PdPt nanoparticles were prepared by oil-bath heating in ethylene glycol (EG, Sigma-Aldrich, St. Louis, MO, USA) using a one-step reduction method. Briefly, 3 mL of EG were preheated until the temperature was stabilized at 160 °C in a 3-neck round bottom flask. Over the stirred EG, 1.5 mL of 50 mM chloroplatinic acid hexahydrate (H2PtCl6·6H2O, Sigma-Aldrich, St. Louis, MO, USA) in EG, 1.5 mL of 50 mM potassium tetrachloropalladate (K2PdCl4, Sigma-Aldrich, St. Louis, MO, USA) in EG and 6 mL of 100 mM polyvinylpyrrolidone (PVP, Sigma-Aldrich, St. Louis, MO, USA) in EG were added slowly in aliquots of 200 µL (H2PtCl6·6H2O and K2PdCl4) and 400 µL (PVP), respectively, each 2.5 min until the volume of the precursor and surfactant was completed, then the mixture was kept on stirring at 160 °C for 2 h. The cleaning process of nanoparticles was performed both with hexane (Sigma-Aldrich, St. Louis, MO, USA) and deionized water (COCIBA, Querétaro, Mexico) in ultrasound baths and this process was repeated for several times.
Chloroplatinic acid hexahydrate h2ptcl6 6h2o
Manufactured by Merck Group
Sourced in United States, Germany
Chloroplatinic acid hexahydrate (H2PtCl6·6H2O) is a chemical compound that contains platinum. It is a yellow, crystalline solid that is soluble in water and organic solvents. The compound is often used as a catalyst or as a precursor for the preparation of other platinum-containing compounds.
Automatically generated - may contain errors
Lab products found in correlation
Potassium tetrachloropalladate k2pdcl4, by Merck Group (1 mentions)
K2pdcl4, by Merck Group (1 mentions)
Polyvinylpyrrolidone pvp, by Merck Group (1 mentions)
Hexane, by Merck Group (1 mentions)
Thiourea ch4n2s, by Merck Group (1 mentions)
Ethyl alcohol c2h5oh, by Daejung Chemicals (1 mentions)
Sulfuric acid h2so4, by Avantor (1 mentions)
4 protocols using chloroplatinic acid hexahydrate h2ptcl6 6h2o
1
One-Step Synthesis of PdPt Nanoparticles
2
Synthesis and Hydrogen Evolution Catalysts
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All chemicals in the experiments were used without further purification. All catalyst syntheses and hydrogen evolution reactions were performed with deionized (DI) water. Thiourea (CH4N2S, ≥99%), triethanolamine (TEOA, C6H15NO3, 99%), and chloroplatinic acid hexahydrate (H2PtCl6.6H2O) were purchased from Sigma-Aldrich (Gyeonggi, Korea). Ethyl alcohol (C2H5OH, 99.9%) was obtained from Daejung Chemicals and Metals Co., Ltd. (Gyeonggi, Korea).
3
Flexible Dissolved Oxygen Sensor Fabrication
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Flexible DO sensors were produced by electrodeposition on a platinum (Pt) layer, followed by the deposition on nickel (Ni) and Pt nanoparticles. Figure S3 presents a schematic diagram illustrating the fabrication process for the DO sensor on flexible Au electrodes. Pt deposition was performed using a dc power supply, set at 0.01 mA/cm2 for 3 min. The deposition bath contained a precursor solution of 0.035 M chloroplatinic acid hexahydrate (H2PtCl6·6H2O; Sigma-Aldrich) and 0.5 M sulfuric acid (H2SO4; J.T.Baker). Subsequent electrodeposition of Ni/Pt nanoparticles onto the Pt layer used a three-electrode potentiostat, immersing the electrode in the respective precursor solutions. A current density of −3 mA/cm2 for 5 min was applied for Ni deposition from a plating solution (Sigma-Aldrich), and a potential sweep from −0.4 to 1.0 V at 100 mV/s in three segments was used for Pt deposition against a commercial Ag/AgCl reference electrode. A Nafion layer was then applied to the surface and allowed to air-dry for 30 min. For surface functionalization, a hydrogel consisting of poly(MPC-co-DMA) was introduced as a gas-permeable layer.
4
Thermal Decomposition of Pt-Ir Catalyst
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The support materials were pretreated in a 12 M HCl (Alfa-Aesar, Germany) solution at 85 °C for 3 min. Subsequently, they were rinsed with H2O and stored in a vacuum oven at 50 °C overnight. The coating solution for the thermal decomposition method consists of Pt50Ir50. The platinum salt (chloroplatinic acid hexahydrate, H2PtCl6·6H2O, Sigma-Aldrich, Germany) and iridium salt (hydrogen hexachloroiridate(IV) hydrate, H2IrCl6·xH2O, Sigma-Aldrich, Germany) were dissolved in 1-butanol (>99.5%, Carl Roth, Germany). The resulting 3 wt % precursor solutions were mixed 1:1 to produce the Pt50Ir50 coating solution. The targeted loading for the catalyst was 2 mg·cm−2 of salt based on macroscopic sample area. Only 1 cm2 of the support material was dipped into the well-mixed coating solution for 3 min. Subsequently, the sample was placed in an oven at 90 °C for 20 min. Based on the weight gain these steps were repeated until the desired loading was reached. Subsequently, the sample was calcinated in the oven at 450 °C for 60 min under synthetic air.
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