Na+-intercalated carbon nanotubes-supported platinum nanoparticles as new highly effective catalysts for preferential CO oxidation in H2-rich stream

Wang, Chao; Yi, Guangquan; Lin, Hongyu; Yuan, Youzhu

doi:10.1016/j.ijhydene.2012.07.066

Cited by 10 publications

(4 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates the suitability of the synthesis method and the anchorage of the active phase on the surface of biochar was in good agreement with previous works [9,28]. It is well known that the interaction of the active metal with the carbon support can be modified by pre-treatment of the surface carbon, altering their point of zero charge (PZC).…”

Section: Physico-chemical Characterisationsupporting

confidence: 89%

Operando DRIFTS-MS Study of WGS and rWGS Reaction on Biochar-Based Pt Catalysts: The Promotional Effect of Na

Santos

Bobadilla

Odriozola

2018

View full text Add to dashboard Cite

Abstract:Biochar-based Pt catalysts, unpromoted and Na-promoted, were prepared by an incipient wetness impregnation method and characterised by Inductively coupled plasma mass spoectrometry (ICP-MS) analysis, X-ray diffraction, N 2 adsorption and transmission, and scanning electron microscopy. It was demonstrated that a sodium promoter modifies the acid-base properties of the support, altering the Pt-support interaction. An operando Diffuse reflectance infrared fourier transform spectroscopy-mass spectrometry (DRIFTS-MS) study was performed to gain insights into the reaction pathways and the mechanism of the Water-Gass-Shift (WGS) and the Reverse Water-Gass-Shift (rWGS) reactions. It was demonstrated that the addition of Na enhances the catalytic performance due to the changes induced by the alkali in the electronic structure of the Pt active sites. This effect favours the activation of H 2 O molecules during the WGS reaction and the dissociation of CO 2 during the rWGS reaction, although it may also favour the consecutive CO methanation pathway.

show abstract

Section: Physico-chemical Characterisationsupporting

confidence: 89%

Operando DRIFTS-MS Study of WGS and rWGS Reaction on Biochar-Based Pt Catalysts: The Promotional Effect of Na

Santos

Bobadilla

Odriozola

2018

View full text Add to dashboard Cite

show abstract

“…42 The aqueous solution of H 2 PtCl 6 was added to N-CNTs under stirring. 42 The aqueous solution of H 2 PtCl 6 was added to N-CNTs under stirring.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…Supported Pt catalysts were prepared by wet impregnation with aqueous solutions of chloroplatinic acid according to a procedure described in the literature. 42 The aqueous solution of H 2 PtCl 6 was added to N-CNTs under stirring. Aer 12 h of agitation at ambient temperature, the suspension was evaporated in a water bath at 60 C to remove water.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Platinum nanoparticles supported on N-doped carbon nanotubes for the selective oxidation of glycerol to glyceric acid in a base-free aqueous solution

Chen

Jin

et al. 2015

RSC Adv.

Self Cite

View full text Add to dashboard Cite

Selective oxidation of glycerol was carried out over Pt catalysts supported on nitrogen-doped carbon nanotubes (Pt/N-CNTs) with molecular oxygen under atmospheric pressure in base-free aqueous solution. The N-CNTs were readily synthesized through a catalyst-free approach of annealing the mixture of CNTs and melamine. Results of X-ray diffraction, nitrogen absorption, and Raman spectroscopy confirmed that the tubular structure of CNTs was intact during annealing. Analyses of transmission electron microscopy, X-ray photon spectroscopy, and temperature-programmed desorption indicated that the surface of the CNTs was successfully functionalized with nitrogen atoms, which changed the electronic structure and surface basicity of the N-CNTs. Pt/N-CNTs out-performed Pt/CNTs for glycerol oxidation in terms of glycerol conversion and glyceric acid selectivity. Pt/N-CNTs showed highly stable catalytic performance during consecutive recycles when the used catalyst was reduced in a H 2 atmosphere. † Electronic supplementary information (ESI) available: Physical properties of the catalyst supports. TEM images of catalysts 1% Pt/CNTs-353 and 1% Pt/N-CNTs(x). XRD patterns of the catalysts with different support materials. TEM images of catalysts aer 5 runs of reaction and XRD patterns of these catalysts before and aer reaction. TGA curves of catalysts before and aer 5 runs reactions. The activity of 1% Pt/CNTs-353 and 1% Pt/N-CNTs(5.74) catalysts in recycling experiments. See

show abstract

“…Pt-Co/CNTs [9], Ni-MgOPt/CNTs [10], Pt-Na/CNTs [11] and Ru-CNTs [12]), their use in microreactors for this process has not been reported, which can be probably attributed to the inherent difficulties in achieving a homogeneous and reproducible coating on the microchannels. The work of Thakur et al [13] is helpful to picture the complexities involved in the preparation of a carbon nanofiber layer as catalyst support in microreactors.…”

Section: Introductionmentioning

confidence: 99%

In-situ preparation of a highly accessible Pt/CNF catalytic layer on metallic microchannel reactors. Application to the SELOX reaction

Ramírez

Sebastián

Mallada

et al. 2015

Applied Catalysis A: General

View full text Add to dashboard Cite

Please cite this article as: Adrián Ramírez, Víctor Sebastián, Reyes Mallada, Jesús Santamaría, Antonio Monzón, In-situ preparation of a highly accessible Pt/CNF catalytic layer on metallic microchannel reactors.Application to the SELOX reaction, Applied Catalysis A, General http://dx. Graphical abstractHighlights  CNFs were directly grown on the channels of a stainless steel microreactor.  CNFs were selectively grown on the channels and no outside them.  in situ method to prepare highly accessible Pt catalyst on a carbon nanofiber support.  Pt NP`s highly dispersed, homogeneous Pt distribution on the carbon nanofibers. ABSTRACTA general method to prepare a catalytic coating on the surface of stainless steel microreactors has been developed. The catalytic support consists of a layer of randomly oriented, highly accessible carbon nanofibers (CNFs), directly grown on the surface of the channels by chemical vapor deposition (CVD) of ethanol. These CNFs are functionalized to acquire a positive charge before a solution containing metallic nanoparticles (Pt) is flown through the channels. The nanoparticles adhere to the surface of the CNFs thanks to electrostatic interactions. This process is carried out in-situ and the method can be easily adapted to larger scale production. These catalystcoated microchannel reactors have been tested in the selective oxidation (SELOX) of CO in the 2 presence of H2. The results were compared to those obtained in a conventional fixed bed reactor packed with Pt/CNTs. The microreactor clearly outperformed the fixed bed reactor at the same space velocity (WSHV = 2220 l/h gPt),), achieving total CO conversion at temperatures 50 ºC lower.

show abstract

Na+-intercalated carbon nanotubes-supported platinum nanoparticles as new highly effective catalysts for preferential CO oxidation in H2-rich stream

Cited by 10 publications

References 58 publications

Operando DRIFTS-MS Study of WGS and rWGS Reaction on Biochar-Based Pt Catalysts: The Promotional Effect of Na

Operando DRIFTS-MS Study of WGS and rWGS Reaction on Biochar-Based Pt Catalysts: The Promotional Effect of Na

Platinum nanoparticles supported on N-doped carbon nanotubes for the selective oxidation of glycerol to glyceric acid in a base-free aqueous solution

In-situ preparation of a highly accessible Pt/CNF catalytic layer on metallic microchannel reactors. Application to the SELOX reaction

Contact Info

Product

Resources

About