The effect of imidazolium ionic liquid on the morphology of Pt nanoparticles deposited on the surface of SrTiO3 and photoactivity of Pt–SrTiO3 composite in the H2 generation reaction

Julia Zwara; Marta Paszkiewicz-Gawron; Justyna Łuczak; Anna Pancielejko; Wojciech Lisowski; Grzegorz Trykowski; Adriana Zaleska-Medynska; Ewelina Grabowska

doi:10.1016/j.ijhydene.2019.08.094

The effect of imidazolium ionic liquid on the morphology of Pt nanoparticles deposited on the surface of SrTiO3 and photoactivity of Pt–SrTiO3 composite in the H2 generation reaction

Abstract

Photocatalytic water splitting has great potential in solar-hydrogen production as a low-cost and environmentally friendly method. Different unique techniques used to obtain photocatalysts with various modifications to improve H2 generation have been introduced. In the present work, SrTiO3 was successfully synthesized via the solvothermal method in the presence of ionic liquid (IL) - 1-butyl-3-methylimidazolium bromide ([BMIM][Br]) followed by surface decoration with Pt particles using the photodeposition method. The effect of the noble metal content and presence of IL on the morphology, optical and surface properties of SrTiO3, thereby the effectiveness of hydrogen generation, has been thoroughly examined and presented. Unexpectedly, the presence of [BMIM][Br] at the SrTiO3 surface affected the interaction between the semiconductor surface and platinum particles formed throughout photodeposition. Platinum particles at the surface of SrTiO3_IL were found to be in the form of 2D clusters with a size of 1 nm. In comparison, Pt deposited on SrTiO3 photocatalyst without application of IL created larger, three-dimensional structures with a diameter exceeding 5 nm. This is the reason why the total amount of platinum deposited on the SrTiO3_IL sample is smaller than that on SrTiO3 and justifies a higher efficiency of hydrogen generation of Pt modified SrTiO3 photocatalyst in comparison to SrTiO3 prepared in the presence of IL. The mechanism of H2 generation in the water-splitting reaction in the presence of SrTiO3_Pt photocatalyst was discussed.

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Authors (8)

Julia Zwara
Marta Paszkiewicz-Gawron dr inż.
Justyna Łuczak dr hab. inż.
Anna Pancielejko
Wojciech Lisowski Dr.
Grzegorz Trykowski doktor
Adriana Zaleska-Medynska Prof. dr hab. inż.
Ewelina Grabowska Dr.

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Articles

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artykuły w czasopismach

Published in:

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY no. 44, pages 26308 - 26321,
ISSN: 0360-3199

Language:

English

Publication year:

2019

Bibliographic description:

Zwara J., Paszkiewicz-Gawron M., Łuczak J., Pancielejko A., Lisowski W., Trykowski G., Zaleska-Medynska A., Grabowska E.: The effect of imidazolium ionic liquid on the morphology of Pt nanoparticles deposited on the surface of SrTiO3 and photoactivity of Pt–SrTiO3 composite in the H2 generation reaction// INTERNATIONAL JOURNAL OF HYDROGEN ENERGY -Vol. 44,iss. 48 (2019), s.26308-26321

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