Electrochemical study on the adsorption of carbon oxides and oxidation of their adsorption products on platinum group metals and alloys

Siwek, H.; Łukaszewski, M.; Czerwiński, A.

doi:10.1039/b718286b

Cited by 27 publications

(32 citation statements)

References 105 publications

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“…The calibration constant determined by Ag and Pd deposition was 1.2 ng Hz À1 , very close to the theoretical value based on Sauerbrey equation [15]. Pd alloys were deposited electrochemically on the Au surfaces according to the procedures described earlier [10,[16][17][18][19][20]. The thickness of the alloy layers was 0.2-0.3 lm.…”

Section: Methodssupporting

confidence: 79%

“…Surface compositions were determined from the potential of the peak of surface oxide reduction [1,2,16,[19][20][21][22]. The CV curves are similar to those reported previously in the literature [1,2,[16][17][18][19][20][21][22]. One can distinguish hydrogen adsorption (1) and desorption (1 0 ) signals (the hydrogen region), then a potential range free from Faradaic processes (the double layer region-2), followed by surface oxide generation (3) and oxide reduction (3 0 ) currents (the oxygen region).…”

Section: Methodsmentioning

confidence: 99%

“…Such an analysis is possible owing to the fact that the voltammograms for pure Pd, Pt and Rh electrodes differ markedly from each other in respect of the region of oxygen adsorption, the potential of surface oxide reduction peak, and the appearance of the region where hydrogen electrosorption takes place. In the case of binary alloys, quantitative information about surface composition is available from the potential of surface oxide reduction peak [1,2,16,[19][20][21][22]; for the more complex Pd-Pt-Rh system, however, any CV-derived information concerning surface is mainly qualitative [10].…”

Section: Methodsmentioning

confidence: 99%

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Dissolution of noble metals and their alloys studied by electrochemical quartz crystal microbalance

Łukaszewski

Czerwiński

2006

Journal of Electroanalytical Chemistry

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Section: Methodssupporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Dissolution of noble metals and their alloys studied by electrochemical quartz crystal microbalance

Łukaszewski

Czerwiński

2006

Journal of Electroanalytical Chemistry

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“…CO and H 2 are main products in this process. Noble metals, such as Pd, platinum (Pt), gold (Au), rhodium (Rh), and their alloys are usually used as the electrodes as well as catalysts, which increase the total cost of the conversion process [24,29]. Transition metals and their complexes, such as [Pd(triphosphine)(PR 3 )](BF 4 ) 2 , aza-macrocyclic complexes of Ni (II), Co (II), and Cu (II), and [Pd(triphosphine)-(CH 3 CN)] 2+ can also be used as the catalysts in this process [23,25,30,31].…”

Section: Catalysts For Co 2 Conversion Into Hydrocarbon Fuelsmentioning

confidence: 99%

The energy-environment nexus: aerosol science and technology enabling solutions

Biswas

Wang

2011

Front. Environ. Sci. Eng. China

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Energy issues are important and consumption is slated to increase across the globe in the future. The energy-environment nexus is very important as strategies to meet future energy demand are developed. To ensure sustainable growth and development, it is essential that energy production is environmentally benign. There are two temporal issues-one that is immediate, and needs to address the environmental compliance of energy generation from fossil fuel sources; and second that is the need to develop newer alternate and more sustainable approaches in the future. Aerosol science and technology is an enabling discipline that addresses the energy issue over both these time scales. The paper is a review of aspects of aerosol science and engineering that helps address carbon neutrality of fossil fuels. Advanced materials to meet these challenges are discussed. Future approaches to effective harvesting of sunlight that are enabled by aerosol studies are discussed.

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“…This phenomenon originated most likely from the CO 2 adsorption on Pt surface accompanied by the generation of some CO at H ads sites (on Pt) according to so called reverse water gas shift reaction. [34][35][36] The appearance of a small anodic peak at about −0.03 V in CO 2 -free electrolyte (solid line in Figure 6a) originated from the analogous (H ads -induced) surface reduction involving bicarbonates or carbonates and leading to traces of CO adsorbates. The second (more positive) small anodic peak appearing at about 0.2 V (Figure 6a, solid line) was attributed to the adsorption of anions (HCO 3 − /CO 3 2− ) and the formation of the surface Pt oxide film.…”

mentioning

confidence: 99%

Carbon Dioxide Electroreduction at Highly Porous Nitrogen and Sulfur Co-Doped Iron-Containing Heterogeneous Carbon Gel

Dembińska

Kiciński

Januszewska

et al. 2017

J. Electrochem. Soc.

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The functionalized carbon nanostructure, nitrogen and sulfur co-doped iron-containing highly porous carbon gel (obtained via carbonization of corresponding organic gel) is considered here as a non-precious metal catalyst for the electroreduction of carbon dioxide in neutral solution (potassium bicarbonate at pH = 6.8). Various electrochemical measurements (performed in distinct modes and under different conditions) have been utilized to comment about the catalyst performance and the reaction mechanism, in particular about the reaction products and the relative contribution from hydrogen evolution. At low overpotentials, the carbon dioxide reduction is favored over the hydrogen evolution reaction. Combination of conventional (stationary) stripping-type and hydrodynamic (rotating ring-disk electrode) voltammetric approaches has been demonstrated to function as an unique electroanalytical tool here. The CO 2 -reduction products can be identified as adsorbates (oxidative stripping voltammetry) or monitored continuously (electrooxidation) at the Pt ring electrode. Finally, the results of both electrochemical diagnostic and parallel gas chromatographic analytical measurements are consistent with the view that, in the examined range of the potentials, CO is the main CO 2 -reduction product. The electrochemical reduction of carbon dioxide (CO 2 ) permits, in principle, selective generation of carbon-based fuels (or syngas) and, indirectly, lowering population of one of green-house gases in the atmosphere. Due to existence of two strong C=O bonds in the CO 2 molecule, its electroreduction requires high overpotentials, and the low reaction efficiency still remains fundamental problem limiting practical applications. 1-3During recent years, various catalysts, including noble and non-noble transition metals, as well as their numerous coordination compounds, have been considered as catalysts for CO 2 electroreduction. [4][5][6][7][8][9][10] It has been demonstrated that selectivity of the process depends largely on the activating adsorptive (CO 2 ) phenomena and the affinity of catalytic centers to adsorbed carbon monoxide intermediate. 11 Depending on the strength of adsorption and according to the Sabatier principle, CO may be further protonated or hydrogenated to CHO adsorbate. This step is often considered as the rate-determining one during the hydrocarbon formation.12 It should be noted here that, for example, copper is capable of successfully catalyzing electroreduction of CO 2 to multicarbon products, 13-15 palladium induces the reaction mainly to CO and H 2 and only small amounts of formate. 2,[16][17][18][19] Another important practical issue is related to the need of lowering costs of catalysts by substituting the noble metals with inexpensive abundant elements. There has been growing interest in catalysts based on nanostructured carbons that include the metal-free Ndoped systems and the metal-containing carbons. [20][21][22][23][24][25][26] For example, the biomimetic centers containing metallic moieties in the vi...

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Electrochemical study on the adsorption of carbon oxides and oxidation of their adsorption products on platinum group metals and alloys

Cited by 27 publications

References 105 publications

Dissolution of noble metals and their alloys studied by electrochemical quartz crystal microbalance

Dissolution of noble metals and their alloys studied by electrochemical quartz crystal microbalance

The energy-environment nexus: aerosol science and technology enabling solutions

Carbon Dioxide Electroreduction at Highly Porous Nitrogen and Sulfur Co-Doped Iron-Containing Heterogeneous Carbon Gel

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