Bimetallic Ru‐Fe Nanoparticles Supported on Carbon Nanotubes for Ammonia Decomposition and Synthesis

Cai, Chen; Chen, Yi‐Wen; Ali, Arshid Mahmood; Luo, Wenjia; Wen, Jie; Zhang, Lianhong; Zhang, Hui

doi:10.1002/ceat.201900508

Cited by 32 publications

(21 citation statements)

References 57 publications

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“…Ruthenium bimetallic catalysts have not only been tested to increase catalytic activity, but also to increase stability. Thus, Chen et al 231 prepared a Ru−Fe catalyst supported on CNTs obtaining a slightly lower catalytic activity than the monometallic Ru/CNTs catalyst, but a superior longterm stability (60 h).…”

mentioning

confidence: 99%

Review of the Decomposition of Ammonia to Generate Hydrogen

Lucentini

Garcia

Vendrell

et al. 2021

Ind. Eng. Chem. Res.

256

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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mentioning

confidence: 99%

Review of the Decomposition of Ammonia to Generate Hydrogen

Lucentini

Garcia

Vendrell

et al. 2021

Ind. Eng. Chem. Res.

256

193

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“…The Cu introduction could effectively lower the energy barrier in the *NN reduction process of RhCu‐BUNNs electrode with a smaller barrier of 0.16 eV, resulting in enhanced NRR (Figure 11d and 10e) [41b] . The same phenomena were observed after the addition of Fe in bimetallic Ru−Fe nanoparticles supported on nanotubes (Ru 3 Fe/CNTs) when used for NRR [41c] …”

Section: Nrr On Noble Metal (Viii) Catalystsmentioning

confidence: 58%

An Overview on Noble Metal (Group VIII)‐based Heterogeneous Electrocatalysts for Nitrogen Reduction Reaction

Chen

Zhang

Jin

et al. 2020

Chemistry An Asian Journal

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The typically the Haber‐Bosch process of nitrogen (N2) reduction to ammonia (NH3) production, expends a lot of energy, resulting in severe environmental issues. Electro‐catalytic N2 reduction to NH3 formation by renewable resources is one of the effective ways to settle the issue. However, the electro‐catalytic performances and selectivity of catalysts for electrochemical nitrogen reduction reaction (NRR) are very low. Therefore, it is of great significance to develop more efficient electro‐catalysts to satisfy the needs of practical use. Among the reported catalysts, those based on Group VIII noble metals heterogeneous catalysts display excellent NRR activities and high selectivity because of their good conductivity, rich active surface area, unfilled d‐orbitals, and the abilities with easy adsorption of reactants and stable reaction intermediates. Herein, we will introduce the progress of Group VIII precious metals heterogeneous catalysts applied in the electrocatalytic N2 reduction reaction. Then single precious metal electrocatalysts, precious metal alloy electrocatalysts, heterojunction structure electrocatalysts, and precious metal compounds based on the strategies of morphology engineering, crystal facet engineering, defect engineering, heteroatom doping, and synergetic interface engineering will be discussed. Finally, the challenges and prospects of the NH3 synthesis have been put forward. In the review, we will provide helpful direction to the development of effective electro‐catalysts for catalytic N2 reduction reaction.

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“…The Ru−Fe/CNTs catalyst was synthesized with a high degree of dispersion and uniform particle size. 45 The Ru 3 Fe/CNTs catalyst yields a superior catalytic stability for ammonia decomposition to that of Ru/CNTs catalyst, due to a much faster desorption process of adsorbing N atoms on Ru 3 Fe/CNTs.…”

Section: Carbon Materials As Support For Ru-basedmentioning

confidence: 99%

“…Aside from the introduction of alkali or alkaline earth metals, bimetallic Ru-based catalysts with dual active species were also fabricated to enhance the catalytic performance for ammonia decomposition. The Ru–Fe/CNTs catalyst was synthesized with a high degree of dispersion and uniform particle size . The Ru 3 Fe/CNTs catalyst yields a superior catalytic stability for ammonia decomposition to that of Ru/CNTs catalyst, due to a much faster desorption process of adsorbing N atoms on Ru 3 Fe/CNTs.…”

Section: Carbon Materials As Support For Ru-based Catalystsmentioning

confidence: 99%

Ru-Based Catalysts for Ammonia Decomposition: A Mini-Review

et al. 2021

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Ammonia with a hydrogen content of 17.6 wt % is viewed as a promising hydrogen carrier because the infrastructures for its production, storage, and transportation have been well established. The challenge is that currently the straight production of H2 from NH3 only works at high temperatures. To date, various metal-based catalysts have been developed for NH3 decomposition, among which the Ru-based ones are the most superior due to the suitable Ru–N binding energy. In the past decade, efforts have been put in to improve the performance of Ru-based catalysts, and the target is to lower Ru loading and reaction temperature. A large variety of support and promoter materials were studied, and advanced techniques were employed to disclose the relationship between catalytic performance and catalyst structure. In this paper, we conduct a review on the materials that are used as supports and/or promoters, focusing specifically on the carbon (CNTs, CNFs, and graphene) and metal oxide (Al2O3, MgO, SiO2, and others) materials. Moreover, the reaction mechanism for ammonia decomposition over Ru-based catalysts is described, and future works on designing novel catalysts and unravelling the catalyst structure–activity relationship are proposed.

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Bimetallic Ru‐Fe Nanoparticles Supported on Carbon Nanotubes for Ammonia Decomposition and Synthesis

Cited by 32 publications

References 57 publications

Review of the Decomposition of Ammonia to Generate Hydrogen

Review of the Decomposition of Ammonia to Generate Hydrogen

An Overview on Noble Metal (Group VIII)‐based Heterogeneous Electrocatalysts for Nitrogen Reduction Reaction

Ru-Based Catalysts for Ammonia Decomposition: A Mini-Review

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