scholarly journals Drying kinetics as Tool for the Assessment of Dynamic Porosity of Catalyst-Support Materials

2018 ◽  
pp. 1-10
Author(s):  
Geraldine Conejo-Barboza ◽  
Julio F. Mata-Segreda
Keyword(s):  
Catalyst Support ◽  
Drying Kinetics ◽  
Support Materials

Theoretical exploration of novel catalyst support materials for fuel cell applications

2016 ◽  
Vol 4 (39) ◽  
pp. 15181-15188 ◽  
Author(s):  
Xin Xia ◽  
Jane L. R. Yates ◽  
Glenn Jones ◽  
Misbah Sarwar ◽  
Ian Harkness ◽  
...  
Keyword(s):  
Material Selection ◽  
Catalyst Support ◽  
Oxygen Adsorption ◽  
Oxygen Binding ◽  
Support Material ◽  
Support Materials ◽  
Wetting Ability ◽  
Orr Activity ◽  
Novel Catalyst ◽  
Ability Parameter

(Left) The atomic model of oxygen adsorption on the MX supported Pt overlayer film. (Right) Support material selection through the Pt wetting ability parameter δ and oxygen binding energy, ΔE*[O]. The dashed line corresponds to the wetting parameter δ0 of the unsupported Pt(111) surface. The red line denotes the apex of ORR activity.

Catalyst support materials for prominent mineralization of bisphenol A in catalytic ozonation process

2016 ◽  
Vol 23 (10) ◽  
pp. 10223-10233 ◽  
Author(s):  
Magda Cotman ◽  
Boštjan Erjavec ◽  
Petar Djinović ◽  
Albin Pintar
Keyword(s):  
Bisphenol A ◽  
Catalyst Support ◽  
Catalytic Ozonation ◽  
Support Materials ◽  
Ozonation Process

Magnéli Phase Ti9O17- Catalyst Support Materials for ORR

2020 ◽  
Vol MA2020-02 (58) ◽  
pp. 2849-2849
Author(s):  
Jahangir Masud ◽  
Jivan Thakare ◽  
Ted Aulich ◽  
Michael Mann ◽  
Julia Xiaojun Zhao
Keyword(s):  
Catalyst Support ◽  
Support Materials ◽  
Magnéli Phase ◽  
Magneli Phase

scholarly journals DFT Study of MAX Phase Surfaces for Electrocatalyst Support Materials in Hydrogen Fuel Cells

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 77
Author(s):  
Jonathan Gertzen ◽  
Pieter Levecque ◽  
Tokoloho Rampai ◽  
Tracey van Heerden
Keyword(s):  
Fuel Cells ◽  
Catalyst Support ◽  
Max Phase ◽  
Hydrogen Fuel Cells ◽  
Hydrogen Fuel ◽  
Max Phases ◽  
Support Materials ◽  
Electrical Resistivities ◽  
Global Energy Supply ◽  
Experimental Values

In moving towards a greener global energy supply, hydrogen fuel cells are expected to play an increasingly significant role. New catalyst support materials are being sought with increased durability. MAX phases show promise as support materials due to their unique properties. The layered structure gives rise to various potential (001) surfaces. DFT is used to determine the most stable (001) surface terminations of Ti2AlC, Ti3AlC2 and Ti3SiC2. The electrical resistivities calculated using BoltzTraP2 show good agreement with the experimental values, with resistivities of 0.460  µΩ  m for Ti2AlC, 0.370  µΩ  m for Ti3AlC2 and 0.268  µΩ  m for Ti3SiC2. Surfaces with Al or Si at the surface and the corresponding Ti surface show the lowest cleavage energy of the different (001) surfaces. MAX phases could therefore be used as electrocatalyst support materials, with Ti3SiC2 showing the greatest potential.

In Situ NMR Imaging Studies of the Drying Kinetics of Porous Catalyst Support Pellets

1998 ◽  
Vol 102 (17) ◽  
pp. 3090-3098 ◽  
Author(s):  
Igor V. Koptyug ◽  
Vladimir B. Fenelonov ◽  
Ludmila Yu. Khitrina ◽  
Renad Z. Sagdeev ◽  
Valentin N. Parmon
Keyword(s):  
Catalyst Support ◽  
Drying Kinetics ◽  
Nmr Imaging ◽  
Imaging Studies ◽  
Porous Catalyst ◽  
Kinetics Of ◽  
In Situ Nmr

scholarly journals Single Co3O4 Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support Effects

2021 ◽  
Vol 22 (23) ◽  
pp. 13137
Author(s):  
Zhibin Liu ◽  
Manuel Corva ◽  
Hatem M. A. Amin ◽  
Niclas Blanc ◽  
Julia Linnemann ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Active Sites ◽  
Electrochemical Techniques ◽  
Catalyst Support ◽  
Intrinsic Activity ◽  
Size Distributions ◽  
Support Effects ◽  
Support Materials ◽  
Highly Active ◽  
Ensemble Effects

Single-entity electrochemistry allows for assessing electrocatalytic activities of individual material entities such as nanoparticles (NPs). Thus, it becomes possible to consider intrinsic electrochemical properties of nanocatalysts when researching how activity relates to physical and structural material properties. Conversely, conventional electrochemical techniques provide a normalized sum current referring to a huge ensemble of NPs constituting, along with additives (e.g., binders), a complete catalyst-coated electrode. Accordingly, recording electrocatalytic responses of single NPs avoids interferences of ensemble effects and reduces the complexity of electrocatalytic processes, thus enabling detailed description and modelling. Herein, we present insights into the oxygen evolution catalysis at individual cubic Co3O4 NPs impacting microelectrodes of different support materials. Simulating diffusion at supported nanocubes, measured step current signals can be analyzed, providing edge lengths, corresponding size distributions, and interference-free turnover frequencies. The provided nano-impact investigation of (electro-)catalyst-support effects contradicts assumptions on a low number of highly active sites.

Synthesis of Few-Atomic-Layer BN Hollow Nanospheres and Their Applications as Nanocontainers and Catalyst Support Materials

2016 ◽  
Vol 8 (3) ◽  
pp. 1578-1582 ◽  
Author(s):  
Haibin Si ◽  
Gang Lian ◽  
Jun Wang ◽  
Liyi Li ◽  
Qilong Wang ◽  
...  
Keyword(s):  
Catalyst Support ◽  
Atomic Layer ◽  
Hollow Nanospheres ◽  
Support Materials

Analysis of plasma for carbon nanotube growth by plasma-enhanced chemical vapor deposition

2005 ◽  
Vol 901 ◽  
Author(s):  
Atsushi Ozeki ◽  
Yoshiyuki Suda ◽  
Atsushi Okita ◽  
Junji Nakamura ◽  
Akinori Oda ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Relative Density ◽  
Vapor Deposition ◽  
Gas Flow ◽  
Catalyst Support ◽  
Chemical Vapor ◽  
Rf Plasma ◽  
Number Density ◽  
Support Materials

AbstractOptical emission spectra of a CH4/H2/Ar gas mixture plasma were observed during carbon nanotube (CNT) growth in RF plasma-enhanced chemical vapor deposition. CNTs with diameters of ∼10-30 nm and length of ∼6 μm were grown on double- and triple-layered films of catalyst/support materials (FexOy/TiO2 and Al2O3/FexOy/Al2O3) at the total gas pressures of 1-10 Torr with gas flow rates of CH4 = 27 sccm, H2 = 3 sccm, and Ar = 1 sccm. The number density of CNTs increased with the gas pressure, and Al2O3/FexOy/Al2O3 (each thickness of 1 nm) film yielded the thinnest CNTs with a high number density among the present catalysts. The spatial distributions of H atom relative density in the plasma were obtained by actinometry. The H relative density decreased with the pressure, and this suggests the suppression of CH3 radical generation in the plasma.

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