Y-Doped BaCeO3 Perovskite-Supported Ru Catalysts for COx-Free Hydrogen Production from Ammonia: Effect of Strong Metal–Support Interactions

Jeon, Namgi; Kim, Sujin; Tayal, Akhil; Oh, Jungmok; Yoon, Wongeun; Kim, Won; Yun, Yongju

doi:10.1021/acssuschemeng.2c04995

Cited by 16 publications

(9 citation statements)

References 56 publications

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“…8 °C and 466.1 °C. Hence, the reduction for the impregnated sample was opted to be at 450 °C for 1 h. The peaks observed at 80-120 °C and 450-500 °C are attributed to the reduction of Ru 4+ to metallic Ru and the support surface oxygen species, respectively [21,22]. Some references imply that the peak at 450-500 °C could be also attributed to the reduction of bulk Ru [23,24].…”

Section: Resultsmentioning

confidence: 99%

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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Section: Resultsmentioning

confidence: 99%

Exsolved Ru on BaCexOy Catalysts for Thermochemical Ammonia Synthesis

Badakhsh

Vieri

Sohn

et al. 2023

International Journal of Energy Research

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“…Firstly, a support with a high specific surface area can enhance the dispersal of Ru nanoparticles, leading to improved NH 3 adsorption capacity [ 92 , 93 , 94 ]. Secondly, the characteristics of the support itself can have a synergistic effect with Ru nanoparticles, thereby enhancing catalytic activity [ 23 , 95 , 96 , 97 , 98 , 99 ]. For example, Jeon et al synthesized a Y-doped BaCeO 3 perovskite and constructed a strong metal support interaction (SMSI) interface with Ru particles, as shown in Figure 13 [ 95 ].…”

Section: Catalysts For Nh 3 Decompositionmentioning

confidence: 99%

Recent Progress on Hydrogen Production from Ammonia Decomposition: Technical Roadmap and Catalytic Mechanism

Huang

et al. 2023

Molecules

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Ammonia decomposition has attracted significant attention in recent years due to its ability to produce hydrogen without emitting carbon dioxide and the ease of ammonia storage. This paper reviews the recent developments in ammonia decomposition technologies for hydrogen production, focusing on the latest advances in catalytic materials and catalyst design, as well as the research progress in the catalytic reaction mechanism. Additionally, the paper discusses the advantages and disadvantages of each method and the importance of finding non-precious metals to reduce costs and improve efficiency. Overall, this paper provides a valuable reference for further research on ammonia decomposition for hydrogen production.

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“…Yun et al confirmed that modulating the SMSI could efficiently enhance the catalytic properties of Ru/BCY- x catalysts, which provided an efficient way for catalyst modification. 310 Chae et al prepared a series of Ru doped La x Ce 1− x O y composites for NH 3 catalytic decomposition and confirmed that N 2 desorption was the rate-determining step in the reaction 311 To reduce costs, non-noble metal-based catalysts for NH 3 decomposition have been explored. Various strategies have been employed to improve the catalytic activity, such as designing spatially confined metal nitrides, using one-pot cation–anion double hydrolysis synthesis route, and employing a sol–gel method with a second support material.…”

Section: Ammonia and Related Chemicalsmentioning

confidence: 99%