Development of a Ba–CoCe catalyst for the efficient and stable decomposition of ammonia

Morlanés, Natalia; Sayas, Salvador; Shterk, Genrikh; Katikaneni, Sai P.; Solami, Bandar; Gascón, Jorge

doi:10.1039/d0cy02336a

Cited by 37 publications

(13 citation statements)

References 63 publications

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“…[24] The peaks at 529.2 and 531.3 eV in O 1s are attributed to lattice oxygen in Co 3 O 4 and CeO 2 , respectively. [25] Finally, the Co 2p spectrum shows bond energy peaks at 795.4 and 780.1 eV, which can be attributed to Co 3 O 4 , [26] with the oxidation states of Co 2+ and Co 3+ , consistent with the results of XRD (Figure 2a).…”

Section: Resultssupporting

confidence: 82%

Electric Field‐Induced Self‐Assembly of Ultrafine Co/Ce Nanoparticles: Preparation of 3D Porous Composite Nanomaterials as Cathodes for Sodium‐Ion Batteries

Lin

Zhang

et al. 2022

Cryst. Res. Technol.

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In this paper, Co 3 O 4 /Ce(OH) 4 /C and Co 3 O 4 /CeO 2 /C cathode materials for sodium-ion batteries are prepared by electroconversion. The morphology, structure, and electrochemical properties are investigated by X-ray diffraction, scanning electron microscopy, cyclic voltammetry, charge-discharge test, etc. The results show that Co 3 O 4 /Ce(OH) 4 /C and Co 3 O 4 /CeO 2 /C have the same crystal structure, the diffraction peaks of the samples are sharp, and the material crystallinity is high, and both are of nanospherical porous morphology. In electrochemical performance, the first discharge-specific capacities of Co 3 O 4 /Ce(OH) 4 /C and Co 3 O 4 /CeO 2 /C are as high as 185.7 and 94.2 mAh g −1 at a rate of 0.1 A g −1 . Moreover, the specific capacity of Co 3 O 4 /Ce(OH) 4 /C and Co 3 O 4 /CeO 2 /C increases after 1000 cycles at the 0.5 A g −1 rates, and the coulombic efficiency remains around 100%, showing excellent cycle performance.

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Section: Resultssupporting

confidence: 82%

Electric Field‐Induced Self‐Assembly of Ultrafine Co/Ce Nanoparticles: Preparation of 3D Porous Composite Nanomaterials as Cathodes for Sodium‐Ion Batteries

Lin

Zhang

et al. 2022

Cryst. Res. Technol.

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“…Broadening of the peaks for the BCO support and impregnated sample is suspected to be the result of interaction of different species, which was also reported by Morlanés et al [20] associated with the systems containing Ba and Ce. They also conclude that Ba may facilitate the reduction of Ce.…”

Section: Resultssupporting

confidence: 76%

Exsolved Ru on BaCexOy Catalysts for Thermochemical Ammonia Synthesis

Badakhsh

Vieri

Sohn

et al. 2023

International Journal of Energy Research

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Ammonia (NH3) is a carbon-free and hydrogen-rich (17.8 wt% H2) chemical that has the potential to revolutionize the energy sector. Compared with hydrogen (H2), NH3 can be easily liquefied, stored, and transported globally. However, the conventional thermocatalytic process to synthesize NH3 accounts for 2% of global energy consumption and 1.2% of CO2 emissions annually. To make the process further efficient, new catalysts must be developed to allow for NH3 synthesis in milder conditions with high thermal stability. To this end, we have developed ruthenium (Ru) supported on perovskite (BaCexOy) via a ball-milling-assisted exsolution method that allows for a more tunable morphology. Reactivity is compared with the catalyst prepared via the conventional impregnation technique. The as-synthesized catalysts are characterized by XRD, H2-TPR, TEM, XPS, and APT. The NH3 synthesis is carried out in a packed-bed tube reactor thermochemically. Using N2 instead of Ar as the carrier gas during exsolution can favour reactivity by increasing active sites and perhaps improving metal-support interaction. The impregnated sample shows higher reactivity than the exsolved catalyst; however, the long-term durability is slightly better using the exsolved catalyst. Finally, APT results interestingly show that the exsolved catalyst is more resistant to hydride formation and hydrogen poisoning, which is one of the main deactivation mechanisms for such metallic catalysts.

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“…However, only a limited number of reports detail metals beyond Ru and Pd to facilitate this chemistry (Table 1, Figure 1). 23,78,[97][98][99][100][101][102] 35 in all cases, Ru is regarded as a highly active metal for NH 3 thermal 78 and oxidative 84,85 reforming. Similarly, low metal contents generally make for more cost-effective materials, but deactivation phenomena may necessitate supra-stoichiometric loadings to prolong catalyst lifetime (vide infra).…”

Section: Technical Catalyst Propertiesmentioning

confidence: 99%

“…1). 23,78,97–102 It has been hypothesized that N 2 desorption limits the effective kinetic rates of NH 3 decomposition on Fe-, Co- and Ni-based catalysts, while other late transition metals such as Cu, Rh, Pd, Ir and Pt are limited by N–H bond scission kinetics; 35 in all cases, Ru is regarded as a highly active metal for NH 3 thermal 78 and oxidative 84,85 reforming. Similarly, low metal contents generally make for more cost-effective materials, but deactivation phenomena may necessitate supra-stoichiometric loadings to prolong catalyst lifetime ( vide infra ).…”

Section: Reformer Reaction Engineering and Scaling Considerationsmentioning

confidence: 99%

Catalytic ammonia reforming: alternative routes to net-zero-carbon hydrogen and fuel

2022

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Development of a Ba–CoCe catalyst for the efficient and stable decomposition of ammonia

Abstract: Barium promoted cobalt-cerium catalysts prepared by coprecipitation are very efficient and stable at decomposing ammonia. Catalyst with the optimal composition show very similar activity and better stability than benchmark solids...

Cited by 37 publications

References 63 publications

Electric Field‐Induced Self‐Assembly of Ultrafine Co/Ce Nanoparticles: Preparation of 3D Porous Composite Nanomaterials as Cathodes for Sodium‐Ion Batteries

Electric Field‐Induced Self‐Assembly of Ultrafine Co/Ce Nanoparticles: Preparation of 3D Porous Composite Nanomaterials as Cathodes for Sodium‐Ion Batteries

Exsolved Ru on BaCexOy Catalysts for Thermochemical Ammonia Synthesis

Catalytic ammonia reforming: alternative routes to net-zero-carbon hydrogen and fuel

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