Electrostatic Layer-by-Layer Assembled Au Nanoparticle/MWNT Thin Films: Microstructure, Optical Property, and Electrocatalytic Activity for Methanol Oxidation

The multilayer composite films consisting of poly (diallyldimethylammonium chloride) functionalized graphene (PDDA-rGO) and phosphomolybdic acid functionalized graphene (PMo12-rGO) were prepared by layer-by-layer self-assembly method. The {PDDA-rGO/PMo12-rGO}n multilayer composite films were used as a support for electro-deposition of Pt particles in situ. Cyclic voltammetry (CV), X-ray photoelectron spectroscopy and scanning electron microscopy were employed for examining the composition, structure, and morphology of the catalyst. Results revealed that the Pt/{PDDA-rGO/PMo12-rGO}n catalyst is successfully prepared and that the multilayer composite films support improves the dispersion of the Pt particles. CV and chronoamperometry were employed to evaluate the electrocatalytic performance for methanol oxidation. Results revealed that the electrocatalytic activity and stability of the Pt/{PDDA-rGO/PMo12-rGO}3 catalyst for methanol oxidation are considerably improved in comparison with that of the Pt/GCE catalyst. The current density for the oxidation of methanol increased from 0.66 mA/cm2 to 1.21 mA/cm2. In addition, the ratio of the forward current density to the backward current density (If/Ib) was 1.92 for Pt/{PDDA-rGO/PMo12-rGO}3 catalyst, corresponding to 1.3 times that of the Pt/GCE catalyst. This result indicated that the multilayer composite films remarkably enhanced the electrocatalytic activity regarding methanol oxidation.

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Au nanoparticle-decorated NiCo2O4 nanoflower with enhanced electrocatalytic activity toward methanol oxidation

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2017.10.250 ◽

2018 ◽

Vol 732 ◽

pp. 460-469 ◽

Cited By ~ 16

Author(s):

Haixing Gao ◽

Yang Cao ◽

Yong Chen ◽

Xiaoyong Lai ◽

Shujiang Ding ◽

...

Keyword(s):

Methanol Oxidation ◽

Electrocatalytic Activity ◽

Au Nanoparticle

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Organometallic precursor route for the fabrication of PtSn bimetallic nanotubes and Pt3Sn/reduced-graphene oxide nanohybrid thin films at oil–water interface and study of their electrocatalytic activity in methanol oxidation

Journal of Organometallic Chemistry ◽

10.1016/j.jorganchem.2014.07.004 ◽

2014 ◽

Vol 769 ◽

pp. 1-6 ◽

Cited By ~ 31

Author(s):

S. Jafar Hoseini ◽

Zahra Barzegar ◽

Mehrangiz Bahrami ◽

Mahmoud Roushani ◽

Mehdi Rashidi

Keyword(s):

Thin Films ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Methanol Oxidation ◽

Electrocatalytic Activity ◽

Water Interface ◽

Organometallic Precursor ◽

Reduced Graphene ◽

Precursor Route ◽

Oil Water

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Effect of metal alloying on morphology and catalytic activity of platinum-based nanostructured thin films in methanol oxidation reaction

RSC Advances ◽

10.1039/c6ra04518a ◽

2016 ◽

Vol 6 (51) ◽

pp. 45753-45767 ◽

Cited By ~ 15

Author(s):

S. Jafar Hoseini ◽

Mehrangiz Bahrami ◽

Mahboobeh Zanganeh ◽

Mahmoud Roushani ◽

Mehdi Rashidi

Keyword(s):

Thin Films ◽

Catalytic Activity ◽

Methanol Oxidation ◽

Electrocatalytic Activity ◽

Oxidation Reaction ◽

Liquid Interface ◽

Methanol Oxidation Reaction ◽

Nanostructured Thin Films ◽

High Degree

In this paper, alloy thin films with a high degree of alloying were synthesized through a liquid–liquid interface method showing remarkable electrocatalytic activity for the methanol oxidation reaction.

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Structural, Optical and Electrical Properties of Al+MoO3 and Au+MoO3 Thin Films Prepared by Magnetron Codeposition

Materials ◽

10.3390/ma14040766 ◽

2021 ◽

Vol 14 (4) ◽

pp. 766

Author(s):

Tihomir Car ◽

Ivan Jakovac ◽

Ivana Šarić ◽

Sigrid Bernstorff ◽

Maja Micetic

Keyword(s):

Thin Films ◽

Electrical Properties ◽

Au Nanoparticle ◽

Content Increase ◽

Optical And Electrical Properties ◽

Volume Percentage ◽

Sputtering Deposition ◽

Nanoparticle Formation ◽

Al Content ◽

Sputtering Power

Structural, optical and electrical properties of Al+MoO3 and Au+MoO3 thin films prepared by simultaneous magnetron sputtering deposition were investigated. The influence of MoO3 sputtering power on the Al and Au nanoparticle formation and spatial distribution was explored. We demonstrated the formation of spatially arranged Au nanoparticles in the MoO3 matrix, while Al incorporates in the MoO3 matrix without nanoparticle formation. The dependence of the Au nanoparticle size and arrangement on the MoO3 sputtering power was established. The Al-based films show a decrease of overall absorption with an Al content increase, while the Au-based films have the opposite trend. The transport properties of the investigated films also are completely different. The resistivity of the Al-based films increases with the Al content, while it decreases with the Au content increase. The reason is a different transport mechanism that occurs in the films due to their different structural properties. The choice of the incorporated material (Al or Au) and its volume percentage in the MoO3 matrix enables the design of materials with desirable optical and electrical characteristics for a variety of applications.

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