Bismuth mobile promoter and cobalt-bismuth nanoparticles in carbon nanotube supported Fischer-Tropsch catalysts with enhanced stability

Gu, Bang; Peron, Deizi V.; Barrios, Alan J.; Virginie, Mirella; Fontaine, Camille La; Briois, Valérie; Vorokhta, Mykhailo; Moldovan, Simona; Koneti, Siddardha; Gambu, Thobani G.; Saeys, Mark; Khodakov, Andreï Y.

doi:10.1016/j.jcat.2021.07.011

Cited by 10 publications

(9 citation statements)

References 57 publications

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“…Experiments with a 20 wt % Co/γ-Al 2 O 3 catalyst showed that promotion with 0.5 wt % boron reduced deactivation rates 6-fold . A somewhat similar effect has been reported for bismuth . DFT calculations again suggest that bismuth binds preferentially at step-edge sites.…”

Section: Molecular Views Of the Active Site And Structure Of Co- And ...supporting

confidence: 62%

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Molecular Views on Fischer–Tropsch Synthesis

2023

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For nearly a century, the Fischer–Tropsch (FT) reaction has been subject of intense debate. Various molecular views on the active sites and on the reaction mechanism have been presented for both Co- and Fe-based FT reactions. In the last 15 years, the emergence of a surface-science- and molecular-modeling-based bottom-up approach has brought this molecular picture a step closer. Theoretical models provided a structural picture of the Co catalyst particles. Recent surface science experiments and density functional theory (DFT) calculations highlighted the importance of realistic surface coverages, which can induce surface reconstruction and impact the stability of reaction intermediates. For Co-based FTS, detailed microkinetic simulations and mechanistic experiments are moving toward a consensus about the active sites and the reaction mechanism. The dynamic phase evolution of Fe-based catalysts under the reaction conditions complicates identification of the surface structure and the active sites. New techniques can help tackle the combinatorial complexity in these systems. Experimental and DFT studies have addressed the mechanism for Fe-based catalysts; the absence of a clear molecular picture of the active sites, however, limits the development of a molecular view of the mechanism. Finally, direct CO2 hydrogenation to long-chain hydrocarbons could present a sustainable pathway for FT synthesis.

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Section: Molecular Views Of the Active Site And Structure Of Co- And ...supporting

confidence: 62%

“…177 A somewhat similar effect has been reported for bismuth. 178 DFT calculations again suggest that bismuth binds preferentially at step-edge sites.…”

Section: Surface Reconstructionsmentioning

confidence: 90%

Molecular Views on Fischer–Tropsch Synthesis

2023

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“…A newly emerging mobile metal (also denoted as liquid metal) promoter such as Bi, Pb, Sn, and Sb has gained growing attention due to its significant effect on catalytic activity and stability. ,− The mobile metal with a relatively lower melting point can migrate over the Co/Fe surface with the formation of larger spherical metal droplets encapsulating the FT metal during the reaction process. It is proposed that the metallic Bi, in close contact with FT metal, can timely scavenge the O atoms dissociated from CO, and the as-obtained oxidized Bi species are easily again reduced to the metallic state during the syngas conversion process.…”

Section: Traditional Fischer–tropsch Synthesismentioning

confidence: 99%

Advances in Selectivity Control for Fischer–Tropsch Synthesis to Fuels and Chemicals with High Carbon Efficiency

Lin

et al. 2022

ACS Catal.

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Fischer–Tropsch synthesis (FTS) is a versatile technology to produce high-quality fuels and key building-block chemicals from syngas derived from nonpetroleum carbon resources such as coal, natural gas, shale gas, biomass, solid waste, and even CO2. However, the product selectivity of FTS is always limited by the Anderson–Schulz–Flory (ASF) distribution, and the key scientific problems including selectivity control, energy saving, and CO2 emission reduction still challenge the current FTS technology. Herein, we review recent significant progress in the field of FTS to obtain specific target products including fuels, olefins, aromatics, and higher alcohols with high selectivity. These achievements are enabled by developing highly efficient catalysts and a controlled reaction pathway based on an integrated process. The structural nature of catalytic active sites and established structure–performance relationships are clarified. Moreover, we specially focus on the carbon utilization efficiency, and the efforts to tune the preferential formation of value-added chemicals and strategies to reduce CO2 selectivity are summarized. The challenges and the perspectives for future FTS technology development with high carbon efficiency are also discussed.

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“…Thus, bismuth compounds are usually accepted as biologically safe and nontoxic materials 1 , 2 and have found wide application as antibacterial and antifungal agents, 3 − 6 for example, bismuth sulfonates that are effective against H. pylori even when compared to commercial drugs. 7 In solid-state chemistry, bismuth compounds have been studied in important applications including high TC superconductors, 8 ferroelectric and piezoelectric materials, 9 oxide ion conductors, 10 , 11 catalysis, 12 − 16 thermoelectric materials, 17 among others. In the view of this, bismuth appears as an excellent candidate to be used in the construction of metal–organic frameworks (MOFs) because they and their derivatives are a class of emerging promising coordination materials.…”

Section: Introductionmentioning

confidence: 99%

“…pylori even when compared to commercial drugs . In solid-state chemistry, bismuth compounds have been studied in important applications including high TC superconductors, ferroelectric and piezoelectric materials, oxide ion conductors, , catalysis, − thermoelectric materials, among others. In the view of this, bismuth appears as an excellent candidate to be used in the construction of metal–organic frameworks (MOFs) because they and their derivatives are a class of emerging promising coordination materials.…”

Section: Introductionmentioning

confidence: 99%

Building a Green, Robust, and Efficient Bi-MOF Heterogeneous Catalyst for the Strecker Reaction of Ketones

et al. 2022

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In this work, we present the new [Bi 14 (μ 3 -O) 9 (μ 4 -O) 2 (μ 3– OH) 5 (3,5-DSB) 5 (H 2 O) 3 ]·7H 2 O , BiPF-4 (bismuth polymeric framework—4) MOF, its microwave hydrothermal synthesis, as well as its behavior as a heterogeneous catalyst in the multicomponent organic Strecker reaction. The BiPF-4 material shows a three-dimensional (3D) framework formed by peculiar inorganic oxo-hydroxo-bismutate layers connected among them through the 3,5-dsb (3,5-disulfobenzoic acid) linker. These two-dimensional (2D) layers, built by junctions of Bi7 polyhedra SBU, provide the material of many Lewis acid catalytic sites because of the mixing in the metal coordination number. BiPF-4 is a highly robust, green, and stable material that demonstrates an excellent heterogeneous catalytic activity in the multicomponent Strecker reaction of ketones carried out in one-pot synthesis, bringing a reliable platform of novel green materials based on nontoxic and abundant metal sources such as bismuth.

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Bismuth mobile promoter and cobalt-bismuth nanoparticles in carbon nanotube supported Fischer-Tropsch catalysts with enhanced stability

Cited by 10 publications

References 57 publications

Molecular Views on Fischer–Tropsch Synthesis

Molecular Views on Fischer–Tropsch Synthesis

Advances in Selectivity Control for Fischer–Tropsch Synthesis to Fuels and Chemicals with High Carbon Efficiency

Building a Green, Robust, and Efficient Bi-MOF Heterogeneous Catalyst for the Strecker Reaction of Ketones

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