Tuning CO2 reduction selectivity via structural doping of TiO2 photocatalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73628039" target="_blank" >RIV/61989592:15640/25:73628039 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27710/25:10256954 RIV/61989100:27640/25:10256954

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2212982024003433?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2212982024003433?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcou.2024.103008" target="_blank" >10.1016/j.jcou.2024.103008</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tuning CO2 reduction selectivity via structural doping of TiO2 photocatalysts

Popis výsledku v původním jazyce

This study explores the effects of various structural dopants on TiO₂ to enhance selectivity of reaction products in photocatalytic CO₂ reduction. Specifically, the impacts of nitrogen doping, platinum surface doping, and self-doping with Ti³ ⁺ ions (via oxygen vacancies in reduced TiO₂-x) were investigated. X-ray diffraction confirmed the anatase phase, with crystal sizes ranging from 24 to 27 nm. High-resolution transmission electron microscopy revealed uniformly distributed active sites on platinum-doped TiO₂ surfaces. Nitrogen doping selectively stabilized oxygen vacancies, enhancing CO production, while platinum loading acted as an electron trap, improving charge separation and promoting the deeper reduction of CO₂ to CH₄. Self-doping with Ti³ ⁺ ions introduced structural defects that further influenced photocatalytic dynamics. X-ray photoelectron spectroscopy and electron paramagnetic resonance analyses demonstrated how these dopants reorganize surface defects, thereby fine-tuning product selectivity. Variations in dopant-to-oxygen ratios and smaller crystallites led to different yields of CO and CH₄, emphasizing the importance of dopant type and distribution. Stability tests confirmed consistent photocatalytic activity across multiple cycles, highlighting the robustness and reusability of the modified materials. This study provides valuable insights into the interplay between dopants, crystal structure, and photocatalytic performance, offering new directions for the design of tailored catalysts for selective CO₂ reduction.

Název v anglickém jazyce

Tuning CO2 reduction selectivity via structural doping of TiO2 photocatalysts

Popis výsledku anglicky

This study explores the effects of various structural dopants on TiO₂ to enhance selectivity of reaction products in photocatalytic CO₂ reduction. Specifically, the impacts of nitrogen doping, platinum surface doping, and self-doping with Ti³ ⁺ ions (via oxygen vacancies in reduced TiO₂-x) were investigated. X-ray diffraction confirmed the anatase phase, with crystal sizes ranging from 24 to 27 nm. High-resolution transmission electron microscopy revealed uniformly distributed active sites on platinum-doped TiO₂ surfaces. Nitrogen doping selectively stabilized oxygen vacancies, enhancing CO production, while platinum loading acted as an electron trap, improving charge separation and promoting the deeper reduction of CO₂ to CH₄. Self-doping with Ti³ ⁺ ions introduced structural defects that further influenced photocatalytic dynamics. X-ray photoelectron spectroscopy and electron paramagnetic resonance analyses demonstrated how these dopants reorganize surface defects, thereby fine-tuning product selectivity. Variations in dopant-to-oxygen ratios and smaller crystallites led to different yields of CO and CH₄, emphasizing the importance of dopant type and distribution. Stability tests confirmed consistent photocatalytic activity across multiple cycles, highlighting the robustness and reusability of the modified materials. This study provides valuable insights into the interplay between dopants, crystal structure, and photocatalytic performance, offering new directions for the design of tailored catalysts for selective CO₂ reduction.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EH22_008%2F0004587" target="_blank" >EH22_008/0004587: Technologie za hranicí nanosvěta</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of CO2 Utilization

ISSN

2212-9820

e-ISSN

2212-9839

Svazek periodika

91

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

nestránkováno

Kód UT WoS článku

001413343800001

EID výsledku v databázi Scopus

2-s2.0-85213033520