lihua Wang
- Division of Physical Biology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
| | - Chunhai Fan
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China and Division of Physical Biology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
| | - Lianhui Wang
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| |
Collapse
|
7
|
Ham S, Jang H, Song Y, Shuford KL, Park S. Octahedral and Cubic Gold Nanoframes with Platinum Framework. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503996] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Songyi Ham
- Department of Chemistry, Sungkyunkwan University, Suwon 440‐746 (South Korea)
| | - Hee‐Jeong Jang
- Department of Chemistry, Sungkyunkwan University, Suwon 440‐746 (South Korea)
| | - Yookyung Song
- Department of Chemistry, Sungkyunkwan University, Suwon 440‐746 (South Korea)
| | - Kevin L. Shuford
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798 (USA)
| | - Sungho Park
- Department of Chemistry, Sungkyunkwan University, Suwon 440‐746 (South Korea)
| |
Collapse
|
8
|
Ham S, Jang HJ, Song Y, Shuford KL, Park S. Octahedral and Cubic Gold Nanoframes with Platinum Framework. Angew Chem Int Ed Engl 2015; 54:9025-8. [DOI: 10.1002/anie.201503996] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Indexed: 11/08/2022]
|
9
|
Yu Y, Zhang Q, Yao Q, Xie J, Lee JY. Architectural design of heterogeneous metallic nanocrystals--principles and processes. Acc Chem Res 2014; 47:3530-40. [PMID: 25343731 DOI: 10.1021/ar5002704] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
CONSPECTUS: Heterogeneous metal nanocrystals (HMNCs) are a natural extension of simple metal nanocrystals (NCs), but as a research topic, they have been much less explored until recently. HMNCs are formed by integrating metal NCs of different compositions into a common entity, similar to the way atoms are bonded to form molecules. HMNCs can be built to exhibit an unprecedented architectural diversity and complexity by programming the arrangement of the NC building blocks ("unit NCs"). The architectural engineering of HMNCs involves the design and fabrication of the architecture-determining elements (ADEs), i.e., unit NCs with precise control of shape and size, and their relative positions in the design. Similar to molecular engineering, where structural diversity is used to create more property variations for application explorations, the architectural engineering of HMNCs can similarly increase the utility of metal NCs by offering a suite of properties to support multifunctionality in applications. The architectural engineering of HMNCs calls for processes and operations that can execute the design. Some enabling technologies already exist in the form of classical micro- and macroscale fabrication techniques, such as masking and etching. These processes, when used singly or in combination, are fully capable of fabricating nanoscopic objects. What is needed is a detailed understanding of the engineering control of ADEs and the translation of these principles into actual processes. For simplicity of execution, these processes should be integrated into a common reaction system and yet retain independence of control. The key to architectural diversity is therefore the independent controllability of each ADE in the design blueprint. The right chemical tools must be applied under the right circumstances in order to achieve the desired outcome. In this Account, after a short illustration of the infinite possibility of combining different ADEs to create HMNC design variations, we introduce the fabrication processes for each ADE, which enable shape, size, and location control of the unit NCs in a particular HMNC design. The principles of these processes are discussed and illustrated with examples. We then discuss how these processes may be integrated into a common reaction system while retaining the independence of individual processes. The principles for the independent control of each ADE are discussed in detail to lay the foundation for the selection of the chemical reaction system and its operating space.
Collapse
Affiliation(s)
- Yue Yu
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, 10 Kent
Ridge Crescent, Singapore 119260, Singapore
| | - Qingbo Zhang
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, 10 Kent
Ridge Crescent, Singapore 119260, Singapore
| | - Qiaofeng Yao
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, 10 Kent
Ridge Crescent, Singapore 119260, Singapore
| | - Jianping Xie
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, 10 Kent
Ridge Crescent, Singapore 119260, Singapore
| | - Jim Yang Lee
- Department of Chemical and
Biomolecular Engineering, National University of Singapore, 10 Kent
Ridge Crescent, Singapore 119260, Singapore
| |
Collapse
|
10
|
Kim C, Kim J, Yang S, Lee H. One-pot synthesis of Pd@PdPt core–shell nanocubes on carbon supports. RSC Adv 2014. [DOI: 10.1039/c4ra13447h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
11
|
Jang HJ, Hong S, Ham S, Shuford KL, Park S. Site-specific growth of a Pt shell on Au nanoplates: tailoring their surface plasmonic behavior. NANOSCALE 2014; 6:7339-7345. [PMID: 24861989 DOI: 10.1039/c4nr01172d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this report, we tune the surface plasmonic behavior of Au nanoplates depending on the morphology of the Pt shell in which Pt is considered as a less optically inactive element. We describe the synthesis of flat Au nanoplates coated with Pt via rim-preferential or uniform growth methods. Depending on the site-selective growth of Pt on core Au nanoplates, the aspect ratio of the resulting Au@Pt nanoplates was tunable and their corresponding surface plasmon resonance (SPR) bands were controlled accordingly. Although Pt is regarded as an optically weak component in visible and near infrared spectral windows, a Pt coating affects the SPR behavior of core Au nanoplates due to effective surface plasmon (SP) coupling between the Au core and the deposited Pt shell. We systematically investigated the optical properties of uniformly grown (Au@Pt(uni)) and rim-preferentially grown (Au@Pt(rim)) Au@Pt nanoplates by observing their SPR band shifts compared to SPR of Au nanoplates. Due to the structural rigidity conferred by the Pt coating, the Au@Pt nanoplates can be easily transferred to the investigated solvents.
Collapse
Affiliation(s)
- Hee-Jeong Jang
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, South Korea.
| | | | | | | | | |
Collapse
|
12
|
Yang S, Lee H. Atomically Dispersed Platinum on Gold Nano-Octahedra with High Catalytic Activity on Formic Acid Oxidation. ACS Catal 2013. [DOI: 10.1021/cs300809j] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sungeun Yang
- Department of Chemical and Biomolecular
Engineering, Yonsei University, Seoul 120-749,
Republic of Korea
| | - Hyunjoo Lee
- Department of Chemical and Biomolecular
Engineering, Yonsei University, Seoul 120-749,
Republic of Korea
| |
Collapse
|
13
|
Zhang GR, Zhao D, Feng YY, Zhang B, Su DS, Liu G, Xu BQ. Catalytic Pt-on-Au nanostructures: why Pt becomes more active on smaller Au particles. ACS NANO 2012; 6:2226-2236. [PMID: 22324631 DOI: 10.1021/nn204378t] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Platinum is a widely used precious metal in many catalytic nanostructures. Engineering the surface electronic structure of Pt-containing bi- or multimetallic nanostructure to enhance both the intrinsic activity and dispersion of Pt has remained a challenge. By constructing Pt-on-Au (Pt^Au) nanostructures using a series of monodisperse Au nanoparticles in the size range of 2-14 nm, we disclose herein a new approach to steadily change both properties of Pt in electrocatalysis with downsizing of the Au nanoparticles. A combined tuning of Pt dispersion and its surface electronic structure is shown as a consequence of the changes in the size and valence-band structure of Au, which leads to significantly enhanced Pt mass-activity on the small Au nanoparticles. Fully dispersed Pt entities on the smallest Au nanoparticles (2 nm) exhibit the highest mass-activity to date towards formic acid electrooxidation, being 2 orders of magnitude (75-300 folds) higher than conventional Pt/C catalyst. Fundamental relationships correlating the Pt intrinsic activity in Pt^Au nanostructures with the experimentally determined surface electronic structures (d-band center energies) of the Pt entities and their underlying Au nanoparticles are established.
Collapse
Affiliation(s)
- Gui-Rong Zhang
- Innovative Catalysis Program, Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | | | | | | | | | | | | |
Collapse
|
14
|
Hong JW, Kang SW, Choi BS, Kim D, Lee SB, Han SW. Controlled synthesis of Pd-Pt alloy hollow nanostructures with enhanced catalytic activities for oxygen reduction. ACS NANO 2012; 6:2410-2419. [PMID: 22360814 DOI: 10.1021/nn2046828] [Citation(s) in RCA: 202] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Pd-Pt alloy nanocrystals (NCs) with hollow structures such as nanocages with porous walls and dendritic hollow structures and Pd@Pt core-shell dendritic NCs could be selectively synthesized by a galvanic replacement method with uniform Pd octahedral and cubic NCs as sacrificial templates. Fine control over the degree of galvanic replacement of Pd with Pt allowed the production of Pd-Pt NCs with distinctly different morphologies. The synthesized hollow NCs exhibited considerably enhanced oxygen reduction activities compared to those of Pd@Pt core-shell NCs and a commercial Pt/C catalyst, and their electrocatalytic activities were highly dependent on their morphologies. The Pd-Pt nanocages prepared from octahedral Pd NC templates exhibited the largest improvement in catalytic performance. We expect that the present work will provide a promising strategy for the development of efficient oxygen reduction electrocatalysts and can also be extended to the preparation of other hybrid or hetero-nanostructures with desirable morphologies and functions.
Collapse
Affiliation(s)
- Jong Wook Hong
- Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon 305-701, Korea
| | | | | | | | | | | |
Collapse
|
15
|
|
16
|
Zhang K, Hu X, Liu J, Yin JJ, Hou S, Wen T, He W, Ji Y, Guo Y, Wang Q, Wu X. Formation of PdPt alloy nanodots on gold nanorods: tuning oxidase-like activities via composition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:2796-2803. [PMID: 21332216 DOI: 10.1021/la104566e] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The island growth mode of Pt was employed to guide the forma-tion of PdPt alloy nanodots on gold nanorods (Au@PdPt NRs). Well-defined alloy nanodots, with tunable Pd/Pt ratios from 0.2 to 5, distribute homogeneously on the surface of the Au NR. Formation of nanodots shell leads to the red-shift and broadening of the longitudinal surface plasmon resonance (LSPR) band of the Au NRs. The Au@PdPt alloy NRs exhibit catalytic activity toward oxidation of often-used chromogenic substrates by dissolved oxygen under mild conditions, suggesting a new type of oxidase mimics. Composition dependence catalytic activity is observed for the oxidation of ascorbic acid (AA) and 3,3',5,5'-tetramethylbenzidine (TMB) and for the reduction of p-nitrophenol. For AA and TMB, catalytic activity enhances quickly at lower Pd/Pt ratios and tends to saturate at higher Pd/Pt ratios. For p-nitrophenol reduction, catalytic activity shows a nice linear relationship with Pd/Pt ratio owing to much higher catalytic activity of Pd. In conclusion, proper alloying of Pd and Pt presents an effective route to tailor the catalytic activity. Interesting, alloy nanodots can also catalyze the oxidation of Fe (II) to Fe (III) by dissolved oxygen. Thus, based on the competitive oxidation of TMB and Fe (II), selective detection of the latter can be achieved.
Collapse
Affiliation(s)
- Ke Zhang
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology , Zhongguancun, Beiyitiao No. 11, Beijing, 100190, P. R. China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Min M, Kim C, Yang YI, Yi J, Lee H. Top-down shaping of metal nanoparticles in solution: partially etched Au@Pt nanoparticles with unique morphology. Chem Commun (Camb) 2011; 47:8079-81. [DOI: 10.1039/c1cc11742d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
18
|
Hunyadi Murph SE, Serkiz SM, Fox EB, Colon-Mercado H, Sexton L, Siegfried M. Synthesis, Functionalization, Characterization, and Application of Controlled Shape Nanoparticles in Energy Production. ACS SYMPOSIUM SERIES 2011. [DOI: 10.1021/bk-2011-1064.ch008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Simona E. Hunyadi Murph
- National and Homeland Security, Savannah River National Laboratory, Savannah River Site, Aiken, SC 29808
| | - Steven M. Serkiz
- National and Homeland Security, Savannah River National Laboratory, Savannah River Site, Aiken, SC 29808
| | - Elise B. Fox
- National and Homeland Security, Savannah River National Laboratory, Savannah River Site, Aiken, SC 29808
| | - Hector Colon-Mercado
- National and Homeland Security, Savannah River National Laboratory, Savannah River Site, Aiken, SC 29808
| | - Lindsay Sexton
- National and Homeland Security, Savannah River National Laboratory, Savannah River Site, Aiken, SC 29808
| | - Matthew Siegfried
- National and Homeland Security, Savannah River National Laboratory, Savannah River Site, Aiken, SC 29808
| |
Collapse
|
19
|
Min M, Kim C, Lee H. Electrocatalytic properties of platinum overgrown on various shapes of gold nanocrystals. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcata.2010.09.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
20
|
Jiang M, Lim B, Tao J, Camargo PHC, Ma C, Zhu Y, Xia Y. Epitaxial overgrowth of platinum on palladium nanocrystals. NANOSCALE 2010; 2:2406-2411. [PMID: 21080571 DOI: 10.1039/c0nr00324g] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This paper describes a systematic study on the epitaxial overgrowth of Pt on well-defined Pd nanocrystals with different shapes (and exposed facets), including regular octahedrons, truncated octahedrons, and cubes. Two different reducing agents, i.e., citric acid and L-ascorbic acid, were evaluated and compared for the reduction of K₂PtCl₄ in an aqueous solution in the presence of Pd nanocrystal seeds. When citric acid was used as a reducing agent, conformal overgrowth of octahedral Pt shells on regular and truncated octahedrons of Pd led to the formation of Pd-Pt core-shell octahedrons, while non-conformal overgrowth of Pt on cubic Pd seeds resulted in the formation of an incomplete octahedral Pt shell. On the contrary, localized overgrowth of Pt branches was observed when L-ascorbic acid was used as a reducing agent regardless of the facets expressed on the surface of Pd nanocrystal seeds. This work shows that both the binding affinity of a reducing agent to the Pt surface and the reduction kinetics for a Pt precursor play important roles in determining the mode of Pt overgrowth on Pd nanocrystal surface.
Collapse
Affiliation(s)
- Majiong Jiang
- Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA
| | | | | | | | | | | | | |
Collapse
|
21
|
Ataee-Esfahani H, Wang L, Yamauchi Y. Block copolymer assisted synthesis of bimetallic colloids with Au core and nanodendritic Pt shell. Chem Commun (Camb) 2010; 46:3684-6. [PMID: 20393665 DOI: 10.1039/c001516d] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report block copolymer assisted synthesis of a Au metal core coated with a nanodendritic Pt shell (Au@Pt). Herein, a rapid, one-step and efficient wet-chemical route is proposed to straightforwardly synthesize Au@Pt with high yield (approximately 100%), which was mediated by Pluronic F127 block copolymer from the reduction of Pt and Au complexes by ascorbic acid (AA).
Collapse
Affiliation(s)
- Hamed Ataee-Esfahani
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | | | | |
Collapse
|