scholarly journals Electrospinning of CeO2 nanoparticle dispersions into mesoporous fibers: on the interplay of stability and activity in the HCl oxidation reaction

RSC Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 132-144 ◽  
Author(s):  
Maren Möller ◽  
Nikolay Tarabanko ◽  
Claas Wessel ◽  
Rüdiger Ellinghaus ◽  
Herbert Over ◽  
...  
Keyword(s):  
Surface Area ◽  
Oxidation Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Nanoparticle Dispersion ◽  
Nanoparticle Dispersions

High-surface-area CeO2 fibers are obtained from a specially developed nanoparticle dispersion and are used as catalysts in the HCl oxidation reaction.

Synthesis of High Surface Area Silicon Carbide and Its Application in CO Oxidation Reaction

2008 ◽  
Vol 24 (01) ◽  
pp. 171-175 ◽  
Author(s):  
ZHAN Ying-Ying ◽  
◽  
◽  
CAI Guo-Hui ◽  
ZHENG Yong ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Co Oxidation ◽  
Surface Area ◽  
Oxidation Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Co Oxidation Reaction

A high surface area flower-like Ni–Fe layered double hydroxide for electrocatalytic water oxidation reaction

2015 ◽  
Vol 44 (25) ◽  
pp. 11592-11600 ◽  
Author(s):  
Li-Jing Zhou ◽  
Xiaoxi Huang ◽  
Hui Chen ◽  
Panpan Jin ◽  
Guo-Dong Li ◽  
...  
Keyword(s):  
Surface Area ◽  
Layered Double Hydroxide ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
High Surface ◽  
High Surface Area ◽  
Oxidation Catalyst ◽  
Double Hydroxide

A high surface area flower-like Ni–Fe LDH was shown to be a water oxidation catalyst.

scholarly journals WO3Nanoplates Film: Formation and Photocatalytic Oxidation Studies

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Chin Wei Lai
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Oxidation Reaction ◽  
Photocatalytic Oxidation ◽  
Dye Degradation ◽  
Film Formation ◽  
High Surface ◽  
High Surface Area ◽  
Electrochemical Anodization

High surface area of tungsten oxide (WO3) nanoplates films was prepared via simple electrochemical anodization technique by controlling the fluoride content (NH4F) in electrolyte. The design and development of WO3-based nanostructure assemblies have gained significant interest in order to maximize specific surface area for harvesting more photons to trigger photocatalytic oxidation reaction. This study aims to determine the optimum content of NH4F in forming WO3nanoplates on W film with efficient photocatalytic oxidation reaction for organic dye degradation by utilizing our solar energy. The NH4F was found to influence the chemical dissolution and field-assisted dissolution rates, thus modifying the final morphological of WO3-based nanostructure assemblies film. It was found that 0.7 wt% of NH4F is the minimum amount to grow WO3nanoplates film on W film. The photocatalysis oxidation experimental results showed that WO3nanoplates film exhibited a maximum degradation of methyl orange dye (≈75%) under solar illumination for 5 hours. This behavior was attributed to the better charge carriers transportation and minimizes the recombination losses with specific surface area of nanoplates structure.

Tenacious Mass Transfer Limitations Drive Catalytic Selectivity during Electrochemical Carbon Dioxide Reduction

2019 ◽  
Author(s):  
Kailun Yang ◽  
Recep Kas ◽  
Wilson A. Smith
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Catalyst Layer ◽  
Active Surface ◽  
Active Surface Area ◽  
High Concentration ◽  
Copper Electrodes ◽  
Surface Enhanced ◽  
Local Current

<p>This study evaluated the performance of the commonly used strong buffer electrolytes, i.e. phosphate buffers, during CO<sub>2</sub> electroreduction in neutral pH conditions by using in-situ surface enhanced infrared absorption spectroscopy (SEIRAS). Unfortunately, the buffers break down a lot faster than anticipated which has serious implications on many studies in the literature such as selectivity and kinetic analysis of the electrocatalysts. Increasing electrolyte concentration, surprisingly, did not extend the potential window of the phosphate buffers due to dramatic increase in hydrogen evolution reaction. Even high concentration phosphate buffers (1 M) break down within the potentials (-1 V vs RHE) where hydrocarbons are formed on copper electrodes. We have extended the discussion to high surface area electrodes by evaluating electrodes composed of copper nanowires. We would like highlight that it is not possible to cope with high local current densities on these high surface area electrodes by using high buffer capacity solutions and the CO<sub>2</sub> electrocatalysts are needed to be evaluated by casting thin nanoparticle films onto inert substrates as commonly employed in fuel cell reactions and up to now scarcely employed in CO<sub>2</sub> electroreduction. In addition, we underscore that normalization of the electrocatalytic activity to the electrochemical active surface area is not the ultimate solution due to concentration gradient along the catalyst layer.This will “underestimate” the activity of high surface electrocatalyst and the degree of underestimation will depend on the thickness, porosity and morphology of the catalyst layer. </p> <p> </p>

scholarly journals Rugae-like FeP nanocrystal assembly on a carbon cloth: an exceptionally efficient and stable cathode for hydrogen evolution

Nanoscale ◽  
2015 ◽  
Vol 7 (25) ◽  
pp. 10974-10981 ◽  
Author(s):  
Xiulin Yang ◽  
Ang-Yu Lu ◽  
Yihan Zhu ◽  
Shixiong Min ◽  
Mohamed Nejib Hedhili ◽  
...  
Keyword(s):  
Gas Phase ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Efficiency ◽  
Carbon Cloth ◽  
Nanocrystal Assembly

High surface area FeP nanosheets on a carbon cloth were prepared by gas phase phosphidation of electroplated FeOOH, which exhibit exceptionally high catalytic efficiency and stability for hydrogen generation.

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