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Bimetallic Pt-Pd nanostructures supported on MoS2 as an ultra-high performance electrocatalyst for methanol oxidation and nonenzymatic determination of hydrogen peroxide

The authors report on a composite based electrocatalyst for methanol oxidation and H 2 O 2 sensing. The composite consists of Pt nanoparticles (NPs), Pd nanoflakes, and MoS 2 . It was synthesized by chemical reduction followed by template-free electro-deposition of Pt NPs. FESEM images of the Pd nan... Full description

Journal Title: Mikrochimica acta (1966) 2018-08-02, Vol.185 (8), p.1-11
Main Author: Sha, Rinky
Other Authors: Vishnu, Nandimalla , Badhulika, Sushmee
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Vienna: Springer Vienna
ID: ISSN: 0026-3672
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recordid: cdi_proquest_miscellaneous_2083713106
title: Bimetallic Pt-Pd nanostructures supported on MoS2 as an ultra-high performance electrocatalyst for methanol oxidation and nonenzymatic determination of hydrogen peroxide
format: Article
creator:
  • Sha, Rinky
  • Vishnu, Nandimalla
  • Badhulika, Sushmee
subjects:
  • Acidic oxides
  • Analytical Chemistry
  • Bimetals
  • Catalysis
  • Characterization and Evaluation of Materials
  • Chemical reduction
  • Chemical synthesis
  • Chemistry
  • Chemistry and Materials Science
  • Electrodes
  • Energy conversion
  • Glassy carbon
  • Hydrogen peroxide
  • Methanol
  • Microengineering
  • Molybdenum disulfide
  • Morphology
  • Nanochemistry
  • Nanocomposites
  • Nanoparticles
  • Nanorods
  • Nanostructure
  • Nanotechnology
  • Organic chemistry
  • Original Paper
  • Oxidation
  • Palladium
  • Platinum
  • Silver chloride
  • Synergistic effect
ispartof: Mikrochimica acta (1966), 2018-08-02, Vol.185 (8), p.1-11
description: The authors report on a composite based electrocatalyst for methanol oxidation and H 2 O 2 sensing. The composite consists of Pt nanoparticles (NPs), Pd nanoflakes, and MoS 2 . It was synthesized by chemical reduction followed by template-free electro-deposition of Pt NPs. FESEM images of the Pd nanoflakes on the MoS 2 reveal nanorod-like morphology of the Pd NPs on the MoS 2 support, whilst FESEM images of the Pt-Pd/MoS 2 composite show Pt NPs in high density and with the average size of ~15 nm, all homogeneously electrodeposited on the Pd-MoS 2 composite. A glassy carbon electrode (GCE) was modified with the composite to obtain an electrode for methanol oxidation and H 2 O 2 detection. The modified GCE exhibits excellent durability with good catalytic efficiency (the ratio of forward and backward peak current density, I f /I b , is 3.23) for methanol oxidation in acidic medium. It was also used to sense H 2 O 2 at an applied potential of −0.35 V vs. Ag|AgCl which can be detected with a 3.4 μM lower limit of detection. The sensitivity is 7.64 μA μM −1  cm −2 and the dynamic range extends from 10 to 80 μM. This enhanced performance can be explained in terms of the presence of higher percentage of metallic 1T phase rather than a semiconducting 2H phase in MoS 2 . In addition, this is a result of the high surface area of MoS 2 with interwoven nanosheets, the uniform distribution of the Pt NPs without any agglomeration on MoS 2 support, and the synergistic effect of Pt NPs, Pd nanoflakes and MoS 2 nanosheets. In our perception, this binder-free nano-composite has promising applications in next generation energy conversion and in chemical sensing. Graphical abstract A composite consisting of palladium nanoflakes and molybdenum disulfide was decorated with platinum nanoparticles and then placed on a glassy carbon electrode which is shown to be a viable electrocatalyst for both methanol oxidation and detection of hydrogen peroxide.
language: eng
source:
identifier: ISSN: 0026-3672
fulltext: no_fulltext
issn:
  • 0026-3672
  • 1436-5073
url: Link


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titleBimetallic Pt-Pd nanostructures supported on MoS2 as an ultra-high performance electrocatalyst for methanol oxidation and nonenzymatic determination of hydrogen peroxide
creatorSha, Rinky ; Vishnu, Nandimalla ; Badhulika, Sushmee
creatorcontribSha, Rinky ; Vishnu, Nandimalla ; Badhulika, Sushmee
descriptionThe authors report on a composite based electrocatalyst for methanol oxidation and H 2 O 2 sensing. The composite consists of Pt nanoparticles (NPs), Pd nanoflakes, and MoS 2 . It was synthesized by chemical reduction followed by template-free electro-deposition of Pt NPs. FESEM images of the Pd nanoflakes on the MoS 2 reveal nanorod-like morphology of the Pd NPs on the MoS 2 support, whilst FESEM images of the Pt-Pd/MoS 2 composite show Pt NPs in high density and with the average size of ~15 nm, all homogeneously electrodeposited on the Pd-MoS 2 composite. A glassy carbon electrode (GCE) was modified with the composite to obtain an electrode for methanol oxidation and H 2 O 2 detection. The modified GCE exhibits excellent durability with good catalytic efficiency (the ratio of forward and backward peak current density, I f /I b , is 3.23) for methanol oxidation in acidic medium. It was also used to sense H 2 O 2 at an applied potential of −0.35 V vs. Ag|AgCl which can be detected with a 3.4 μM lower limit of detection. The sensitivity is 7.64 μA μM −1  cm −2 and the dynamic range extends from 10 to 80 μM. This enhanced performance can be explained in terms of the presence of higher percentage of metallic 1T phase rather than a semiconducting 2H phase in MoS 2 . In addition, this is a result of the high surface area of MoS 2 with interwoven nanosheets, the uniform distribution of the Pt NPs without any agglomeration on MoS 2 support, and the synergistic effect of Pt NPs, Pd nanoflakes and MoS 2 nanosheets. In our perception, this binder-free nano-composite has promising applications in next generation energy conversion and in chemical sensing. Graphical abstract A composite consisting of palladium nanoflakes and molybdenum disulfide was decorated with platinum nanoparticles and then placed on a glassy carbon electrode which is shown to be a viable electrocatalyst for both methanol oxidation and detection of hydrogen peroxide.
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subjectAcidic oxides ; Analytical Chemistry ; Bimetals ; Catalysis ; Characterization and Evaluation of Materials ; Chemical reduction ; Chemical synthesis ; Chemistry ; Chemistry and Materials Science ; Electrodes ; Energy conversion ; Glassy carbon ; Hydrogen peroxide ; Methanol ; Microengineering ; Molybdenum disulfide ; Morphology ; Nanochemistry ; Nanocomposites ; Nanoparticles ; Nanorods ; Nanostructure ; Nanotechnology ; Organic chemistry ; Original Paper ; Oxidation ; Palladium ; Platinum ; Silver chloride ; Synergistic effect
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descriptionThe authors report on a composite based electrocatalyst for methanol oxidation and H 2 O 2 sensing. The composite consists of Pt nanoparticles (NPs), Pd nanoflakes, and MoS 2 . It was synthesized by chemical reduction followed by template-free electro-deposition of Pt NPs. FESEM images of the Pd nanoflakes on the MoS 2 reveal nanorod-like morphology of the Pd NPs on the MoS 2 support, whilst FESEM images of the Pt-Pd/MoS 2 composite show Pt NPs in high density and with the average size of ~15 nm, all homogeneously electrodeposited on the Pd-MoS 2 composite. A glassy carbon electrode (GCE) was modified with the composite to obtain an electrode for methanol oxidation and H 2 O 2 detection. The modified GCE exhibits excellent durability with good catalytic efficiency (the ratio of forward and backward peak current density, I f /I b , is 3.23) for methanol oxidation in acidic medium. It was also used to sense H 2 O 2 at an applied potential of −0.35 V vs. Ag|AgCl which can be detected with a 3.4 μM lower limit of detection. The sensitivity is 7.64 μA μM −1  cm −2 and the dynamic range extends from 10 to 80 μM. This enhanced performance can be explained in terms of the presence of higher percentage of metallic 1T phase rather than a semiconducting 2H phase in MoS 2 . In addition, this is a result of the high surface area of MoS 2 with interwoven nanosheets, the uniform distribution of the Pt NPs without any agglomeration on MoS 2 support, and the synergistic effect of Pt NPs, Pd nanoflakes and MoS 2 nanosheets. In our perception, this binder-free nano-composite has promising applications in next generation energy conversion and in chemical sensing. Graphical abstract A composite consisting of palladium nanoflakes and molybdenum disulfide was decorated with platinum nanoparticles and then placed on a glassy carbon electrode which is shown to be a viable electrocatalyst for both methanol oxidation and detection of hydrogen peroxide.
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1Analytical Chemistry
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3Catalysis
4Characterization and Evaluation of Materials
5Chemical reduction
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17Nanochemistry
18Nanocomposites
19Nanoparticles
20Nanorods
21Nanostructure
22Nanotechnology
23Organic chemistry
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25Oxidation
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27Platinum
28Silver chloride
29Synergistic effect
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titleBimetallic Pt-Pd nanostructures supported on MoS2 as an ultra-high performance electrocatalyst for methanol oxidation and nonenzymatic determination of hydrogen peroxide
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jtitleMikrochimica acta (1966)
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abstractThe authors report on a composite based electrocatalyst for methanol oxidation and H 2 O 2 sensing. The composite consists of Pt nanoparticles (NPs), Pd nanoflakes, and MoS 2 . It was synthesized by chemical reduction followed by template-free electro-deposition of Pt NPs. FESEM images of the Pd nanoflakes on the MoS 2 reveal nanorod-like morphology of the Pd NPs on the MoS 2 support, whilst FESEM images of the Pt-Pd/MoS 2 composite show Pt NPs in high density and with the average size of ~15 nm, all homogeneously electrodeposited on the Pd-MoS 2 composite. A glassy carbon electrode (GCE) was modified with the composite to obtain an electrode for methanol oxidation and H 2 O 2 detection. The modified GCE exhibits excellent durability with good catalytic efficiency (the ratio of forward and backward peak current density, I f /I b , is 3.23) for methanol oxidation in acidic medium. It was also used to sense H 2 O 2 at an applied potential of −0.35 V vs. Ag|AgCl which can be detected with a 3.4 μM lower limit of detection. The sensitivity is 7.64 μA μM −1  cm −2 and the dynamic range extends from 10 to 80 μM. This enhanced performance can be explained in terms of the presence of higher percentage of metallic 1T phase rather than a semiconducting 2H phase in MoS 2 . In addition, this is a result of the high surface area of MoS 2 with interwoven nanosheets, the uniform distribution of the Pt NPs without any agglomeration on MoS 2 support, and the synergistic effect of Pt NPs, Pd nanoflakes and MoS 2 nanosheets. In our perception, this binder-free nano-composite has promising applications in next generation energy conversion and in chemical sensing. Graphical abstract A composite consisting of palladium nanoflakes and molybdenum disulfide was decorated with platinum nanoparticles and then placed on a glassy carbon electrode which is shown to be a viable electrocatalyst for both methanol oxidation and detection of hydrogen peroxide.
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doi10.1007/s00604-018-2927-y
orcididhttps://orcid.org/0000-0003-3237-3031