Synthesis of hybrid Pt/TiO2 (anatase)/MWCNTs nanomaterials by a combined sol–gel and polyol process

Lin, Kuan Nan; Liou, Wei-Jen; Yang, Tsung-Yeh; Li, Hongming; Lin, Chung Kwei; Chien, Sheng Hsuan; Chen, Wen‐Chang; Wu, She‐Huang

doi:10.1016/j.diamond.2008.07.017

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…The Pd–Au/MWCNTs (Pd 8.8 wt%, Au 10.0 wt%), Pd/MWCNTs (Pd 17.8 wt%) and Au/MWCNTs (18.0 wt%) were prepared by a polyol method 31, 32 followed by controlled atmosphere annealing. First, 0.010 g of purified MWCNTs was mixed with 25 ml EG by ultrasonic machine for half an hour.…”

Section: Methodsmentioning

confidence: 99%

Carbon nanotube‐supported bimetallic palladium–gold electrocatalysts for electro‐oxidation of formic acid

Chen

Liou

Lin

et al. 2010

Physica Status Solidi (a)

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It is known that palladium‐based catalysts are initially very active in direct formic acid oxidation but they suffer from fast deactivation caused by a strongly adsorbed CO intermediate. Reactivation of the catalysts involving application of anodic potential may cause palladium dissolution. The aim of the present study is to increase the stability and performance of palladium‐based catalysts in direct formic acid fuel cells (DFAFCs). Preparation and characterization of palladium/multiwalled carbon nanotubes (Pd/MWCNTs) and towards formic acid oxidation via different treatments are described. The catalysts were characterized by thermogravimetric analysis (TGA), X‐ray diffraction (XRD), transmission electron microscopy (TEM) and cyclic voltammetry (CV). It was shown that the Pd and Pd–Au MWCNTs supported catalysts after reduction in H2–Ar at 200 °C (R200 treatment) were highly active in formic acid electro‐oxidation, whereas the catalysts after heating in argon at 250 °C (C250 treatment) were inactive. The catalysts after hydrogen treatment have smaller metal particles and better contact with MWCNTs support. CV, simulating reactivation of the catalysts, showed that the Pd catalyst suffers from severe Pd dissolution, whereas for the Pd–Au selective leaching of Pd is considerably slower.

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Section: Methodsmentioning

confidence: 99%

Carbon nanotube‐supported bimetallic palladium–gold electrocatalysts for electro‐oxidation of formic acid

Chen

Liou

Lin

et al. 2010

Physica Status Solidi (a)

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“…10. The efficiency of Pt-TiO 2 /MWNT may relate to the Pt particles on TiO 2 aggregates were isolated the electrons transport which limited in activity by the insufficient local electronic conductivity of TiO 2 [Lin et al, 2009].The UV lights, mostly stimulates transfer of acadj@garmian.edu.krd Vol.5, No.2 (June, 2018)…”

Section: Mechanism Of the Reactionmentioning

confidence: 99%

“…Pt as noble metals with specific physical and chemical behavior which encourage widely used activation and enhance the activities of semiconductors [Shaoet al, 2010;Stefano et al, 2012]. The ternary composites Pt-TiO 2 /CNTs were used in many applications such Sensors [Stefano et al, 2012] hydrogen production [Firas et al, 2016] converted agent for CO to CO 2 [Lin et al, 2009] degradation of many pollutants [Shih et al, 2017]. The method of synthesized ternary composite technically influences with of preparations methods and the sequence of adding the three materials which rarely studied.…”

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confidence: 99%

Enhance the Activities of Hydrogen Production by Changing the Sequence of Preparation the Ternary Composite Pt -TiO 2 /MWNT

Abdulrazzak

Hussein

2018

Journal of Garmian University

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Two types of ternary Pt-TiO 2 /MWNT were synthesized by Sonochemical/Hydration-Dehydration methods which include photoplatinazation and supporting with MWNTs. The synthesized materials (Pt-TiO 2)/MWNT and Pt-(TiO 2 /MWNT) were characterized by X-ray diffraction, Raman spectroscopy, UV-Vis diffuse reflectance spectroscopy, scanning electron microscopy and transmission electron microscopy. The activity of (0.65 g/L) MWNT/TiO 2 /Ptwere estimated by H 2 production from (7.5 vol %) aqueous methanol solution. The results showed that platinizationof TiO 2 than create hybrid with MWNTs was more efficient in hydrogen production than platinazationofMWNT/ TiO 2 .The preparation method, homogenous distribution and localized of MWNTs with Pt onto TiO 2 shows sensitively influence in the achieving the best efficient charge separation and transfer in exist the platinum under UV-light (< 420 nm) irradiation.

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“…According to literature reports, TiO 2 /MWCNT nanocomposites are demonstrated to have improved photo-catalytic activity [25][26][27]. In addition, nanocomposites comprised of TiO 2 /MWCNTs are shown to have higher efficiency in solar cells [28]. According to literature reports, titania nanowires have been shown to be more efficient and catalytically active than TiO 2 spherical nanoparticles in various applications [29,30].…”

Section: Introductionmentioning

confidence: 99%

TiO2-nanowire/MWCNT composite with enhanced performance and durability for polymer electrolyte fuel cells

Selvaganesh¹,

Dhanasekaran²,

Bhat³

2017

Electrochemical Energy Technology

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Durability is a major issue and has been the growing focus of research for the commercialization of polymer electrolyte fuel cells (PEFCs). Corrosion of carbon support is a key parameter as it triggers the Pt catalyst degradation and affects cell performance, which in turn affects the longevity of the cells. Herein, we describe a hybrid composite support of TiO 2 -nanowires and Multiwalled carbon nanotubes (MWCNTs) that offers resistance to corrosion under stressful operating conditions. Titania nanowires which have been shown to be more efficient and catalytically active than spherically shaped TiO 2 . TiO 2 -MWCNT composites are prepared through a hydrothermal method, followed by Pt deposition using a polyol method. Crystal structure, morphology, and oxidation state are examined through various characterization techniques. Electrochemical performance of TiO 2 -nanowire/MWCNT composite-supported Pt at various ratios of TiO 2 /MWCNT is assessed in PEFCs. Pt on support with optimum composition of TiO 2 -nanowires to MWCNTs exhibits fuel cell performance superior to Pt on MWCNTs. Accelerated stress testing (AST) between 1 and 1.5 V reveals that the designed catalyst on nanocomposite support possesses superior electrochemical activity and shows only 16% loss in catalytic activity in relation to 35% for Pt/MWCNTs even after 6000 potential cycles. Subsequently, the samples were characterized after AST to correlate the loss in fuel cell performance

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Synthesis of hybrid Pt/TiO2 (anatase)/MWCNTs nanomaterials by a combined sol–gel and polyol process

Cited by 12 publications

References 10 publications

Carbon nanotube‐supported bimetallic palladium–gold electrocatalysts for electro‐oxidation of formic acid

Carbon nanotube‐supported bimetallic palladium–gold electrocatalysts for electro‐oxidation of formic acid

Enhance the Activities of Hydrogen Production by Changing the Sequence of Preparation the Ternary Composite Pt -TiO 2 /MWNT

TiO2-nanowire/MWCNT composite with enhanced performance and durability for polymer electrolyte fuel cells

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