Topic
Phosphotungstic acid
About: Phosphotungstic acid is a research topic. Over the lifetime, 1925 publications have been published within this topic receiving 38059 citations. The topic is also known as: Phosphowolframic acid.
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TL;DR: In this article, a dye-sensitized solar cells (DSSCs) based on phosphotungstic acid-TiO2 composites and WO3 nanoparticle incorporated TiO2 photoanodes were successfully constructed.
44 citations
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TL;DR: In this article, a composite material HPW/NH 2 -Al 2 O 3 was successfully prepared by immobilization of phosphotungstic acid H 3 PW 12 O 40 (HPW) on the surface of amino functionalized spherical millimeter-sized mesoporous γ-Al 2O 3 beads.
43 citations
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TL;DR: In this article, the hydrogen evolution reaction (HER) was used to test electrocatalytic activities of these nanocomposite modified electrodes, which was attributed to an interaction between these species.
Abstract: Poly(amidoamine) dendrimer (Generation-4) encapsulated platinum nanoparticles (PtNP-PAMAM) were prepared and used to fabricate nanocomposites with Keggin-type phosphotungstic acid (PW12O403−) using a layer by layer electrostatic assembly technique. Indium tin oxide (ITO) electrodes, which were first modified with a monolayer of 3-aminopropyl triethoxysilane (3-APTES), were used as substrates for assembly of the PW12O403− monolayer. Nanocomposites were then fabricated by depositing PtNP-PAMAM on the monolayer of PW12O403−. The amount of PtNP-PAMAM deposited was controlled by using different concentrations of PtNP-PAMAM diluted in 0.1 M H2SO4 solution. The hydrogen evolution reaction (HER) was used to test electrocatalytic activities of these nanocomposite modified electrodes. Modification of ITO|3-APTES with PW12O403− |PtNP-PAMAM showed significantly higher electrocatalytic activities toward the HER than electrodes modified with either PW12O403− or PtNP-PAMAM alone. The electrocatalytic activities were found to depend on the composition of PtNP-PAMAM and PW12O403− on electrode surfaces, which was attributed to an interaction between these species. Heat treatment of ITO|3-APTES|PW12O403− |PtNP-PAMAM electrodes at 200 °C produced significantly higher electrocatalytic activities, which supported the suggestion of an interaction.
43 citations
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TL;DR: In this paper, an HPW-PDMAEMA-SiO2 (phosphotungstic acid (HPW); poly-N,N-dimethylaminoethyl methacrylate (PDMAEAM)) catalyst was successfully synthesized.
Abstract: In the study, an HPW–PDMAEMA–SiO2 (phosphotungstic acid (HPW); poly-N,N-dimethylaminoethyl methacrylate (PDMAEAM)) catalyst was successfully synthesized. The synthesized HPW–PDMAEMA–SiO2 catalyst was characterized via XRD, TEM, FT-IR, TGA, and ICP-AES. The results show that the HPW active species retained its Keggin structure after immobilizing into polymer brushes. At optimal reaction conditions, the oxidative desulfurization conversion of dibenzothiophene reached 100%, and there was no significant catalytic performance decrease after six recycles. The excellent recoverability of the catalyst was attributed to the decreased leaching of the HPW active species caused by the strong interaction between the negative [PW12O40]3− ions and positive ammonium ions in the PDMAEMA polymer brushes.
43 citations
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TL;DR: A nanotubular composite of TiO 2 and WO 3 was synthesized via anodic oxidation of titanium in a single-step process using phosphotungstic acid as the tungsten source.
43 citations