Effect of the active metal on the catalytic activity of the titanate nanotubes for dry reforming of methane

Coelho, Davi C.; Filho, J. Mendes; Oliveira, Alcinéia C.; Lucrédio, Alessandra Fonseca; Assaf, Elisabete Moreira; Rodríguez‐Castellón, Enrique

doi:10.1016/j.cej.2016.01.051

Cited by 39 publications

(32 citation statements)

References 42 publications

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“…In Figure c, both Na 1s spectra show a peak at 1071.2 eV characteristic of sodium‐bonded to the trititanate structure . This was also consistent with XRD and Raman spectroscopy results.…”

Section: Resultssupporting

confidence: 83%

“…However, the TiNT bands at 190, 278 and 445 cm −1 were red‐shifted to 179, 273 and 435 cm −1 ; respectively. These displacements could be indicative of strong interaction between rhodium particles and the titanate nanotube surface ,,. Similar results were reported by Hodos et al., in their characterization of sodium titanate and CdS doped titanate nanotubes prepared by hydrothermal method.…”

Section: Resultsmentioning

confidence: 94%

“…By the other hand, Figure b displays the O 1s region for both materials, revealing the presence of two peaks corresponding to the bulk O 2− oxygen atoms characteristic of titanate samples (529.6 eV and 529.7 eV, respectively) and of adsorbed H 2 O (534.4 eV) ,. Also, a tail in the O 1s level is due to the presence of surface hydroxyl groups on the TiNT . The results of the Rh 3d XPS spectrum (Figure d) show two peaks at 307.3 and 311.6 eV, which correspond to Rh 0 at the Rh 3d5/2 and 3d3/2 levels, respectively ,.…”

Section: Resultsmentioning

confidence: 97%

“…The changes of the intensity and the shifts of binding energy of O 1s and Ti 2p lines in TiNT and reduced Rh/TiNT could be evidence of strong electronic interactions between TiNT and the supported Rh. Similar results were described by others during the incorporation of Rh, Ni, Pt, and Co on titanate nanotubes ,,,…”

Section: Resultsmentioning

confidence: 99%

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An In Situ Infrared Study of CO₂ Hydrogenation to Formic Acid by Using Rhodium Supported on Titanate Nanotubes as Catalysts

Ruiz-García¹,

Fierro-González

Handy

et al. 2019

ChemistrySelect

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Titanate nanotubes (TiNT) were synthesized by hydrothermal method and used as support of rhodium nanoparticles. Results of X-Ray diffraction (XRD) and Raman spectroscopy of TiNT revealed its structure of Na 2 Ti 3 O 7 , while the results of Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and physisorption of N 2 confirmed the multilayer nanotubular morphology with external diameter of ∼ 12 nm, length > 100 nm and a BET surface area of 195 m 2 g À 1 . The TEM analysis of the rhodium supported sample (Rh/TiNT) showed evidence of small (∼ 1 nm) and highly dispersed rhodium particles. Results of X-Ray Photoelectron Spectroscopy (XPS) revealed a strong electronic interaction between TiNT and Rh sites. The catalytic activity of Rh/TiNT for the hydrogenation of CO 2 to formic acid at moderate temperature (∼ 40°C) and atmospheric pressure was demonstrated as evidenced by results of Mass Spectrometry (MS) and in-situ Diffuse Reflectance Infrared with Fourier Transform Spectroscopy (DRIFTS). The in-situ studies showed active surface species bonded to support sites and to rhodium sites. It is proposed that under H 2 atmosphere, Na + cations near to Rh particles promote the conversion of CO 2 via dissociated H, allowing the formation of formate species at low temperature. The formate species and the hydride rhodium complexes are considered reaction intermediates.[a] Prof.

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“…In Figure c, both Na 1s spectra show a peak at 1071.2 eV characteristic of sodium‐bonded to the trititanate structure . This was also consistent with XRD and Raman spectroscopy results.…”

Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

An In Situ Infrared Study of CO₂ Hydrogenation to Formic Acid by Using Rhodium Supported on Titanate Nanotubes as Catalysts

Ruiz-García¹,

Fierro-González

Handy

et al. 2019

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…Metal nanoparticles (NPs) such as Pt, Rh, Ru, Ni, and Co on various supports have been proposed as effective catalysts for the production of syngas (H 2 /CO) via CO 2 reforming of methane . The catalytic performance relies heavily on the type of metal used, the nature and surface area of the support, the metal particle size, and the interaction between the metal and support . Generally, noble metals such as Pt, Rh, and Ru are highly active toward CH 4 –CO 2 reforming and are more resistant to carbon formation than the transition metals .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Hierarchical Co/MgO Catalyst for Enhanced CO₂ Reforming of CH₄ in a Fluidized‐Bed Reactor

Zhu

et al. 2018

AIChE Journal

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This work reports facile fabrication of fluidizable hierarchical Co-MgO particles with high dispersion of Co nanoparticles (NPs) and high surface oxygen vacancies for matching with the fluidized-bed reactor. The hierarchical Co-MgO catalyst exhibits higher activity and thermal stability for CH 4 -CO 2 reforming than the conventional impregnation Co/MgO catalyst. The enhanced prevention of Co NPs sintering of the hierarchical Co-MgO catalyst is attributed to the multilayer structure and the exposed MgO (111) face, which creates high surface oxygen vacancies, induces high Co dispersion to restrain Co NPs sintering, and supplies high resistance to graphite carbon deposition. A formation mechanism for the hierarchical MgO structure is also proposed. This formation of incomplete rhombohedron MgO particles with an exposed octahedral MgO (111) face is attributed to the electrostatic interaction of OH − . The proposed approach to improving catalytic activity by creation of hierarchical MgO particles can be expanded to other metal oxide catalysts. Recently, fluidization of solid-solution catalysts was proposed to enhance the catalytic performance of solid-solution catalysts for CO 2 reforming of methane. 25,26 It was found that methane and CO 2 conversions in the fluidized-bed reactor are

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Sr_xTi_1–xCoO_3±_δ Perovskite‐like Catalysts with Enhanced Activity for Hydrogen Production

Liu

Huang

et al. 2021

Chem Eng & Technol

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Autothermal reforming (ATR) of acetic acid (HOAc) is a promising and alternative route for hydrogen production from renewable resources, but catalyst deactivation caused by cobalt metal sintering and coking is a major concern in ATR. In this work, perovskite‐like catalysts of the formula SrxTi1–xCoO3±δ (x = 0, 0.2, 0.5, and 0.8) were prepared by evaporation‐induced self‐assembly and then evaluated in ATR for hydrogen production. The SrxTi1–xCoO3±δ catalysts exhibited high activity and stability as well as 100 % conversion of HOAc. Additionally, the Co particles with strong metal‐support interaction of SrTi(Co)O3 inhibited coking and agglomeration, and showed potential for hydrogen production by the ATR process.

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Effect of the active metal on the catalytic activity of the titanate nanotubes for dry reforming of methane

Cited by 39 publications

References 42 publications

An In Situ Infrared Study of CO₂ Hydrogenation to Formic Acid by Using Rhodium Supported on Titanate Nanotubes as Catalysts

An In Situ Infrared Study of CO₂ Hydrogenation to Formic Acid by Using Rhodium Supported on Titanate Nanotubes as Catalysts

Fabrication of Hierarchical Co/MgO Catalyst for Enhanced CO₂ Reforming of CH₄ in a Fluidized‐Bed Reactor

Sr_xTi_1–xCoO_3±_δ Perovskite‐like Catalysts with Enhanced Activity for Hydrogen Production

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Effect of the active metal on the catalytic activity of the titanate nanotubes for dry reforming of methane

Cited by 39 publications

References 42 publications

An In Situ Infrared Study of CO2 Hydrogenation to Formic Acid by Using Rhodium Supported on Titanate Nanotubes as Catalysts

An In Situ Infrared Study of CO2 Hydrogenation to Formic Acid by Using Rhodium Supported on Titanate Nanotubes as Catalysts

Fabrication of Hierarchical Co/MgO Catalyst for Enhanced CO2 Reforming of CH4 in a Fluidized‐Bed Reactor

SrxTi1–xCoO3±δ Perovskite‐like Catalysts with Enhanced Activity for Hydrogen Production

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Product

Resources

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An In Situ Infrared Study of CO₂ Hydrogenation to Formic Acid by Using Rhodium Supported on Titanate Nanotubes as Catalysts

An In Situ Infrared Study of CO₂ Hydrogenation to Formic Acid by Using Rhodium Supported on Titanate Nanotubes as Catalysts

Fabrication of Hierarchical Co/MgO Catalyst for Enhanced CO₂ Reforming of CH₄ in a Fluidized‐Bed Reactor

Sr_xTi_1–xCoO_3±_δ Perovskite‐like Catalysts with Enhanced Activity for Hydrogen Production