Synthesis of Pt nanoparticles as catalysts of oxygen reduction with microbubble-assisted low-voltage and low-frequency solution plasma processing

Horiguchi, Genki; Chikaoka, Yu; Shiroishi, Hidenobu; Kosaka, Shinpei; Saito, Morihiro; Kameta, Naohiro; Matsuda, Naoki

doi:10.1016/j.jpowsour.2018.02.017

Cited by 14 publications

(13 citation statements)

References 39 publications

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“…Meanwhile, the mass activity of PtPd/KB-2 after 300 cycles can reach 43%. In 2018, Horiguchi et al [31] designed a SPS mobile cell, which can continuously add Vulcan XC72R to the solution containing Pt to prepare Pt/XC72 electrocatalysts, providing a new route for the continuous production of electrocatalysts.…”

Section: Noble Metal Electrocatalystsmentioning

confidence: 99%

A Review on the Promising Plasma-Assisted Preparation of Electrocatalysts

Liu

et al. 2019

Nanomaterials

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Electrocatalysts are becoming increasingly important for both energy conversion and environmental catalysis. Plasma technology can realize surface etching and heteroatom doping, and generate highly dispersed components and redox species to increase the exposure of the active edge sites so as to improve the surface utilization and catalytic activity. This review summarizes the recent plasma-assisted preparation methods of noble metal catalysts, non-noble metal catalysts, non-metal catalysts, and other electrochemical catalysts, with emphasis on the characteristics of plasma-assisted methods. The influence of the morphology, structure, defect, dopant, and other factors on the catalytic performance of electrocatalysts is discussed.

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Section: Noble Metal Electrocatalystsmentioning

confidence: 99%

A Review on the Promising Plasma-Assisted Preparation of Electrocatalysts

Liu

et al. 2019

Nanomaterials

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“…X-ray photoelectron spectroscopy (XPS) indicated that the surface of the PtNPs is partly covered by PtO and Pt(OH) 2 , suggesting that the aqueous-dispersion behavior of PtNPs is attributable to their hydrophilic O and OH groups. 45 We predicted that if aqueousdispersed PtNPs can be immobilized directly onto CNM surfaces by noncovalent functionalization, the resulting PtNP/ CNM composites would form aqueous suspensions. We also hypothesized that aqueous suspensions of PtNP/CNM could be used as composite inks for fabricating solution-processed electrocatalysts for PEM electrolyzers.…”

Section: ■ Introductionmentioning

confidence: 99%

“…We also investigated the formation of aqueous dispersions of the resulting PtNPs. X-ray photoelectron spectroscopy (XPS) indicated that the surface of the PtNPs is partly covered by PtO and Pt(OH) 2 , suggesting that the aqueous-dispersion behavior of PtNPs is attributable to their hydrophilic O and OH groups . We predicted that if aqueous-dispersed PtNPs can be immobilized directly onto CNM surfaces by noncovalent functionalization, the resulting PtNP/CNM composites would form aqueous suspensions.…”

Section: Introductionmentioning

confidence: 99%

Aqueous Suspensions of Carbon Nanomaterials with Platinum Nanoparticles for Solution-Processed Hydrogen-Producing Electrocatalysts

Metawea,

Nara,

Murakami

et al. 2023

ACS Appl. Nano Mater.

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Proton exchange membrane (PEM) water electrolysis is attracting attention as a promising method for producing clean hydrogen (H2) without emitting carbon dioxide. H2 is produced by the reduction of protons at the cathode in a PEM electrolyzer. Platinum on carbon (Pt/C) is extensively used as a cathodic electrocatalyst; however, the aggregation of Pt in Pt/C necessitates high loading to maintain catalytic activity. Therefore, the development of efficient H2 production electrocatalysts with low Pt loadings is necessary. Herein, we report the preparation of electrocatalysts consisting of solution-processed platinum nanoparticle (PtNP)/carbon nanomaterial (CNM) composites using surfactant-free aqueous-dispersed PtNPs as a dispersant for CNMs. Direct aqueous suspension by PtNPs through noncovalent functionalization occurs universally with single-walled carbon nanotubes (SWCNTs), graphene, and acetylene black, yielding the respective composites. In particular, the PtNP/SWCNT nanocomposite electrocatalyst with a PtNP loading of 6 μgPt cm–2 exhibited a high mass activity of 89,300 A gPt –1 at 2.0 V, which is 270 times higher than that of Pt/C (324 A gPt –1 at 2.0 V) with a Pt loading of 2.8 mgPt cm–2. Furthermore, a PEM electrolyzer containing this electrocatalyst exhibited a Faradaic efficiency of 99% and operated continuously for 150 h at 100 mA cm–2 at an estimated cost of US$5.3/(kg H2). Our findings are promising in terms of not only establishing a methodology for reducing PtNP loading to the microgram order but also demonstrating the practical feasibility of H2-production electrocatalysts for PEM electrolyzers.

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“…e microplasma glow discharge method is used to synthesize mainly noble metal nanoparticles [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Studies in recent years indicate the possibility of obtaining nanoparticles from nonferrous metals [31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Microplasma Synthesis of Antibacterial Active Silver Nanoparticles in Sodium Polyacrylate Solutions

Shepida

Кuntyi

Sukhatskiy

et al. 2021

Bioinorganic Chemistry and Applications

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The great demand for functional, particularly biologically active, metal nanoparticles has led to the search for technologically effective, green, and controlled methods of synthesizing these metal nanoparticles. Plasma glow discharge is one of the most promising techniques in this direction. The results of studies based on the synthesis of colloidal solutions of stabilized silver nanoparticles (AgNPs) by the microplasma method in solutions of a nontoxic surfactant sodium polyacrylate (NaPA) are presented. It is shown that AgNPs with a size of 2–20 nm are formed in solutions of 0.05–0.2 mmol⋅L−1 AgNO3 + 5 g⋅L−1 NaPA at U = 250 V by tungsten cathode plasma glow discharge. At 20°C, the yellow solutions are formed with λmax ≈ 410 nm, which are stable during long-term storage. It was found that the process of AgNPs formation corresponds to a first-order reaction on the AgNO3 concentration. Its value has little effect on the geometry of nanoparticles, so the Ag(I) concentration in solution is one of the main factors influencing the rate of microplasma synthesis of AgNPs. The antimicrobial activity of synthesized AgNPs solutions against strains of Escherichia coli, Staphylococcus aureus, and Candida albicans was established.

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Synthesis of Pt nanoparticles as catalysts of oxygen reduction with microbubble-assisted low-voltage and low-frequency solution plasma processing

Cited by 14 publications

References 39 publications

A Review on the Promising Plasma-Assisted Preparation of Electrocatalysts

A Review on the Promising Plasma-Assisted Preparation of Electrocatalysts

Aqueous Suspensions of Carbon Nanomaterials with Platinum Nanoparticles for Solution-Processed Hydrogen-Producing Electrocatalysts

Microplasma Synthesis of Antibacterial Active Silver Nanoparticles in Sodium Polyacrylate Solutions

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