Photo-generation of ultra-small Pt nanoparticles on carbon-titanium dioxide nanotube composites: A novel strategy for efficient ORR activity with low Pt content

Bukka, Santhosh; Badam, Rajashekar; Vedarajan, Raman; Matsumi, Noriyoshi

doi:10.1016/j.ijhydene.2019.01.004

Cited by 20 publications

(7 citation statements)

References 38 publications

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“…The bulk materials were compressed bit by bit in the top-down technique, resulting in fine generations of NPs [ 29 ]. Lithography, sputtering, and mechanical techniques such as thermal evaporation, milling and grinding, chemical etching and photo reduction are used to accomplish this [ 30 ]. Major merits, which set them apart for nanoparticle synthesis, include production cost, control over size, and morphology, ensuring overall dimensional stability of the final product and a monodisperse population of higher production enabling industrial level bulk production.…”

Section: Methodsmentioning

confidence: 99%

[Retracted] Fungal‐ and Algal‐Derived Synthesis of Various Nanoparticles and Their Applications

Michael

Singh

Roy

et al. 2022

Bioinorganic Chemistry and Applications

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Nanoparticles synthesis through biological mediated methods with a particular focus on the processes mediated by fungi and algae is discussed, which systematically reviews nanoparticle characterization, composition, synthesis methods, and, lastly but not least, the applications of NPs across five different categories to provide a reference for future research. Most traditional methods to generate nanoparticles have certain limitations, like the toxicity of precursor materials, the need for high-temperature management, and the high cost of synthesis, which ultimately hinders their utility in sectors. Greener synthesis through fungus and algae done through bioreduction by biomolecules or enzymes present in them is low-energy, low-cost, and needs a low-temperature environment, providing a unique technique for the manufacture of various metallic nanoparticles utilized in an array of industries and healthcare.

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Section: Methodsmentioning

confidence: 99%

[Retracted] Fungal‐ and Algal‐Derived Synthesis of Various Nanoparticles and Their Applications

Michael

Singh

Roy

et al. 2022

Bioinorganic Chemistry and Applications

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“…Table shows the mass activity of various catalysts from this study and the references. As seen in the table, our Pt-based catalysts has higher activity compared to other Pt-based catalysts with N-doped carbon from pyromellitic dianhydride and urea, TiO 2 nanotube, XC-72, porous carbon nanofibers from polyacrylonitrile (PAN) and poly(methyl methacrylate) (PMMA), and carbon microspheres from potassium dichloroacetate as supports.…”

Section: Resultsmentioning

confidence: 92%

High Activity of Platinum-Cobalt Supported by Natto-like N-Doped Carbon Sphere as Durable Catalyst for Oxygen Reduction Reaction

et al. 2021

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This study demonstrates a platinum and cobalt alloy (PtCo) supported by natto-like N-doped carbon spheres (n-NCS), denoted as PtCo/n-NCS, showing excellent catalytic activity and high durability for the oxygen reduction reaction (ORR). PtCo/n-NCS demonstrate the electron-transfer number of 3.98 and only the decay of 53 mV on half-wave potential after 30 000 cycles. PtCo/n-NCS contribute a high Pt mass activity of 823.01 mA mg Pt −1 at 0.80 V, compared to Pt/C and PtCo/C with 105.46 and 235.20 mA mg Pt −1 , respectively. n-NCS provide a large surface area to increase NCS for the utilization of PtCo catalysts and a large amount of the graphitic-N structures to enhance the four-electron transfer. Therefore, PtCo/n-NCS have a superior ORR activity, making them the promising catalysts for the ORR.

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“…In the top-down approach, nanoparticles are produced by reducing the size and decomposing the bulk materials into fine particles [23] through various physical and chemical routes such as lithography [24], sputtering [25], thermal evaporation [26], pulsed laser ablation [27], photoreduction techniques [28], chemical etching [29] and mechanical (milling, and grinding) [30]. Nevertheless, the imperfection of the produced surface structure is mentioned as the main disadvantage of this technique [31].…”

Section: Green Synthesis Of Nanoparticles (Nps)mentioning

confidence: 99%

Green Synthesis of Metal Oxides Semiconductors for Gas Sensing Applications

Dadkhah

Tulliani

2022

Sensors

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During recent decades, metal oxide semiconductors (MOS) have sparked more attention in various applications and industries due to their excellent sensing characteristics, thermal stability, abundance, and ease of synthesis. They are reliable and accurate for measuring and monitoring environmentally important toxic gases, such as NO2, NO, N2O, H2S, CO, NH3, CH4, SO2, and CO2. Compared to other sensing technologies, MOS sensors are lightweight, relatively inexpensive, robust, and have high material sensitivity with fast response times. Green nanotechnology is a developing branch of nanotechnology and aims to decrease the negative effects of the production and application of nanomaterials. For this purpose, organic solvents and chemical reagents are not used to prepare metal nanoparticles. On the contrary, the synthesis of metal or metal oxide nanoparticles is done by microorganisms, either from plant extracts or fungi, yeast, algae, and bacteria. Thus, this review aims at illustrating the possible green synthesis of different metal oxides such as ZnO, TiO2, CeO2, SnO2, In2O3, CuO, NiO, WO3, and Fe3O4, as well as metallic nanoparticles doping.

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Photo-generation of ultra-small Pt nanoparticles on carbon-titanium dioxide nanotube composites: A novel strategy for efficient ORR activity with low Pt content

Cited by 20 publications

References 38 publications

[Retracted] Fungal‐ and Algal‐Derived Synthesis of Various Nanoparticles and Their Applications

[Retracted] Fungal‐ and Algal‐Derived Synthesis of Various Nanoparticles and Their Applications

High Activity of Platinum-Cobalt Supported by Natto-like N-Doped Carbon Sphere as Durable Catalyst for Oxygen Reduction Reaction

Green Synthesis of Metal Oxides Semiconductors for Gas Sensing Applications

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