1
|
Denchy MA, Wang L, Bilik BR, Hansen L, Albornoz S, Lizano F, Blando N, Hicks Z, Gantefoer G, Bowen KH. Ultrasmall Cluster Model for Investigating Single Atom Catalysis: Dehydrogenation of 1-Propanamine by Size-Selected Pt 1Zr 2O 7 Clusters Supported on HOPG. J Phys Chem A 2022; 126:7578-7590. [PMID: 36257817 DOI: 10.1021/acs.jpca.2c03149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The selective dehydrogenation of hydrocarbons and their functionalized derivatives is a promising pathway in the realization of endothermic fuel systems for powering important technologies such as hypersonic aircraft. The recent surge in interest in single atom catalysts (SACs) over the past decade offers the opportunity to achieve the ultimate levels of selectivity through the subnanoscale design tailoring of novel catalysts. Experimental techniques capable of investigating the fundamental nature of the active sites of novel SACs in well-controlled model studies offer the chance to reveal promising insights. We report here an approach to accomplish this through the soft landing of mass-selected, ultrasmall metal oxide cluster ions, in which a single noble metal atom bound to a metal oxide moiety serves as a model SAC active site. This method allows the preparation of model catalysts in which monodispersed neutral SAC model active sites are decorated across an inert electrically conductive support at submonolayer surface coverage, in this case, Pt1Zr2O7 clusters supported on highly oriented pyrolytic graphite (HOPG). The results contained herein show the characterization of the Pt1Zr2O7/HOPG model catalyst by X-ray photoelectron spectroscopy (XPS), along with an investigation of its reactivity toward the functionalized hydrocarbon molecule, 1-propanamine. Through temperature-programmed desorption/reaction (TPD/R) experiments it was shown that Pt1Zr2O7/HOPG decomposes 1-propanamine exclusively into propionitrile and H2, which desorb at 425 and 550 K, respectively. Conversely, clusters without the single platinum atom, that is, Zr2O7/HOPG, exhibited no reactivity toward 1-propanamine. Hence, the single platinum atom in Pt1Zr2O7/HOPG was found to play a critical role in the observed reactivity.
Collapse
Affiliation(s)
- Michael A Denchy
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Linjie Wang
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Benjamin R Bilik
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Lucas Hansen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Sandra Albornoz
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Francisco Lizano
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Nicolas Blando
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Zachary Hicks
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Gerd Gantefoer
- Fachbereich fuer Physik, Universitaet Konstanz, 78457 Konstanz, Germany
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| |
Collapse
|
2
|
Yang B, Qin T, Bao Z, Lu W, Dong J, Bin D, Lu H. Synthesis of SDS-Modified Pt/Ti 3C 2T x Nanocomposite Catalysts and Electrochemical Performance for Ethanol Oxidation. NANOMATERIALS 2021; 11:nano11123174. [PMID: 34947522 PMCID: PMC8703315 DOI: 10.3390/nano11123174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/12/2021] [Accepted: 11/22/2021] [Indexed: 11/16/2022]
Abstract
It is well-known that platinum (Pt) is still the preferred material of anode catalyst in ethanol oxidation, however, the prohibitive high cost and CO poisoning of Pt metal impede the commercialization of fuel cells. Therefore, improving the utilization rate of catalysts and reduce the cost of catalyst become one of the most concerned focus in the construction of fuel cells. In this work, the Pt-based catalysts are synthesized by using different content of sodium dodecyl sulfate (SDS) modified-Ti3C2Tx support, and the dispersion regulation function of SDS modified-Ti3C2Tx supported on Pt nanoparticles is investigated. The structure, composition and morphology of different catalysts are characterized by X-ray diffraction (XRD), X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and high-resolution TEM, respectively. It is found that the Pt nanoparticles in pure Ti3C2Tx surface are serious aggregated and show poor dispersion, whereas the Pt nanoparticles in SDS modified-Ti3C2Tx have a better dispersion. The electrochemical results revealed that SDS modified-Ti3C2Tx supported Pt nanoparticles has higher electrocatalytic activity and stability in both acidic and alkaline ethanol oxidation when the dosage of SDS increases to 100 mg. These findings indicate that the SDS-Ti3C2Tx/Pt catalysts show a promising future of potential applications in fuel cells with modification of Ti3C2Tx support.
Collapse
Affiliation(s)
- Beibei Yang
- Department of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China; (B.Y.); (T.Q.); (Z.B.); (W.L.)
| | - Tian Qin
- Department of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China; (B.Y.); (T.Q.); (Z.B.); (W.L.)
| | - Ziping Bao
- Department of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China; (B.Y.); (T.Q.); (Z.B.); (W.L.)
| | - Wenqian Lu
- Department of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China; (B.Y.); (T.Q.); (Z.B.); (W.L.)
| | - Jiayu Dong
- Institute of Materials Engineering, National Laboratory of Solid State Microstructures, College of Engineering and Applied Science, Nanjing University, Nanjing 210093, China;
| | - Duan Bin
- Department of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China; (B.Y.); (T.Q.); (Z.B.); (W.L.)
- Correspondence: (D.B.); (H.L.)
| | - Hongbin Lu
- Department of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China; (B.Y.); (T.Q.); (Z.B.); (W.L.)
- Correspondence: (D.B.); (H.L.)
| |
Collapse
|
3
|
You X, Zhang G, Chen Y, Liu D, Ma D, Zhou J, Liu Y, Liu H, Qi Y, Liang C, Ding P, Zhu X, Zhang C, Wang A. A novel electrochemical immunosensor for the sensitive detection of tiamulin based on staphylococcal protein A and silver nanoparticle-graphene oxide nanocomposites. Bioelectrochemistry 2021; 141:107877. [PMID: 34171508 DOI: 10.1016/j.bioelechem.2021.107877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/29/2021] [Accepted: 06/13/2021] [Indexed: 12/17/2022]
Abstract
Tiamulin (TML) is a pleuromutilin antibiotic and mainly used to treat pulmonary and gastrointestinal infections. However, excessive use of TML can bring health threats to consumers. In this work, a label-free electrochemical immunosensor was proposed for sensitive detection of TML in pork and pork liver. Silver nanoparticles (AgNPs) were synthesized in situ on graphene oxide (GO), in which GO acted as a carrier for loading more AgNPs and AgNPs exhibited both strong conductivity and good redox property. In addition, staphylococcal protein A (SPA) was applied to oriented immobilization of fragment crystallizable (Fc) region of the TML monoclonal antibody. Under the optimal condition, the developed electrochemical immunosensor exhibited a good linear response with a concentration of TML ranging from 0.05 ng mL-1 to 100 ng mL-1 and the limit of detection (LOD) was 0.04 ng mL-1. Furthermore, the designed immunosensor was applied to detect TML in real samples with a good accuracy. Therefore, the label-free electrochemical immunosensor could be used as a potential method to detect TML and other antibiotic residues in animal derived foods.
Collapse
Affiliation(s)
- Xiaojuan You
- School of Life Sciences, Zhengzhou University, Zhengzhou, China; Henan Zhongze Biological Engineering Co. LTD, Zhengzhou, China
| | - Gaiping Zhang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Yumei Chen
- School of Life Sciences, Zhengzhou University, Zhengzhou, China; Henan Zhongze Biological Engineering Co. LTD, Zhengzhou, China
| | - Dan Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Dongdong Ma
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Jingming Zhou
- School of Life Sciences, Zhengzhou University, Zhengzhou, China; Henan Zhongze Biological Engineering Co. LTD, Zhengzhou, China
| | - Yankai Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Hongliang Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Yanhua Qi
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Chao Liang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Peiyang Ding
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Xifang Zhu
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Chenyang Zhang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Aiping Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China; Henan Zhongze Biological Engineering Co. LTD, Zhengzhou, China.
| |
Collapse
|
4
|
Vu THT, Nguyen TT, Nguyen TH, Nguyen MD, Nguyen QM. A new method for synthesizing high performance few-layer graphene supported Pt electrocatalysts in methanol and ethanol oxidation. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138258] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
5
|
Das SK, Mohanty B, Sahu SC, J ST, Chakraborty B, Basu S, Jena BK. The experimental and theoretical insights on the interaction of AuPd bimetallic nanoentities on graphene: A study on electrocatalytic activity towards oxygen reduction reaction. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136820] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
6
|
Li N, Yuan Y, Liu J, Hou S. Direct chemical vapor deposition of graphene on plasma-etched quartz glass combined with Pt nanoparticles as an independent transparent electrode for non-enzymatic sensing of hydrogen peroxide. RSC Adv 2020; 10:20438-20444. [PMID: 35517744 PMCID: PMC9054246 DOI: 10.1039/d0ra01963a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/20/2020] [Indexed: 11/30/2022] Open
Abstract
In this work, chemical vapor deposition (CVD) method-grown graphene on plasma-etched quartz glass supported platinum nanoparticles (PtNPs/eQG) was constructed as an independent transparent electrode for non-enzymatic hydrogen peroxide (H2O2) detection. Graphene grown on quartz glass by the CVD method can effectively reduce the wrinkles and pollution caused by traditional transfer methods. The addition of the CF4 plasma-etched process accelerates the growth rate of graphene on quartz glass. The platinum nanoparticles (PtNPs) prepared by in situ sputtering have favorable dispersibility and maximize exposed active catalytic sites on graphene, providing performance advantages in the application of H2O2 detection. The resulting sensor's detection limit (3.3 nM, S/N = 3), detection linear range (10 nM to 80 μM) and response time (less than 2 s) were significantly superior to other graphene supported PtNPs materials in sensing of H2O2. In addition, the material preparation method was related to the non-transfer CVD method and in situ sputtering technology, allowing for the creation of independent electrodes without additional electrode modification processes. This primitive material preparation and electrode assembly process were promoted for the application and development of practical H2O2 sensors. In this work, chemical vapor deposition (CVD) method-grown graphene on plasma-etched quartz glass supported platinum nanoparticles (PtNPs/eQG) was constructed as an independent transparent electrode for non-enzymatic hydrogen peroxide (H2O2) detection.![]()
Collapse
Affiliation(s)
- Ning Li
- School of Chemistry and Chemical Engineering, Shandong University Jinan Shandong 250100 China.,National Engineering and Technology Research Center for Colloidal Materials, Shandong University Jinan Shandong 250100 China
| | - Yawen Yuan
- School of Chemistry and Chemical Engineering, Shandong University Jinan Shandong 250100 China.,Institute 53 of China North Industries Group Corporation Jinan Shandong 250031 China
| | - Jinglei Liu
- National Engineering and Technology Research Center for Colloidal Materials, Shandong University Jinan Shandong 250100 China
| | - Shifeng Hou
- National Engineering and Technology Research Center for Colloidal Materials, Shandong University Jinan Shandong 250100 China
| |
Collapse
|
7
|
Synergistic effect of β-Bi2O3 and graphene/MWCNT in silicone-based polymeric matrices on diagnostic X-ray attenuation. APPLIED NANOSCIENCE 2019. [DOI: 10.1007/s13204-019-00972-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
8
|
Farajian AA, Mortezaee R, Osborn TH, Pupysheva OV, Wang M, Zhamu A, Jang BZ. Multiscale molecular thermodynamics of graphene-oxide liquid-phase exfoliation. Phys Chem Chem Phys 2019; 21:1761-1772. [PMID: 30623952 DOI: 10.1039/c8cp07115b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Liquid-phase exfoliation is one of the most feasible methods for mass-production of two-dimensional (2D) nanomaterials such as graphene, graphene-oxide (GO), etc. Assessing requirements for successful exfoliation necessitates molecular-level thermodynamic analysis that can provide quantitative measures such as free energy changes. Here we explain this methodology and apply it to the production of GO that is used as a precursor for graphene synthesis and as an ultrathin substrate for many applications. Three different routes to GO exfoliation are studied, namely parallel and perpendicular to the GO surface as well as exfoliation via edge bending, using multi-scale combination of density functional, force field, and continuum approaches. Detailed analysis of free energy variations reveals relative feasibility of different exfoliation mechanisms and their dependence on system size and surface coverage. The methodology is general and can be applied to liquid-phase exfoliation of other 2D nanomaterials.
Collapse
Affiliation(s)
- Amir A Farajian
- Department of Mechanical and Materials Engineering, Wright State University, 3640 Colonel Glenn Highway, Dayton, Ohio 45435, USA.
| | | | | | | | | | | | | |
Collapse
|
9
|
Itoi H, Tachikawa T, Suzuki R, Hasegawa H, Iwata H, Ohzawa Y, Beniya A, Higashi S. A dry chemical method for dispersing Ir nanoparticles in the pores of activated carbon and their X-ray absorption spectroscopy analysis. NEW J CHEM 2019. [DOI: 10.1039/c9nj04659c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Ir nanoparticles are finely dispersed inside the pores of activated carbon (AC) via the gas phase adsorption of an organoiridium complex in the AC and subsequent heat treatment. X-ray absorption spectroscopy reveals the structure of the supported Ir.
Collapse
Affiliation(s)
- Hiroyuki Itoi
- Department of Applied Chemistry
- Aichi Institute of Technology
- Toyota 470-0392
- Japan
| | | | - Ryutaro Suzuki
- Department of Applied Chemistry
- Aichi Institute of Technology
- Toyota 470-0392
- Japan
| | - Hideyuki Hasegawa
- Department of Applied Chemistry
- Aichi Institute of Technology
- Toyota 470-0392
- Japan
| | - Hiroyuki Iwata
- Department of Electrical and Electronics Engineering
- Aichi Institute of Technology
- Toyota 470-0392
- Japan
| | - Yoshimi Ohzawa
- Department of Applied Chemistry
- Aichi Institute of Technology
- Toyota 470-0392
- Japan
| | - Atsushi Beniya
- Frontier Research-Domain
- Toyota Central R&D Labs
- Inc
- Nagakute
- Japan
| | - Shougo Higashi
- Frontier Research-Domain
- Toyota Central R&D Labs
- Inc
- Nagakute
- Japan
| |
Collapse
|
10
|
Wang Z, Zhang F, Zou H, Yuan Y, Wang H, Xia J, Wang Z. Preparation of a Pt/NiFe layered double hydroxide/reduced graphene oxide composite as an electrocatalyst for methanol oxidation. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.04.046] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
11
|
Fu P, Xiao Z, Liu Y, Wang L, Zhang X, Li G. Support-Independent Surface Functionalization for Efficient Pd Loading in Catalytic Hydrogenation. ChemistrySelect 2018. [DOI: 10.1002/slct.201800106] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Peng Fu
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Zhourong Xiao
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Yanhong Liu
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Li Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Xiangwen Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Guozhu Li
- Key Laboratory for Green Chemical Technology of Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| |
Collapse
|
12
|
Tomiyasu H, Shikata H, Takao K, Asanuma N, Taruta S, Park YY. An aqueous electrolyte of the widest potential window and its superior capability for capacitors. Sci Rep 2017; 7:45048. [PMID: 28322349 PMCID: PMC5359556 DOI: 10.1038/srep45048] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 02/20/2017] [Indexed: 12/24/2022] Open
Abstract
A saturated aqueous solution of sodium perchlorate (SSPAS) was found to be electrochemically superior, because the potential window is remarkably wide to be approximately 3.2 V in terms of a cyclic voltammetry. Such a wide potential window has never been reported in any aqueous solutions, and this finding would be of historical significance for aqueous electrolyte to overcome its weak point that the potential window is narrow. In proof of this fact, the capability of SSPAS was examined for the electrolyte of capacitors. Galvanostatic charge-discharge measurements showed that a graphite-based capacitor containing SSPAS as an electrolyte was stable within 5% deviation for the 10,000 times repetition at the operating voltage of 3.2 V without generating any gas. The SSPAS worked also as a functional electrolyte in the presence of an activated carbon and metal oxides in order to increase an energy density. Indeed, in an asymmetric capacitor containing MnO2 and Fe3O4 mixtures in the positive and negative electrodes, respectively, the energy density enlarged to be 36.3 Whkg−1, which belongs to the largest value in capacitors. Similar electrochemical behaviour was also confirmed in saturated aqueous solutions of other alkali and alkaline earth metal perchlorate salts.
Collapse
Affiliation(s)
- Hiroshi Tomiyasu
- Qualtec Co. Ltd., 4-230 Sambo-cho, Sakai, Osaka, 590-0906, Japan.,Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Hirokazu Shikata
- Qualtec Co. Ltd., 4-230 Sambo-cho, Sakai, Osaka, 590-0906, Japan
| | - Koichiro Takao
- Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology O-okayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Noriko Asanuma
- School of Engineering, Tokai University, Kitakaname, Hiratsuka 259-1292, Japan
| | - Seiichi Taruta
- Faculty of Engineering, Shinshu University, 4-17-1, Wakasato 380-8553, Japan
| | - Yoon-Yul Park
- Qualtec Co. Ltd., 4-230 Sambo-cho, Sakai, Osaka, 590-0906, Japan
| |
Collapse
|
13
|
Saeed K, Khan I, Sadiq M. Synthesis of graphene-supported bimetallic nanoparticles for the sunlight photodegradation of Basic Green 5 dye in aqueous medium. SEP SCI TECHNOL 2016. [DOI: 10.1080/01496395.2016.1154872] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Khalid Saeed
- Department of Chemistry, University of Malakand, Dir (L), Khyber Pakhtunkhwa, Pakistan
| | - Idrees Khan
- Department of Chemistry, University of Malakand, Dir (L), Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Sadiq
- Department of Chemistry, University of Malakand, Dir (L), Khyber Pakhtunkhwa, Pakistan
| |
Collapse
|
14
|
Sahu SC, Behera TK, Dash A, Jena B, Ghosh A, Jena BK. Highly porous Pd nanostructures and reduced graphene hybrids: excellent electrocatalytic activity towards hydrogen peroxide. NEW J CHEM 2016. [DOI: 10.1039/c5nj02555a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new approach has been developed for highly porous Pd nanostructure–graphene hybrids as efficient electrocatalysts towards reduction of H2O2.
Collapse
Affiliation(s)
- Subash Chandra Sahu
- Colloids and Materials Chemistry Department
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar
- India
| | - Tapan Kumar Behera
- Colloids and Materials Chemistry Department
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar
- India
| | - Ajit Dash
- Colloids and Materials Chemistry Department
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar
- India
| | | | | | - Bikash Kumar Jena
- Colloids and Materials Chemistry Department
- CSIR-Institute of Minerals and Materials Technology
- Bhubaneswar
- India
| |
Collapse
|
15
|
Zhou LN, Zhang XT, Shen WJ, Sun SG, Li YJ. Monolayer of close-packed Pt nanocrystals on a reduced graphene oxide (RGO) nanosheet and its enhanced catalytic performance towards methanol electrooxidation. RSC Adv 2015. [DOI: 10.1039/c5ra03007b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A close-packed monolayer composed of (111)-orientated Pt nanocrystals was fabricated on reduced graphene oxide, exhibiting excellent electrocatalytic activity and stability towards methanol oxidation, ~3 times better mass activity than the commercial Pt/C.
Collapse
Affiliation(s)
- Lin-Nan Zhou
- State Key Lab of Chemo/Biosensing and Chemometrics
- School of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Xiao-Ting Zhang
- State Key Lab of Chemo/Biosensing and Chemometrics
- School of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Wen-Jin Shen
- State Key Lab of Chemo/Biosensing and Chemometrics
- School of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| | - Shi-Gang Sun
- State Key Lab for Physical Chemistry of Solid Surfaces
- Department of Chemistry
- Xiamen University
- Xiamen 361005
- China
| | - Yong-Jun Li
- State Key Lab of Chemo/Biosensing and Chemometrics
- School of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- China
| |
Collapse
|
16
|
Wang RX, Fan JJ, Fan YJ, Zhong JP, Wang L, Sun SG, Shen XC. Platinum nanoparticles on porphyrin functionalized graphene nanosheets as a superior catalyst for methanol electrooxidation. NANOSCALE 2014; 6:14999-15007. [PMID: 25363456 DOI: 10.1039/c4nr04140b] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel nanostructured catalyst of platinum nanoparticles supported on 5,10,15,20-tetrakis(1-methyl-4-pyridinio)porphyrin tetra(p-toluenesulfonate) (TMPyP) functionalized graphene (TMPyP-graphene) is synthesized by the hydrothermal polyol process. The as-synthesized nanocomposites are characterized by Fourier transform infrared (FTIR) spectroscopy, UV-vis absorption spectroscopy, Raman spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and electrochemical tests. It has been found that Pt nanoparticles of ca. 3.4 nm are uniformly dispersed on the surface of TMPyP-graphene, and hold a high electrochemical active surface area (ECSA) of 126.2 m(2) g(-1). The results demonstrate that the Pt/TMPyP-graphene catalyst exhibits a much higher electrocatalytic activity and stability than the Pt/graphene and commercial Pt/C catalysts for methanol oxidation, which is of significant importance in improving the efficiency of Pt-based electrocatalysts for DMFCs applications.
Collapse
Affiliation(s)
- Rui-Xiang Wang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China.
| | | | | | | | | | | | | |
Collapse
|
17
|
Roy I, Bhattacharyya A, Sarkar G, Saha NR, Rana D, Ghosh PP, Palit M, Das AR, Chattopadhyay D. In situ synthesis of a reduced graphene oxide/cuprous oxide nanocomposite: a reusable catalyst. RSC Adv 2014. [DOI: 10.1039/c4ra08127g] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
18
|
Chen L, Feng M, Zhan H. Fundamental electrochemistry of three-dimensional graphene aerogels. RSC Adv 2014. [DOI: 10.1039/c4ra04088k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
19
|
Bai P, Kao J, Chen JH, Mickelson W, Zettl A, Xu T. Nanostructures on graphene using supramolecule and supramolecular nanocomposites. NANOSCALE 2014; 6:4503-4507. [PMID: 24647721 DOI: 10.1039/c4nr00420e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanopatterning and functionalizing of graphene is often required to tune or enhance its unique physical properties. However, complex processes are needed to overcome the chemical incompatibilities between the patterning template, the functional small molecules or nanoparticles, and the underlying graphene. We present a block copolymer (BCP)-based supramolecular thin film as a versatile platform for the generation of periodic patterns of small molecules and ordered assemblies of nanoparticles on top of a graphene substrate without chemical modification of any components. The present approach opens opportunities to readily pattern and functionalize graphene, and to investigate the structure-property correlations of graphene/nanoparticle and graphene/small molecule composite materials.
Collapse
Affiliation(s)
- Peter Bai
- Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, USA.
| | | | | | | | | | | |
Collapse
|
20
|
Shape-controlled synthesis of Pt nanoparticles via integration of graphene and β-cyclodextrin and using as a noval electrocatalyst for methanol oxidation. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.12.174] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
21
|
Kumar SM, Ambalavanan S, Mayavan S. Effect of graphene and carbon nanotubes on the negative active materials of lead acid batteries operating under high-rate partial-state-of-charge operation. RSC Adv 2014. [DOI: 10.1039/c4ra06920j] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene and CNTs have different impacts on the structural and electrochemical properties of lead acid battery NAM under HRPSoC cycling.
Collapse
Affiliation(s)
- S. Mithin Kumar
- CSIR-Central Electrochemical Research Institute
- Karaikudi, India
| | - S. Ambalavanan
- CSIR-Central Electrochemical Research Institute
- Karaikudi, India
| | - Sundar Mayavan
- CSIR-Central Electrochemical Research Institute
- Karaikudi, India
| |
Collapse
|
22
|
Zhou C, Wang J, Szpunar JA. X-ray chemical imaging and the electronic structure of a single nanoplatelet Ni/graphene composite. Chem Commun (Camb) 2014; 50:2282-5. [DOI: 10.1039/c3cc47008c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Local chemistry and electronic structure of Ni/graphene composite reveal that Ni is grown onto graphene substrates mainlyviacovalent bonding of Ni–C and Ni–O–C.
Collapse
Affiliation(s)
- Chunyu Zhou
- Department of Mechanical Engineering
- University of Saskatchewan
- Saskatoon, Canada
| | - Jian Wang
- Canadian Light Source Inc
- Saskatoon, Canada
| | - Jerzy A. Szpunar
- Department of Mechanical Engineering
- University of Saskatchewan
- Saskatoon, Canada
| |
Collapse
|
23
|
Preparation and electrochemical performance of graphene–Pt black nanocomposite for electrochemical methanol oxidation. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2325-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
24
|
Sahu SC, Samantara AK, Satpati B, Bhattacharjee S, Jena BK. A facile approach for in situ synthesis of graphene-branched-Pt hybrid nanostructures with excellent electrochemical performance. NANOSCALE 2013; 5:11265-11274. [PMID: 24088741 DOI: 10.1039/c3nr03372d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A facile and green approach for the synthesis of highly electroactive branched Pt nanostructures well dispersed on graphene has been developed by in situ reduction of graphene oxides and Pt(iv) ions in an aqueous medium. The as-synthesized branched Pt and graphene hybrid nanomaterials (GR-BPtNs) were thoroughly characterized using Transmission Electron Microscope (TEM), UV-Visible spectroscopy, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and Raman spectroscopy. This report clearly exploits the decisive role of the graphene support, the pH of the solution and the stabiliser on shaping the branched morphology of the Pt nanostructures well dispersed on graphene. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy (EIS) measurements were employed to investigate the electrocatalytic performance and durability of GR-BPtNs towards methanol oxidation and oxygen reduction. The results reveal that the synergetic effect of the graphene support and the branched morphology triggers electrocatalytic performance and robust tolerance to surface poisoning of GR-BPtNs.
Collapse
Affiliation(s)
- Subash Chandra Sahu
- Colloids & Materials Chemistry, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar-751013, India.
| | | | | | | | | |
Collapse
|
25
|
Karthick R, Brindha M, Selvaraj M, Ramu S. Stable colloidal dispersion of functionalized reduced graphene oxide in aqueous medium for transparent conductive film. J Colloid Interface Sci 2013; 406:69-74. [DOI: 10.1016/j.jcis.2013.06.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/28/2013] [Accepted: 06/04/2013] [Indexed: 11/26/2022]
|
26
|
Gao L, Ding L, Fan L. Pt nanoflower/graphene-layered composites by ZnO nanoparticle expansion of graphite and their enhanced electrocatalytic activity for methanol oxidation. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.065] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
27
|
Cheng LC, Jiang X, Wang J, Chen C, Liu RS. Nano-bio effects: interaction of nanomaterials with cells. NANOSCALE 2013; 5:3547-69. [PMID: 23532468 DOI: 10.1039/c3nr34276j] [Citation(s) in RCA: 158] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
With the advancements in nanotechnology, studies on the synthesis, modification, application, and toxicology evaluation of nanomaterials are gaining increased attention. In particular, the applications of nanomaterials in biological systems are attracting considerable interest because of their unique, tunable, and versatile physicochemical properties. Artificially engineered nanomaterials can be well controlled for appropriate usage, and the tuned physicochemical properties directly influence the interactions between nanomaterials and cells. This review summarizes recently synthesized major nanomaterials that have potential biomedical applications. Focus is given on the interactions, including cellular uptake, intracellular trafficking, and toxic response, while changing the physicochemical properties of versatile materials. The importance of physicochemical properties such as the size, shape, and surface modifications of the nanomaterials in their biological effects is also highlighted in detail. The challenges of recent studies and future prospects are presented as well. This review benefits relatively new researchers in this area and gives them a systematic overview of nano-bio interaction, hopefully for further experimental design.
Collapse
Affiliation(s)
- Liang-Chien Cheng
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | | | | | | | | |
Collapse
|
28
|
Byeon JH, Kim YW. Gas-phase self-assembly of highly ordered titania@graphene nanoflakes for enhancement in photocatalytic activity. ACS APPLIED MATERIALS & INTERFACES 2013; 5:3959-3966. [PMID: 23557605 DOI: 10.1021/am400765z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The gas-phase self-assembly of reduced graphene oxide (rGO) nanoflakes with highly ordered ultrafine titania (TiO2) particles was performed and the resultant hybrid material displayed an enhanced photocatalytic performance, both in producing hydrogen and in degrading dyes. Freshly synthesized TiO2 nanoparticles (∼35 nm in equivalent mobility diameter) were quantitatively incorporated with nanoscale rGO (∼36 nm in equivalent mobility diameter) in the form of TiO2/rGO hybrid nanoflakes (∼31 nm in equivalent mobility diameter). The TiO2/rGO hybrid flakes were finally employed to evaluate its photocatalytic activity, and it was found that the ability to achieve hydrogen production and dye degradation was greater than that of a hybridized material from commercial p25-TiO2 and large rGO. This gas-phase self-assembly also enhanced the photocatalytic activity by applying different spark configurations to prepare ZnO, Au, or Ag particles incorporated with rGO nanoflakes.
Collapse
Affiliation(s)
- Jeong Hoon Byeon
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | | |
Collapse
|
29
|
Chekin F, Bagheri S, Abd Hamid SB. Synthesis of Pt doped TiO2 nanoparticles: Characterization and application for electrocatalytic oxidation of l-methionine. SENSORS AND ACTUATORS B: CHEMICAL 2013; 177:898-903. [DOI: 10.1016/j.snb.2012.12.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|