TY - JOUR

T1 - Study of Composite Photocatalysts Obtained by Photodeposition of Platinum on Layered Oxide HCa2Nb3O10 and Its Inorganic–Organic Hybrids

AU - Davydov, N.A.

AU - Silyukov, O.I.

AU - Rodionov, I.A.

AU - Kurnosenko, S.A.

AU - Gubanova, A.N.

AU - Kulagina, A.V.

AU - Zvereva, I.A.

N1 - Export Date: 09 March 2026; Cited By: 0; Correspondence Address: O.I. Silyukov; Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, 199034, Russian Federation; email: oleg.silyukov@spbu.ru; CODEN: MOLEF

PY - 2026/2/16

Y1 - 2026/2/16

N2 - In recent decades, layered perovskite-like oxides have been intensively investigated as prominent photocatalysts for water splitting as a method of hydrogen production. In many previous papers, it was shown that deposition of platinum on an oxide sample dramatically increases photocatalytic activity. Nevertheless, little research was conducted to reveal the localisation of platinum in layered oxides; either it is located on the surface or in the interlayer space. In the present work, an attempt to answer this question is made. An HCa2Nb3O10 layered perovskite-like oxide was modified with platinum by photoreduction of H2PtCl6 and then was intercalated with n-alkylamines (R = Me, Bu, Oc). Moreover, another set of samples were prepared by intercalating the amines first into HCa2Nb3O10, followed by Pt deposition. Besides conventional methods for sample characterisation, we measured the kinetics of Pt dissolution during aqua regia etching of the samples, hoping that the rate of platinum dissolution would provide some information about its localisation. It was shown that in HCa2Nb3O10 modified with platinum, less than 20% of the platinum is located on the surface, and that in the case of HCa2Nb3O10 intercalated with amines, an even smaller amount of platinum attaches to the surface. Moreover, Pt in HCa2Nb3O10 intercalated with amines was found to be significantly more stable against aqua regia treatment than in HCa2Nb3O10 decorated with platinum directly. © 2026 by the authors.

AB - In recent decades, layered perovskite-like oxides have been intensively investigated as prominent photocatalysts for water splitting as a method of hydrogen production. In many previous papers, it was shown that deposition of platinum on an oxide sample dramatically increases photocatalytic activity. Nevertheless, little research was conducted to reveal the localisation of platinum in layered oxides; either it is located on the surface or in the interlayer space. In the present work, an attempt to answer this question is made. An HCa2Nb3O10 layered perovskite-like oxide was modified with platinum by photoreduction of H2PtCl6 and then was intercalated with n-alkylamines (R = Me, Bu, Oc). Moreover, another set of samples were prepared by intercalating the amines first into HCa2Nb3O10, followed by Pt deposition. Besides conventional methods for sample characterisation, we measured the kinetics of Pt dissolution during aqua regia etching of the samples, hoping that the rate of platinum dissolution would provide some information about its localisation. It was shown that in HCa2Nb3O10 modified with platinum, less than 20% of the platinum is located on the surface, and that in the case of HCa2Nb3O10 intercalated with amines, an even smaller amount of platinum attaches to the surface. Moreover, Pt in HCa2Nb3O10 intercalated with amines was found to be significantly more stable against aqua regia treatment than in HCa2Nb3O10 decorated with platinum directly. © 2026 by the authors.

KW - hydrogen production

KW - intercalation

KW - layered oxides

KW - perovskite-like oxide

KW - photocatalysis

KW - photodeposition

KW - platinum

KW - aliphatic amine

KW - amine

KW - hydrogen

KW - oxide

KW - perovskite

KW - article

KW - dissolution

KW - hybrid

KW - kinetics

KW - water splitting

UR - https://www.mendeley.com/catalogue/6ba119d7-f839-3d40-89b3-6e5951b5a05b/

U2 - 10.3390/molecules31040685

DO - 10.3390/molecules31040685

M3 - статья

C2 - 41752462

VL - 31

JO - Molecules

JF - Molecules

SN - 1420-3049

IS - 4

ER -