Methanol, Ethanol, and Formic Acid Oxidation on New Platinum-Containing Catalysts
Electrooxidation of methanol, ethanol, and formic acid was studied on three platinum-containing electrocatalysts: PtCu/C, Pt/(SnO2/C), and Pt/C, Pt content being about 20 wt%. In all reactions, the integral specific activity of the catalysts, estimated from the results of cyclic voltammetry, grows i...
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| Veröffentlicht in: | Catalysts 2021-02, Vol.11 (2), p.158 |
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| creator | Menshikov, Vladislav S. Novomlinsky, Ivan N. Belenov, Sergey V. Alekseenko, Anastasya A. Safronenko, Olga I. Guterman, Vladimir E. |
| description | Electrooxidation of methanol, ethanol, and formic acid was studied on three platinum-containing electrocatalysts: PtCu/C, Pt/(SnO2/C), and Pt/C, Pt content being about 20 wt%. In all reactions, the integral specific activity of the catalysts, estimated from the results of cyclic voltammetry, grows in the Pt/C < Pt/(SnO2/C) < PtCu/C row. The influence of the reagent nature subjected to electrooxidation is manifested both in the difference of the absolute rate values of the corresponding reactions, decreasing in the order CH3OH > HCOOH > C2H5OH, and in the different ratio of these rates on different catalysts and at different potentials. Pt/(SnO2/C) catalyst containing SnO2 nanoparticles is the most active among the studied catalysts in methanol and formic acid electrooxidation reactions under potentiostatic conditions at the E = 0.60 V. Moreover, in formic acid electrooxidation reaction it is significantly superior to even the PtRu/C commercial catalyst. The reasons for the positive influence of Cu atoms and SnO2 nanoparticles on the catalytic activity of platinum are presumably associated with different effects: Interaction of the d-orbitals of copper and platinum atoms in bimetallic nanoparticles and implementation of the bifunctional catalysis mechanism on the adjacent platinum and tin dioxide nanoparticles. |
| doi_str_mv | 10.3390/catal11020158 |
| format | Article |
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In all reactions, the integral specific activity of the catalysts, estimated from the results of cyclic voltammetry, grows in the Pt/C < Pt/(SnO2/C) < PtCu/C row. The influence of the reagent nature subjected to electrooxidation is manifested both in the difference of the absolute rate values of the corresponding reactions, decreasing in the order CH3OH > HCOOH > C2H5OH, and in the different ratio of these rates on different catalysts and at different potentials. Pt/(SnO2/C) catalyst containing SnO2 nanoparticles is the most active among the studied catalysts in methanol and formic acid electrooxidation reactions under potentiostatic conditions at the E = 0.60 V. Moreover, in formic acid electrooxidation reaction it is significantly superior to even the PtRu/C commercial catalyst. The reasons for the positive influence of Cu atoms and SnO2 nanoparticles on the catalytic activity of platinum are presumably associated with different effects: Interaction of the d-orbitals of copper and platinum atoms in bimetallic nanoparticles and implementation of the bifunctional catalysis mechanism on the adjacent platinum and tin dioxide nanoparticles.</description><identifier>ISSN: 2073-4344</identifier><identifier>EISSN: 2073-4344</identifier><identifier>DOI: 10.3390/catal11020158</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Acids ; Alcohol fuels ; Alternative energy ; Atoms & subatomic particles ; Bimetals ; Carbon ; Catalysis ; Catalysts ; Catalytic activity ; Chemical reactions ; Copper ; Electrocatalysts ; Ethanol ; Formic acid ; Fuel cells ; Intermetallic compounds ; Methanol ; Nanoparticles ; Oxidation ; Platinum ; Poisoning ; Reagents ; Tin dioxide</subject><ispartof>Catalysts, 2021-02, Vol.11 (2), p.158</ispartof><rights>2021. 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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; MDPI - Multidisciplinary Digital Publishing Institute |
| subjects | Acids Alcohol fuels Alternative energy Atoms & subatomic particles Bimetals Carbon Catalysis Catalysts Catalytic activity Chemical reactions Copper Electrocatalysts Ethanol Formic acid Fuel cells Intermetallic compounds Methanol Nanoparticles Oxidation Platinum Poisoning Reagents Tin dioxide |
| title | Methanol, Ethanol, and Formic Acid Oxidation on New Platinum-Containing Catalysts |
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