Electron transfer-mediated enhancement of superoxide radical generation in fenton-like process: Key role of oxygen vacancy-regulated local electron density of cobalt sites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F24%3A00011526" target="_blank" >RIV/46747885:24620/24:00011526 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0926337323011335" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0926337323011335</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcatb.2023.123490" target="_blank" >10.1016/j.apcatb.2023.123490</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electron transfer-mediated enhancement of superoxide radical generation in fenton-like process: Key role of oxygen vacancy-regulated local electron density of cobalt sites

Popis výsledku v původním jazyce

Designing metal oxides with oxygen vacancy (OV) is a prospective strategy for boosted Fenton-like process. However, what OV is, whether OV enhancement increases the catalytic performance, OV-related H2O2 activation, and relationship between OV and ROS or non-radical pathways have not been fully understood. Herein, yolk-shell Co3O4 nanospheres with various OV were fabricated to overcome the above contentious problems and establish a relationship between OV, ROS, and electron transfer in sulfadiazine (SDZ) degradation via H2O2 activation. The results showed that the delocalized electron-rich Co sites around OV with increasing OV allowed the improved conductivity, thereby leading to stronger adsorption and activation of H2O2 to generate more •OH as evidenced by the attenuated adsorption energy and prolonged O-O bond. The subsequent rapid depletion of •OH coupled with the increase in O2•− over time and the emergence of electron transfer from SDZ explored a pathway enhancing O2•− generation for SDZ degradation.

Název v anglickém jazyce

Electron transfer-mediated enhancement of superoxide radical generation in fenton-like process: Key role of oxygen vacancy-regulated local electron density of cobalt sites

Popis výsledku anglicky

Designing metal oxides with oxygen vacancy (OV) is a prospective strategy for boosted Fenton-like process. However, what OV is, whether OV enhancement increases the catalytic performance, OV-related H2O2 activation, and relationship between OV and ROS or non-radical pathways have not been fully understood. Herein, yolk-shell Co3O4 nanospheres with various OV were fabricated to overcome the above contentious problems and establish a relationship between OV, ROS, and electron transfer in sulfadiazine (SDZ) degradation via H2O2 activation. The results showed that the delocalized electron-rich Co sites around OV with increasing OV allowed the improved conductivity, thereby leading to stronger adsorption and activation of H2O2 to generate more •OH as evidenced by the attenuated adsorption energy and prolonged O-O bond. The subsequent rapid depletion of •OH coupled with the increase in O2•− over time and the emergence of electron transfer from SDZ explored a pathway enhancing O2•− generation for SDZ degradation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Applied Catalysis B: Environmental

ISSN

0926-3373

e-ISSN

—

Svazek periodika

343

Číslo periodika v rámci svazku

APR

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

21

Strana od-do

—

Kód UT WoS článku

001115615100001

EID výsledku v databázi Scopus

2-s2.0-85177785697