Promotional Effect of Manganese on Selective Catalytic Reduction of NO by CO in the Presence of Excess O-2 over M@La-Fe/AC (M = Mn, Ce) Catalyst

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F20%3A43960932" target="_blank" >RIV/49777513:23640/20:43960932 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62243136:_____/20:N0000050

Výsledek na webu

<a href="https://doi.org/10.3390/catal10111322" target="_blank" >https://doi.org/10.3390/catal10111322</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/catal10111322" target="_blank" >10.3390/catal10111322</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Promotional Effect of Manganese on Selective Catalytic Reduction of NO by CO in the Presence of Excess O-2 over M@La-Fe/AC (M = Mn, Ce) Catalyst

Popis výsledku v původním jazyce

The catalytic performance of a series of La-Fe/AC catalysts was studied for the selective catalytic reduction (SCR) of NO by CO. With the increase in La content, the Fe2+/Fe3+ratio and amount of surface oxygen vacancies (SOV) in the catalysts increased; thus the catalytic activity improved. Incorporating the promoters to La3-Fe1/active carbon (AC) catalyst could affect the catalyst activity by changing the electronic structure. The increase in Fe2+/Fe3+ratio after the promoter addition is possibly due to the extra synergistic interaction of M (Mn and Ce) and Fe through the redox equilibrium of M(3+)+ Fe(3+)↔M(4+)+ Fe(2+). This phenomenon could have improved the redox cycle, enhanced the SOV formation, facilitated NO decomposition, and accelerated the CO-SCR process. The presence of O2 enhanced the formation of the C(O) complex and improved the activation of the metal site. Mn@La3-Fe1/AC catalyst revealed an excellent NO conversion of 93.8% at 400 °C in the presence of 10% oxygen. The high catalytic performance of MnOx and double exchange behavior of Mn3+and Mn4+ can increase the number of SOV and improve the catalytic redox properties.

Název v anglickém jazyce

Promotional Effect of Manganese on Selective Catalytic Reduction of NO by CO in the Presence of Excess O-2 over M@La-Fe/AC (M = Mn, Ce) Catalyst

Popis výsledku anglicky

The catalytic performance of a series of La-Fe/AC catalysts was studied for the selective catalytic reduction (SCR) of NO by CO. With the increase in La content, the Fe2+/Fe3+ratio and amount of surface oxygen vacancies (SOV) in the catalysts increased; thus the catalytic activity improved. Incorporating the promoters to La3-Fe1/active carbon (AC) catalyst could affect the catalyst activity by changing the electronic structure. The increase in Fe2+/Fe3+ratio after the promoter addition is possibly due to the extra synergistic interaction of M (Mn and Ce) and Fe through the redox equilibrium of M(3+)+ Fe(3+)↔M(4+)+ Fe(2+). This phenomenon could have improved the redox cycle, enhanced the SOV formation, facilitated NO decomposition, and accelerated the CO-SCR process. The presence of O2 enhanced the formation of the C(O) complex and improved the activation of the metal site. Mn@La3-Fe1/AC catalyst revealed an excellent NO conversion of 93.8% at 400 °C in the presence of 10% oxygen. The high catalytic performance of MnOx and double exchange behavior of Mn3+and Mn4+ can increase the number of SOV and improve the catalytic redox properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

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

2020

Kód důvěrnosti údajů

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

Název periodika

CATALYSTS

ISSN

2073-4344

e-ISSN

—

Svazek periodika

10

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

19

Strana od-do

"NESTRÁNKOVÁNO"

Kód UT WoS článku

000592740400001

EID výsledku v databázi Scopus

2-s2.0-85096209055