scholarly journals Synthesis and Electrocatalytical Application of Hybrid Pd/Metal Oxides/MWCNTs

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Yuh-Jing Chiou ◽  
Guo-Hao Wu ◽  
Hong Ming Lin ◽  
Andrzej Borodziński ◽  
Piotr Kedzierzawski ◽  
...  
Keyword(s):  
Formic Acid ◽  
Chemical Reduction ◽  
Catalyst Support ◽  
Multiwall Carbon Nanotubes ◽  
Formic Acid Oxidation ◽  
Acid Oxidation ◽  
Impregnation Method ◽  
Chemical Reduction Method ◽  
Electrochemical Tests ◽  
Multiwall Carbon

The performance of Pd electrocatalysts for formic acid electrooxidation was improved by application of metal oxide-multiwall carbon nanotubes composites as a catalyst support. Hybrid oxides/MWCNTs were synthesized by two different methods: chemical reduction method and impregnation method. Pd based catalysts were synthesized by polyol method on the MWCNTs or oxide/MWCNTs composites. The In2O3 was deposited on MWCNTs by impregnation method (In2O3/MWCNTs-IM support) and in the presence of NaBH4 (In2O3/MWCNTs-NaBH4 support). The physical properties of the Pd/In2O3/MWCNTs-IM, Pd/In2O3/MWCNTs-NaBH4, Pd/SnO2/MWCNTs, and Pd/MWCNTs catalysts were characterized and their electrocatalytical performance in formic acid oxidation was compared. During Pd deposition on In2O3/MWCNTs-NaBH4 support, InPd2 structure was formed as observed by XRD. The electrochemical tests indicate that the two Pd/ In2O3/MWCNTs electrocatalysts have higher electrocatalytic activity than those of Pd/SnO2/MWCNTs and Pd/MWCNTs. The best performance was observed for the catalyst obtained by In2O3 impregnation of MWCNTs denoted by Pd/In2O3/MWCNTs-IM.

PVF-PPy Composite as Support Material for Facile Synthesis of Pt@PVF-PPy Catalyst and Its Electrocatalytic Activity Towards Formic Acid Oxidation

2018 ◽  
Vol 21 (3) ◽  
pp. 157-162
Author(s):  
Mutlu Sönmez Çelebi ◽  
Ayşe Nur Yılmaz
Keyword(s):  
Formic Acid ◽  
Conducting Polymer ◽  
Chemical Reduction ◽  
Supported Catalyst ◽  
Catalyst System ◽  
Formic Acid Oxidation ◽  
Superior Performance ◽  
Acid Oxidation ◽  
Reduction Methods

Preparation and characterization of a Pt-based catalyst supported on poly(vinylferrocenium)-poly(pyyrole) conducting polymer composite (Pt@PVF-PPy) was described for electrocatalytic oxidation of formic acid. Pt precursor was aqueous solution of K2PtCl4 and electrochemical and chemical reduction methods were compared for optimum catalyst performance. Other experimental parameters such as polymer film thickness and Pt loading were also optimized with respect to the formic acid oxidation peak current values. Scanning electron microscopy, cyclic voltammetry and chronoamperometry methods were used for physical and electrochemical characterization of the catalyst system. When compared with similar Pt-based conducting polymer supported catalyst systems, the Pt@PVF-PPy catalyst revealed superior performance for formic acid electrooxidation.

NANOELECTROCATALYSTS BASED PALLADIUM FOR FUEL CELLS WITH DIRECT OXIDATION OF FORMIC ACID

2019 ◽  
Vol 6 (3) ◽  
pp. 104-107
Author(s):  
Marina Vladimirovna Lebedeva ◽  
Alexey Petrovich Antropov ◽  
Alexander Victorovich Ragutkin ◽  
Nicolay Andreevich Yashtulov
Keyword(s):  
Formic Acid ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Electrode Materials ◽  
Formic Acid Oxidation ◽  
Energy Sources ◽  
Acid Oxidation ◽  
Direct Oxidation ◽  
Atomic Force ◽  
Formic Acid Oxidation Reaction

In paper electrode materials with palladium nanoparticles on polymer matrix substrates for energy sources have been formed. Nanocomposites were investigated by atomic force and scanning electron microscopy. The catalytic activity of formed electrodes in the formic acid oxidation reaction was evaluated by voltammetry method.

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