Enhancing the performance of a novel CoRu/CeO2 bimetallic catalyst for the dry reforming of methane via a mechanochemical process

被引：13

作者：

Armengol-Profitos, Marina ^{[1
,2
]}

Braga, Andrea ^{[1
,2
]}

Pascua-Sole, Laia ^{[1
,2
]}

Lucentini, Ilaria ^{[1
,2
]}

Garcia, Xenia ^{[1
,2
,3
]}

Soler, Lluis ^{[1
,2
,3
]}

Vendrell, Xavier ^{[1
,2
]}

Serrano, Isabel ^{[1
,2
]}

Villar-Garcia, Ignacio J. ^{[4
]}

Perez-Dieste, Virgina ^{[4
]}

Escudero, Carlos ^{[4
]}

Divins, Nuria J. ^{[1
,2
,3
]}

Llorca, Jordi ^{[1
,2
,3
]}

机构：

[1] Univ Politecn Cataluna, Inst Energy Technol, EEBE, Eduard Maristany 10-14, Barcelona 08019, Spain

[2] Univ Politecn Cataluna, Dept Chem Engn, EEBE, Eduard Maristany 10-14, Barcelona 08019, Spain

[3] Univ Politecn Cataluna, Barcelona Res Ctr Multiscale Sci & Engn, EEBE, Eduard Maristany 10-14, Barcelona 08019, Spain

[4] ALBA Synchrotron Light Source, Carrer Llum 2-26, Barcelona 08290, Spain

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 345卷

基金：

欧盟地平线“2020”;

关键词：

Mechanochemistry; Methane dry reforming (DRM); Operando characterization; Bimetallic catalyst; Hydrogen production; IN-SITU; SUPPORTED CATALYSTS; SYNTHESIS GAS; CO; COBALT; RU; STATE; NI; OXIDES; REDOX;

D O I：

10.1016/j.apcatb.2023.123624

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A mechanochemical synthesis method has been used to synthesize CoRu nanoparticles supported on CeO2 for methane dry reforming. In this work, we study the effect of Ru addition to Co/CeO2-based catalysts and of the synthesis method by screening their catalytic activity, using synchrotron X-ray diffraction (XRD), and operando near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS). Ruthenium addition directly impacts the reducibility of cobalt species and results in smaller particle sizes, as demonstrated by H-2-temperature programmed reduction and XRD. NAP-XPS shows that Ru modifies the metal-support interaction, as evidenced by the higher Ce3+/Ce ratios for the bimetallic samples and tuning the oxidation state of Ru. The synthesis method also influences the dispersion of Co and Ru on the surface. Mechanochemically-prepared samples (mono- and bimetallic) outperformed the conventionally-synthesized counterparts by reaching higher CH4 and CO2 conversions, resulting in a stable CoRu/CeO2 catalyst for 24 h at 700 degrees C and yielding an H-2/CO ratio close to 1.

引用

页数：13

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