Carbon nitride boosts the CO2 methanation activity of Ni/CeO2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00142962" target="_blank" >RIV/00216224:14310/25:00142962 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2213343725038497?via%3Dihub#ack0005" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2213343725038497?via%3Dihub#ack0005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jece.2025.119153" target="_blank" >10.1016/j.jece.2025.119153</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Carbon nitride boosts the CO2 methanation activity of Ni/CeO2

Popis výsledku v původním jazyce

Selective CO2 methanation using green H-2 offers a promising approach for tackling both energy and environmental challenges. Herein, a Ni/CeO2 catalyst was synthesized using a one-pot method in the presence of sacrificial C3N4 and evaluated for COQ methanation. The catalyst exhibited a high CO2 conversion of 82.6 % and a CH4 production rate of up to 178 mmol g(cat)(-1) h(-1), with high CH4 selectivity (99.4 %) at a remarkably low temperature of 250 degrees C. Surface characterization techniques, including Raman spectroscopy, XPS, P-31-MAS NMR of adsorbed trimethylphosphine, and CO2-TPD, demonstrate that the addition of C3N4 significantly enhanced the concentration of surface oxygen vacancies and medium-strength basic sites. In situ DRIFTS analysis indicated that CO2 methanation over Ni/CeO2 proceeded via the RWGS+CO hydrogenation and formate pathways, with the former being predominant at low temperatures. The exceptional low-temperature methanation performance of this new catalyst is attributed to the increased density of oxygen vacancies and medium-strength basic sites.

Název v anglickém jazyce

Carbon nitride boosts the CO2 methanation activity of Ni/CeO2

Popis výsledku anglicky

Selective CO2 methanation using green H-2 offers a promising approach for tackling both energy and environmental challenges. Herein, a Ni/CeO2 catalyst was synthesized using a one-pot method in the presence of sacrificial C3N4 and evaluated for COQ methanation. The catalyst exhibited a high CO2 conversion of 82.6 % and a CH4 production rate of up to 178 mmol g(cat)(-1) h(-1), with high CH4 selectivity (99.4 %) at a remarkably low temperature of 250 degrees C. Surface characterization techniques, including Raman spectroscopy, XPS, P-31-MAS NMR of adsorbed trimethylphosphine, and CO2-TPD, demonstrate that the addition of C3N4 significantly enhanced the concentration of surface oxygen vacancies and medium-strength basic sites. In situ DRIFTS analysis indicated that CO2 methanation over Ni/CeO2 proceeded via the RWGS+CO hydrogenation and formate pathways, with the former being predominant at low temperatures. The exceptional low-temperature methanation performance of this new catalyst is attributed to the increased density of oxygen vacancies and medium-strength basic sites.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/EH23_015%2F0008175" target="_blank" >EH23_015/0008175: Inovace České infrastruktury pro integrativní strukturní biologii</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

ISSN

2213-2929

e-ISSN

2213-3437

Svazek periodika

13

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

001584863100003

EID výsledku v databázi Scopus

2-s2.0-105022600953