Preparation and characterization of Pt supported on graphene with enhanced electrocatalytic activity in fuel cell

Xin, Yuchen; Liu, Jianguo; Zhou, Yong; Liu, Wenming; Gao, Jian; Xie, Yun; Yin, Ying; Zou, Zhigang

doi:10.1016/j.jpowsour.2010.08.051

Cited by 264 publications

(144 citation statements)

References 34 publications

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“…Then the filter cake was treated with 3 % HCl (1M) solution to regenerate the functional groups [20], it was dispersed and washed with deionized water for several times. The resulting sample was dried by lyophilization using (vacuum desiccator) to avoid the aggregation of graphene oxide during the drying process [21,22].…”

Section: Synthesis Of Graphene Oxide and Naoh Washmentioning

confidence: 99%

Improvement of graphene oxide characteristics depending on base washing

Kabel

Farag

Elnaggar

et al. 2015

J. Superhard Mater.

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Improvement of graphene oxide characteristics depending on base washingGraphene oxide (GO) FTIR). Raman spectroscopy analysis identified the defect degree and the transition of graphite from a crystalline to an amorphous structure and vice versa. The interlayer spacings of FLG and GO n were investigated by Xray diffraction (XRD) and the thermal stability of as-received and modified materials were examined by thermal gravimetric analysis (TGA). The morphological structure was characterized by scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). The various investigations confirmed that the properties of GO were improved by neutralization impact, which may pave the way to new developments in the GO-based applications.

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Section: Synthesis Of Graphene Oxide and Naoh Washmentioning

confidence: 99%

Improvement of graphene oxide characteristics depending on base washing

Kabel

Farag

Elnaggar

et al. 2015

J. Superhard Mater.

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“…However, in contrast, the proportion of Pt° on the surface is only 36.3% via chemical synchronous reduction [23]. Thus, the preparation method we used can effectively improve the content of Pt°.…”

Section: Resultsmentioning

confidence: 96%

Facile Electrodeposition of Flower-Like PMo12-Pt/rGO Composite with Enhanced Electrocatalytic Activity towards Methanol Oxidation

Wang

Zhang

et al. 2015

Catalysts

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A facile, rapid and green method based on potentiostatic electrodeposition is developed to synthesize a novel H3PMo12O40-Pt/reduced graphene oxide (denoted as PMo12-Pt/rGO) composite. The as-prepared PMo12-Pt/rGO is characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results reveal that graphene oxide (GO) is reduced to the rGO by electrochemical method and POMs clusters are successfully located on the rGO as the modifier. Furthermore, the PMo12-Pt/rGO composite shows higher electrocatalytic activity, better tolerance towards CO and better stability than the conventional pure Pt catalyst.

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“…In the first case, metal precursors are deposited on GO and then are reduced simultaneously with different reducing agents such as ethylene glycol, [156][157][158][159] NaBH 4 [160], PVP/ hydrazine, [161] sodium citrate, [162] microwave heating [163], and microwave polyol synthesis [164,165]. Another synthesis method consists in the electrochemical reduction of GO, following by the electrochemical deposition of nanoparticles [137].…”

Section: Graphenementioning

confidence: 99%

Carbon-Based Nanomaterials

Lavacchi

Vizza

2013

Nanostructure Science and Technology

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In fuel cells both the anode and cathode electrocatalysts are generally composed of nanosized metal particles which are supported on high surface area materials. The electrochemically active surface area (EASA), of catalysts used in low temperature fuel cells, such as polymer electrolyte membrane fuel cells (PEMFC, fed with hydrogen), direct alcohol fuel cells (DAFCs, alcohols: ethanol, methanol, polyalcohols), and direct formic acid fuel cells (DFAFC), has been found to be greatly enhanced when high surface area carbon-based materials are used as the support. As described in detail in Chap. 3, at the anode of a PEMFC dihydrogen is oxidized yielding protons and electrons. The protons pass through the cation exchange membrane toward the cathode where they are used in the reduction of oxygen to water together with the electrons arriving from the anode. The use of an anionexchange polymeric membrane as electrolyte, i.e., a membrane which allows only negative charges to pass, favors the production of negative ions, in this case OH -, in the process of oxygen reduction at the cathode, while the overall electrochemical process is left unvaried, as well as the reversible voltage of the cell. In PEMFCs, the polymeric electrolyte is generally Nafion Ò , a proton-exchange fluorinated membrane, about 50-200 lm thick. This withholds negatively charged ions (usually sulfonate groups -SO 3 -) covalently bonded to the polymeric backbone and therefore allows the passage of protons. Electrons are therefore forced to flow through the outer circuit. Nafion Ò , like other proton-exchange polymeric membranes, is most efficient when it works between 70 and 100°C, thus limiting the functionality of PEMFCs to low temperature operation.In DAFCs at the anode alcohols are oxidized to yield protons, electrons, and CO 2 or carboxylates, depending on the nature of the alcohol used as a fuel, while the cathode process is wholly similar to the one that takes place in PEMFCs.The most important component of a fuel cell is the membrane electrode assembly (MEA) that is composed of a catalytic layer where the electrochemical reactions occur, a diffusion layer providing access to the fuel and oxygen to the catalytic layer and a membrane where ions flow from one electrode to the other.

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Preparation and characterization of Pt supported on graphene with enhanced electrocatalytic activity in fuel cell

Cited by 264 publications

References 34 publications

Improvement of graphene oxide characteristics depending on base washing

Improvement of graphene oxide characteristics depending on base washing

Facile Electrodeposition of Flower-Like PMo12-Pt/rGO Composite with Enhanced Electrocatalytic Activity towards Methanol Oxidation

Carbon-Based Nanomaterials

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