Role of surface defects of carbon nanotubes on catalytic performance of barium promoted ruthenium catalyst for ammonia synthesis

Ma, Yongcheng; Lan, Guojun; Fu, Wenzhao; Lai, Ying; Han, Wenfeng; Tang, Haodong; Liu, Huazhang; Li, Ying

doi:10.1016/j.jechem.2019.04.016

Cited by 46 publications

(20 citation statements)

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“…Finally, the stronger interaction of Ru NP with defective CNT (CNT D ) compared to oxygen groups or pristine CNT has been proposed to rationalize the higher catalytic activity of Ba−Ru/CNT D catalysts for ammonia synthesis. 389…”

Section: Chemical Reviewsmentioning

confidence: 99%

A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts

2019

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Fermi level in vii) are shown in purple in ii)-vi) with an iso-value of ±0.003 a.u. Reprinted with permission from ref 57 . Copyright 2014 from the Royal Society of Chemistry; b) Molecular model of a corannulene-like element functionalized with three carboxylic groups from two different perspectives in the cpk representation (on the left). The final structure (190 elements in a cubic cell of 60 Å in size) obtained from random packing of the individual elements (on the right). Cyan: carbon, red: oxygen, white: hydrogen. Reprinted with permission from ref 59 Copyright 2017 from Elsevier; c) Side-views of Ru13 adsorbed on Gr-DV-2COOH site before (on left panel) and after a proton jump (right panel). C atoms are in black, O in red, H in with white and Ru in mocha. Reprinted with permission from ref 60 Copyright 2014 from Elsevier; and d) Spin-density projection in µB/a.u. 2 on the graphene plane around i) the hydrogen chemisorption defect (∆) and ii) the vacancy defect in the a sublattice. Carbon atoms corresponding to the a sublattice (o) and to the b sublattice (•) are distinguished. Simulated STM images of the defects are shown in iii) and iv), respectively. Reprinted with permission from ref 61 .

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Section: Chemical Reviewsmentioning

confidence: 99%

A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts

2019

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“…Compared with that of Fe catalysts, the energy consumption of Ru catalysts would be lessened greatly . Carbon loss during ammonia synthesis, which is interrelated to the methanation and the oxidation of carbon, − leads to the limitations in the stability and the large-scale application of Ru/C catalysts. Consequently, the development of an alternative ruthenium-based ammonia synthesis catalyst with high efficiency and high stability is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Sacrificial Sucrose Strategy Achieved Enhancement of Ammonia Synthesis Activity over a Ceria-Supported Ru Catalyst

Fang

Liu

Zhang

et al. 2021

ACS Sustainable Chem. Eng.

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CeO2-supported Ru catalysts have high hope for ammonia synthesis; however, their industrial application in ammonia synthesis is finite by the presence of the strong metal–support interaction (SMSI) or Ru encapsulation. Herein, a sacrificial sucrose strategy was adopted to prepare a CeO2-supported Ru catalyst without invoking SMSI or Ru encapsulation. Owing to the improvement of the proportion of Ru0, Ce3+ concentration, number of the exposed ruthenium species, and Ru–O–Ce bonds, the catalyst obtained by sacrificial sucrose strategy can adsorb lots of hydrogen species, and a higher proportion of H species desorb by way of forming H2, leading to the increase of ammonia synthesis activity is by 43% in comparison with the catalyst without sucrose sacrifice.

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“…75 Carbon-based materials have been evaluated as promising catalyst support in recent years owing to their advantages of low cost, large surface area, well-developed porosity, and editable surface properties. [85][86][87][88][89][90] To further explore the potential active phase candidates for hydrogenation of NaHCO 3 to NaHCO 2 at 25°C and 1 bar of hydrogen, García's group tested a variety of M/C catalysts including Pd/C, Ru/AC, Ni/AC, Co/AC, and Re/AC (Entry 7-11, Table 1). 76 The 5 wt% Pd/AC catalyst presented better catalytic reactivity compared to other tested Metal/C catalysts, shown in Fig.…”

Section: Monometallic Metal Catalystsmentioning

confidence: 99%

Heterogeneous catalysts for the hydrogenation of amine/alkali hydroxide solvent captured CO₂ to formate: A review

Chen

et al. 2021

Greenhouse Gases

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Carbon capture and utilization technology is one of the medium-term technology options to reduce CO 2 emissions while producing value-added fuels and chemical products. The integrated CO 2 capture and hydrogenation process is an encouraging replacement to the conventional decoupled CO 2 capture and hydrogenation process, which allows direct utilization of captured CO 2 thus eliminating the energy-intensive CO 2 desorption and compression steps in the typical carbon capture and storage (CCS) process. The hydrogenation of captured CO 2 in amine/alkali hydroxide solvents is the key step to attain the integrated CO 2 capture and hydrogenation process. Considering the lack of timely review on the topic of hydrogenation of amine/alkali hydroxide solvent captured CO 2 to formate in the presence of heterogeneous catalysts, a summary of such process with different capturing solvents and heterogeneous catalyst were critically summarized and briefly reviewed in the current paper. The main goal of this review is to provide fundamental insights and guidance for the future design of heterogeneous catalysts for the hydrogenation of captured CO 2 in amine/alkali metal hydroxide-based solvents. Future research directions to advance the process of hydrogenation of captured CO 2 were also recommended.

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Role of surface defects of carbon nanotubes on catalytic performance of barium promoted ruthenium catalyst for ammonia synthesis

Cited by 46 publications

References 50 publications

A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts

A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts

Sacrificial Sucrose Strategy Achieved Enhancement of Ammonia Synthesis Activity over a Ceria-Supported Ru Catalyst

Heterogeneous catalysts for the hydrogenation of amine/alkali hydroxide solvent captured CO₂ to formate: A review

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Role of surface defects of carbon nanotubes on catalytic performance of barium promoted ruthenium catalyst for ammonia synthesis

Cited by 46 publications

References 50 publications

A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts

A Theory/Experience Description of Support Effects in Carbon-Supported Catalysts

Sacrificial Sucrose Strategy Achieved Enhancement of Ammonia Synthesis Activity over a Ceria-Supported Ru Catalyst

Heterogeneous catalysts for the hydrogenation of amine/alkali hydroxide solvent captured CO2 to formate: A review

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Heterogeneous catalysts for the hydrogenation of amine/alkali hydroxide solvent captured CO₂ to formate: A review