Promoted porous Co3O4-Al2O3 catalysts for ammonia decomposition

Zhang, Zhe-Shan; Fu, Xin-Pu; Wang, Wei-Wei; Zhao, Jianwei; Song, Qi-Sheng; Jia, Chun‐Jiang

doi:10.1007/s11426-018-9261-5

Cited by 44 publications

(21 citation statements)

References 34 publications

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“…Much effort s have been devoted in the development of active catalysts for ammonia decomposition, including both noble metals [ 4,7 −9 ] and transition metals [5,[10][11][12][13][14][15][16][17][18][19][20][21] . Among them, Ru-based catalysts showed the best catalytic activity at the temperatures of 300 −550 °C [4,8,9] .…”

Section: Introductionmentioning

confidence: 99%

“…Rational design of transition metal-based catalyst with enhanced catalytic performance at low temperatures is in great significance. Many attempts including using various promoters [ 22 −24 ], designing bimetallic catalysts [25][26][27][28] , choosing proper supports [13,18] and optimizing catalyst preparations [14,16,18] have been studied. It has been reported that support basicity plays a crucial role in ammonia decomposition and the enhanced support basicity can promote the catalytic performance of catalysts [4] .…”

Section: Introductionmentioning

confidence: 99%

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Transition metal nanoparticles supported La-promoted MgO as catalysts for hydrogen production via catalytic decomposition of ammonia

Wang

Zhao

et al. 2019

Journal of Energy Chemistry

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transition metal nanoparticles supported La-promoted MgO as catalysts for hydrogen production via catalytic decomposition of ammonia

Wang

Zhao

et al. 2019

Journal of Energy Chemistry

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“…325 In the work of Zhang et al the conversion of ammonia using Co 3 O 4 reaches its maximum at a reaction temperature of 500 °C, while at higher temperatures the conversion decreases. 325 Czekajło and Lendzion-Bieluń3 26 were able to increase the conversion by adding the oxides of Al, Ca, and K as promoters. The addition of promoter oxides is believed to stabilize the surface area of the catalysts.…”

mentioning

confidence: 98%

Review of the Decomposition of Ammonia to Generate Hydrogen

Lucentini

Garcia

Vendrell

et al. 2021

Ind. Eng. Chem. Res.

301

193

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Because of the problems associated with the generation and storage of hydrogen in portable applications, the use of ammonia has been proposed for on-site production of hydrogen through ammonia decomposition. First, an analysis of the existing systems for ammonia decomposition and the challenges for this technology are presented. Then, the state of the art of the catalysts used to date for ammonia decomposition is described considering the catalysts composed of noble and non-noble metals and their combinations, as well as novel materials such as alkali metal amides and imides. The effect of the supports and promoters used is analyzed in detail, and the catalytic activity obtained is compared. An analysis of the kinetics of the reaction obtained with different catalysts is also presented and discussed, including the reaction mechanism, the determining step of the reaction, and the apparent activation energy. Finally, the structured reactors used to date for the decomposition reaction of ammonia are explored, as well as the possibilities offered by catalytic membrane reactors, which allow the on-site simultaneous production and separation of hydrogen.

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“…reaction path and have the same active sites in the ammonia decomposition. Notably, the E a in this work was lower than those of many cobalt‐based catalysts documented in some literature (Table S2), [ 21,42‐43,51 ] which may also be an essential reason for the excellent activity of the Co 0.7 Sm 0.3 O x catalyst.…”

Section: Resultsmentioning

confidence: 58%

“…Besides, the peak around 187 cm –1 was assigned to the tetrahedral sites (CoO 4 ) with F 2 g symmetry. [ 51 ] Moreover, the peak intensity of the different Co a Sm b O x catalysts increased with the increase of cobalt contents.…”

Section: Resultsmentioning

confidence: 99%

Co_aSm_bO_x Catalyst with Excellent Catalytic Performance for NH₃ Decomposition

Zhao

Xu³

et al. 2021

Chin. J. Chem.

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Main observation and conclusion Transition metal‐rare earth oxide catalysts had the ability to catalyze ammonia decomposition according to recent years’ scientific reports. However, most of those catalysts had their own limitations: the catalytic activity was poor, and/or the active species could not clearly be identified. Here we report the CoaSmbOx catalysts with good dispersion, controllable content, and excellent catalytic performance for ammonia decomposition. The various content catalysts were synthesized by aerosol‐assisted self‐assembly approach. These catalysts had high dispersion and great morphology according to the images of the transmission electron microscope (TEM) and the scanning electron microscope (SEM). The temperature‐programmed reduction by hydrogen (H2‐TPR) and in‐situ X‐ray diffraction (XRD) results indicated that the interaction between cobalt oxide and samarium oxide influenced the redox properties of cobalt oxide. Combined with in‐situ Raman, we found that Co0 was an active species of the CoaSmbOx catalysts in ammonia decomposition. Moreover, the temperature‐programmed desorption of NH3 (NH3‐TPD) data illustrated that the addition of Sm was beneficial to the adsorption of NH3. In general, we successfully obtained the CoaSmbOx catalyst with high activity and good stability. More importantly, we have identified the structure‐function relationship of catalysts by exploring the active species in the reaction process.

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Promoted porous Co3O4-Al2O3 catalysts for ammonia decomposition

Cited by 44 publications

References 34 publications

Transition metal nanoparticles supported La-promoted MgO as catalysts for hydrogen production via catalytic decomposition of ammonia

Transition metal nanoparticles supported La-promoted MgO as catalysts for hydrogen production via catalytic decomposition of ammonia

Review of the Decomposition of Ammonia to Generate Hydrogen

Co_aSm_bO_x Catalyst with Excellent Catalytic Performance for NH₃ Decomposition

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Promoted porous Co3O4-Al2O3 catalysts for ammonia decomposition

Cited by 44 publications

References 34 publications

Transition metal nanoparticles supported La-promoted MgO as catalysts for hydrogen production via catalytic decomposition of ammonia

Transition metal nanoparticles supported La-promoted MgO as catalysts for hydrogen production via catalytic decomposition of ammonia

Review of the Decomposition of Ammonia to Generate Hydrogen

CoaSmbOx Catalyst with Excellent Catalytic Performance for NH3 Decomposition

Contact Info

Product

Resources

About

Co_aSm_bO_x Catalyst with Excellent Catalytic Performance for NH₃ Decomposition