Monitoring by in situ NAP-XPS of active sites for CO2 methanation on a Ni/CeO2 catalyst

López-Rodríguez, Sergio; Davó‐Quiñonero, Arantxa; Bailón‐García, Esther; Lozano‐Castelló, Dolores; Villar‐García, Ignacio J.; Dieste, Virginia Pérez; Onrubia-Calvo, Jon A.; González‐Velasco, Juan R.; Bueno‐López, Agustín

doi:10.1016/j.jcou.2022.101980

Cited by 24 publications

(6 citation statements)

References 50 publications

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“…The peaks at 852.2 and 853.8 eV correspond to Ni 0 and Ni 2+ , respectively. The peak at 855.7 eV can be attributed to the surface Ni 3+ (NiOOH) species caused by the presence of Ni 2+ vacancies in the NiO lattice. − The deconvolution results show that the valence distribution of Ni 0 grows larger with the increase of Ni content in the catalysts. The XPS spectra of the Ce 3d core electron levels for the Ni/CeO 2 -based catalysts are depicted in Figure S3.…”

Section: Resultsmentioning

confidence: 99%

Ni Nanoparticles Supported on CeO₂ as Catalysts for Aqueous-Phase Glycerol Reforming

Ge,

Zhang,

Xiao

et al. 2024

ACS Appl. Nano Mater.

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The efficient production of hydrogen by aqueousphase reforming (APR) of biomass-derived polyols demands the nanoscale bifunctionality of the catalyst, including dehydrogenation and decarbonylative C−C bond cleavage. Though nickelbased catalysts have been widely studied in the APR reaction, the approach to regulate the bifunctionality in this catalytic system still remains elusive. In this work, Ni/CeO 2 nanocatalysts of different Ni contents were synthesized and employed for APR of glycerol. The rates for dehydrogenation and decarbonylative C−C bond cleavage reached the optimal balance for catalysts containing 20−30 wt % Ni, leading to the highest hydrogen productivity. Complementary characterizations revealed that Ni of lower contents mainly formed the small Ni particles of the oxidized state as the active site for dehydrogenation; however, it lacked the functionality for C− C cleavage, limiting the overall rate of hydrogen production. In contrast, the high content of Ni formed large particles that created two domains of Ni, i.e., metallic and oxidized Ni, which acted as the sites for decarbonylative C−C bond cleavage and dehydrogenation, respectively. Further increasing the content of metallic Ni triggered more methanation reactions that consumed the produced hydrogen. Only when the bifunctionality in nanoscale is well coordinated and the desirable reaction steps are balanced can the production of H 2 be maximized. This work may provide a mechanistic understanding about the bifunctionality of Ni-based nanocatalysts in the APR reaction.

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Section: Resultsmentioning

confidence: 99%

Ni Nanoparticles Supported on CeO₂ as Catalysts for Aqueous-Phase Glycerol Reforming

Ge,

Zhang,

Xiao

et al. 2024

ACS Appl. Nano Mater.

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“…López-Rodríguez et al 97 monitored the active sites on Ni/CeO 2 catalyst for CO 2 methanation by in situ near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS). The Ni0 sites and oxygen vacancies located at the Ni–CeO 2 interface were confirmed to be the active sites for H 2 dissociation and CO 2 dissociation, respectively, while a small amount of NiO and Ni-carbonates hydroxyls acted as spectators in methanation.…”

Section: Understanding Ceria-based Catalysts For Co2 Methanationmentioning

confidence: 99%

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation

Xie

Wen

et al. 2023

Green Chem.

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“…The small peak (red) at binding energy (BE) of 852.1 eV can be assigned to metallic Ni (Biesinger et al, 2009(Biesinger et al, , 2011. The most intense peak (blue) at BE of 856.5 eV and a satellite (green) at BE of 862.1 eV belong to Ni 2+ (Heine et al, 2016;Lo ´pez-Rodrı ´guez et al, 2022) (Table S1 of the supporting information).…”

Section: Ni@nio/nico 3 Core-shell Nanostructures For Photocatalytic H...mentioning

confidence: 99%

Photocatalytic setup for in situ and operando ambient-pressure X-ray photoelectron spectroscopy at MAX IV Laboratory

Klyushin¹,

Ghosalya²,

Kokkonen³

et al. 2023

J Synchrotron Rad

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The Ambient-Pressure X-ray Photoelectron Spectroscopy (APXPS) endstation at the SPECIES beamline at MAX IV Laboratory has been improved. The latest upgrades help in performing photo-assisted experiments under operando conditions in the mbar pressure range using gas and vapour mixtures whilst also reducing beam damage to the sample caused by X-ray irradiation. This article reports on endstation upgrades for APXPS and examples of scientific cases of in situ photocatalysis, photoreduction and photo-assisted atomic layer deposition (photo-ALD).

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Monitoring by in situ NAP-XPS of active sites for CO2 methanation on a Ni/CeO2 catalyst

Cited by 24 publications

References 50 publications

Ni Nanoparticles Supported on CeO₂ as Catalysts for Aqueous-Phase Glycerol Reforming

Ni Nanoparticles Supported on CeO₂ as Catalysts for Aqueous-Phase Glycerol Reforming

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation

Photocatalytic setup for in situ and operando ambient-pressure X-ray photoelectron spectroscopy at MAX IV Laboratory

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Monitoring by in situ NAP-XPS of active sites for CO2 methanation on a Ni/CeO2 catalyst

Cited by 24 publications

References 50 publications

Ni Nanoparticles Supported on CeO2 as Catalysts for Aqueous-Phase Glycerol Reforming

Ni Nanoparticles Supported on CeO2 as Catalysts for Aqueous-Phase Glycerol Reforming

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO2methanation

Photocatalytic setup for in situ and operando ambient-pressure X-ray photoelectron spectroscopy at MAX IV Laboratory

Contact Info

Product

Resources

About

Ni Nanoparticles Supported on CeO₂ as Catalysts for Aqueous-Phase Glycerol Reforming

Ni Nanoparticles Supported on CeO₂ as Catalysts for Aqueous-Phase Glycerol Reforming

Progress in reaction mechanisms and catalyst development of ceria-based catalysts for low-temperature CO₂methanation