Inhibition of H2 and O2 Recombination: The Key to a Most Efficient Single-Atom Co-Catalyst for Photocatalytic H2 Evolution from Plain Water

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F22%3A73618736" target="_blank" >RIV/61989592:15640/22:73618736 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/10.1002/adfm.202207849" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/adfm.202207849</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.202207849" target="_blank" >10.1002/adfm.202207849</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Inhibition of H2 and O2 Recombination: The Key to a Most Efficient Single-Atom Co-Catalyst for Photocatalytic H2 Evolution from Plain Water

Popis výsledku v původním jazyce

In the present work, it is shown that anodic TiO2 nanotubes (NTs) can be decorated with Pt, Pd, Rh, and Au single atoms (SAs) by a simple “dark deposition” approach. Such TiO2 NTs with surface trapped noble metal SAs provide a high activity for photocatalytic H2 generation from pure water, i.e., in absence of a sacrificial agent. However, noble metals also act as active centers in the undesired hydrogen back-oxidation (H2 + O2 → H2O), leading to a decrease in the overall photocatalytic H2 production efficiency. Here it is reported that the use of noble metal co-catalysts, in the form of single atoms, can inhibit this recombination. From the different noble-metal SAs investigated, Pd SAs yield the highest H2 production rate of 0.381 µmol h−1 cm−1 at a density of 0.41 × 105 Pd atoms µm−2. Overall, the results provide a path to a highly efficient photocatalytic performance for water splitting by the suppression of the H2/O2 recombination, which can be effectively achieved using Pd in the form of SAs as photocatalytic co-catalysts

Název v anglickém jazyce

Inhibition of H2 and O2 Recombination: The Key to a Most Efficient Single-Atom Co-Catalyst for Photocatalytic H2 Evolution from Plain Water

Popis výsledku anglicky

In the present work, it is shown that anodic TiO2 nanotubes (NTs) can be decorated with Pt, Pd, Rh, and Au single atoms (SAs) by a simple “dark deposition” approach. Such TiO2 NTs with surface trapped noble metal SAs provide a high activity for photocatalytic H2 generation from pure water, i.e., in absence of a sacrificial agent. However, noble metals also act as active centers in the undesired hydrogen back-oxidation (H2 + O2 → H2O), leading to a decrease in the overall photocatalytic H2 production efficiency. Here it is reported that the use of noble metal co-catalysts, in the form of single atoms, can inhibit this recombination. From the different noble-metal SAs investigated, Pd SAs yield the highest H2 production rate of 0.381 µmol h−1 cm−1 at a density of 0.41 × 105 Pd atoms µm−2. Overall, the results provide a path to a highly efficient photocatalytic performance for water splitting by the suppression of the H2/O2 recombination, which can be effectively achieved using Pd in the form of SAs as photocatalytic co-catalysts

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Projekt

<a href="/cs/project/EF15_003%2F0000416" target="_blank" >EF15_003/0000416: Pokročilé hybridní nanostruktury pro aplikaci v obnovitelných zdrojích energie</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ADVANCED FUNCTIONAL MATERIALS

ISSN

1616-301X

e-ISSN

1616-3028

Svazek periodika

32

Číslo periodika v rámci svazku

44

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

7

Strana od-do

"nečíslováno"

Kód UT WoS článku

000843761900001

EID výsledku v databázi Scopus

2-s2.0-85136788587