Pt Single Atoms on TiO2 Can Catalyze Water Oxidation in Photoelectrochemical Experiments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F24%3A73626022" target="_blank" >RIV/61989592:15640/24:73626022 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/24:10255046

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/jacs.4c03319" target="_blank" >https://pubs.acs.org/doi/10.1021/jacs.4c03319</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jacs.4c03319" target="_blank" >10.1021/jacs.4c03319</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pt Single Atoms on TiO2 Can Catalyze Water Oxidation in Photoelectrochemical Experiments

Popis výsledku v původním jazyce

Photoelectrochemical water splitting on n-type semiconductors is highly dependent on catalysis of the rate-determining reaction of O-2 evolution. Conventionally, in electrochemistry and photoelectrochemistry O-2 evolution is catalyzed by metal oxide catalysts like IrO2 and RuO2, whereas noble metals such as Pt are considered unsuitable for this purpose. However, our study finds that Pt, in its single-atom form, exhibits exceptional cocatalytic properties for photoelectrochemical water oxidation on a TiO2 photoanode, in contrast to Pt in a nanoparticle form. The decoration of Pt single atoms onto TiO2 yields a remarkable current density of 5.89 mA cm(-2) at 1.23 V-RHE, surpassing bare TiO2 (or Pt nanoparticle decorated TiO2) by 2.52 times. Notably, this enhancement remains consistent over a wide pH range. By accompanying theoretical work, we assign this significant enhancement to an improved charge transfer and separation efficiency along with accelerated kinetics in the oxygen evolution reaction facilitated by the presence of Pt single atoms on the TiO2 surface.

Název v anglickém jazyce

Pt Single Atoms on TiO2 Can Catalyze Water Oxidation in Photoelectrochemical Experiments

Popis výsledku anglicky

Photoelectrochemical water splitting on n-type semiconductors is highly dependent on catalysis of the rate-determining reaction of O-2 evolution. Conventionally, in electrochemistry and photoelectrochemistry O-2 evolution is catalyzed by metal oxide catalysts like IrO2 and RuO2, whereas noble metals such as Pt are considered unsuitable for this purpose. However, our study finds that Pt, in its single-atom form, exhibits exceptional cocatalytic properties for photoelectrochemical water oxidation on a TiO2 photoanode, in contrast to Pt in a nanoparticle form. The decoration of Pt single atoms onto TiO2 yields a remarkable current density of 5.89 mA cm(-2) at 1.23 V-RHE, surpassing bare TiO2 (or Pt nanoparticle decorated TiO2) by 2.52 times. Notably, this enhancement remains consistent over a wide pH range. By accompanying theoretical work, we assign this significant enhancement to an improved charge transfer and separation efficiency along with accelerated kinetics in the oxygen evolution reaction facilitated by the presence of Pt single atoms on the TiO2 surface.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

ISSN

0002-7863

e-ISSN

1520-5126

Svazek periodika

146

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

"16363 "- 16368

Kód UT WoS článku

001242751100001

EID výsledku v databázi Scopus

2-s2.0-85195790402