Highly Active Visible Light-Promoted Ir/g-C3N4 Photocatalysts for the Water Oxidation Reaction Prepared from a Halogen-Free Iridium Precursor | Sciact - CRIS-система Института катализа

Highly Active Visible Light-Promoted Ir/g-C3N4 Photocatalysts for the Water Oxidation Reaction Prepared from a Halogen-Free Iridium Precursor Научная публикация

Журнал

ACS Applied Materials and Interfaces
ISSN: 1944-8244 , E-ISSN: 1944-8252

Вых. Данные

Год: 2022, Том: 14, Номер: 31, Страницы: 35600–35612 Страниц : 13 DOI: 10.1021/acsami.2c07485

Ключевые слова

oxygen evolution reaction, iridium, g-C3N4, visible light, photocatalyst

Авторы

Topchiyan Polina ^1,2 , Vasilchenko Danila ^1,2 , Tkachev Sergey ¹ , Sheven Dmitriy ¹ , Eltsov Ilia ³ , Asanov Igor ¹ , Sidorenko Nikolay ^2,3 , Saraev Andrey ² , Gerasimov Evgeny ² , Kurenkova Anna ² , Kozlova Ekaterina ²

Организации

1	Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Science, 630090 Novosibirsk, Russian Federation
2	Federal Research Center Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
3	Novosibirsk State University, 630090 Novosibirsk, Russian Federation

Информация о финансировании (1)

Российский научный фонд

21-13-00314

A combination of the exceptional stability of fac-[Ir(H2O)3(NO2)3] together with thermolability of nitro and aqua ligands and high solubility in various solvents makes it promising as a brand-new chlorine-free precursor of iridium for the preparation of heterogeneous catalysts. In the current work, a new technique of fac-[Ir(H2O)3(NO2)3] preparation based on hydrothermal treatment of (NH4)3[Ir(NO2)6] was developed. For this purpose, the influence of reaction parameters such as the reaction time, temperature, and pH of the solution on the process of hexanitroiridate salt hydrolysis was investigated. The synthesized fac-[Ir(H2O)3(NO2)3] solution in this optimized way was used for the preparation of the series of Ir/g-C3N4 catalysts, which were evaluated in the water oxidation reaction with NaIO4 utilized as a sacrificial reagent. A 20-fold enhancement of the oxygen evolution reaction (OER) activity was found to take place under visible light (λ = 411 nm) illumination of the systems. The highest rate of the photoinduced OER per iridium center was achieved by the Ir0.005/g-C3N4 (air, 400°C) catalyst with an exceptional turnover frequency value of 967 min–1 approaching the activity of known homogeneous iridium OER catalysts. The leaching experiments have shown that aquated Ir species are generated in a solution after prolonged functioning of the catalysts. Despite this, in the closed system the photodriven OER activity persists at a steady-state level evidencing an equilibrium achieved between dissolved and anchored Ir species forming catalytic tandem with the g-C3N4.

Topchiyan P. , Vasilchenko D. , Tkachev S. , Sheven D. , Eltsov I. , Asanov I. , Sidorenko N. , Saraev A. , Gerasimov E. , Kurenkova A. , Kozlova E.
Highly Active Visible Light-Promoted Ir/g-C3N4 Photocatalysts for the Water Oxidation Reaction Prepared from a Halogen-Free Iridium Precursor
ACS Applied Materials and Interfaces. 2022. V.14. N31. P.35600–35612. DOI: 10.1021/acsami.2c07485 WOS Scopus РИНЦ CAPlus PMID OpenAlex

Поступила в редакцию:	28 апр. 2022 г.
Принята к публикации:	19 июл. 2022 г.
Опубликована online:	26 июл. 2022 г.
Опубликована в печати:	10 авг. 2022 г.

Web of science:	WOS:000842705700001
Scopus:	2-s2.0-85135768520
РИНЦ:	53745410
Chemical Abstracts:	2022:1942001
PMID (PubMed):	35881890
OpenAlex:	W4288036435

БД	Цитирований
Scopus	9
Web of science	8
РИНЦ	11
OpenAlex	10