Role of Ruthenium in Modified CeNi1–xRuxO3 Perovskite Catalysts for the Bireforming of Methane DOI
Dunpin Hong, Ba Long, Ha Cam Anh

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 31, 2024

The study on modifying catalytic properties by partially substituting nickel with ruthenium the perovskite precursor CeNiO3 has been conducted in this work. Catalysts were synthesized using a coprecipitation method, and their physicochemical evaluated through analytical techniques, including X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), Brunauer–Emmett–Teller (BET) analysis, scanning electron microscopy (SEM), high-resolution transmission (HR-TEM), H2 temperature-programmed reduction (H2-TPR), CO2 desorption (CO2-TPD), Raman spectroscopy. Additionally, thermogravimetric analysis coupled differential calorimetry (TGA-DSC) XRD employed to assess carbon deposition coke type catalyst after 100 h TOS. All ruthenium-modified CeNi1–xRuxO3 (x = 0.01, 0.05, 0.10) catalysts showed good activity CH4 conversion rates exceeding 90% at 700 °C. Ru modification facilitated incorporation of Ni into ceria lattice, resulting formation Ru–O–Ce Ni–O–Ce bonds, which significantly enhanced catalyst's sintering resistance reducibility. Moreover, Ru-modified exhibited considerable increase specific surface area, reduced crystallite size, emergence highly active basic sites, an oxygen vacancies. However, excessively loading lowers dispersion, metal agglomeration decreased activity. optimal substitution ratio was determined be 0.05. Catalyst CeNi0.95Ru0.05O3 highest BRM both approximately 95% °C, compared 88 90%, respectively, for catalysts. maintained stability reaction 3 times lower accumulation rate bare perovskite. Thus, structure emerges as effective strategy improve activity, durability, resistance, methane reforming reactions.

Language: Английский

Neue Materialien für Energieumwandlung und -speicherung: Aktuelle Forschung am Lehrstuhl für Physikalische Chemie DOI Creative Commons
Thomas Ruh, Tobias Berger, Hedda Drexler

et al.

BHM Berg- und Hüttenmännische Monatshefte, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Citations

0
Role of Ruthenium in Modified CeNi1–xRuxO3 Perovskite Catalysts for the Bireforming of Methane DOI
Dunpin Hong, Ba Long, Ha Cam Anh

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 31, 2024

The study on modifying catalytic properties by partially substituting nickel with ruthenium the perovskite precursor CeNiO3 has been conducted in this work. Catalysts were synthesized using a coprecipitation method, and their physicochemical evaluated through analytical techniques, including X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), Brunauer–Emmett–Teller (BET) analysis, scanning electron microscopy (SEM), high-resolution transmission (HR-TEM), H2 temperature-programmed reduction (H2-TPR), CO2 desorption (CO2-TPD), Raman spectroscopy. Additionally, thermogravimetric analysis coupled differential calorimetry (TGA-DSC) XRD employed to assess carbon deposition coke type catalyst after 100 h TOS. All ruthenium-modified CeNi1–xRuxO3 (x = 0.01, 0.05, 0.10) catalysts showed good activity CH4 conversion rates exceeding 90% at 700 °C. Ru modification facilitated incorporation of Ni into ceria lattice, resulting formation Ru–O–Ce Ni–O–Ce bonds, which significantly enhanced catalyst's sintering resistance reducibility. Moreover, Ru-modified exhibited considerable increase specific surface area, reduced crystallite size, emergence highly active basic sites, an oxygen vacancies. However, excessively loading lowers dispersion, metal agglomeration decreased activity. optimal substitution ratio was determined be 0.05. Catalyst CeNi0.95Ru0.05O3 highest BRM both approximately 95% °C, compared 88 90%, respectively, for catalysts. maintained stability reaction 3 times lower accumulation rate bare perovskite. Thus, structure emerges as effective strategy improve activity, durability, resistance, methane reforming reactions.

Language: Английский

Citations

0