Synthesis and characterization of colloidal platinum nanoparticles for electrochemical applications

“…Platinum is a favourable electrocatalyst in DMFCs because of its high durability and high efficiency toward the MOR [6] , [7] . In past years, many attempts have been devoted to reducing the Pt loading and its cost production while concurrently persist in to intensify the immanent activity and durability of the electrocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Biogenic platinum from agricultural wastes extract for improved methanol oxidation reaction in direct methanol fuel cell

Ishak

Kamarudin

Timmiati

et al. 2021

Journal of Advanced Research

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“…Platinum "nanopowder" and "nanoparticles" (hereinafter referred to as Pt nanopowder) are Pt nanocatalysts with renowned catalytic activity. It is usually synthesized by chemical vapor deposition, due to high size and shape control, 27 for uses such as proton exchange membrane (PEM) fuel cells, 50 integrated circuits, and optical applications. 51 Pt nanopowder is typically lighter in color than the distinctive dark gray to black color of Pt black.…”

Section: Introductionmentioning

confidence: 99%

Abundance and Speciation of Surface Oxygen on Nanosized Platinum Catalysts and Effect on Catalytic Activity

Serra-Maia

Winkler

Murayama

et al. 2018

ACS Appl. Energy Mater.

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Oxygen at the surface of nanosized platinum has a direct effect on catalytic activity of oxidation−reduction chemical reactions. However, the abundance and speciation of oxygen remain uncertain for platinum with different particle size and shape characteristics, which has hindered the development of fundamental property− activity relationships. We have characterized two commercially available platinum nanocatalysts known as Pt black and Pt nanopowder to evaluate the effects of synthesis and heating conditions on the physical and surface chemical properties, as well as on catalytic activity. Characterization using complementary electron microscopy, X-ray scattering, and spectroscopic methods showed that the larger average crystallite size of Pt nanopowder (23 nm) compared to Pt black (11 nm) corresponds with a 70% greater surface oxygen concentration. Heating the samples in air resulted in an increase in surface oxygen concentration for both nanocatalysts. Surface oxygen associated with platinum is in the form of chemisorbed oxygen, and no significant amounts of chemically bonded platinum oxide were found for any of the samples. The increase in surface oxygen abundance during heating depends on the initial size and surface oxygen content. Hydrogen peroxide decomposition rate measurements showed that larger particle size and higher surface chemisorbed oxygen correlate with enhanced catalytic activity. These results are particularly important for future studies that aim to relate the properties of platinum, or other metal nanocatalysts, with surface reactivity.

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“…For example PtNPs are of interest due to their catalytic activity [3–4], electrochemical applications [5], chemical sensing [6–9] and optical features related to surface plasmon resonance (SPR) that occurs in the ultraviolet range of electromagnetic spectrum. It has been observed that the SPR band of PtNPs generally occurs at about 220 nm and exhibits a broad peak [10].…”

Section: Introductionmentioning

confidence: 99%

Functionalized platinum nanoparticles with surface charge trigged by pH: synthesis, characterization and stability studies

Testa

Fontana

Venditti

et al. 2016

Beilstein J. Nanotechnol.

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In this work, the synthesis and characterization of functionalized platinum nanoparticles (PtNPs) have been investigated. PtNPs were obtained by a wet redox procedure using 2-diethylaminoethanethiol hydrochloride (DEA) as capping agent. By varying the Pt/thiol molar ratio, monodispersed and stable particles with diameters in the range of 3–40 nm were isolated. The amino functionality allows neutral particles to be obtained in basic water solution and positive charged nanoparticles in neutral or acidic water solution (pH 7–2), as confirmed by DLS and ζ-potential measurements. FTIR spectroscopy, FE-SEM, DLS and ζ-potential measurements confirmed the size and showed long term water stability (up to three months) of the colloidal system.

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Synthesis and characterization of colloidal platinum nanoparticles for electrochemical applications

Cited by 40 publications

References 35 publications

Biogenic platinum from agricultural wastes extract for improved methanol oxidation reaction in direct methanol fuel cell

Biogenic platinum from agricultural wastes extract for improved methanol oxidation reaction in direct methanol fuel cell

Abundance and Speciation of Surface Oxygen on Nanosized Platinum Catalysts and Effect on Catalytic Activity

Functionalized platinum nanoparticles with surface charge trigged by pH: synthesis, characterization and stability studies

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