Platinum surface complexes as precursors for H–O recombination catalysts

In this work, the adsorption of platinum (II, IV) chloride complexes from acidic solutions on silica gel modified with quaternary ammonium salts (QAS) was studied. The uptake of the platinum chloride complexes is caused by the formation of ionic (QAS + ) 2 [PtCl x ] 2− ( x  = 4, 6) associates on the...

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Main Authors: Olesya B Volovenko, Olga A Zaporozhets, Vladyslav V Lisnyak, Olga Yu Boldyrieva
Format: Article
Language:English
Published: SAGE Publishing 2017-09-01
Series:Adsorption Science & Technology
Online Access:https://doi.org/10.1177/0263617417708430
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author Olesya B Volovenko
Olga A Zaporozhets
Vladyslav V Lisnyak
Olga Yu Boldyrieva
author_facet Olesya B Volovenko
Olga A Zaporozhets
Vladyslav V Lisnyak
Olga Yu Boldyrieva
author_sort Olesya B Volovenko
collection DOAJ
description In this work, the adsorption of platinum (II, IV) chloride complexes from acidic solutions on silica gel modified with quaternary ammonium salts (QAS) was studied. The uptake of the platinum chloride complexes is caused by the formation of ionic (QAS + ) 2 [PtCl x ] 2− ( x  = 4, 6) associates on the surface of silica gel. The isotherms of adsorption are fitted by the Langmuir model. The maximum capacity for [PtCl 4 ] 2− and [PtCl 6 ] 2− is 0.99 and 1.13 mmol/g, correspondingly. The respective adsorption constants K L  = 6.8 and 10 × 10 5  l/mol prove the high affinity of the adsorbates to the QAS-modified surface. Platinum metal nanoparticles supported on the surface of the silica gel were prepared by reducing the adsorbed platinum (II, IV) complexes. Such nanoparticles functioning at the moderate temperature regime have demonstrated a reasonable catalytic activity for the hydrogen and oxygen recombination, and an excellent stability over 35 cycles of the reaction.
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institution Kabale University
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2048-4038
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publishDate 2017-09-01
publisher SAGE Publishing
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series Adsorption Science & Technology
spelling doaj-art-a778ca6f25cd4aff81263b726bc3db652025-02-03T10:08:01ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382017-09-013510.1177/0263617417708430Platinum surface complexes as precursors for H–O recombination catalystsOlesya B VolovenkoOlga A ZaporozhetsVladyslav V LisnyakOlga Yu BoldyrievaIn this work, the adsorption of platinum (II, IV) chloride complexes from acidic solutions on silica gel modified with quaternary ammonium salts (QAS) was studied. The uptake of the platinum chloride complexes is caused by the formation of ionic (QAS + ) 2 [PtCl x ] 2− ( x  = 4, 6) associates on the surface of silica gel. The isotherms of adsorption are fitted by the Langmuir model. The maximum capacity for [PtCl 4 ] 2− and [PtCl 6 ] 2− is 0.99 and 1.13 mmol/g, correspondingly. The respective adsorption constants K L  = 6.8 and 10 × 10 5  l/mol prove the high affinity of the adsorbates to the QAS-modified surface. Platinum metal nanoparticles supported on the surface of the silica gel were prepared by reducing the adsorbed platinum (II, IV) complexes. Such nanoparticles functioning at the moderate temperature regime have demonstrated a reasonable catalytic activity for the hydrogen and oxygen recombination, and an excellent stability over 35 cycles of the reaction.https://doi.org/10.1177/0263617417708430
spellingShingle Olesya B Volovenko
Olga A Zaporozhets
Vladyslav V Lisnyak
Olga Yu Boldyrieva
Platinum surface complexes as precursors for H–O recombination catalysts
Adsorption Science & Technology
title Platinum surface complexes as precursors for H–O recombination catalysts
title_full Platinum surface complexes as precursors for H–O recombination catalysts
title_fullStr Platinum surface complexes as precursors for H–O recombination catalysts
title_full_unstemmed Platinum surface complexes as precursors for H–O recombination catalysts
title_short Platinum surface complexes as precursors for H–O recombination catalysts
title_sort platinum surface complexes as precursors for h o recombination catalysts
url https://doi.org/10.1177/0263617417708430
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AT olgaazaporozhets platinumsurfacecomplexesasprecursorsforhorecombinationcatalysts
AT vladyslavvlisnyak platinumsurfacecomplexesasprecursorsforhorecombinationcatalysts
AT olgayuboldyrieva platinumsurfacecomplexesasprecursorsforhorecombinationcatalysts