Supporting high-loading Ni on SBA-15 as highly active and durable catalyst for ammonia decomposition reaction

Wu, Ze-Wei; Xiong, Jing; Wang, Cunwen; Qin, Yuan-Hang

doi:10.1016/j.ijhydene.2022.11.050

Cited by 19 publications

(4 citation statements)

References 55 publications

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“…Both catalysts exhibited type IV adsorption isotherms with H 1 hysteresis loops. This indicates that the mesoporous structure had a narrow pore size distribution and was well‐ordered with double‐open cylindrical pores [44] . The ordered mesoporous structure remained well‐preserved after loading the Al and Ru species.…”

Section: Resultsmentioning

confidence: 81%

“…This indicates that the mesoporous structure had a narrow pore size distribution and was well-ordered with double-open cylindrical pores. [44] The ordered mesoporous structure remained wellpreserved after loading the Al and Ru species. The surface area, pore volume, and pore diameter of the bare SB catalyst were 828 m 2 g À 1 , 1.96 m 3 g À 1 , and 9.26 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Ru Nanoparticles Supported on Mesoporous Al‐SBA‐15 Catalysts for Highly Selective Hydrogenation of Furfural to Furfuryl Alcohol

Kumaravel,

Durai,

Kaliyamoorthy

et al. 2023

ChemistrySelect

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Furfuryl alcohol, which is the hydrogenated product of furfural, has been identified as a very promising platform chemical with high potential for applications in the manufacture of key chemicals, lubricants, fragrances, and pharmaceuticals. In this work, bare SB, and x % Ru/Al‐SB (x=1.5, 2.5, 3.5, and 4.5 wt. %) samples were fabricated by a hydrothermal method. Bare and most active catalysts were characterized by different techniques, such as BET, FE‐SEM, TEM, FT‐IR, and XRD, to understand their physical and chemical properties. An evaluation of the effects of various reaction parameters, such as catalyst loading, reaction temperature, and reaction time, on the catalytic performance, showed higher catalytic conversion of furfural and selectivity for the desired products. The most active RuS3 catalyst showed 100 % conversion of furfural and 99 % selectivity for furfuryl alcohol. It could be reused for five consecutive reaction cycles without significant loss of performance. In addition, Ru leaching and loss of conversion or selectivity were not noticed during the five‐run recycling test. The EDS elemental mapping analysis of the used catalyst established the preservation of the mesoporous structure, suggesting a strong interaction between the hexagonal porous silicate and the Ru nanoparticles.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Ru Nanoparticles Supported on Mesoporous Al‐SBA‐15 Catalysts for Highly Selective Hydrogenation of Furfural to Furfuryl Alcohol

Kumaravel,

Durai,

Kaliyamoorthy

et al. 2023

ChemistrySelect

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“…NH3 decomposition is an endothermic reaction. Therefore, the NH3 conversion rate rises with increasing reaction temperature (Wu et al 2023). Among the four catalysts, Ru/AC-GN displayed the highest activity, followed by Ru/AC-N, whereas Ru/AC and Ru/AC-G showed no significant difference in activity.…”

Section: Assessment Of Nh3 Decomposition Performancementioning

confidence: 93%

“…Additionally, the outer surface and large pores of AC-GN offer more defect sites, conducive to anchoring Ru, thereby enhancing its dispersion and stability. Wu et al (2023) found that active metals loaded on the outer surface of the carrier exhibit superior ammonia decomposition performance, attributed to the ease of gas adsorption-desorption on the outer surface. Consequently, Ru situated on the outer surface and large pores of AC-GN would theoretically enhance the overall catalytic performance.…”

Section: Structure-activity Relationship Between Carriers and Active ...mentioning

confidence: 99%

Enhanced activity of Ru-based catalysts for ammonia decomposition through nitrogen doping of hierarchical porous carbon carriers

Wang,

Chen,

Hao

et al. 2024

BioRes

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Activated carbon (AC) materials, renowned for their high specific surface area, excellent conductivity, and customizable functional groups, are widely employed as catalyst carriers. However, enhancing the activity of Ru-based catalysts supported on AC (Ru/AC) for ammonia decomposition remains a challenge. In this study, commercial AC was utilized as a substrate, with glucose and urea employed as modifiers. Specifically, the surface of the AC was modified via a hydrothermal pyrolysis method, resulting in the successful post-treatment in situ co-doping of nitrogen (AC-GN). Experimental results revealed that Ru/AC-GN exhibited a hydrogen production rate 46% higher than that of Ru/AC at 475 °C, indicating improved activity and stability. The characterization of AC-GN demonstrated that nitrogen doping primarily occurred on the external surface and macropores of the AC, increasing the nitrogen content in the carrier, particularly pyrrolic nitrogen content, while preserving the original structural and morphological integrity of the AC. The enhanced dispersion of Ru, combined with the improved electronic transmission capabilities and strengthened interactions between the metal and the modified carrier, were identified as pivotal factors contributing to the enhanced low-temperature efficacy of Ru/AC-GN. This paper presents a novel direction for the large-scale preparation of efficient catalysts for ammonia decomposition.

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Recent progress on ammonia cracking technologies for scalable hydrogen production

Trangwachirachai,

Rouwenhorst,

Lefferts

et al. 2024

Current Opinion in Green and Sustainable Chemistry

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Supporting high-loading Ni on SBA-15 as highly active and durable catalyst for ammonia decomposition reaction

Cited by 19 publications

References 55 publications

Ru Nanoparticles Supported on Mesoporous Al‐SBA‐15 Catalysts for Highly Selective Hydrogenation of Furfural to Furfuryl Alcohol

Ru Nanoparticles Supported on Mesoporous Al‐SBA‐15 Catalysts for Highly Selective Hydrogenation of Furfural to Furfuryl Alcohol

Enhanced activity of Ru-based catalysts for ammonia decomposition through nitrogen doping of hierarchical porous carbon carriers

Recent progress on ammonia cracking technologies for scalable hydrogen production

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