Open-circuit Potentials Established on Platinum and Gold Electrodes in PtCl2–4 Solutions After the Displacement of Copper Adatoms

Podlovchenko, B. I.; Maksimov, Yurii M.

doi:10.1016/j.mencom.2013.05.013

Cited by 9 publications

(9 citation statements)

References 14 publications

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“…The delays observed in the potential region from 300 to ~750 mV correspond to the removal of Cu ad according to the required for the MLCu ad removal increased with the increase in the gold coverage with platinum (curves 1 -3), which agrees with the high rates of Cu ad displacement from pc Au as compared with pc Pt[44]. However, for the formation ofPt 3 0 Au too, the time of MLCu ad displacement (curve 3) was still substantially lower than the time of MLCu ad displacement from pc Pt (curve 4).…”

supporting

confidence: 71%

“…However, E st is of the mixed nature, because the surface concentration of OH ads is determined by compensation of rates of the reduction of PtCl 4 2-and the oxidation of traces of organic substances and also of PtCl 4 2-to PtCl 6 2-. As was demonstrated in [44], the rate of reaction (2) is substantially lower on Au than on Pt.…”

Section: Transients Of Open-circuit Potentialmentioning

confidence: 55%

“…The peculiar shape of the E vs. τ curve at the formation of Pt 1 0 Au (curve 1 Fig.1), namely, the presence of a maximum, was already discussed in [44]. According to Au, Pt 2 0 Au, and Pt 3 0 Au, respectively.…”

Section: Transients Of Open-circuit Potentialmentioning

confidence: 71%

“…At these potentials, oxygen is not yet adsorbed on Au but is adsorbed in small amounts on Pt and its adsorption is reversible [43]. It can be assumed [44] that the reaction Pt 0 + H 2 O +e ↔ Pt 0 OH ads + H + is potential determining. However, E st is of the mixed nature, because the surface concentration of OH ads is determined by compensation of rates of the reduction of PtCl 4 2-and the oxidation of traces of organic substances and also of PtCl 4 2-to PtCl 6 2-.…”

Section: Transients Of Open-circuit Potentialmentioning

confidence: 99%

“…It is evident that the degree of dispersion of Pt remained high, albeit decreased with the increase in n. It should be noted that the m Pt values in table are slightly overestimated because we ignored the additional deposition of Pt due to the changes in the total electrode surface charge [43][44][45]. It is impossible to precisely determine this error; however, it can be approximately assessed as not exceeding 10%.…”

Section: Transients Of Open-circuit Potentialmentioning

confidence: 99%

See 4 more Smart Citations

Peculiarities in the electrocatalytic behavior of ultralow platinum deposits on gold synthesized by galvanic displacement

Podlovchenko

Maksimov

2015

Journal of Electroanalytical Chemistry

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supporting

confidence: 71%

Section: Transients Of Open-circuit Potentialmentioning

confidence: 55%

Section: Transients Of Open-circuit Potentialmentioning

confidence: 71%

Section: Transients Of Open-circuit Potentialmentioning

confidence: 99%

Section: Transients Of Open-circuit Potentialmentioning

confidence: 99%

See 3 more Smart Citations

Peculiarities in the electrocatalytic behavior of ultralow platinum deposits on gold synthesized by galvanic displacement

Podlovchenko

Maksimov

2015

Journal of Electroanalytical Chemistry

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Preparation of FePd‐RGO Bimetallic Composites with High Catalytic Activity for Formic Acid Electro‐Oxidation

2016

Chin. J. Chem.

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FePd-RGO composites through the growth of uniformly dispersed iron-palladium bimetallic nanoparticles (NPs) on reduced graphene oxide (RGO) nanosheets were prepared by a two-step method. The firstly formed Fe is used as the seed for the subsequent Pd growth. The formation of Fe NPs on RGO in the first step is performed by an in-situ reduction reaction with the reducer ethylene glycol under oil bath at 180 ℃. NPs in the as-prepared FePd-RGO have an average particle size of 6.5 nm, and Pd is added to one side of Fe which leads to the formation of Fe-Pd bimetallic interfaces. As compared with the commercial Pd black at the same loading, the composites have higher electro-catalytic activity, better electrochemical stability and higher resistance to CO poisoning for formic acid electro-oxidation. Figure 1 (a) TEM image of Fe-RGO; (b) TEM image of FePd-RGO with the corresponding local magnified image, and (c) HRTEM image of (b). Insets (a) and (c) are the corresponding SAED patterns, respectively. Preparation of FePd-RGO Bimetallic Composites with High Catalytic Activity Chin.

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One pot green synthesis of Pt, Co and Pt@Co core‐shell nanoparticles using Sechium edule

Chelli

Golder

2018

J of Chemical Tech & Biotech

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BACKGROUND: Common approaches for the synthesis of metallic nanostructured materials require the use of fine chemicals and energy-intensive processes. This work reports a simple eco-friendly (green) method to engineer the structure of cobalt (Co), platinum (Pt) and PtCo core-shell nanoparticles using plant-based analytes present in the extract of Sechium edule, the fruit of a perennial climber plant. RESULTS: Ascorbic acid (294 mg kg −1 dry fruit) was found to be the primary analyte and it acted for both metal ion reduction and nanoparticle destabilization forming a conjugate with the carboxylate group. The sharp rise in negative zeta-potential with the rise in pH from a highly acidic medium resulted from a strong destabilization tendency of Pt and Co nanostructures over a wide pH range. The size and colloidal stability, morphology and crystal structure were confirmed with the support of dynamic light scattering, transmission electron microscopy and X-ray diffraction. Co nanoprisms (47.3 nm), Pt nanospheres (28.6 nm) and PtCo core-shell (13.2-26.4 nm) nanoparticles were formed with a polydispersity index of 0.18-0.38. The synergistic effects such as ligand interaction between core and shell and the geometric effect improved the antibacterial activity against Bacillus subtilis and Escherichia coli bacteria in comparison to Pt nanospheres and Co nanoprisms, and these results were comparable with ciprofloxacin and cefprozil as the antibiotic controls. CONCLUSION: Plant analytes served as the electron donors for the formation of Pt and Co nanostructures and also stabilized the particles growth to tailor their structures for an improved antibacterial functionality.

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Open-circuit Potentials Established on Platinum and Gold Electrodes in PtCl2–4 Solutions After the Displacement of Copper Adatoms

Cited by 9 publications

References 14 publications

Peculiarities in the electrocatalytic behavior of ultralow platinum deposits on gold synthesized by galvanic displacement

Peculiarities in the electrocatalytic behavior of ultralow platinum deposits on gold synthesized by galvanic displacement

Preparation of FePd‐RGO Bimetallic Composites with High Catalytic Activity for Formic Acid Electro‐Oxidation

One pot green synthesis of Pt, Co and Pt@Co core‐shell nanoparticles using Sechium edule

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