Mechanistic Origin of Enhanced CO Catalytic Oxidation over Co3O4/LaCoO3 at Lower Temperature

Liu, Shujie; Zhang, Wei; Deng, Ting; Wang, Dong; Wang, Xiyang; Zhang, Xinxin; Cai, Zhiyong; Zheng, Weitao

doi:10.1002/cctc.201700937

Cited by 29 publications

(22 citation statements)

References 34 publications

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“…However, compared to the latter, nickel‐based catalysts are desirable for SOFC industrial applications considering the availability and cost of nickel. The addition of metallic nanoparticles can be realized by different methods and the exsolution technique leads generally to better performance and less degradation than conventional impregnation …”

Section: Introductionmentioning

confidence: 99%

Catalytic Steam Reforming of Natural Gas over a New Ni Exsolved Ruddlesden‐Popper Manganite in SOFC Anode Conditions

et al. 2020

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The catalytic behavior of the new Ni exsolved Ruddlesden‐Popper (RP) manganite (La1.5Sr1.5Mn1.5Ni0.5O7) for the reforming reaction was studied. The material was synthesized by the Pechini method and reduced to induce the formation of two phases: n=1 RP structure LaSrMnO4 decorated with Ni nanoparticles. Ni impregnation on (La,Sr)2MnO4 ceramic support of similar composition was also prepared for comparison. The catalytic measurements were carried out in a reduction‐reaction process with low steam to carbon content (S/C=0.15) at 700, 800 and 850 °C. The exsolved material exhibits a better performance than the impregnated for the methane steam reforming reaction, especially at 850 °C with higher conversion and H2 production rate. However, in light alkane gas mixtures (CH4−C2H6 and CH4−C3H8), the behavior is affected due to the competition between reactions and low available metallic active sites, without affecting the H2 production. The exceptional overall results considering this new material as a promising anode material in a SOFC fed with Colombian natural gas.

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Section: Introductionmentioning

confidence: 99%

Catalytic Steam Reforming of Natural Gas over a New Ni Exsolved Ruddlesden‐Popper Manganite in SOFC Anode Conditions

et al. 2020

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“…The exsolution of Co is one of the most popular areas of research in the exsolution field and literature is quite diverse with many publications in areas of application, including, but not limited to, CO [26,115] or soot oxidation, [116] Zn-air batteries, [70] chemical looping, [117] and fuel cells. [118] Co particles can be active for both anode [119] and the cathode [120] as well as in symmetrical cells [121] in SOFCs.…”

Section: Cobaltmentioning

confidence: 99%

“…[ 124 ] In another study where Co exsolved particles proved to have relatively high activity for CO oxidation, XPS and X‐ray absorption near‐edge structure analysis (XANES) were employed in order to confirm that the enhanced activity was a result of a synergetic effect between the surface oxygen of LaCoO 3 /Co 3 O 4 and Co 3+ in the Co 3 O 4 nanoparticles. [ 115 ] The combined effect of the oxygen vacancies and the surface cobalt oxide layer on the catalytic activity of such systems was also demonstrated in soot combustion [ 123 ] where the exsolution of Co species facilitated further mobility of the adsorbed oxygen species through spillover phenomena thus increasing the activity of the whole surface.…”

Section: Non‐noble Metal Systems and Their Applicationsmentioning

confidence: 99%

Emergence and Future of Exsolved Materials

Kousi

Tang

Metcalfe

et al. 2021

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130

107

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game-changing across multiple fields including but not limited to energy conversion and storage and catalysis, as evidenced by more than 300 papers having been published since the first reports of the method a decade ago. However, to the best of our knowledge only four reviews covering different application-related aspects of exsolution have been published so far. [17][18][19][20] Here, we review the trends that define the development of the exsolution concept in terms of design, tunability, functionality, and applicability. We analyze a set of 300 papers published so far on exsolution, to extract statistical information in terms of design elements (types of crystal structures, exsolvable and host lattice elements), synthesis routes, functionalities, and fields of application, including electrochemistry, catalysis photocatalysis, and other (discussed separately for noble and non-noble metal systems). The selected papers are listed and analyzed in the Supporting Information and the results are summarized in the infographic shown in Figure 3 and in Table 1 and based on these, we highlight exciting future directions of research in this fast-growing field. Figure 3. Exsolution infographic. Statistical analysis on a pool of 300 papers published on the field of exsolution since 2010.

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“…Therefore, supported catalysts based on transitional metal oxides with high catalytic activity (such as CuO, Co 3 O 4 , etc.) have attracted increasing attention due to their excellent catalytic activity and economical properties [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Co 3 O 4 -based catalysts have been widely studied for their exceptional low-temperature catalytic activities, which are comparable to those of noble metal-based catalysts [9,10]. However, the Co 3 O 4 -based catalysts usually suffer quick deactivation under high humidity.…”

Section: Introductionmentioning

confidence: 99%

CO Oxidation over Metal Oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2) Doped CuO-Based Catalysts Supported on Mesoporous Ce0.8Zr0.2O2 with Intensified Low-Temperature Activity

Cui

Chen

et al. 2019

Catalysts

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CuO-based catalysts are usually used for CO oxidation owing to their low cost and excellent catalytic activities. In this study, a series of metal oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2)-doped CuO-based catalysts with mesoporous Ce0.8Zr0.2O2 support were simply prepared by the incipient impregnation method and used directly as catalysts for CO catalytic oxidation. These mesoporous catalysts were systematically characterized by X-ray powder diffraction (XRD), N2 physisorption, transmission electron microscopy (TEM), energy-dispersed spectroscopy (EDS) mapping, X-ray photoelectron spectroscopy (XPS), and H2 temperature programmed reduction (H2-TPR). It was found that the CuO and the dopants were highly dispersed among the mesoporous framework via the incipient impregnation method, and the strong metal framework interaction had been formed. The effects of the types of the dopants and the loading amounts of the dopants on the low-temperature catalytic performances were carefully studied. It was concluded that doped transition metal oxides could regulate the oxygen mobility and reduction ability of catalysts, further improving the catalytic activity. It was also found that the high dispersion of rare earth metal oxides (PrO2, Sm2O3) was able to prevent the thermal sintering and aggregation of CuO-based catalysts during the process of calcination. In addition, their presence also evidently improved the reducibility and significantly reduced the particle size of the CuO active sites for CO oxidation. The results demonstrated that the 15CuO-3Fe2O3/M-Ce80Zr20 catalyst with 3 wt. % of Fe2O3 showed the best low-temperature catalytic activity toward CO oxidation. Overall, the present Fe2O3-doped CuO-based catalysts with mesoporous nanocrystalline Ce0.8Zr0.2O2 solid solution as support were considered a promising series of catalysts for low-temperature CO oxidation.

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Mechanistic Origin of Enhanced CO Catalytic Oxidation over Co₃O₄/LaCoO₃ at Lower Temperature

Cited by 29 publications

References 34 publications

Catalytic Steam Reforming of Natural Gas over a New Ni Exsolved Ruddlesden‐Popper Manganite in SOFC Anode Conditions

Catalytic Steam Reforming of Natural Gas over a New Ni Exsolved Ruddlesden‐Popper Manganite in SOFC Anode Conditions

Emergence and Future of Exsolved Materials

CO Oxidation over Metal Oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2) Doped CuO-Based Catalysts Supported on Mesoporous Ce0.8Zr0.2O2 with Intensified Low-Temperature Activity

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