Borohydride oxidation reaction mechanisms and poisoning effects on Au, Pt and Pd bulk electrodes: From model (low) to direct borohydride fuel cell operating (high) concentrations

2018 ◽  
Vol 273 ◽  
pp. 483-494 ◽  
Author(s):  
Guillaume Braesch ◽  
Antoine Bonnefont ◽  
Vincent Martin ◽  
Elena R. Savinova ◽  
Marian Chatenet
Keyword(s):  
Fuel Cell ◽  
Reaction Mechanisms ◽  
Oxidation Reaction ◽  
Direct Borohydride Fuel Cell ◽  
Borohydride Oxidation ◽  
High Concentrations

Theoretical study of the dark-oxidation reaction mechanisms for organic polymers

2006 ◽  
Vol 427 (1-3) ◽  
pp. 35-40 ◽  
Author(s):  
Guixiu Wang ◽  
Rongxiu Zhu ◽  
Dongju Zhang ◽  
Chengbu Liu
Keyword(s):  
Reaction Mechanisms ◽  
Oxidation Reaction ◽  
Theoretical Study ◽  
Organic Polymers

Identification of Catalyst Structure during the Hydrogen Oxidation Reaction in an Operating PEM Fuel Cell

ACS Catalysis ◽  
2016 ◽  
Vol 6 (11) ◽  
pp. 7326-7334 ◽  
Author(s):  
Armin Siebel ◽  
Yelena Gorlin ◽  
Julien Durst ◽  
Olivier Proux ◽  
Frédéric Hasché ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Pem Fuel Cell ◽  
Hydrogen Oxidation Reaction ◽  
Catalyst Structure

Improvement of the Borohydride Oxidation Reaction by Electrocatalysis on Pt/[TaOPO4/VC]

2018 ◽  
Vol 86 (13) ◽  
pp. 659-670 ◽  
Author(s):  
Rachel Marielle Emily Hjelm ◽  
Yannick Garsany ◽  
Clémence Lafforgue ◽  
Marian Chatenet ◽  
Karen Swider-Lyons
Keyword(s):  
Oxidation Reaction ◽  
Borohydride Oxidation

scholarly journals Highly Enhanced Electrocatalytic Performances with Dendritic Bimetallic Palladium-Based Nanocrystals

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1337
Author(s):  
Respati K. Pramadewandaru ◽  
Jeong-Hu Shim ◽  
Young-Wook Lee ◽  
Jong-Wook Hong
Keyword(s):  
Fuel Cell ◽  
Oxidation Reaction ◽  
Water Electrolysis ◽  
Electrochemical Reactions ◽  
Methanol Oxidation Reaction ◽  
Dense Matrix ◽  
High Porosity ◽  
Pt Catalysts ◽  
Cetyltrimethylammonium Chloride ◽  
Bimetallic Palladium

The exploration of efficient nanocatalysts with high activity and stability towards water electrolysis and fuel cell applications is extremely important for the advancement of electrochemical reactions. However, it remains challenging. Controlling the morphology of bimetallic Pd–Pt nanostructures can be a great way to improve their electrocatalytic properties compared with previously developed catalysts. Herein, we synthesize bimetallic Pd–Pt nanodendrites, which consist of a dense matrix of unsaturated coordination atoms and high porosity. The concentration of cetyltrimethylammonium chloride was significant for the morphology and size of the Pd–Pt nanodendrites. Pd–Pt nanodendrites prepared by cetyltrimethylammonium chloride (200 mM) showed higher activities towards both the hydrogen evolution reaction and methanol oxidation reaction compared to their different Pd–Pt nanodendrite counterparts, commercial Pd, and Pt catalysts, which was attributed to numerous unsaturated surface atoms in well-developed single branches.

scholarly journals Electrochemical Performance Improvement of the Catalyst of the Methanol Micro-Fuel Cell Using Carbon Nanotubes

2019 ◽  
Author(s):  
Mohammad Kazemi Nasrabadi ◽  
Amir Ebrahimi-Moghadam ◽  
Mohammad Hosein Ahmadi ◽  
Ravinder Kumar ◽  
Narjes Nabipour
Keyword(s):  
Carbon Nanotubes ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Carbon Black ◽  
Oxidation Reaction ◽  
High Energy ◽  
Proton Exchange ◽  
Operating Conditions ◽  
High Energy Density ◽  
Methanol Oxidation Reaction

Due to low working temperature, high energy density and low pollution, proton exchange fuel cells have been investigated under different operating conditions in different applications. Using platinum catalysts in methanol fuel cells leads to increasing the cost of this kind of fuel cell which is considered as a barrier to the commercialism of this technology. For this reason, a lot of efforts have been made to reduce the loading of the catalyst required on different supports. In this study, carbon black (CB) and carbon nanotubes (CNT) have been used as catalyst supports of the fuel cell as well as using the double-metal combination of platinum-ruthenium (PtRu) as anode electrode catalyst and platinum (Pt) as cathode electrode catalyst. The performance of these two types of electro-catalyst in the oxidation reaction of methanol has been compared based on electrochemical tests. Results showed that the carbon nanotubes increase the performance of the micro-fuel cell by 37% at maximum power density, compared to the carbon black. Based on thee-electrode tests of chronoamperometry and voltammetry, it was found that the oxidation onset potential of methanol for CNT has been around 20% less than CB, leading to the kinetic improvement of the oxidation reaction. The current density of methanol oxidation reaction increased up to 62% in CNT sample compared to CB supported one, therefore the active electrochemical surface area of the catalyst has been increased up to 90% by using CNT compared to CB which shows the significant rise of the electrocatalytic activity in CNT supported catalyst. Moreover, the resistance of the CNT supported sample to poisonous intermediate species has been found 3% more than CB supported one. According to the chronoamperometry test results, it was concluded that the performance and sustainability of the CNT electro-catalyst show remarkable improvement compared to CB electro-catalyst in the long term.

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