Confined small-sized cobalt catalysts stimulate carbon-chain growth reversely by modifying ASF law of Fischer–Tropsch synthesis

Cheng, Qingpeng; Tian, Ye; Lyu, Shuaishuai; Zhao, Na; Ma, Kui; Ding, Tao; Jiang, Zheng; Wang, Lihua; Zhang, Jing; Zheng, Lirong; Gao, Fei; Tsubaki, Noritatsu; Li, Xingang

doi:10.1038/s41467-018-05755-8

Cited by 199 publications

(128 citation statements)

References 51 publications

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“…From references, the modulation of active sites to improve selectivity for CO x conversion owing to confinement effect is generally through the adjustment of size of metallic NPs, which has been used in diverse fields like the production of higher alcohol, and higher hydrocarbon from syngas by suppressing the formation of side-products. [66][67][68][69][70] Moreover, the confinement can also promote the selectivity through stabilizing active phase like CuÀ xÀ Fe 5 C 2 phase in confined spaces. [71] Furthermore, it is generally accepted that many reactions take place at the interface.…”

Section: Improving Selectivity Via Modulation Of Active Sitesmentioning

confidence: 99%

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Zhao

2020

ChemCatChem

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Owing to the depletion of fossil reserves and the global warming by released greenhouse gas from the consumption of fossil resources, the catalytic conversion of carbon oxide (COx, including CO2 and CO) into fuels and high‐value chemicals has attracted tremendous interest in the field of catalysis. Developing high‐performance and practical catalysts with high activity, selectivity, and stability is of great importance but remains a huge challenge. A variety of new strategies were developed to take advantage of confinement effect to address the challenges that are relevant to the highly‐efficient transformation and utilization of COx by performing catalytic reactions in a confined space. The status on this issue can be divided into three aspects: improvement in catalytic activity, increase in catalytic selectivity and enhancement in catalytic stability. In this review, the progress in the field of promoted catalytic conversion of COx in confined spaces will be presented and discussed. Especially, the specific promoting mechanism in terms of the confinement effect for COx‐related transformations in confined spaces and the relationship between the impact of the confined space on the catalytic activity, selectivity, and stability regarding of COx conversions are highlighted. Finally, the future prospects on the opportunities and challenges of catalytic conversion of COx in confined spaces are outlined.

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Section: Improving Selectivity Via Modulation Of Active Sitesmentioning

confidence: 99%

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Zhao

2020

ChemCatChem

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“…The metal clusters represented by dark spots indicate their nonuniform size distribution. In bimetallic catalyst, the palladium and gallium cannot be distinguished, which shows a proper interaction of metals or the formation of the Pd 2 Ga phase …”

Section: Resultsmentioning

confidence: 99%

Influence of reduction temperature on the formation of intermetallic Pd₂Ga phase and its catalytic activity in CO₂ hydrogenation to methanol

Ahmad

Upadhyayula

2019

Greenhouse Gases

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The global warming and change in climatic conditions due to rising concentration of CO2 in atmosphere are the most important challenges of 21st century. Catalytic conversion of CO2 to methanol will not only check global warming but also provide an alternative source of fuel. The phase purity of solid catalysts has a considerable influence on the desired product selectivity. Reduction temperature is one of the most important parameters responsible for catalyst phase formation. Herein, the effect of a range of reduction temperatures between 100 and 600°C on the phase composition of Pd–Ga bimetallic catalyst and CO2 hydrogenation to methanol activity was investigated. X‐ray diffraction (XRD) analysis revealed the formation of different phases at different reduction temperatures. The variation in catalyst structure was also analyzed using field emission scanning electron microscope‐energy dispersive X‐ray spectroscopy (FESEM‐EDS), Brunaue–Emmett–Teller, H2 chemisorption, and transmission electron microscopy techniques. The influence of reduction temperature, pressure (1–25 bar), H2/CO2 ratio (3–9), and reaction temperature (150–250°C) on methanol and CO selectivity from CO2 hydrogenation at atmospheric pressure was also studied. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…Fischer-Tropsch (FT) synthesis is a promising process to convert syngas (CO + H 2 ) derived from non-petroleum-based resources such as coal, biomass, and natural gas to super-clean fuels and high-value-added fine chemicals [1,2]. Cobalt-based catalysts have been widely investigated for FT synthesis due to its high activity, high resistance to deactivation, low water-gas shift activity, and reasonable reservoir [3,4].…”

Section: Introductionmentioning

confidence: 99%

Impact of Coordination Features of Co(II)-Glycine Complex on the Surface Sites of Co/SiO2 for Fischer–Tropsch Synthesis

Hao

Xie

et al. 2020

Catalysts

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To investigate the effect of coordination features of Co(II)-glycine complex on the performance of Co/SiO2 for Fischer–Tropsch (FT) synthesis, Co(II)-glycine complex precursors were prepared by the conventional method, i.e., simply adding glycine to the solution of Co nitrate and novel route, i.e., reaction of glycine with cobalt hydroxide. The SiO2-supported Co catalysts were prepared by using the different Co(II)-glycine complexes. It is found that glycine is an effective chelating agent for improving the dispersion of Co and the mass-specific activity in FT synthesis when the molar ratio of glycine/Co2+ = 3, which is independent to the preparation method in this study. Significantly, the surface Co properties were significantly influenced by the coordination features of the Co2+ and the molar ratio of glycine to Co2+ in the Co(II)-glycine complex. Specifically, the Co(3gly)/SiO2 catalyst prepared by the novel route exhibits smaller and homogenous Co nanoparticles, which result in improved stability compared to Co-3gly/SiO2 prepared by the conventional method. Thus, the newly developed method is more controllable and promising for the synthesis of Co-based catalysts for FT synthesis.

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Confined small-sized cobalt catalysts stimulate carbon-chain growth reversely by modifying ASF law of Fischer–Tropsch synthesis

Cited by 199 publications

References 51 publications

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Influence of reduction temperature on the formation of intermetallic Pd₂Ga phase and its catalytic activity in CO₂ hydrogenation to methanol

Impact of Coordination Features of Co(II)-Glycine Complex on the Surface Sites of Co/SiO2 for Fischer–Tropsch Synthesis

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Confined small-sized cobalt catalysts stimulate carbon-chain growth reversely by modifying ASF law of Fischer–Tropsch synthesis

Cited by 199 publications

References 51 publications

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Influence of reduction temperature on the formation of intermetallic Pd2Ga phase and its catalytic activity in CO2 hydrogenation to methanol

Impact of Coordination Features of Co(II)-Glycine Complex on the Surface Sites of Co/SiO2 for Fischer–Tropsch Synthesis

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Influence of reduction temperature on the formation of intermetallic Pd₂Ga phase and its catalytic activity in CO₂ hydrogenation to methanol