Penetration of Sodium and Bath Constituents into Cathode Carbon Materials Used in Industrial Cells

2013 ◽  
pp. 953-959
Author(s):  
Conrad Krohn ◽  
Morten Sørlie ◽  
Harald A. Øye
2010 ◽  
Vol 446 ◽  
pp. 23-31
Author(s):  
Anastasia Pikasi ◽  
Pantelitsa Georgiou ◽  
Johannis Simitzis

Carbonaceous materials have been obtained by pyrolysis of composites based on olive stones biomass, novolac resin as binding agent, with or without an aromatic compound (naphthalene). The pyrolysis residue at 1000 °C is 40 w% and its electrical conductivity, σ, is 0.13 S/cm. Small cylindrical specimens have been manufactured and pyrolyzed at 1000 °C in order to be used as electrodes. Platinum was electrodeposited by cyclic voltammetry on these specimens using them as working electrodes or on commercial carbon fibres, respectively, for correlating purposes. The morphology of both carbon materials, used as electrodes, was characterized by SEM images and the presence of Pt was determined based on EDS analysis. The crystallographic planes of Pt–carbon of Pt deposited on carbon materials were characterized with XRD. The oxidation of ethanol from a proper solution using the carbonaceous specimen and the carbon fibres as working electrodes was examined by cyclic voltammetry.


2013 ◽  
pp. 1071-1178
Author(s):  
H.A. Øye ◽  
V. de Nora ◽  
J.-J. Duruz ◽  
G. Johnston

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4394
Author(s):  
Fatima-Zahra Azar ◽  
M. Ángeles Lillo-Ródenas ◽  
M. Carmen Román-Martínez

Catalysts consisting of Ru nanoparticles (1 wt%), supported on mesoporous activated carbons (ACs), were prepared and used in the one-pot hydrolytic hydrogenation of cellulose to obtain sorbitol. The carbon materials used as supports are a pristine commercial mesoporous AC (named SA), and two samples derived from it by sulfonation or oxidation treatments (named SASu and SAS, respectively). The catalysts have been thoroughly characterized regarding both surface chemistry and porosity, as well as Ru electronic state and particle size. The amount and type of surface functional groups in the carbon materials becomes modified as a result of the Ru incorporation process, while a high mesopore volume is preserved upon functionalization and Ru incorporation. The prepared catalysts have shown to be very active, with cellulose conversion close to 50% and selectivity to sorbitol above 75%. The support functionalization does not lead to an improvement of the catalysts’ behavior and, in fact, the Ru/SA catalyst is the most effective one, with about 50% yield to sorbitol, and a very low generation of by-products.


2016 ◽  
pp. 1171-1178 ◽  
Author(s):  
H. A. Øye ◽  
V. de Nora ◽  
J.-J. Duruz ◽  
G. Johnston

2019 ◽  
Vol 12 (02) ◽  
pp. 1930001 ◽  
Author(s):  
Renata Wlodarczyk

The PEMFC (Polymer Exchange Membrane Fuel Cell) is one of the most researched generators in hydrogen technology. The PEMFCs offer low emissions, several applications in industry with high power density. The basic material for the construction of components in low-temperature fuel cells is carbon or its allotropic forms and carbon nanomaterials. Carbon materials are used to build diffusion layers of electrodes, as catalyst carriers, for the construction of covers/interconnectors and as fuel. In this work, the carbon materials used to build a single cell have been reviewed taking into account various methods of fabrication and modification of materials.


2015 ◽  
Vol 60 (1) ◽  
pp. 117-120 ◽  
Author(s):  
R. Wlodarczyk

Abstract The porosity, distribution of pores, shape of pores and specific surface area of carbon materials were investigated. The study of sintered graphite and commercial carbon materials used in low-temperature fuel cells (Graphite Grade FU, Toray Teflon Treated) was compared. The study covered measurements of density, microstructural examinations and wettability (contact angle) of carbon materials. The main criterion adopted for choosing a particular material for components of fuel cells is their corrosion resistance under operating conditions of hydrogen fuel cells. In order to determine resistance to corrosion in the environment of operation of fuel cells, potentiokinetic curves were registered for synthetic solution 0.1M H2SO4+ 2 ppmF-at 80°C.


Carbon ◽  
2008 ◽  
Vol 46 (14) ◽  
pp. 1829-1840 ◽  
Author(s):  
M. Zhu ◽  
C.J. Weber ◽  
Y. Yang ◽  
M. Konuma ◽  
U. Starke ◽  
...  

TANSO ◽  
2003 ◽  
Vol 2003 (210) ◽  
pp. 236-242 ◽  
Author(s):  
Hiroshi Shioyame ◽  
Kazuaki Yasuda

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