Effects of composition and production route on structure and catalytic activity for ammonia decomposition reaction of ternary Ni–Mo nitride catalysts

Leybo, Denis V.; Baiguzhina, Anar N.; Muratov, Dmitry S.; Arkhipov, D. I.; Kolesnikov, Еvgeny; Levina, V. V.; Kosova, Natalia I.; Кузнецов, Денис

doi:10.1016/j.ijhydene.2015.12.171

Cited by 44 publications

(25 citation statements)

References 20 publications

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“…Iron has been combined with Mo [47]. Nickel has been studied in the bimetallic systems Ni-Ir [48], Ni-Pt [49], Ni-Mo [50,51], Ni-Pd [52] and Ni-Fe [53]. All these bimetallic catalysts have shown better ammonia decomposition performances than their monometallic counterparts, but still ammonia conversion is low at temperatures below 550ºC [37].…”

Section: Introductionmentioning

confidence: 99%

Catalytic ammonia decomposition for hydrogen production on Ni, Ru and Ni Ru supported on CeO2

Lucentini

Casanovas

Llorca

2019

International Journal of Hydrogen Energy

146

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Ceria-supported Ni, Ru and Ni-Ru catalysts have been tested in the catalytic decomposition of ammonia to yield hydrogen and their performance in long-term tests has been compared to alumina-supported Ni and Ru samples. The catalysts have been characterized by XRD, TPR, NH 3 -TPD, HAADF-STEM, SEM, BET and XPS. Ceria-based samples are more active in ammonia decomposition with respect to their alumina-based counterparts, which has been ascribed to a particular metal-support interaction, while acidity does not seem to play an important role. Ru-based catalysts are more active than Ni-based samples, but they deactivate rapidly, in particular the Ru/Al 2 O 3 sample. This is ascribed to loss of exposed Ru, as demonstrated by XPS and HAADF-STEM. Considering the high cost and limited availability of Ru, the Ni/CeO 2 catalyst appears as a promising system for ammonia decomposition due to its good performance and low cost. In situ XPS experiments reveal that the active sites for the catalytic decomposition of ammonia are metallic Ni and Ru. Bimetallic Ni-Ru catalysts do not outperform their monometallic counterparts, irrespective of the order in which the metals are added.

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Section: Introductionmentioning

confidence: 99%

Catalytic ammonia decomposition for hydrogen production on Ni, Ru and Ni Ru supported on CeO2

Lucentini

Casanovas

Llorca

2019

International Journal of Hydrogen Energy

146

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“…Consequently, transition metals, such as Ti, Fe, Ni, and Co, are commonly preferred; particularly for large‐scale hydrogen generation 12,13 . Among these metals, Ni is particularly attractive on account of its high activity 14‐17 …”

Section: Introductionmentioning

confidence: 99%

“…Consequently, simple and scalable routes for the synthesis of sheet‐like silicates on an industrial scale are still required. Furthermore, to the best of the authors' knowledge, the literature contains only scant information regarding ammonia decomposition using non‐noble metal catalysts at temperatures lower than 400°C 14‐17 …”

Section: Introductionmentioning

confidence: 99%

Green synthesis of porous Ni‐silicate catalyst for hydrogen generation via ammonia decomposition

et al. 2020

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“…Although ruthenium (Ru) is known as one of the most active species, Ru-based catalysts are not desirable for mass utilization owing to their poor availability and high cost. 2) For the development of inexpensive and highly active catalysts for ammonia decomposition, metals, bimetals, carbides, and nitrides such as Fe, 8),13), 14) Co, 8),12),14), 15) Ni, 1),8),11),14), 16) FeCo, 17) NiFe, 18) Mo 2 C, 19) Mo 2 N, 20) MoN, 21) Ni 2 Mo 3 N, 22) Co 3 Mo 3 N, 6), 20) and MnN-Li 2 NH 23) have been investigated as active species for ammonia decomposition. Among these, Co 3 Mo 3 N is one of the most promising candidates as an inexpensive and highly active catalyst since its binding energy with nitrogen is suitable for ammonia decomposition.…”

Section: Introductionmentioning

confidence: 99%

The effects of the addition of calcium phosphate on catalytic activities for ammonia decomposition on CoMo-based catalysts

Ehiro

Katagiri

Yamaguchi

et al. 2019

J. Ceram. Soc. Japan

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In this study, wet impregnation method and solgel technique were used to prepare CoMo-based catalysts supported on two types of porous silicas containing calcium phosphate. The prepared catalysts were characterized using various techniques, such as N 2 adsorptiondesorption measurement, scanning electron microscope, X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), differential thermal analysis, and X-ray photoelectron spectroscopy. The catalysts were tested for ammonia decomposition to produce CO x-free hydrogen. The results of the XRD and FT-IR measurements elucidated that the crystal structure of calcium phosphate on the silica supports was attributed to calcium hydroxyapatite (HAp). The addition of calcium phosphate changed the porous structures of the catalysts, and decreased their BET surface areas and total pore volumes. Furthermore, the catalytic activity of the CoMo-based catalysts was influenced by the amount of calcium phosphate added. It was observed that the ammonia conversion at 873 K was increased by a maximum of 12.6% when 0.5 wt% of calcium phosphate was added to the catalyst, while a further addition of calcium phosphate beyond 1.0 wt% inhibited the ammonia conversion. From this study, it was concluded that HAp could work as a promoter for ammonia decomposition.

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Effects of composition and production route on structure and catalytic activity for ammonia decomposition reaction of ternary Ni–Mo nitride catalysts

Cited by 44 publications

References 20 publications

Catalytic ammonia decomposition for hydrogen production on Ni, Ru and Ni Ru supported on CeO2

Catalytic ammonia decomposition for hydrogen production on Ni, Ru and Ni Ru supported on CeO2

Green synthesis of porous Ni‐silicate catalyst for hydrogen generation via ammonia decomposition

The effects of the addition of calcium phosphate on catalytic activities for ammonia decomposition on CoMo-based catalysts

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