Evolution of Active Oxygen Species Originating from O2 Cleavage over Fe-FER for Application in Methane Oxidation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00569095" target="_blank" >RIV/61388955:_____/23:00569095 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0340418" target="_blank" >https://hdl.handle.net/11104/0340418</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acscatal.2c06099" target="_blank" >10.1021/acscatal.2c06099</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of Active Oxygen Species Originating from O2 Cleavage over Fe-FER for Application in Methane Oxidation

Popis výsledku v původním jazyce

Here, we show a spectroscopic study of the formation and oxidation properties of α-oxygen originating from O2 dissociation over binuclear Fe(II) structure in Fe-ferrierite. The investigation of its formation, stability, and methane oxidation properties toward methanol formation at elevated temperatures was confirmed by in situ FTIR spectroscopy and mass spectrometry. For a deeper insight into the redox properties of Fe centers embedded in ferrierite, Mössbauer and X-ray adsorption spectroscopies were used as complementary methods. In situ FTIR spectroscopy and activity test results recorded at elevated temperatures convenient for potential industrial applications (through-flow reactor, 220 °C) showed that binuclear Fe(II) centers in FER can split O2 and form stable species [Fe(IV)=O]2+ active in three consecutive cycles in methane to methanol oxidation. Those results were confirmed by changes in the values of hyperfine parameters of iron species in ferrierite in Mössbauer spectra and by changes in the Fe K-edge XAS spectrum recorded under redox conditions.

Název v anglickém jazyce

Evolution of Active Oxygen Species Originating from O2 Cleavage over Fe-FER for Application in Methane Oxidation

Popis výsledku anglicky

Here, we show a spectroscopic study of the formation and oxidation properties of α-oxygen originating from O2 dissociation over binuclear Fe(II) structure in Fe-ferrierite. The investigation of its formation, stability, and methane oxidation properties toward methanol formation at elevated temperatures was confirmed by in situ FTIR spectroscopy and mass spectrometry. For a deeper insight into the redox properties of Fe centers embedded in ferrierite, Mössbauer and X-ray adsorption spectroscopies were used as complementary methods. In situ FTIR spectroscopy and activity test results recorded at elevated temperatures convenient for potential industrial applications (through-flow reactor, 220 °C) showed that binuclear Fe(II) centers in FER can split O2 and form stable species [Fe(IV)=O]2+ active in three consecutive cycles in methane to methanol oxidation. Those results were confirmed by changes in the values of hyperfine parameters of iron species in ferrierite in Mössbauer spectra and by changes in the Fe K-edge XAS spectrum recorded under redox conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA19-02901S" target="_blank" >GA19-02901S: Inovativní přístupy pro využití metanu - enzymy inspirované zeolitické katalyzátory</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

ACS Catalysis

ISSN

2155-5435

e-ISSN

2155-5435

Svazek periodika

13

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

3345-3355

Kód UT WoS článku

000944557600001

EID výsledku v databázi Scopus

2-s2.0-85148897545