A fundamental study of platinum tetraammine impregnation of silica2. The effect of method of preparation, loading, and calcination temperature on (reduced) particle size

Miller, James E.

doi:10.1016/j.jcat.2004.04.007

Cited by 166 publications

(84 citation statements)

References 32 publications

(45 reference statements)

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“…The former value is greater than that characterizing bulk platinum (11 564 eV) and similar to those characterizing Pt II complexes, [14] including those supported on Al 2 O 3 . [15] The white line intensity and XANES features of the as-prepared sample at approximately 11 580 eV nearly match those of Pt II tetraamine complexes.…”

mentioning

confidence: 58%

A Single‐Site Platinum CO Oxidation Catalyst in Zeolite KLTL: Microscopic and Spectroscopic Determination of the Locations of the Platinum Atoms

Kistler

Chotigkrai

et al. 2014

Angewandte Chemie

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A stable site-isolated mononuclear platinum catalyst with a well-defined structure is presented. Platinum complexes supported in zeolite KLTL were synthesized from [Pt(NH 3 ) 4 ]-(NO 3 ) 2 , oxidized at 633 K, and used to catalyze CO oxidation. IR and X-ray absorption spectra and electron micrographs determine the structures and locations of the platinum complexes in the zeolite pores, demonstrate the platinumsupport bonding, and show that the platinum remained site isolated after oxidation and catalysis.

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mentioning

confidence: 58%

A Single‐Site Platinum CO Oxidation Catalyst in Zeolite KLTL: Microscopic and Spectroscopic Determination of the Locations of the Platinum Atoms

Kistler

Chotigkrai

et al. 2014

Angewandte Chemie

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“…Their lithographic techniques [213][214][215] in nanoparticle array synthesis and seedless polyol methods [216] for nanotube preparation showed efficient ways to control the size and shape of active sites. Other approaches such as outer-sphere control [217,218] and strong electrostatic adsorption [219,220] developed by other groups also shed light on architectures of heterogeneous catalysts. A Review detailing the state-of-the-art approaches in synthesizing nanoparticles and heterogeneous catalysts was just published.…”

Section: Discussionmentioning

confidence: 99%

Catalytic Partial Oxidation of Methanol and Ethanol for Hydrogen Generation

Hohn

Lin

2009

ChemSusChem

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Hydrogen-powered fuel cell vehicles feature high energy efficiency and minor environmental impact. Liquid fuels are ideal hydrogen carriers, which can catalytically be converted into syngas or hydrogen to power vehicles. Among the potential liquid fuels, alcohols have several advantages. The hydrogen/carbon ratio is higher than that of other liquid hydrocarbons or oxygenates, especially in the case of methanol. In addition, alcohols can be derived from renewable biomass resources. Catalytic partial oxidation of methanol or ethanol offers immense potential for onboard hydrogen generation due to its rapid reaction rate and exothermic nature. These benefits stimulate a burgeoning research community in catalyst design, reaction engineering, and mechanistic investigation. The purpose of this Minireview is to provide insight into syngas and hydrogen production from methanol and ethanol partial oxidation, particularly highlighting catalytic chemistry.

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“…Rational synthesis techniques were then developed by Regalbuto et al [11,12], initially to deposit Pt and Pd nanoparticles on inorganic supports. The technique is, however, quite versatile: it was adapted to various supports, like silica [13,14], alumina [15] and carbon [16,17], and can be extended to other metals and to bimetallic nanoparticles [18,19].…”

Section: Strong Electrostatic Adsorptionmentioning

confidence: 99%

Design of Pt/Carbon Xerogel Catalysts for PEM Fuel Cells

et al. 2015

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Abstract:The design of efficient catalytic layers of proton exchange membrane fuel cells (PEMFCs) requires the preparation of highly-loaded and highly-dispersed Pt/C catalysts. During the last few years, our work focused on the preparation of Pt/carbon xerogel electrocatalysts, starting from simple impregnation techniques that were further optimized via the strong electrostatic adsorption (SEA) method to reach high dispersion and a high metal weight fraction. The SEA method, which consists of the optimization of the precursor/support electrostatic impregnation through an adequate choice of the impregnation pH with regard to the support surface chemistry, leads to very well-dispersed Pt/C samples with a maximum 8 wt.% Pt after drying and reduction under H2. To increase the metal loading, the impregnation-drying-reduction cycle of the SEA method can be repeated several times, either with fresh Pt precursor solution or with the solution recycled from the previous cycle. In each case, a high dispersion (Pt particle size ~3 nm) is obtained. Finally, the procedure can be simplified by combination of the SEA technique with dry impregnation, leading to no Pt loss during the procedure.

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A fundamental study of platinum tetraammine impregnation of silica2. The effect of method of preparation, loading, and calcination temperature on (reduced) particle size

Cited by 166 publications

References 32 publications

A Single‐Site Platinum CO Oxidation Catalyst in Zeolite KLTL: Microscopic and Spectroscopic Determination of the Locations of the Platinum Atoms

A Single‐Site Platinum CO Oxidation Catalyst in Zeolite KLTL: Microscopic and Spectroscopic Determination of the Locations of the Platinum Atoms

Catalytic Partial Oxidation of Methanol and Ethanol for Hydrogen Generation

Design of Pt/Carbon Xerogel Catalysts for PEM Fuel Cells

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