Template‐ and Surfactant‐free Room Temperature Synthesis of Self‐Assembled 3D Pt Nanoflowers from Single‐Crystal Nanowires

Sun, Shuhui; Yang, De‐Quan; Villers, Dominique; Zhang, Gaixia; Sacher, E.; Dodelet, Jean‐Pol

doi:10.1002/adma.200701408

Cited by 242 publications

(177 citation statements)

References 27 publications

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“…The characteristic peaks centered at 71.4 and 74.7 eV are attributed to Pt4f 7/2 and Pt4f 5/2 , respectively, agreeing with those published elsewhere [26]. The content of Pt evaluated by inductively coupled plasma optical emission spectroscopy (ICP-OES) is found to be 13.9 wt% in the synthesized Pt/GSH catalyst.…”

Section: R-gsh Itself Is Oxidized To Glutathione (O-gsh) As Far As Wsupporting

confidence: 88%

Platinum Nanoparticles Encapsulated in Carbon Microspheres: Toward Electro-Catalyzing Glucose with High Activity and Stability

Niu

Zhao

Lan

et al. 2015

Electrochimica Acta

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Highlights  Synthesis of Pt NPs dispersedly encapsulated in carbon microspheres; Reduced glutathione (R-GSH) as the capping agent and reductant simultaneously; Showing high electrocatalytic activity for glucose oxidation in neutral media; Possessing attractive stability of performance due to the AbstractElectro-oxidizing glucose effectively is well known as the critical point in developing analytical sensors and carbohydrate-based fuel cells. Here we prepared a new electrode material, platinum nanoparticles encapsulated in carbon microspheres (Pt/GSH), to promote the glucose electrocatalytic oxidation reaction in neutral media. The Pt/GSH composite was synthesized by using a simple hydrothermal method, with reduced glutathione (R-GSH) as the capping agent and reductant simultaneously, followed by a calcination process. It was found that the obtained Pt particles with a mean size of 26.8 nm were well dispersed in the interconnected carbon microspheres, providing a stable and efficient catalytic platform for glucose electro-oxidation. As a result, the synthesized catalyst exhibited higher activity for electro-catalyzing glucose compared to commercial Pt black and Pt/C catalysts, with a mass activity of 15.4 µA µg -1Pt , approximately 13 times of Pt black and 2.1 times of Pt/C. Besides, due to the decreased dissolution and agglomeration of Pt NPs in the carbon-encapsulated structure, the Pt/GSH catalyst kept quite stable activity upon reuse even in the presence of chloride ions.

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Section: R-gsh Itself Is Oxidized To Glutathione (O-gsh) As Far As Wsupporting

confidence: 88%

Platinum Nanoparticles Encapsulated in Carbon Microspheres: Toward Electro-Catalyzing Glucose with High Activity and Stability

Niu

Zhao

Lan

et al. 2015

Electrochimica Acta

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“…This clearly demonstrates that GOP was successfully reduced to rGOP by HI reduction method. As Figure 3B shows, the peaks with a binding energy of 74.58 eV and 71.18 eV are related to Pt 4f5/2 and Pt 4f7/2, respectively, indicating that the Pt is mainly metallic in Pt/rGOP [42]. Raman spectroscopy is an important experimental method in graphene research, which provides information about the structural defects and graphite structure of GOP and rGOP.…”

Section: Characterization Of Rgopmentioning

confidence: 99%

Flexible Hydrogen Peroxide Sensors Based on Platinum Modified Free-Standing Reduced Graphene Oxide Paper

Song

Wei

et al. 2018

Applied Sciences

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Abstract:In this article, we report a facile method to fabricate free-standing reduced graphene oxide paper (rGOP) by vacuum filtration. Pt nanoparticles were electrodeposited on reduced graphene oxide paper to construct a sensitive and flexible hydrogen peroxide (H 2 O 2 ) sensor. The properties of Pt/rGOP were characterized by scanning electron microscopy, energy dispersive X-ray, X-ray photoelectron spectroscopy and Raman spectroscopy. The electrochemical characterizations of the resulting sensor were carried out by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. The Pt/rGOP hybrid electrode had an excellent electrochemical property, with superb electrocatalytic activity, a large electrochemical active surface area, flexibility and high stability. The linear ranges of the as-prepared sensor for H 2 O 2 detection were divided into two linear sections: 0.2 µmol/L to 2.0 mmol/L and 2.0 to 8.5 mmol/L, with a detection limit of 100 nmol/L (S/N = 3) and a response time of less than 5 s. The proposed sensor has great potential to become a reliable and flexible tool in biosensor and point-of-care medical devices.

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“…Pt nanoparticles were deposited on TiSi 2 O x -NCNT composite nanostructures grown on carbon paper substrate by a formic acid method. 28,29 In this method, the Pt precursor (H 2 PtCl 6 ·6H 2 O, Aldrich, 99.95%) and formic acid…”

Section: ■ Introductionmentioning

confidence: 99%

TiSi₂O_x Coated N-Doped Carbon Nanotubes as Pt Catalyst Support for the Oxygen Reduction Reaction in PEMFCs

et al. 2013

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Composite nanostrucutres of TiSi 2 O x coated nitrogen-doped carbon nanotubes (NCNTs) were synthesized by a combination of chemical vapor deposition (CVD) and magnetron sputtering processes. The synthesized nanostructures were used as supports for Pt catalyst for oxygen reduction reaction (ORR) in proton exchange memberane fuel cells (PEMFCs). An amorphous layer of TiSi 2 O x with controlled thicknesses was sputtered on NCNTs and followed by post-treatment at high temperature (1000°C, An-TiSi 2 O x -NCNTs), inducing TiO 2 nanoparticles of around 5 nm in diameter embedded in the amorphous layer. Further analyses via X-ray absorption spectroscopy of the Ti K edge and Si K edge revealed the Ti atoms were in a TiO 2 rutile environment and the Si atoms were in a SiO 2 environment. Pt nanoparticles with an average diameter of 3 nm were deposited on the composite support, and their electrochemical behaviors toward ORR were studied. It was revealed that, even with lower electrochemical surface area (ECSA), Pt/An-TiSi 2 O x -NCNTs showed better catalytic activity toward ORR than Pt/NCNT catalysts. The origin of enhanced activity of Pt/An-TiSi 2 O x -NCNTs was examined by high resolution transmission electron microscopy (HRTEM) and the X-ray absorption near edge structure spectra (XANES) of the deposited Pt nanoparticles.

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Template‐ and Surfactant‐free Room Temperature Synthesis of Self‐Assembled 3D Pt Nanoflowers from Single‐Crystal Nanowires

Cited by 242 publications

References 27 publications

Platinum Nanoparticles Encapsulated in Carbon Microspheres: Toward Electro-Catalyzing Glucose with High Activity and Stability

Platinum Nanoparticles Encapsulated in Carbon Microspheres: Toward Electro-Catalyzing Glucose with High Activity and Stability

Flexible Hydrogen Peroxide Sensors Based on Platinum Modified Free-Standing Reduced Graphene Oxide Paper

TiSi₂O_x Coated N-Doped Carbon Nanotubes as Pt Catalyst Support for the Oxygen Reduction Reaction in PEMFCs

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Template‐ and Surfactant‐free Room Temperature Synthesis of Self‐Assembled 3D Pt Nanoflowers from Single‐Crystal Nanowires

Cited by 242 publications

References 27 publications

Platinum Nanoparticles Encapsulated in Carbon Microspheres: Toward Electro-Catalyzing Glucose with High Activity and Stability

Platinum Nanoparticles Encapsulated in Carbon Microspheres: Toward Electro-Catalyzing Glucose with High Activity and Stability

Flexible Hydrogen Peroxide Sensors Based on Platinum Modified Free-Standing Reduced Graphene Oxide Paper

TiSi2Ox Coated N-Doped Carbon Nanotubes as Pt Catalyst Support for the Oxygen Reduction Reaction in PEMFCs

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TiSi₂O_x Coated N-Doped Carbon Nanotubes as Pt Catalyst Support for the Oxygen Reduction Reaction in PEMFCs