Mesoporous Ru/MgO prepared by a deposition-precipitation method as highly active catalyst for producing COx-free hydrogen from ammonia decomposition

Ju, Xiaohua; Liu, Lin; Pei, Yu; Guo, Jianping; Zhang, Xilun; He, Teng; Wu, Guotao; Chen, Ping

doi:10.1016/j.apcatb.2017.04.043

Cited by 169 publications

(72 citation statements)

References 44 publications

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“…We also compared our results with previous reports of Ru-based catalysts for NH 3 decomposition in the literature (normalized by the Ru loading) and found that our catalysts are among the superior catalysts [ Fig. 5E, data in table S4: reaction temperature 450°C with a gas hourly space velocity (GHSV) of ≥30,000] (23,24,36). The outstanding performance of the MEA-NPs is likely a synergistic effect from the ultrafine size of the NPs (3 to 5 nm), their multi-elemental composition, and their homogeneous alloy structure.…”

Section: Application Of Mea-nps In Catalytic Nh 3 Decompositionmentioning

confidence: 69%

Computationally aided, entropy-driven synthesis of highly efficient and durable multi-elemental alloy catalysts

et al. 2020

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Multi-elemental alloy nanoparticles (MEA-NPs) hold great promise for catalyst discovery in a virtually unlimited compositional space. However, rational and controllable synthesize of these intrinsically complex structures remains a challenge. Here, we report the computationally aided, entropy-driven design and synthesis of highly efficient and durable catalyst MEA-NPs. The computational strategy includes prescreening of millions of compositions, prediction of alloy formation by density functional theory calculations, and examination of structural stability by a hybrid Monte Carlo and molecular dynamics method. Selected compositions can be efficiently and rapidly synthesized at high temperature (e.g., 1500 K, 0.5 s) with excellent thermal stability. We applied these MEA-NPs for catalytic NH 3 decomposition and observed outstanding performance due to the synergistic effect of multielemental mixing, their small size, and the alloy phase. We anticipate that the computationally aided rational design and rapid synthesis of MEA-NPs are broadly applicable for various catalytic reactions and will accelerate material discovery. Computationally aided, entropy-driven synthesis of highly efficient and durable multi-elemental alloy catalysts.(11), eaaz0510. 6 Sci Adv ARTICLE TOOLS

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Section: Application Of Mea-nps In Catalytic Nh 3 Decompositionmentioning

confidence: 69%

Computationally aided, entropy-driven synthesis of highly efficient and durable multi-elemental alloy catalysts

et al. 2020

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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] . However, the generally high loading amount ( > 4 wt%) of Ru [4,7,8] largely limits its wide application because of cost.…”

Section: Introductionmentioning

confidence: 99%

“…http://engine.scichina.com/doi/10.1016/j.jechem.2018.12.024 decomposition [4,9] . However, depositing transition metal nanoparticles on MgO for ammonia decomposition has been rarely explored.…”

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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“…In heterogeneous catalytic NH 3 decomposition, active component is the most critical factor. The catalysts for NH 3 decomposition mainly focused on noble‐metal Ru catalysts, cheap‐metal Fe catalysts, Ni catalysts, Co catalysts, as well as transition metal carbides and nitrides catalysts . Among these catalysts, Ru is the most active metal component .…”

Section: Introductionmentioning

confidence: 99%

Plasma‐assisted ammonia decomposition over Fe–Ni alloy catalysts for CO_x‐Free hydrogen

Wang

Guo

et al. 2018

AIChE Journal

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On‐site ammonia (NH3) decomposition is considered as a potential path to supply CO x‐free hydrogen for fuel cell vehicles. In this article, monometallic catalysts (Fe, Co, Ni, and Mo) and bimetallic catalysts (Fe–Co, Mo–Co, Fe–Ni, and Mo–Ni) were prepared and tested in plasma‐catalytic NH3 decomposition, where 6Fe–4Ni catalyst exhibited the highest activity and synergistic capability with plasma. At 500°C, NH3 were completely decomposed (>99.9% NH3 conversion); the rate of H2 production and the energy consumption of H2 production reached 0.96 mol g−1 h−1 and 0.050 kW h (mol g−1)−1, respectively. The 200 h continuous operation results indicate an excellent durability of 6Fe–4Ni catalyst. The catalysts characterization and plasma diagnosis results indicate that NH3 was pre‐activated by plasma into excited‐state species (NH3, ˙NH2, and ˙NH), and the 6Fe–4Ni catalyst exhibited the highest capability to adsorb excited NH3, ˙NH2, and ˙NH species, which could be the main reason why 6Fe–4Ni catalyst exhibited the highest activity. © 2018 American Institute of Chemical Engineers AIChE J, 65: 691–701, 2019

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Mesoporous Ru/MgO prepared by a deposition-precipitation method as highly active catalyst for producing COx-free hydrogen from ammonia decomposition

Cited by 169 publications

References 44 publications

Computationally aided, entropy-driven synthesis of highly efficient and durable multi-elemental alloy catalysts

Computationally aided, entropy-driven synthesis of highly efficient and durable multi-elemental alloy catalysts

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

Plasma‐assisted ammonia decomposition over Fe–Ni alloy catalysts for CO_x‐Free hydrogen

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Mesoporous Ru/MgO prepared by a deposition-precipitation method as highly active catalyst for producing COx-free hydrogen from ammonia decomposition

Cited by 169 publications

References 44 publications

Computationally aided, entropy-driven synthesis of highly efficient and durable multi-elemental alloy catalysts

Computationally aided, entropy-driven synthesis of highly efficient and durable multi-elemental alloy catalysts

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

Plasma‐assisted ammonia decomposition over Fe–Ni alloy catalysts for COx‐Free hydrogen

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Plasma‐assisted ammonia decomposition over Fe–Ni alloy catalysts for CO_x‐Free hydrogen