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Sun B, Hu H, Liu H, Guan J, Song K, Shi C, Cheng H. Highly-exposed copper and ZIF-8 interface enables synthesis of hydrocarbons by electrocatalytic reduction of CO 2. J Colloid Interface Sci 2024; 661:831-839. [PMID: 38330655 DOI: 10.1016/j.jcis.2024.01.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/22/2024] [Accepted: 01/28/2024] [Indexed: 02/10/2024]
Abstract
Electrochemical reduction of CO2 (CO2RR) to fuels and chemicals is a promising route to close the anthropogenic carbon cycle for sustainable society. The Cu-based catalysts in producing high-value hydrocarbons feature unique superiorities, yet challenges remain in achieving high selectivity. In this work, Cu@ZIF-8 NWs with highly-exposed Cu nanowires (Cu NWs) and ZIF-8 interface are synthesized via a surfactant-assisted method. Impressively, Cu@ZIF-8 NWs exhibit excellent stability and a high Faradaic efficiency of 57.5% toward hydrocarbons (CH4 and C2H4) at a potential of -0.7 V versus reversible hydrogen electrode. Computational calculations combining with experiments reveal the formation of Cu and ZIF-8 interface optimizes the adsorption of reaction intermediates, particularly stabilizing the formation of *CHO, thereby enabling efficient preference for hydrocarbons. This work highlights the potential of constructing metals and MOFs heterogeneous interfaces to enhance catalytic properties and offers valuable insights for the design of highly efficient CO2RR catalysts.
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Affiliation(s)
- Bo Sun
- Collaborative Innovation Center of Nonferrous Metals, School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Hao Hu
- Collaborative Innovation Center of Nonferrous Metals, School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China.
| | - Hangchen Liu
- Collaborative Innovation Center of Nonferrous Metals, School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Jiangyi Guan
- Collaborative Innovation Center of Nonferrous Metals, School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Kexing Song
- Henan Academy of Sciences, Zhengzhou 450002, China.
| | - Changrui Shi
- Collaborative Innovation Center of Nonferrous Metals, School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Haoyan Cheng
- Collaborative Innovation Center of Nonferrous Metals, School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China.
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2
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Nguyen DK, Vargheese V, Liao V, Dimitrakellis P, Sourav S, Zheng W, Vlachos DG. Plasma-Enabled Ligand Removal for Improved Catalysis: Furfural Conversion on Pd/SiO 2. ACS NANO 2023; 17:21480-21492. [PMID: 37906709 DOI: 10.1021/acsnano.3c06310] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
A nonthermal, atmospheric He/O2 plasma (NTAP) successfully removed polyvinylpyrrolidone (PVP) from Pd cubic nanoparticles supported on SiO2 quickly and controllably. Transmission electron microscopy (TEM) revealed that the shape and size of Pd nanoparticles remain intact during plasma treatment, unlike mild calcination, which causes sintering and polycrystallinity. Using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS), we demonstrate the quantitative estimation of the PVP plasma removal rate and control of the nanoparticle synthesis. First-principles calculations of the XPS and CO FTIR spectra elucidate electron transfer from the ligand to the metal and allow for estimates of ligand coverages. Reactivity testing indicated that PVP surface crowding inhibits furfural conversion but does not alter furfural selectivity. Overall, the data demonstrate NTAP as a more efficient method than traditional calcination for organic ligand removal in nanoparticle synthesis.
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Affiliation(s)
- Darien K Nguyen
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- RAPID Manufacturing Institute, Delaware Energy Institute (DEI), Newark, Delaware 19716, United States
| | - Vibin Vargheese
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- RAPID Manufacturing Institute, Delaware Energy Institute (DEI), Newark, Delaware 19716, United States
| | - Vinson Liao
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- RAPID Manufacturing Institute, Delaware Energy Institute (DEI), Newark, Delaware 19716, United States
| | - Panagiotis Dimitrakellis
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- RAPID Manufacturing Institute, Delaware Energy Institute (DEI), Newark, Delaware 19716, United States
| | - Sagar Sourav
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- RAPID Manufacturing Institute, Delaware Energy Institute (DEI), Newark, Delaware 19716, United States
| | - Weiqing Zheng
- Catalysis Center for Energy Innovation, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- RAPID Manufacturing Institute, Delaware Energy Institute (DEI), Newark, Delaware 19716, United States
| | - Dionisios G Vlachos
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- Catalysis Center for Energy Innovation, University of Delaware, 150 Academy Street, Newark, Delaware 19716, United States
- RAPID Manufacturing Institute, Delaware Energy Institute (DEI), Newark, Delaware 19716, United States
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3
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Wang Y, Hao M. Metal Nanoclusters Synthesized in Alkaline Ethylene Glycol: Mechanism and Application. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:565. [PMID: 36770526 PMCID: PMC9922003 DOI: 10.3390/nano13030565] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/20/2023] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
The "unprotected" metal and alloy nanoclusters (UMCs) prepared by the alkaline ethylene glycol method, which are stabilized with simple ions and solvent molecules, have the advantages of a small particle size, a narrow size distribution, good stability, highly efficient preparation, easy separation, surface modification and transfer between different phases. They can be composited with diverse materials to prepare catalytic systems with controllable structures, providing an effective means of studying the different factors' effects on the catalytic properties separately. UMCs have been widely used in the development of high-performance catalysts for a variety of functional systems. This paper will review the research progress on the formation mechanism of the unprotected metal nanoclusters, exploring the structure-function relationship of metal nanocluster catalysts and the preparation of excellent metal catalysts using the unprotected metal nanoclusters as building blocks or starting materials. A principle of the influence of carriers, ligands and modifiers in metal nanocluster catalysts on the catalytic properties is proposed.
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Affiliation(s)
- Yuan Wang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- Sunan Institute for Molecular Engineering, Peking University, Changshu 215500, China
| | - Menggeng Hao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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4
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Mitrevska K, Cernei N, Michalkova H, Rodrigo MAM, Sivak L, Heger Z, Zitka O, Kopel P, Adam V, Milosavljevic V. Platinum-based drug-induced depletion of amino acids in the kidneys and liver. Front Oncol 2022; 12:986045. [PMID: 36212465 PMCID: PMC9535364 DOI: 10.3389/fonc.2022.986045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 08/31/2022] [Indexed: 11/13/2022] Open
Abstract
Cisplatin (cis-diamminedichloroplatinum II; CDDP) is a widely used cytostatic agent; however, it tends to promote kidney and liver disease, which are a major signs of drug-induced toxicity. Platinum compounds are often presented as alternative therapeutics and subsequently easily dispersed in the environment as contaminants. Due to the major roles of the liver and kidneys in removing toxic materials from the human body, we performed a comparative study of the amino acid profiles in chicken liver and kidneys before and after the application of CDDP and platinum nanoparticles (PtNPs-10 and PtNPs-40). The treatment of the liver with the selected drugs affected different amino acids; however, Leu and Arg were decreased after all treatments. The treatment of the kidneys with CDDP mostly affected Val; PtNPs-10 decreased Val, Ile and Thr; and PtNPs-40 affected only Pro. In addition, we tested the same drugs on two healthy cell lines, HaCaT and HEK-293, and ultimately explored the amino acid profiles in relation to the tricarboxylic acid cycle (TCA) and methionine cycle, which revealed that in both cell lines, there was a general increase in amino acid concentrations associated with changes in the concentrations of the metabolites of these cycles.
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Affiliation(s)
- Katerina Mitrevska
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czechia
| | - Natalia Cernei
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czechia
| | - Hana Michalkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czechia
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia
| | | | - Ladislav Sivak
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czechia
| | - Zbynek Heger
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czechia
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia
| | - Ondrej Zitka
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czechia
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia
| | - Pavel Kopel
- Department of Inorganic Chemistry, Faculty of Science, Palacky University, Olomouc, Czechia
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czechia
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia
| | - Vedran Milosavljevic
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czechia
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia
- *Correspondence: Vedran Milosavljevic,
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5
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Pt-Based Multimetal Electrocatalysts and Potential Applications: Recent Advancements in the Synthesis of Nanoparticles by Modified Polyol Methods. CRYSTALS 2022. [DOI: 10.3390/cryst12030375] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In our review, we have presented a summary of the research accomplishments of nanostructured multimetal-based electrocatalysts synthesized by modified polyol methods, especially the special case of Pt-based nanoparticles associated with increasing potential applications for batteries, capacitors, and fuel cells. To address the problems raised in serious environmental pollution, disease, health, and energy shortages, we discuss and present an improved polyol process used to synthesize nanoparticles from Pt metal to Pt-based bimetal, and Pt-based multimetal catalysts in the various forms of alloy and shell core nanostructures by practical experience, experimental skills, and the evidences from the designed polyol processes. In their prospects, there are the micro/nanostructured variants of hybrid Pt/nanomaterials, typically such as Pt/ABO3-type perovskite, Pt/AB2O4-type ferrite, Pt/CoFe2O4, Pt/oxide, or Pt/ceramic by modified polyol processes for the development of electrocatalysis and energy technology. In the future, we suggest that both the polyol and the sol-gel processes of diversity and originality, and with the use of various kinds of water, alcohols, polyols, other solvents, reducing agents, long-term capping and stabilizing agents, and structure- and property-controlling agents, are very effectively used in the controlled synthesis of micro/nanoparticles and micro/nanomaterials. It is understood that at the levels of controlling and modifying molecules, ions, atoms, and nano/microscales, the polyol or sol-gel processes, and their technologies are effectively combined in bottom-up and top-down approaches, as are the simplest synthetic methods of physics, chemistry, and biology from the most common aqueous solutions as well as possible experimental conditions.
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6
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The Effect of Shape-Controlled Pt and Pd Nanoparticles on Selective Catalytic Hydrodechlorination of Trichloroethylene. Catalysts 2020. [DOI: 10.3390/catal10111314] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Tailoring the shape of nanoscale materials enables obtaining morphology-controlled surfaces exhibiting specific interactions with reactants during catalytic reactions. The specifics of nanoparticle surfaces control the catalytic performance, i.e., activity and selectivity. In this study, shape-controlled Platinum (Pt) and Palladium (Pd) nanoparticles with distinct morphology were produced, i.e., cubes and cuboctahedra for Pt and spheres and polyhedra/multiple-twins for Pd, with (100), (111 + 100), curved/stepped and (111) facets, respectively. These particles with well-tuned surfaces were subsequently deposited on a Zirconium oxide (ZrO2) support. The morphological characteristics of the particles were determined by high resolution transmission electron microscopy (HR-TEM) and X-ray diffraction (XRD), while their adsorption properties were investigated by Fourier transform infrared spectroscopy (FTIR) of CO adsorbed at room temperature. The effect of the nanoparticle shape and surface structure on the catalytic performance in hydrodechlorination (HDCl) of trichloroethylene (TCE) was examined. The results show that nanoparticles with different surface orientations can be employed to affect selectivity, with polyhedral and multiply-twinned Pd exhibiting the best ethylene selectivity.
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7
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Li X, Yu S, Li K, Ma C, Zhang J, Li H, Chang X, Zhu L, Xue Q. Enhanced gas separation performance of Pebax mixed matrix membranes by incorporating ZIF-8 in situ inserted by multiwalled carbon nanotubes. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117080] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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9
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K. Kehoe D, Romeral L, Lundy R, A. Morris M, G. Lyons M, Gun’ko YK. One Dimensional AuAg Nanostructures as Anodic Catalysts in the Ethylene Glycol Oxidation. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E719. [PMID: 32290300 PMCID: PMC7221585 DOI: 10.3390/nano10040719] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/01/2020] [Accepted: 04/06/2020] [Indexed: 11/17/2022]
Abstract
Direct alcohol fuel cells are highly promising as efficient power sources for various mobile and portable applications. However, for the further advancement of fuel cell technology it is necessary to develop new, cost-effective Pt-free electrocatalysts that could provide efficient alcohol oxidation and also resist cross-over poisoning. Here, we report new electrocatalytic materials for ethylene glycol oxidation, which are based on AuAg linear nanostructures. We demonstrate a low temperature tunable synthesis that enables the preparation of one dimensional (1D) AuAg nanostructures ranging from nanowires to a new nano-necklace-like structure. Using a two-step method, we showed that, by aging the initial reaction mixture at various temperatures, we produced ultrathin AuAg nanowires with a diameter of 9.2 ± 2 and 3.8 ± 1.6 nm, respectively. These nanowires exhibited a high catalytic performance for the electro-oxidation of ethylene glycol with remarkable poisoning resistance. These results highlight the benefit of 1D metal alloy-based nanocatalysts for fuel cell applications and are expected to make an important contribution to the further development of fuel cell technology.
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Affiliation(s)
| | | | | | | | | | - Yurii K. Gun’ko
- School of Chemistry, Trinity College Dublin, Dublin 2, Ireland; (D.K.K.); (L.R.); (R.L.); (M.A.M.); (M.G.L.)
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10
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Safo IA, Dosche C, Özaslan M. Effects of Capping Agents on the Oxygen Reduction Reaction Activity and Shape Stability of Pt Nanocubes. Chemphyschem 2019; 20:3010-3023. [PMID: 31538400 PMCID: PMC6899920 DOI: 10.1002/cphc.201900653] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 08/26/2019] [Indexed: 11/11/2022]
Abstract
We investigated the formation of Pt nanocubes (NCs) and their electrocatalytic oxygen reduction reaction (ORR) properties and structural stability using two different capping agents, namely, polyvinylpyrrolidone (PVP) and oleylamine (OAm). The mono-dispersity of the obtained Pt NCs and their interactions with PVP and OAm were analyzed by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), Fourier-transformed infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The TEM data show a high mono-dispersity (82 %) and a large mean particle size (9-10 nm) for the Pt NCs obtained by the oleylamine-assisted method compared to those prepared via the PVP-assisted procedure (68 %, 6-7 nm). FTIR, XPS, and TGA data show that PVP and OAm still remain at the Pt surface, despite washing. Interestingly, the OAm-capped Pt NCs show significantly higher electrochemically active surface area (ECSA) and ORR activity than the PVP-capped ones. An accelerated stress protocol, however, reveals that the OAm-capped NCs possess a poor structural stability during electrochemical cycling. The loss of a defined surface arrangement in the NCs is connected with a transformation into a near-spherical particle shape. In contrast, the PVP-capped NCs mainly retain their particle shape due to their strong capping behavior. In addition, we have developed a degradation model for NCs as a function of electrochemical parameters such as upper potential and cycle number. Altogether, we provide fundamental insights into the electronic interactions between capping agent and Pt NCs and the role of the adsorption strength of the capping agent in improving the electrochemical ORR performance as well as the structural stability of shape-controlled nanoparticles.
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Affiliation(s)
- Isaac A. Safo
- Physical ChemistryCarl von Ossietzky University of Oldenburg26129OldenburgGermany
| | - Carsten Dosche
- Physical ChemistryCarl von Ossietzky University of Oldenburg26129OldenburgGermany
| | - Mehtap Özaslan
- Physical ChemistryCarl von Ossietzky University of Oldenburg26129OldenburgGermany
- Institute of Technical ChemistryTechnical University of Braunschweig38106BraunschweigGermany
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11
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Devivaraprasad R, Nalajala N, Bera B, Neergat M. Electrocatalysis of Oxygen Reduction Reaction on Shape-Controlled Pt and Pd Nanoparticles-Importance of Surface Cleanliness and Reconstruction. Front Chem 2019; 7:648. [PMID: 31637231 PMCID: PMC6787902 DOI: 10.3389/fchem.2019.00648] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 09/10/2019] [Indexed: 01/04/2023] Open
Abstract
Shape-controlled precious metal nanoparticles have attracted significant research interest in the recent past due to their fundamental and scientific importance. Because of their crystallographic-orientation-dependent properties, these metal nanoparticles have tremendous implications in electrocatalysis. This review aims to discuss the strategies for synthesis of shape-controlled platinum (Pt) and palladium (Pd) nanoparticles and procedures for the surfactant removal, without compromising their surface structural integrity. In particular, the electrocatalysis of oxygen reduction reaction (ORR) on shape-controlled nanoparticles (Pt and Pd) is discussed and the results are analyzed in the context of that reported with single crystal electrodes. Accepted theories on the stability of precious metal nanoparticle surfaces under electrochemical conditions are revisited. Dissolution, reconstruction, and comprehensive views on the factors that contribute to the loss of electrochemically active surface area (ESA) of nanoparticles leading to an inevitable decrease in ORR activity are presented. The contribution of adsorbed electrolyte anions, in-situ generated adsorbates and contaminants toward the ESA reduction are also discussed. Methods for the revival of activity of surfaces contaminated with adsorbed impurities without perturbing the surface structure and its implications to electrocatalysis are reviewed.
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Affiliation(s)
- Ruttala Devivaraprasad
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Naresh Nalajala
- National Chemical Laboratory, Catalysis Division, Pune, India
| | - Bapi Bera
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Manoj Neergat
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai, India
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12
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Yan M, Wu T, Chen L, Yu Y, Liu B, Wang Y, Chen W, Liu Y, Lian C, Li Y. Effect of Protective Agents upon the Catalytic Property of Platinum Nanocrystals. ChemCatChem 2018. [DOI: 10.1002/cctc.201800133] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Muyu Yan
- Department of Chemistry; School of Science; Beijing Jiaotong University; Beijing 100044 China
| | - Tong Wu
- Department of Chemistry; School of Science; Beijing Jiaotong University; Beijing 100044 China
| | - Lifang Chen
- Beijing National Laboratory for Molecular Sciences; State Key Laboratory for Structural Chemistry of Unstable, and Stable Species; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
| | - Yulv Yu
- Beijing National Laboratory for Molecular Sciences; State Key Laboratory for Structural Chemistry of Unstable, and Stable Species; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
| | - Bo Liu
- Department of Chemistry; School of Science; Beijing Jiaotong University; Beijing 100044 China
| | - Yuan Wang
- Beijing National Laboratory for Molecular Sciences; State Key Laboratory for Structural Chemistry of Unstable, and Stable Species; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
| | - Wenxing Chen
- Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Yan Liu
- Beijing National Laboratory for Molecular Sciences; State Key Laboratory for Structural Chemistry of Unstable, and Stable Species; College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
| | - Chao Lian
- Department of Chemistry; School of Science; Beijing Jiaotong University; Beijing 100044 China
| | - Yadong Li
- Department of Chemistry; Tsinghua University; Beijing 100084 China
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13
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Safo IA, Dosche C, Oezaslan M. TEM, FTIR and Electrochemistry Study: Desorption of PVP from Pt Nanocubes. ACTA ACUST UNITED AC 2018. [DOI: 10.1515/zpch-2018-1147] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Polyvinylpyrrolidone (PVP) polymer is among one of the widely used surfactants to prepare nano-materials with desired particle shape and particle size. The critical challenge is to remove PVP polymer from the metal surface without loss of the surface arrangement and particle agglomeration. Here, we developed a strategy to remove the surfactant PVP which prefers to form a multi-layer shell and thus blocks the catalytically active surface of the Pt nanocubes (6–7 nm). Since PVP is partially soluble in polar solvents, we studied four different solvent mixtures (volume ratio), (i) methanol/ethanol (3:1), (ii) acetone/water (3:1), (iii) ethanol/chloroform (3:1), and (iv) aqueous 0.1 M acetic acid by using transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR) and cyclic voltammetry (CV). Only, the washing process with methanol/ethanol and acetone/water generates Pt nanocubes with almost clean particle surface. Based on our FTIR results, a shift of the carbonyl band in IR spectrum was observed for methanol/ethanol-washed Pt nanocubes, indicating the coordination of the carbonyl oxygen of the PVP to platinum. The electrochemical experiments showed that the surface area of the methanol/ethanol-washed Pt nanocubes was increased by a factor of 14 compared to the unwashed, while an improvement of 11 times was achieved by washing in acetone/water. However, the CV profile still signifies the presence of strongly adsorbed PVP on the Pt surface. To remove the chemisorbed PVP, an electrochemical cleaning including 200 potential cycles between 0.06 and 1.00 V vs. RHE at 200 mV s−1 was applied. The potential cycling reveals the potential-controlled ad/desorption behavior of the PVP at the Pt surface. Altogether, we designed a cleaning procedure for surfactant-capped metal nanoparticles and provide insights into the interactions between the PVP and Pt surface.
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Affiliation(s)
- Isaac A. Safo
- Physical Chemistry , Carl von Ossietzky University of Oldenburg , 26111 Oldenburg , Germany
| | - Carsten Dosche
- Physical Chemistry , Carl von Ossietzky University of Oldenburg , 26111 Oldenburg , Germany
| | - Mehtap Oezaslan
- Physical Chemistry , Carl von Ossietzky University of Oldenburg , 26111 Oldenburg , Germany
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14
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El Sawy EN, Birss VI. Nanoengineered Ir core@Pt shell Nanoparticles with Controlled Pt Shell Coverages for Direct Methanol Electro-Oxidation. ACS APPLIED MATERIALS & INTERFACES 2018; 10:3459-3469. [PMID: 29302959 DOI: 10.1021/acsami.7b13080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The design and application of bimetallic alloy nanoparticles (NPs) for electrocatalytic applications are challenged by the need to clearly identify and understand the individual effect of each component. In the present work, the focus has been on PtIr NPs, with alloyed NPs being previously shown to be active toward the methanol oxidation reaction (MOR), but for which the mode of action of the Ir component remains uncertain. We have therefore nanoengineered a family of Ircore@Ptshell NPs, using a modified polyol method, to control the Pt shell coverage (up to 2 monolayers) and thus to allow the separation of the bifunctional and electronic effects of Ir on the Pt activity. It is shown that the Ir core size and crystallinity do not change with the deposition of the Pt shell, as confirmed by transmission electron microscopy and X-ray diffraction. CO stripping and hydrogen underpotential deposition/removal were used for the first time to determine the surface composition of the Ircore@Ptshell NPs. It is shown that the Ircore enhances the MOR activity of the Ptshell primarily through the bifunctional effect, with an optimum Pt coverage of 0.4 of a monolayer. At 60 °C, an additional electronic effect of Ir on Pt can be discerned, causing an inhibition in the MOR rate by weakening the adsorption of methanol on the Ptshell, thus helping to remove the adsorbed CO intermediate from the shell surface.
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Affiliation(s)
- Ehab N El Sawy
- Department of Chemistry, University of Calgary , 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Viola I Birss
- Department of Chemistry, University of Calgary , 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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15
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Microwave-Irradiation Polyol Synthesis of PVP-Protected Pt–Ni Electrocatalysts for Methanol Oxidation Reaction. Electrocatalysis (N Y) 2017. [DOI: 10.1007/s12678-017-0441-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Gharibshahi E, Saion E, Ashraf A, Gharibshahi L. Size-Controlled and Optical Properties of Platinum Nanoparticles by Gamma Radiolytic Synthesis. Appl Radiat Isot 2017; 130:211-217. [PMID: 29028581 DOI: 10.1016/j.apradiso.2017.09.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 08/03/2017] [Accepted: 09/08/2017] [Indexed: 10/18/2022]
Abstract
Gamma radiolytic synthesis was used to produce size-controlled spherical platinum nanoparticles from an aqueous solution containing platinum tetraammine and polyvinyl pyrrolidone. The structural characterizations were performed using X-ray diffraction, and transmission electron microscopy. The transmission electron microscopy was used to determine the average particle diameter, which decreased from 4.4nm at 80kGy to 2.8nm at 120kGy. The UV-visible absorption spectrum was measured and found that platinum nanoparticles exhibit two steady absorption maxima in UV regions due to plasmonic excitation of conduction electrons, which blue shifted to lower wavelengths with a decrease in particle size. We consider the conduction electrons of platinum nanoparticles to follow Thomas-Fermi-Dirac-Weizsacker atomic model that they are not entirely free but weakly bounded to particles at lower-energy states {n = 5, l = 2 or 5d} and {n = 6, l = 0 or 6s}, which upon receiving UV photon energy the electrons make intra-band quantum excitations to higher-energy states allowed by the principles of quantum number that results the absorption maxima. We found an excellent agreement between the experimental and theoretical results, which suggest that the optical absorption of metal nanoparticles could be fundamentally described by a quantum mechanical interpretation, which could be more relevant to photo-catalysis and heterogeneous catalysis.
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Affiliation(s)
- Elham Gharibshahi
- Department of Physics, Faculty of Science, University of Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia; Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
| | - Elias Saion
- Department of Physics, Faculty of Science, University of Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Ahmadreza Ashraf
- Department of Physics, Faculty of Science, University of Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
| | - Leila Gharibshahi
- Department of Physics, Faculty of Science, University of Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
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17
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Electrochemical Cleaning of Polyvinylpyrrolidone-capped Pt Nanocubes for the Oxygen Reduction Reaction. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.118] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Simakova IL, Demidova YS, Gläsel J, Murzina EV, Schubert T, Prosvirin IP, Etzold BJM, Murzin DY. Controlled synthesis of PVP-based carbon-supported Ru nanoparticles: synthesis approaches, characterization, capping agent removal and catalytic behavior. Catal Sci Technol 2016. [DOI: 10.1039/c6cy02086k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
PVP-capped Ru nanoparticles were synthesized, immobilized on several carbon supports and tested in galactose hydrogenation.
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Affiliation(s)
- I. L. Simakova
- Boreskov Institute of Catalysis
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - Yu. S. Demidova
- Boreskov Institute of Catalysis
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | - J. Gläsel
- Technische Universität Darmstadt
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie
- Darmstadt
- Germany
| | | | | | | | - B. J. M. Etzold
- Technische Universität Darmstadt
- Ernst-Berl-Institut für Technische und Makromolekulare Chemie
- Darmstadt
- Germany
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19
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Sharma A, Mehta SK, Singh S, Gupta S. Synthesized colloidal-supported Pt and bimetallic Pt–Mo nanoparticles as electrocatalyst in oxidation of methanol in alkaline solution. J APPL ELECTROCHEM 2015. [DOI: 10.1007/s10800-015-0900-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Humphrey JJL, Sadasivan S, Plana D, Celorrio V, Tooze RA, Fermín DJ. Surface activation of Pt nanoparticles synthesised by "hot injection" in the presence of oleylamine. Chemistry 2015; 21:12694-701. [PMID: 26201954 PMCID: PMC4676288 DOI: 10.1002/chem.201501496] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Indexed: 11/18/2022]
Abstract
Oleylamine (OA) based "hot injection" colloidal synthesis offers a versatile approach to the synthesis of highly monodisperse metallic and multi-metallic alloyed nanostructures in the absence of potentially toxic and unstable phosphine compounds. For application in heterogeneous catalysis and electrocatalysis, the adsorbed OA species at the metal surfaces should be effectively removed without compromising the structure and composition of the nanostructures. Herein, we investigate the removal of OA from colloidal Pt nanoparticles through 1) "chemical methods" such as washing in acetic acid or ethanol, and ligand exchange with pyridine; and 2) thermal pre-treatment between 185 and 400 °C in air, H2 or Ar atmospheres. The electrochemical reactivity of Pt nanoparticles is acutely affected by the presence of surface organic impurities, making this material ideal for monitoring the effectiveness of OA removal. The results showed that thermal treatment in Ar at temperatures above 400 °C provides highly active particles, with reactivity comparable to the benchmark commercial catalyst, Pt/ETEK. The mechanism involved in thermal desorption of OA was also investigated by thermogravimetric analysis coupled to mass spectrometry (TGA-MS). Oxidation of HCOOH and adsorbed CO in acidic solution were used as test reactions to assess the Pt electrocatalytic activity.
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Affiliation(s)
- Jo J L Humphrey
- School of Chemistry, University of Bristol, Cantocks Close, Bristol, BS8 1TS (UK), Fax: (+44) 117-927-7985
| | - Sajanikumari Sadasivan
- Sasol Technology UK Ltd. Purdie Building, North Haugh, St Andrews, Fife, Scotland, KY16 9ST (UK)
| | - Daniela Plana
- School of Chemistry, University of Bristol, Cantocks Close, Bristol, BS8 1TS (UK), Fax: (+44) 117-927-7985
| | - Verónica Celorrio
- School of Chemistry, University of Bristol, Cantocks Close, Bristol, BS8 1TS (UK), Fax: (+44) 117-927-7985
| | - Robert A Tooze
- Sasol Technology UK Ltd. Purdie Building, North Haugh, St Andrews, Fife, Scotland, KY16 9ST (UK)
| | - David J Fermín
- School of Chemistry, University of Bristol, Cantocks Close, Bristol, BS8 1TS (UK), Fax: (+44) 117-927-7985.
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21
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Vishwakshan Reddy G, Raghavendra P, Sri Chandana P, Subramanyam Sarma L. Halide-aided controlled fabrication of Pt–Pd/graphene bimetallic nanocomposites for methanol electrooxidation. RSC Adv 2015. [DOI: 10.1039/c5ra14682h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Herein, Pt–Pd/RGO bimetallic nanocomposites were synthesized through a halide-aided fabrication strategy. The Pt–Pd/RGO-15KI with its uniform dispersion exhibits improved methanol electro-oxidation activity compared to Pt–Pd/RGO-0KI.
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Affiliation(s)
- G. Vishwakshan Reddy
- Nanoelectrochemistry Laboratory
- Department of Chemistry
- Yogi Vemana University
- Kadapa – 516 003
- India
| | - P. Raghavendra
- Nanoelectrochemistry Laboratory
- Department of Chemistry
- Yogi Vemana University
- Kadapa – 516 003
- India
| | - P. Sri Chandana
- Department of Civil and Environmental Engineering
- Annamacharya Institute of Technology & Sciences
- Kadapa – 516 003
- India
| | - L. Subramanyam Sarma
- Nanoelectrochemistry Laboratory
- Department of Chemistry
- Yogi Vemana University
- Kadapa – 516 003
- India
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22
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Koczkur KM, Mourdikoudis S, Polavarapu L, Skrabalak SE. Polyvinylpyrrolidone (PVP) in nanoparticle synthesis. Dalton Trans 2015; 44:17883-905. [DOI: 10.1039/c5dt02964c] [Citation(s) in RCA: 911] [Impact Index Per Article: 101.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The versatile role of PVP in nanoparticle synthesis is discussed in this Perspective article.
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Affiliation(s)
| | | | - Lakshminarayana Polavarapu
- Photonics and Optoelectronics Group
- Department of Physics and CeNS
- Ludwig-Maximilians-Universität München
- Munich
- Germany
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23
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The Effect of Reducing Agents on the Electronic, Magnetic and Electrocatalytic Properties of Thiol-Capped Pt/Co and Pt/Ni Nanoparticles. Electrocatalysis (N Y) 2014. [DOI: 10.1007/s12678-014-0241-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Triphenylamine-based dye functionalized platinum colloid for photocatalytic hydrogen evolution from water: Synthesis, characterization, electron transfer, and photocatalysis. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.05.069] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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25
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Devivaraprasad R, Ramesh R, Naresh N, Kar T, Singh RK, Neergat M. Oxygen reduction reaction and peroxide generation on shape-controlled and polycrystalline platinum nanoparticles in acidic and alkaline electrolytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:8995-9006. [PMID: 24984161 DOI: 10.1021/la501109g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Shape-controlled Pt nanoparticles (cubic, tetrahedral, and cuboctahedral) are synthesized using stabilizers and capping agents. The nanoparticles are cleaned thoroughly and electrochemically characterized in acidic (0.5 M H2SO4 and 0.1 M HClO4) and alkaline (0.1 M NaOH) electrolytes, and their features are compared to that of polycrystalline Pt. Even with less than 100% shape-selectivity and with the truncation at the edges and corners as shown by the ex-situ TEM analysis, the voltammetric features of the shape-controlled nanoparticles correlate very well with that of the respective single-crystal surfaces, particularly the voltammograms of shape-controlled nanoparticles of relatively larger size. Shape-controlled nanoparticles of smaller size show somewhat higher contributions from the other orientations as well because of the unavoidable contribution from the truncation at the edges and corners. The Cu stripping voltammograms qualitatively correlate with the TEM analysis and the voltammograms. The fractions of low-index crystallographic orientations are estimated through the irreversible adsorption of Ge and Bi. Pt-nanocubes with dominant {100} facets are the most active toward oxygen reduction reaction (ORR) in strongly adsorbing H2SO4 electrolytes, while Pt-tetrahedral with dominant {111} facets is the most active in 0.1 M HClO4 and 0.1 M NaOH electrolytes. The difference in ORR activity is attributed to both the structure-sensitivity of the catalyst and the inhibiting effect of the anions present in the electrolytes. Moreover, the percentage of peroxide generation is 1.5-5% in weakly adsorbing (0.1 M HClO4) electrolytes and 5-12% in strongly adsorbing (0.5 M H2SO4 and 0.1 M NaOH) electrolytes.
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Affiliation(s)
- Ruttala Devivaraprasad
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay (IITB) , Powai, Mumbai, India 400076
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26
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Wang H, Xia B, Yan Y, Li N, Wang JY, Wang X. Water-Soluble Polymer Exfoliated Graphene: As Catalyst Support and Sensor. J Phys Chem B 2013; 117:5606-13. [DOI: 10.1021/jp401418z] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Haibo Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive,
Singapore 637459, Singapore
| | - Baoyu Xia
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive,
Singapore 637459, Singapore
| | - Ya Yan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive,
Singapore 637459, Singapore
| | - Nan Li
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive,
Singapore 637459, Singapore
| | - Jing-Yuan Wang
- Residues and Resource Reclamation Centre, Nanyang Technological University, Singapore 639798, Singapore
| | - Xin Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive,
Singapore 637459, Singapore
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27
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Hu Y, Wu P, Zhang H, Cai C. Synthesis of graphene-supported hollow Pt–Ni nanocatalysts for highly active electrocatalysis toward the methanol oxidation reaction. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.08.080] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Gharibshahi E, Saion E. Influence of dose on particle size and optical properties of colloidal platinum nanoparticles. Int J Mol Sci 2012. [PMID: 23203091 PMCID: PMC3509607 DOI: 10.3390/ijms131114723] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Attempts to produce colloidal platinum nanoparticles by using steady absorption spectra with various chemical-based reduction methods often resulted in the fast disappearance of the absorption maxima leaving reduced platinum nanoparticles with little information on their optical properties. We synthesized colloidal platinum nanoparticles in an aqueous solution of polyvinyl pyrrolidone by gamma radiolytic reduction method, which produced steady absorption spectra of fully reduced and highly pure platinum nanoparticles free from by-product impurities or reducing agent contamination. The average particle size was found to be in the range of 3.4–5.3 nm and decreased with increasing dose due to the domination of nucleation over ion association in the formation of metal nanoparticles by the gamma radiolytic reduction method. The platinum nanoparticles exhibit optical absorption spectra with two absorption peaks centered at about 216 and 264 nm and the peaks blue shifted to lower wavelengths with decreasing particle size. The absorption spectra of platinum nanoparticles were also calculated using quantum mechanical treatment and coincidently a good agreement was obtained between the calculated and measured absorption peaks at various particle sizes. This indicates that the 216 and 264-nm absorption peaks of platinum nanoparticles conceivably originated from the intra-band transitions of conduction electrons of (n = 5, l = 2) and (n = 6, l = 0) energy states respectively to higher energy states. The absorption energies, i.e., conduction band energies of platinum nanoparticles derived from the absorption peaks increased with increasing dose and decreased with increasing particle size.
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Affiliation(s)
- Elham Gharibshahi
- Department of Physics, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
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29
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Long NV, Thi CM, Nogami M, Ohtaki M. Novel issues of morphology, size, and structure of Pt nanoparticles in chemical engineering: surface attachment, aggregation or agglomeration, assembly, and structural changes. NEW J CHEM 2012. [DOI: 10.1039/c2nj40027h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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