1
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Li Y, Gong X, Dutta Chowdhury A. Toward Developing Superior Cu-Based Metal-Organic Framework-Derived Materials for Electrocatalytic Oxidation of Ethanol. Inorg Chem 2024; 63:11258-11269. [PMID: 38830055 DOI: 10.1021/acs.inorgchem.4c01109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
This project addresses the urgent need for efficient and cost-effective development of electrocatalysts for the ethanol oxidation reaction (EOR). This reaction offers promising renewable energy solutions but faces challenges due to the slow EOR kinetics, typically requiring costly noble metal catalysts. To overcome these limitations, this study focuses on developing CuZn-based EOR catalysts derived from metal-organic frameworks (MOFs), focusing on understanding the structure-performance relationship between pristine MOF-based electrocatalysts and their pyrolyzed counterparts. Herein, bimetallic MOF materials with varying Cu/Zn ratios were synthesized, followed by pyrolysis to produce carbonized counterparts while preserving the fundamental structure but with altered physicochemical properties. Comparative EOR studies revealed the superior performance of pyrolyzed MOFs, demonstrating that optimized Zn-loading is crucial over Cu-based framework for catalyst performance and durability. Overall, this work highlights the potential of MOF-derived Cu-based catalysts for renewable energy applications and provides insights into optimizing their performance through controlled synthesis and post-treatment strategies.
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Affiliation(s)
- Yining Li
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China
| | - Xuan Gong
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China
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2
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Dhawale SC, Munde AV, Mulik BB, Dighole RP, Zade SS, Sathe BR. CTAB-Assisted Synthesis of FeNi Alloy Nanoparticles: Effective and Stable Electrocatalysts for Urea Oxidation Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:2672-2685. [PMID: 38265983 DOI: 10.1021/acs.langmuir.3c03205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2024]
Abstract
Development of highly efficient electrocatalysts for treating urea-rich wastewater is an important problem in environmental management and energy production. In this work, an iron-nickel alloy (Fe-Ni alloy) was synthesized via soft-template cetyltrimethylammonium bromide (CTAB)-assisted precipitation using low-temperature calcination. The as-synthesized nanoalloy was characterized by X-ray diffraction (XRD), which revealed the formation of a face-centered cubic (FCC) structure of the Fe-Ni alloy; field emission-scanning electron microscopic (FE-SEM) analysis revealed the spherical shape of the Fe-Ni alloy; high-resolution transmission electron microscopy (HR-TEM) revealed the average size to be ∼33.09 nm; and X-ray photoelectron spectroscopy (XPS) showed the presence of Fe, Ni, C, and O components and their chemical composition and valence states in the Fe-Ni alloy. The electrochemical urea oxidation reaction (UOR) was investigated by conducting linear sweep voltammetry (LSV) tests on the synthesized electrocatalysts with different Ni/Fe ratios in alkaline electrolytes with urea. The potential required to reach a current density of 10 mA cm-2 is 1.27 V vs RHE, which demonstrates the higher electrochemical activity of the Fe-Ni alloy compared to other individual compounds. This could be due to CTAB which improved the structural stability and synergetic and electronic effects in the nanoscale. This study will further contribute to renewable energy generation technology with long-term energy sustainability and also opens up great potential for reducing water pollution.
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Affiliation(s)
- Somnath C Dhawale
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Chhatrapati Sambhajinagar 431004, Maharashtra, India
| | - Ajay V Munde
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Chhatrapati Sambhajinagar 431004, Maharashtra, India
- Indian Institute of Science Education and Research (IISER), Kolkata 741246, West Bengal, India
| | - Balaji B Mulik
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Chhatrapati Sambhajinagar 431004, Maharashtra, India
- MGM University, Chhatrapati Sambhajinagar 431001, Maharashtra, India
| | - Raviraj P Dighole
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Chhatrapati Sambhajinagar 431004, Maharashtra, India
- Arts, Science & Commerce College, Badnapur, Jalna 431202, India
| | - Sanjio S Zade
- Indian Institute of Science Education and Research (IISER), Kolkata 741246, West Bengal, India
| | - Bhaskar R Sathe
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University, Chhatrapati Sambhajinagar 431004, Maharashtra, India
- Department of Nanotechnology, Dr. Babasaheb Ambedkar Marathwada University, Chhatrapati Sambhajinagar 431004, Maharashtra, India
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3
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Jiao C, Cao Z, He J, Liu Z, Zheng C, Peng S, Chen B. Co@Co Cages Engineered from Hollowing MOFs for Enhanced Hydrogen Evolution Reaction Performance. J Phys Chem Lett 2023:5447-5455. [PMID: 37285220 DOI: 10.1021/acs.jpclett.3c01287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Advances in hollow engineering of metal-organic frameworks (MOFs) have enabled a variety of applications in catalysts, sensors, and batteries, but the hollow derivatives are often limited to hydroxides, oxides, selenides, and sulfides with the presence of additional elements from the environment. Here we have successfully synthesized hollow metallic Co@Co cages through a facile two-step strategy. Interestingly, the Co@Co(C) cages with a small amount of residual carbon show excellent catalytic performance due to the abundant exposed active sites and fast charge transfer. During the hydrogen evolution reaction, the overpotential of Co@Co(C) is as low as ∼54 mV at the current density of 10 mA cm-2, which is close to that of ∼38 mV for the Pt/C electrodes. The two-step synthesis strategy opens up opportunities for increasing the number of catalytic active sites and rates of charge/mass transfer while pushing the limits of materials utilization beyond that achieved in existing MOF-based nanostructures.
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Affiliation(s)
- Chuangwei Jiao
- Center for Ultrafast Science and Technology, School of Chemistry and Chemical Engineering, and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zetan Cao
- Center for Ultrafast Science and Technology, School of Chemistry and Chemical Engineering, and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jia He
- Center for Ultrafast Science and Technology, School of Chemistry and Chemical Engineering, and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhiwen Liu
- Center for Ultrafast Science and Technology, School of Chemistry and Chemical Engineering, and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Cheng Zheng
- Center for Ultrafast Science and Technology, School of Chemistry and Chemical Engineering, and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Simin Peng
- Center for Ultrafast Science and Technology, School of Chemistry and Chemical Engineering, and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Bin Chen
- Center for Ultrafast Science and Technology, School of Chemistry and Chemical Engineering, and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
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Abdel-Aty MM, Gomaa HE, Abdu HM, Almasri RA, Irfan OM, Barakat NAM. Molybdenum Carbide/Ni Nanoparticles Embedded into Carbon Nanofibers as an Effective Non-Precious Catalyst for Green Hydrogen Production from Methanol Electrooxidation. Polymers (Basel) 2023; 15:polym15112430. [PMID: 37299229 DOI: 10.3390/polym15112430] [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: 03/04/2023] [Revised: 05/01/2023] [Accepted: 05/05/2023] [Indexed: 06/12/2023] Open
Abstract
Molybdenum carbide co-catalyst and carbon nanofiber matrix are suggested to improve the nickel activity toward methanol electrooxidation process. The proposed electrocatalyst has been synthesized by calcination electrospun nanofiber mats composed of molybdenum chloride, nickel acetate, and poly (vinyl alcohol) under vacuum at elevated temperatures. The fabricated catalyst has been characterized using XRD, SEM, and TEM analysis. The electrochemical measurements demonstrated that the fabricated composite acquired specific activity for methanol electrooxidation when molybdenum content and calcination temperature were tuned. In terms of the current density, the highest performance is attributed to the nanofibers obtained from electrospun solution having 5% molybdenum precursor compared to nickel acetate as a current density of 107 mA/cm2 was generated. The process operating parameters have been optimized and expressed mathematically using the Taguchi robust design method. Experimental design has been employed in investigating the key operating parameters of methanol electrooxidation reaction to obtain the highest oxidation current density peak. The main effective operating parameters of the methanol oxidation reaction are Mo content in the electrocatalyst, methanol concentration, and reaction temperature. Employing Taguchi's robust design helped to capture the optimum conditions yielding the maximum current density. The calculations revealed that the optimum parameters are as follows: Mo content, 5 wt.%; methanol concentration, 2.65 M; and reaction temperature, 50 °C. A mathematical model has been statistically derived to describe the experimental data adequately with an R2 value of 0. 979. The optimization process indicated that the maximum current density can be identified statistically at 5% Mo, 2.0 M methanol concentration, and 45 °C operating temperature.
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Affiliation(s)
- Marwa M Abdel-Aty
- Chemical Engineering Department, Faculty of Engineering, Minia University, Minia 61519, Egypt
| | - Hassan E Gomaa
- Department of Chemistry, College of Science and Humanities, Ad-Dawadmi, Shaqra University, Sahqra 11911, Saudi Arabia
- Department of Nuclear Safety Engineering, Nuclear Installations Safety Division, Atomic Energy Authority, Cairo 11765, Egypt
| | - Hany Mohamed Abdu
- Production Engineering & Design Department, Faculty of Engineering, Minia University, Minya 61516, Egypt
| | - Radwan A Almasri
- Department of Mechanical Engineering, College of Engineering, Qassim University, Buraydah 51452, Saudi Arabia
| | - Osama M Irfan
- Department of Mechanical Engineering, College of Engineering, Qassim University, Buraydah 51452, Saudi Arabia
- Department of Production Engineering, Beni Suef University, Beni Suef 62521, Egypt
| | - Nasser A M Barakat
- Chemical Engineering Department, Faculty of Engineering, Minia University, Minia 61519, Egypt
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Thamer BM, Abdul Hameed MM, El-Newehy MH. Molten Salts Approach of Poly(vinyl alcohol)-Derived Bimetallic Nickel-Iron Sheets Supported on Porous Carbon Nanosheet as an Effective and Durable Electrocatalyst for Methanol Oxidation. Gels 2023; 9:gels9030238. [PMID: 36975687 PMCID: PMC10048021 DOI: 10.3390/gels9030238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/11/2023] [Accepted: 03/14/2023] [Indexed: 03/29/2023] Open
Abstract
The preparation of metallic nanostructures supported on porous carbon materials that are facile, green, efficient, and low-cost is desirable to reduce the cost of electrocatalysts, as well as reduce environmental pollutants. In this study, a series of bimetallic nickel-iron sheets supported on porous carbon nanosheet (NiFe@PCNs) electrocatalysts were synthesized by molten salt synthesis without using any organic solvent or surfactant through controlled metal precursors. The as-prepared NiFe@PCNs were characterized by scanning and transmission electron microscopy (SEM and TEM), X-ray diffraction, and photoelectron spectroscopy (XRD and XPS). The TEM results indicated the growth of NiFe sheets on porous carbon nanosheets. The XRD analysis confirmed that the Ni1-xFex alloy had a face-centered polycrystalline (fcc) structure with particle sizes ranging from 15.5 to 30.6 nm. The electrochemical tests showed that the catalytic activity and stability were highly dependent on the iron content. The electrocatalytic activity of catalysts for methanol oxidation demonstrated a nonlinear relationship with the iron ratio. The catalyst doped with 10% iron showed a higher activity compared to the pure nickel catalyst. The maximum current density of Ni0.9Fe0.1@PCNs (Ni/Fe ratio 9:1) was 190 mA/cm2 at 1.0 M of methanol. In addition to the high electroactivity, the Ni0.9Fe0.1@PCNs showed great improvement in stability over 1000 s at 0.5 V with a retained activity of 97%. This method can be used to prepare various bimetallic sheets supported on porous carbon nanosheet electrocatalysts.
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Affiliation(s)
- Badr M Thamer
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | | | - Mohamed H El-Newehy
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
- Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt
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6
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M. Khalaf M, M. Abd El-Lateef H, Dao VD, Mohamed IMA. Electrocatalysis of Methanol Oxidation in Alkaline Electrolytes over Novel Amorphous Fe/Ni Biphosphate Material Prepared by Different Techniques. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3429. [PMID: 36234558 PMCID: PMC9565568 DOI: 10.3390/nano12193429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/25/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
In this work, novel phosphate materials based on bimetallic character (Fe and Ni) were introduced by different chemical fabrication methods, the reflux method (FeNiP-R) and the sol-gel technique (FeNiP-S), and evaluated as non-precious electrodes for methanol electrooxidation in KOH electrolytes. The designed FeNiP-R and FeNiP-S samples were investigated using different characterization techniques, namely TEM, SEM, XPS, BET, DLS, and FT-IR, to describe the impact of the fabrication technique on the chemistry, morphology, and surface area. The characterization techniques indicate the successful fabrication of nanoscale-sized particles with higher agglomeration by the sol-gel technique compared with the reflux strategy. After that, the electrochemical efficiency of the fabricated FeNiP-R and FeNiP-S as electrodes for electrocatalytic methanol oxidation was studied through cyclic voltammetry (CV) at different methanol concentrations and scan rates in addition to impedance analysis and chronoamperometric techniques. From electrochemical analyses, a sharp improvement in the obtained current values was observed in both electrodes, FeNiP-R and FeNiP-S. During the MeOH electrooxidation over FeNiP-S, the current value was improved from 0.14 mA/cm2 at 0.402 V to 2.67 mA/cm2 at 0.619 V, which is around 109 times the current density value (0.0243 mA/cm2 at 0.62 V) found in the absence of MeOH. The designed FeNiP-R electrode showed an improved electrocatalytic character compared with FeNiP-S at different methanol concentrations up to 80 mmol/L. The enhancement of the anodic current density and charge transfer resistance indicates the methanol electrooxidation over the designed bimetallic Fe/Ni-phosphates.
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Affiliation(s)
- Mai M. Khalaf
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Department of Chemistry, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Hany M. Abd El-Lateef
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Department of Chemistry, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Van-Duong Dao
- Faculty of Biotechnology, Chemistry and Environmental Engineering, Phenikaa University, Hanoi 10000, Vietnam
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7
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Yao R, Pinals J, Dorakhan R, Herrera JE, Zhang M, Deshlahra P, Chin YHC. Cobalt-Molybdenum Oxides for Effective Coupling of Ethane Activation and Carbon Dioxide Reduction Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rui Yao
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
- Key Laboratory of Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China
- Postdoctoral Programme Office, Guosen Securities Co., Ltd., Shenzhen 518001, China
| | - Jayson Pinals
- Department of Chemical and Biological Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Roham Dorakhan
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
| | - José E. Herrera
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario N6A 5B9, Canada
| | - Minhua Zhang
- Key Laboratory of Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China
| | - Prashant Deshlahra
- Department of Chemical and Biological Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Ya-Huei Cathy Chin
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
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8
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Insights into synergistic utilization of residual of ternary layered double hydroxide after oxytetracycline as a potential catalyst for methanol electrooxidation. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.09.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Preparation of NiCuGO composite and investigation of its electrocatalytic properties in methanol oxidation. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Barakat NAM, Ahmed E, Farghali AA, Nassar MM, Tolba GMK, Zaki AH. Ni‐Decorated Multi‐Walled Carbon Nanotubes for Electro‐Oxidation of Tri(ammonium) Phosphate as New Hydrogen Source Material. ChemistrySelect 2022. [DOI: 10.1002/slct.202200318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Nasser A. M. Barakat
- Chemical Engineering Department Faculty of Engineering Minia University El-Minia Egypt
| | - Enas Ahmed
- Renewable Energy Science and Engineering Department Faculty of Postgraduate Studies for Advanced Sciences Beni-Suef University Egypt
| | - Ahmed Ali Farghali
- Materials Science and Nanotechnology Department Faculty of Postgraduate Studies for Advanced Sciences Beni-Suef University Egypt
| | - Mamdouh M. Nassar
- Chemical Engineering Department Faculty of Engineering Minia University El-Minia Egypt
| | - Gehan M. K. Tolba
- Chemical Engineering Department Faculty of Engineering Minia University El-Minia Egypt
| | - Ayman H. Zaki
- Materials Science and Nanotechnology Department Faculty of Postgraduate Studies for Advanced Sciences Beni-Suef University Egypt
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11
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Altunbaş Şahin E. The use of avocado seed self‐assembly monolayer films for the catalysis of methanol electrooxidation reaction. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ece Altunbaş Şahin
- Property Protection and Security Department Bingol University, Genç Vocational School, Civil Defense and Firefighting Program Bingol Turkey
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12
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PBI nanofiber mat-reinforced anion exchange membranes with covalently linked interfaces for use in water electrolysers. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol. CRYSTALS 2021. [DOI: 10.3390/cryst11111398] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Methanol electrochemical oxidation in a direct methanol fuel cell (DMFC) is considered to be an efficient pathway for generating renewable energy with low pollutant emissions. NiO−CuO and Ni0.95Cr0.05O2+δ thin films were synthesized using a simple dip-coating method and tested for the electro-oxidation of methanol. These synthesized electrocatalysts were characterized by X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and Raman spectroscopy. Different electrochemical techniques were used to investigate the catalytic activity of these prepared electrocatalysts for methanol oxidation, including linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). In the presence of 0.3 M methanol, the current densities of NiO−CuO and Ni0.95Cr0.05O2+δ thin films were found to be 12.2 mA·cm−2 and 6.5 mA·cm−2, respectively. The enhanced catalytic activity of NiO−CuO and Ni0.95Cr0.05O2+δ thin films may be a result of the synergistic effect between different metal oxides. The Chronoamperometry (CA) results of the mixed metal oxide thin films confirmed their stability in basic media. Furthermore, the findings of electrochemical impedance spectroscopy (EIS) of mixed metal oxide thin films demonstrated a lower charge transfer resistance as compared to the pure NiO, CuO, and Cr2O3 thin films.
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14
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Kumaravel S, Subramanian M, Karthick K, Sakthivel A, Kundu S, Alwarappan S. DNA-Modified Cobalt Tungsten Oxide Hydroxide Hydrate Nanochains as an Effective Electrocatalyst with Amplified CO Tolerance during Methanol Oxidation. ACS OMEGA 2021; 6:19162-19169. [PMID: 34337254 PMCID: PMC8320070 DOI: 10.1021/acsomega.1c02515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 06/24/2021] [Indexed: 05/05/2023]
Abstract
Direct methanol fuel cell technology implementation mainly depends on the development of non-platinum catalysts with good CO tolerance. Among the widely studied transition-metal catalysts, cobalt oxide with distinctively higher catalytic efficiency is highly desirable. Here, we have evolved a simple method of synthesizing cobalt tungsten oxide hydroxide hydrate nanowires with DNA (CTOOH/DNA) and without incorporating DNA (CTOOH) by microwave irradiation and subsequently employed them as electrocatalysts for methanol oxidation. Following this, we examined the influence of incorporating DNA into CTOOH by cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. The enhanced electrochemical surface area of CTOOH offered readily available electroactive sites and resulted in a higher oxidation current at a lower onset potential for methanol oxidation. On the other hand, CTOOH/DNA exhibited improved CO tolerance and it was evident from the chronoamperometric studies. Herein, we noticed only a 2.5 and 1.8% drop at CTOOH- and CTOOH/DNA-modified electrodes, respectively, after 30 min. Overall, from the results, it was evident that the presence of DNA in CTOOH played an important role in the rapid removal of adsorbed intermediates and regenerated active catalyst centers possibly by creating high density surface defects around the nanochains than bare CTOOH.
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Affiliation(s)
- Sangeetha Kumaravel
- CSIR-Central
Electrochemical Research Institute, Karaikudi, Tamilnadu 630003, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Postal Staff College Area, Sector
19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201002, India
| | | | - Kannimuthu Karthick
- CSIR-Central
Electrochemical Research Institute, Karaikudi, Tamilnadu 630003, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Postal Staff College Area, Sector
19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201002, India
| | - Arunkumar Sakthivel
- CSIR-Central
Electrochemical Research Institute, Karaikudi, Tamilnadu 630003, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Postal Staff College Area, Sector
19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201002, India
| | - Subrata Kundu
- CSIR-Central
Electrochemical Research Institute, Karaikudi, Tamilnadu 630003, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Postal Staff College Area, Sector
19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201002, India
| | - Subbiah Alwarappan
- CSIR-Central
Electrochemical Research Institute, Karaikudi, Tamilnadu 630003, India
- Academy
of Scientific and Innovative Research (AcSIR), CSIR- Human Resource Development Centre, (CSIR-HRDC) Campus, Postal Staff College Area, Sector
19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201002, India
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15
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HU Y, GAO P, XU Z, ZHANG C, HUANG L, HU Y, AN Y, GU Y. Size-controllable carbon spheres doped Ni (II) for enhancing the catalytic oxidation of methanol. Turk J Chem 2021; 45:248-260. [PMID: 33679167 PMCID: PMC7925301 DOI: 10.3906/kim-2009-77] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 12/08/2020] [Indexed: 11/25/2022] Open
Abstract
Ni(II)/CSs were prepared using a simple two-step hydrothermal method. The morphology and composition of the catalysts were studied with scanning electron microscope, transmission electron microscope, and X-ray diffraction. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy showed that the surface of the prepared carbon spheres was rich in hydroxyl groups, which was beneficial to remove CO intermediates, and therefore, improving the catalytic efficiency and the antipoisoning ability of the catalysts. The results of cyclic voltammetry and chronoamperometry showed that the electrocatalytic activity and stability of Ni(II)/CSs were higher than that of unloaded NiAc under alkaline environment. When the nickel content was 5 wt.%, the peak oxidation current density of methanol on Ni(II)/CSs electrocatalyst reached the maximum of 34.54 mA/cm2, which was about 1.8 times that of unloaded NiAc. These results indicate that Ni(II)/CSs has potential applications in the electrocatalytic oxidation of methanol.
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Affiliation(s)
- Yifen HU
- Department of Chemistry, College of Science, University of Shanghai for Science and Technology, ShanghaiChina
| | - Pengyu GAO
- Department of Chemistry, College of Science, University of Shanghai for Science and Technology, ShanghaiChina
| | - Zhen XU
- Department of Chemistry, College of Science, University of Shanghai for Science and Technology, ShanghaiChina
| | - Chuan ZHANG
- Department of Chemistry, College of Science, University of Shanghai for Science and Technology, ShanghaiChina
| | - Lizhen HUANG
- Department of Chemistry, College of Science, University of Shanghai for Science and Technology, ShanghaiChina
| | - Yunting HU
- Department of Chemistry, College of Science, University of Shanghai for Science and Technology, ShanghaiChina
| | - Yarui AN
- Department of Chemistry, College of Science, University of Shanghai for Science and Technology, ShanghaiChina
| | - Yingying GU
- Department of Chemistry, College of Science, University of Shanghai for Science and Technology, ShanghaiChina
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16
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Yuda A, Ashok A, Kumar A. A comprehensive and critical review on recent progress in anode catalyst for methanol oxidation reaction. CATALYSIS REVIEWS 2020. [DOI: 10.1080/01614940.2020.1802811] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Afdhal Yuda
- Department of Chemical Engineering, Qatar University, Doha, Qatar
| | - Anchu Ashok
- Department of Chemical Engineering, Qatar University, Doha, Qatar
| | - Anand Kumar
- Department of Chemical Engineering, Qatar University, Doha, Qatar
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17
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Munde AV, Mulik BB, Chavan PP, Sathe BR. Enhanced electrocatalytic activity towards urea oxidation on Ni nanoparticle decorated graphene oxide nanocomposite. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136386] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Theres GS, Velayutham G, Suresh C, Krishnan PS, Shanthi K. Promotional effect of Ni–Co/ordered mesoporous carbon as non-noble hybrid electrocatalyst for methanol electro-oxidation. J APPL ELECTROCHEM 2020. [DOI: 10.1007/s10800-020-01412-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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19
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Adekunle AS, Oyekunle JA, Durosinmi LM, Oluwafemi OS, Olayanju DS, Akinola AS, Obisesan OR, Akinyele OF, Ajayeoba TA. Potential of cobalt and cobalt oxide nanoparticles as nanocatalyst towards dyes degradation in wastewater. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.nanoso.2019.100405] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Geng D, Zhu S, Chai M, Zhang Z, Fan J, Xu Q, Min Y. PdxFey alloy nanoparticles decorated on carbon nanofibers with improved electrocatalytic activity for ethanol electrooxidation in alkaline media. NEW J CHEM 2020. [DOI: 10.1039/c9nj06086c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We prepared bimetallic PdxFey alloy nanoparticles/carbon nanofiber composites with different Pd/Fe mole ratios and showed their advantage as a potential anode catalyst in ethanol fuel cells.
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Affiliation(s)
- Dan Geng
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power
- College of Environmental and Chemical Engineering
- Shanghai University of Electric Power
- Shanghai 200090
- China
| | - Sheng Zhu
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power
- College of Environmental and Chemical Engineering
- Shanghai University of Electric Power
- Shanghai 200090
- China
| | - Mengzhu Chai
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power
- College of Environmental and Chemical Engineering
- Shanghai University of Electric Power
- Shanghai 200090
- China
| | - Zhengyang Zhang
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power
- College of Environmental and Chemical Engineering
- Shanghai University of Electric Power
- Shanghai 200090
- China
| | - Jinchen Fan
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power
- College of Environmental and Chemical Engineering
- Shanghai University of Electric Power
- Shanghai 200090
- China
| | - Qunjie Xu
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power
- College of Environmental and Chemical Engineering
- Shanghai University of Electric Power
- Shanghai 200090
- China
| | - Yulin Min
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power
- College of Environmental and Chemical Engineering
- Shanghai University of Electric Power
- Shanghai 200090
- China
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21
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Mesoporous cobalt phosphate electrocatalyst prepared using liquid crystal template for methanol oxidation reaction in alkaline solution. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.07.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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22
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Zhao J, Wang C, Wang S, Zhang L, Zhang B. Augmenting the adsorption parameters of palladium onto pyromellitic acid-functionalized nanosilicas from aqueous solution. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123581] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Three-dimensional porous carbonaceous network with in-situ entrapped metallic cobalt for supercapacitor application. J Colloid Interface Sci 2019; 553:622-630. [PMID: 31247501 DOI: 10.1016/j.jcis.2019.06.070] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/18/2019] [Accepted: 06/20/2019] [Indexed: 01/05/2023]
Abstract
Herein, we outline the fabrication of highly porous three-dimensional carbon-fiber network anchored with uniform metallic cobalt (Co) via electrospinning and subsequent post-modification approaches. First, cobalt acetate solution saturated electrospun polyacrylonitrile (PAN) nanofibrous mat was subjected to sodium borohydride (NaBH4) solution which results in the fabrication of three dimensional (3D) hierarchical multilayer network. Restructuring of the 2D mat into multilayered sponges with metal particles entrapment is attributed to the in-situ generated hydrogen gas into the interconnected pores of the fibrous network simultaneous with reduction of cobalt salt into metallic cobalt by NaBH4. The resulting mesh was stabilized and carbonization at inert atmosphere to obtain metallic cobalt (Co) embedded 3D carbon nanofibrous networks (Co@3D-CNFs). Physicochemical characterization and electrochemical analysis were performed. Results show carbon network was found to be expanded with bubbling like structures often embedded metallic Co nanoparticles. X-ray diffraction (XRD) pattern confirms the existence of the metallic cobalt particles on the carbon fiber networks. Furthermore, we establish a resulting composite (Co@3D-CNFs) identify the enhanced electrochemical performance having specific capacitance 762 F g-1 compared to 173 and 180 F g-1 for corresponding @3D-CNFs and 2D carbon nanofiber network with cobalt doped (Co@2D-CNFs) counterparts, respectively. The assembled Co2@3D-CNFs//NGH ASC device exhibits a high energy density 24.6 W h Kg-1 at 797 W kg-1 power density with an operating voltage of 1.6 V (vs Ag/AgCl). The device further shows good capacitance retention (90.1%) after 5000 cycles. This research shows the simple and cost-effective strategy to make metallic particles embedded 3D porous carbonaceous electrode materials which can have great potential for energy storage application.
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24
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Chebrolu VTV, Balakrishnan B, Cho I, Bak JS, Kim HJ. Selenium vacancies enriched the performance of supercapacitors with excellent cycling stability via a simple chemical bath deposition method. Dalton Trans 2019; 48:8254-8263. [DOI: 10.1039/c9dt00758j] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report a simple and cost-effective route for the fabrication of NiWO4, NiWO4P, and NiWO4Se nanostructures using the chemical bath deposition method.
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Affiliation(s)
| | | | - Inho Cho
- Department of Electrical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Jin-Soo Bak
- Department of Electrical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Hee-Je Kim
- Department of Electrical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
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25
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PANINFs synthesized electrochemically as an electrode material for energy storage application. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2634-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Ghouri ZK, Elsaid K, Abdala A, Abdullah AM, Akhtar MS. CePd‐Nanoparticles‐Incorporated Carbon Nanofibers as Efficient Counter Electrode for DSSCs. ChemistrySelect 2018. [DOI: 10.1002/slct.201802507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zafar Khan Ghouri
- Chemical Engineering ProgramTexas A&M University at Qatar, P.O. 23874, Doha Qatar
| | - Khaled Elsaid
- Chemical Engineering ProgramTexas A&M University at Qatar, P.O. 23874, Doha Qatar
| | - Ahmed Abdala
- Chemical Engineering ProgramTexas A&M University at Qatar, P.O. 23874, Doha Qatar
| | | | - Mohammed Shaheer Akhtar
- New & Renewable Energy Material Development Center (NewREC)Chonbuk National University, Jeonju 561–756 Republic of Korea
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27
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Barakat NAM, Hassan AAY, Matar SMES, Awad MOA, Ali ASY. ZrO 2/TiO 2 nanofiber catalyst for effective liquefaction of agricultural wastes in subcritical methanol. SEP SCI TECHNOL 2018. [DOI: 10.1080/01496395.2018.1458876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Nasser Aly Mohamed Barakat
- Organic Materials and Fiber Engineering Department and BionanoSystem Engineering Department, College of Engineering, Chonbuk National University, Jeonju, South Korea
- Chemical Engineering Department, Faculty of Engineering, Minia University, El Minia, Egypt
| | - Ayman Ahmed Yousef Hassan
- Chemical Engineering Department, Faculty of Engineering, Jazan University, Jazan, Saudi Arabia
- Mathematics and Physics Engineering Department, Faculty of Engineering in Matteria, Helwan University, Cairo, Egypt
| | - Saleh Mohamed El-Said Matar
- Chemical Engineering Department, Faculty of Engineering, Jazan University, Jazan, Saudi Arabia
- Bioprocess Development Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technology Applications, New Burg Al-Arab, Alexandria, Egypt
| | - Mohamed Obaid Ahmad Awad
- Organic Materials and Fiber Engineering Department and BionanoSystem Engineering Department, College of Engineering, Chonbuk National University, Jeonju, South Korea
| | - Ahmed Salaheldin Yasin Ali
- Organic Materials and Fiber Engineering Department and BionanoSystem Engineering Department, College of Engineering, Chonbuk National University, Jeonju, South Korea
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28
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Experimental and DFT investigation of 3D-HBGP/Pt/Co as a superb electrocatalyst for methanol oxidation reaction. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.05.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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29
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Zheng Y, Zhang X, Zhang Z, Li Y, Sun Y, Lou Y, Li X, Lu Y. Preparation and application of ZnO doped Pt-CeO2 nanofibers as electrocatalyst for methanol electro-oxidation. J RARE EARTH 2018. [DOI: 10.1016/j.jre.2018.02.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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31
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Shahrokhian S, Rezaee S. Fabrication of Trimetallic Pt−Pd−Co Porous Nanostructures on Reduced Graphene Oxide by Galvanic Replacement: Application to Electrocatalytic Oxidation of Ethylene Glycol. ELECTROANAL 2017. [DOI: 10.1002/elan.201700355] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Saeed Shahrokhian
- Department of Chemistry; Sharif University of Technology; Tehran 11155-9516 Iran
- Institute for Nanoscience and Technology; Sharif University of Technology; Tehran Iran
| | - Sharifeh Rezaee
- Department of Chemistry; Sharif University of Technology; Tehran 11155-9516 Iran
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32
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Zhang J, Feng A, Bai J, Tan Z, Shao W, Yang Y, Hong W, Xiao Z. One-Pot Synthesis of Hierarchical Flower-Like Pd-Cu Alloy Support on Graphene Towards Ethanol Oxidation. NANOSCALE RESEARCH LETTERS 2017; 12:521. [PMID: 28866842 PMCID: PMC5581744 DOI: 10.1186/s11671-017-2290-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Accepted: 08/23/2017] [Indexed: 05/09/2023]
Abstract
The synergetic effect of alloy and morphology of nanocatalysts play critical roles towards ethanol electrooxidation. In this work, we developed a novel electrocatalyst fabricated by one-pot synthesis of hierarchical flower-like palladium (Pd)-copper (Cu) alloy nanocatalysts supported on reduced graphene oxide (Pd-Cu(F)/RGO) for direct ethanol fuel cells. The structures of the catalysts were characterized by using scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectrometer (XPS). The as-synthesized Pd-Cu(F)/RGO nanocatalyst was found to exhibit higher electrocatalytic performances towards ethanol electrooxidation reaction in alkaline medium in contrast with RGO-supported Pd nanocatalyst and commercial Pd black catalyst in alkaline electrolyte, which could be attributed to the formation of alloy and the morphology of nanoparticles. The high performance of nanocatalyst reveals the great potential of the structure design of the supporting materials for the future fabrication of nanocatalysts.
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Affiliation(s)
- Jingyi Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China
| | - Anni Feng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China
| | - Jie Bai
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China
| | - Zhibing Tan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China
| | - Wenyao Shao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China
| | - Yang Yang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China
| | - Wenjing Hong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China
| | - Zongyuan Xiao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 China
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33
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ZnO@C (core@shell) microspheres derived from spent coffee grounds as applicable non-precious electrode material for DMFCs. Sci Rep 2017; 7:1738. [PMID: 28496121 PMCID: PMC5431908 DOI: 10.1038/s41598-017-01463-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 03/28/2017] [Indexed: 11/08/2022] Open
Abstract
Although numerous reports have introduced non precious electrocatalysts for methanol oxidation, most of those studies did not consider the corresponding high onset potential which restricts utilization in real fuel cells. In this study, an -90 mV [vs. Ag/AgCl] onset potential non-precious electrocatalyst is introduced as an applicable anode material for the direct methanol fuel cells. Moreover, the proposed material was prepared from a cheap and abundantly existing resource; the spent coffee grounds. Typically, the spent coffee grounds were facilely converted to core@shell (ZnO@C) microspheres through a two-step approach, involving chemical activation and a subsequent calcination at temperature of 700 °C. Activation of the carbon derived from the spent coffee grounds was performed with ZnCl2 which acts as pore-forming agent as well as a precursor for the ZnO. The structure and morphology were characterized by (XRD), (SEM), and (TEM) analyses while the electrochemical characterizations was evaluated by cyclic voltammetry (CV) technique. Besides the comparatively very low onset potential, the introduced microspheres exhibited relatively high current density; 17 mA/cm2. Overall, based on the advantages of the green source of carbon and the good electrocatalytic activity, the spent coffee grounds-derived carbon can be considered a promise anode material for the DMFCs.
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34
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Microwave-Assisted Synthesis of Co3(PO4)2 Nanospheres for Electrocatalytic Oxidation of Methanol in Alkaline Media. Catalysts 2017. [DOI: 10.3390/catal7040119] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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35
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Papaderakis A, Anastopoulos A, Sotiropoulos S. Electrochemical studies of processes occurring at the polycrystalline Cu electrode/methanol interface. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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36
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Barakat NA, Motlak M, Ghouri ZK, Yasin AS, El-Newehy MH, Al-Deyab SS. Nickel nanoparticles-decorated graphene as highly effective and stable electrocatalyst for urea electrooxidation. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.05.011] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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37
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Efficiency enhancement of dye-sensitized solar cells by use of ZrO2-doped TiO2 nanofibers photoanode. J Colloid Interface Sci 2016; 476:9-19. [PMID: 27179174 DOI: 10.1016/j.jcis.2016.04.051] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/27/2016] [Accepted: 04/27/2016] [Indexed: 10/21/2022]
Abstract
Due to the good stability and convenient optical properties, TiO2 nanostructures still the prominent photoanode materials in the Dye Sensitized Solar Cells (DSCs). However, the well-known low bandgap energy and weak adsorption affinity for the dye distinctly constrain the wide application. This work discusses the impact of Zr-doping and nanofibrous morphology on the performance and physicochemical properties of TiO2. Zr-doped TiO2 nanofibers (NFs), with various zirconia content (0, 0.5, 1, 1.5 and 2wt%) were prepared by calcination of electrospun mats composed of polyvinyl acetate, titanium isopropoxyl and zirconium n-propoxyl. For all formulations, the results have shown that the prepared materials are continuous, randomly oriented, and good morphology nanofibers. The average diameter decreased from 353.85nm to 210.78nm after calcination without a considerable influence on the nanofibrous structure regardless the zirconia content. XRD result shows that there is no Rutile nor Brookite phases in the obtained material and the average crystallite size of the sample is affected by the presence of Zr-doping and changed from 23.01nm to 37.63nm for TiO2 and Zr-doped TiO2, respectively. Optical studies have shown Zr-doped TiO2 NFs have more absorbance in the visible region than that of pristine TiO2 NFs; the maximum absorbance is corresponding to the NFs having 1wt% zirconia. The improved spectra of Zr-doped TiO2 in the visible region is attributed to the heterostructure composition resulting from Zr-doping. The absorption bandgaps were calculated using Tauc model as 3.202 and 3.217 for pristine and Zr (1wt%)-doped TiO2 NFs, respectively. Furthermore, in Dye-sensitized Solar Cells, utilizing Zr (1wt%)-doped TiO2 nanofibers achieved higher efficiency of 4.51% compared to the 1.61% obtained from the pristine TiO2 NFs.
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38
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Tolba GM, Bastaweesy A, Ashour E, Abdelmoez W, Khalil KA, Barakat NA. Effective and highly recyclable ceramic membrane based on amorphous nanosilica for dye removal from the aqueous solutions. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2015.05.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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39
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Bano M, Ahirwar D, Thomas M, Naikoo GA, Sheikh MUD, Khan F. Hierarchical synthesis of silver monoliths and their efficient catalytic activity for the reduction of 4-nitrophenol to 4-aminophenol. NEW J CHEM 2016. [DOI: 10.1039/c5nj03710g] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Epoch-making catalytic activities of silver monoliths against the reduction of 4-NP to 4-AP and their industrial importance.
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Affiliation(s)
- Mustri Bano
- Nanomaterials Discovery Laboratory
- Department of Chemistry
- Dr. H. S. Gour Central University
- Sagar–470003
- India
| | - Devendra Ahirwar
- Nanomaterials Discovery Laboratory
- Department of Chemistry
- Dr. H. S. Gour Central University
- Sagar–470003
- India
| | - Molly Thomas
- Nanomaterials Discovery Laboratory
- Department of Chemistry
- Dr. H. S. Gour Central University
- Sagar–470003
- India
| | - Gowhar Ahmad Naikoo
- Nanomaterials Discovery Laboratory
- Department of Chemistry
- Dr. H. S. Gour Central University
- Sagar–470003
- India
| | - Mehraj Ud-Din Sheikh
- Nanomaterials Discovery Laboratory
- Department of Chemistry
- Dr. H. S. Gour Central University
- Sagar–470003
- India
| | - Farid Khan
- Nanomaterials Discovery Laboratory
- Department of Chemistry
- Dr. H. S. Gour Central University
- Sagar–470003
- India
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40
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Bajaj B, Joh HI, Jo SM, Kaur G, Sharma A, Tomar M, Gupta V, Lee S. Controllable one step copper coating on carbon nanofibers for flexible cholesterol biosensor substrates. J Mater Chem B 2016; 4:229-236. [DOI: 10.1039/c5tb01781e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrospun carbon nanofibers (CNFs) decorated with copper oxide nanoparticles were successfully synthesized using a one step and modified hydroxyl ion assisted alcohol reduction method.
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Affiliation(s)
- Bharat Bajaj
- Carbon Convergence Materials Research Center
- Institute of Advanced Composite Materials
- Korea Institute of Science and Technology
- Jeollabuk-do 565-905
- Korea
| | - Han I. Joh
- Carbon Convergence Materials Research Center
- Institute of Advanced Composite Materials
- Korea Institute of Science and Technology
- Jeollabuk-do 565-905
- Korea
| | - Seong M. Jo
- Carbon Convergence Materials Research Center
- Institute of Advanced Composite Materials
- Korea Institute of Science and Technology
- Jeollabuk-do 565-905
- Korea
| | - Gurpreet Kaur
- Department of Physics and Astrophysics
- University of Delhi
- New Delhi-110007
- India
| | - Anjali Sharma
- Department of Physics and Astrophysics
- University of Delhi
- New Delhi-110007
- India
| | - Monika Tomar
- Department of Physics
- Miranda House
- University of Delhi
- New Delhi-110007
- India
| | - Vinay Gupta
- Department of Physics and Astrophysics
- University of Delhi
- New Delhi-110007
- India
| | - Sungho Lee
- Carbon Convergence Materials Research Center
- Institute of Advanced Composite Materials
- Korea Institute of Science and Technology
- Jeollabuk-do 565-905
- Korea
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41
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Habibi B, Delnavaz N. Electrooxidation of glycerol on nickel and nickel alloy (Ni–Cu and Ni–Co) nanoparticles in alkaline media. RSC Adv 2016. [DOI: 10.1039/c5ra26006j] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the present study, nickel (Ni) and Ni alloy (Ni–Cu and Ni–Co) nanoparticles modified carbon-ceramic electrodes (Ni/CCE, Ni–Cu/CCE and Ni–Co/CCE) were prepared by an electrochemical process for the oxidation of glycerol.
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Affiliation(s)
- Biuck Habibi
- Electroanalytical Chemistry Laboratory
- Department of Chemistry
- Faculty of Sciences
- Azarbaijan Shahid Madani University
- Tabriz
| | - Nasrin Delnavaz
- Electroanalytical Chemistry Laboratory
- Department of Chemistry
- Faculty of Sciences
- Azarbaijan Shahid Madani University
- Tabriz
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42
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Influence of copper content on the electrocatalytic activity toward methanol oxidation of Co(χ)Cu(y) alloy nanoparticles-decorated CNFs. Sci Rep 2015; 5:16695. [PMID: 26568442 PMCID: PMC4645225 DOI: 10.1038/srep16695] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 10/19/2015] [Indexed: 11/09/2022] Open
Abstract
In this study, CoCu alloy nanoparticles-incorporated carbon nanofibers are introduced as effective non precious electrocatalyst for methanol oxidation in alkaline medium. The introduced electrocatalyst has been synthesized by simple and effective process; electrospinning. Typically, calcination, in nitrogen atmosphere, of electrospun nanofibers composed of cobalt acetate, copper acetate and poly (vinyl alcohol) leads to form carbon nanofibers decorated by CoCu nanoparticles. The nanofibrous morphology and alloy structure have been confirmed by SEM, TEM and XRD analyses. Investigation of the electrocatalytic activity indicates that copper content has strong influence, the alloy nanoparticles having the composition Cu5%Co95% showed distinct high performance; 100 times higher than other formulations. Overall, the introduced study revealed the veil about the distinct role of copper in enhancing the electrocatalytic activity of cobalt-based materials.
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43
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Synthesis of bi-phase dispersible core-shell FeAu@ZnO magneto-opto-fluorescent nanoparticles. Sci Rep 2015; 5:16384. [PMID: 26548369 PMCID: PMC4637858 DOI: 10.1038/srep16384] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 10/14/2015] [Indexed: 02/04/2023] Open
Abstract
Bi-phase dispersible core-shell FeAu@ZnO magneto-opto-fluorescent nanoparticles were synthesized by a modified nanoemulsion process using poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEO-PPO-PEO) as the surfactant. The morphology and crystal structure of the nanoparticles were studied by TEM/HRTEM and XRD. The nanoparticles manifest soft ferromagnetic and/or near superparamagnetic behavior with a small coercivity of ~19 Oe at room temperature. The corresponding magnetic hysteresis curves were elucidated by the modified Langevin equation. The FTIR study confirms the PEO-PPO-PEO molecules on the surface of the nanoparticles. The UV-vis and PL results reveal the well-behaved absorption bands including surface plasmon resonance and multiple visible fingerprint photoluminescent emissions of the nanoparticles dispersed in both hydrophilic and hydrophobic solvents. Moreover, the processes of solvent dispersion-collection of the nanoparticles were demonstrated for application readiness of such core-shell nanostructures.
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Barakat NA, Moustafa HM, Nassar M, Abdelkareem MA, Mahmoud M, Almajid AA, Khalil KA. Distinct influence for carbon nano-morphology on the activity and optimum metal loading of Ni/C composite used for ethanol oxidation. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.079] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Cui X, Guo W, Zhou M, Yang Y, Li Y, Xiao P, Zhang Y, Zhang X. Promoting effect of Co in Ni(m)Co(n) (m + n = 4) bimetallic electrocatalysts for methanol oxidation reaction. ACS APPLIED MATERIALS & INTERFACES 2015; 7:493-503. [PMID: 25482138 DOI: 10.1021/am506554b] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ni-based bimetallic alloys have superior physiochemical characteristics compared to monometallic Ni. In this study, a new type of low cost bimetallic NimCon (n + m = 4) electrocatalysts with high active surface were synthesized on Ti substrate through a hydrogen evolution assisted electrodeposition method. The as-prepared NimCon were characterized by XRD, EDS, and SEM. It was revealed that the composition, surface morphology, as well as the crystal phase structure of the bimetallic NimCon electrocatalysts were significantly changed with the increased content of cobalt. Electrochemical measurements showed that the bimetallic NimCon catalysts, compared with the monometallic Ni, have superior catalytic activity and stability toward the methanol electrooxidation reaction. Additionally, Ni2Co2 sample presented the highest oxidation current density and the best durability. The mechanism study based on electrochemical experiments and density functional theory based calculations showed that the doping of Co in NimCon can signally improve the surface coverage of the redox species, weaken the CO adsorption, as well as adjust the CH3OH adsorption. Such understanding is of important directive significance to design efficient nonprecious catalysts.
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Affiliation(s)
- Xun Cui
- College of Chemistry and Chemical Engineering, and ‡College of Physics, Chongqing University , Chongqing 400044, China
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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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Li C, Wang ZH, Yu DG, Williams GR. Tunable biphasic drug release from ethyl cellulose nanofibers fabricated using a modified coaxial electrospinning process. NANOSCALE RESEARCH LETTERS 2014; 9:258. [PMID: 24940180 PMCID: PMC4035684 DOI: 10.1186/1556-276x-9-258] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Accepted: 05/12/2014] [Indexed: 05/30/2023]
Abstract
This manuscript reports a new type of drug-loaded core-shell nanofibers that provide tunable biphasic release of quercetin. The nanofibers were fabricated using a modified coaxial electrospinning process, in which a polyvinyl chloride (PVC)-coated concentric spinneret was employed. Poly (vinyl pyrrolidone) (PVP) and ethyl cellulose (EC) were used as the polymer matrices to form the shell and core parts of the nanofibers, respectively. Scanning and transmission electron microscopy demonstrated that the nanofibers had linear morphologies and core-shell structures. The quercetin was found to be present in the nanofibers in the amorphous physical status, on the basis of X-ray diffraction results. In vitro release profiles showed that the PVP shell very rapidly freed its drug cargo into the solution, while the EC core provided the succedent sustained release. Variation of the drug loading permitted the release profiles to be tuned.
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Affiliation(s)
- Chen Li
- Key Laboratory of Chemical Biology and Molecular Engineering, College of Life Science, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China
| | - Zhuan-Hua Wang
- Key Laboratory of Chemical Biology and Molecular Engineering, College of Life Science, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China
| | - Deng-Guang Yu
- School of Materials Science & Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
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