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New Electrochemical Approach for the Synthesis of Pd‐PdO/C Electrocatalyst and Application to Formic Acid Electrooxidation
Author(s) -
Kuriganova Alexandra B.,
Faddeev Nikita A.,
Leontyev Igor N.,
Allix Mathieu,
Rakhmatullin Aydar,
Smirnova Nina V.
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901628
Subject(s) - catalysis , formic acid , electrochemistry , electrocatalyst , inorganic chemistry , nuclear chemistry , chemistry , materials science , electrolyte , dispersion (optics) , nanoparticle , electrode , nanotechnology , organic chemistry , physics , optics
Pd‐PdO/C catalyst for formic acid electrooxidation has been synthesized via electrochemical dispersion of Pd foil electrodes under pulse alternating current conditions in NaCl aqueous electrolyte. About 35 wt% of the as‐prepared Pd‐PdO/C specimen is PdO as revealed by X‐ray diffraction. The microstructural characteristics and catalytic activity of the synthesized Pd/C catalyst have been compared with those of a Pt/C catalyst prepared under the same conditions. Pd nanoparticles of Pd‐PdO/C catalyst exhibit smaller average dimensions and narrower particle size distribution – 7.4±0.5 nm and 1.9±0.5 respectively for Pd and PdO particles. The process of ethanol electrooxidation on the catalyst was characterized by high overvoltage (up to 800 mV). The overvoltage of the formic acid electrochemical oxidation on Pd/C is 590 mV less than on Pt/C.