Synthesis of higher alcohols over highly dispersed Cu–Fe based catalysts derived from layered double hydroxides

Han, Xiaoyu; Fang, Kegong; Zhou, Juan; Zhao, Lu; Sun, Yuhan

doi:10.1016/j.jcis.2015.09.062

Cited by 40 publications

(26 citation statements)

References 42 publications

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“…This may render an optimized rate of C–C bond propagation on iron carbide sites and CO insertion on Cu/Fe 5 C 2 interfacial sites, and thus a high selective toward long-chain alcohols would be achieved. Layered double hydroxides (LDHs), with unique structure that metal cations are distributed in the hydroxide layers at an atomic level, have attracted extensive attention as catalyst precursors for higher alcohols synthesis 10,15,18,28,29 .…”

Section: Introductionmentioning

confidence: 99%

Interfacial Fe5C2-Cu catalysts toward low-pressure syngas conversion to long-chain alcohols

Gao

Peng

et al. 2020

Nat Commun

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Long-chain alcohols synthesis (LAS, C5+OH) from syngas provides a promising route for the conversion of coal/biomass/natural gas into high-value chemicals. Cu-Fe binary catalysts, with the merits of cost effectiveness and high CO conversion, have attracted considerable attention. Here we report a nano-construct of a Fe5C2-Cu interfacial catalyst derived from Cu4Fe1Mg4-layered double hydroxide (Cu4Fe1Mg4-LDH) precursor, i.e., Fe5C2 clusters (~2 nm) are immobilized onto the surface of Cu nanoparticles (~25 nm). The interfacial catalyst exhibits a CO conversion of 53.2%, a selectivity of 14.8 mol% and a space time yield of 0.101 g gcat−1 h−1 for long-chain alcohols, with a surprisingly benign reaction pressure of 1 MPa. This catalytic performance, to the best of our knowledge, is comparable to the optimal level of Cu-Fe catalysts operated at much higher pressure (normally above 3 MPa).

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Section: Introductionmentioning

confidence: 99%

Interfacial Fe5C2-Cu catalysts toward low-pressure syngas conversion to long-chain alcohols

Gao

Peng

et al. 2020

Nat Commun

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“…The mixed oxides typically possessed the large specific surface areas, thermal stability, and synergic interactions between the different metal components. Therefore, LDHs calcination products have found numerous applications in various catalytic processes [10–12]. …”

Section: Introductionmentioning

confidence: 99%

Photocatalytically Enhanced Cationic Dye Removal with Zn-Al Layered Double Hydroxides

Starukh

2017

Nanoscale Res Lett

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Calcined and organo-modified Zn-Al layered double hydroxides (LDHs) were studied as adsorbents and photocatalysts for removal of cationic dye, as namely methylene blue (MB). Zn-Al LDHs with a cationic ratio of 2:4 were obtained by the coprecipitation method. As-synthesized samples were calcined at different temperatures and the phase transformations were investigated by XRD, TG/DTG, and UV–vis-DR methods. The activity of as-synthesized and calcined Zn-Al LDHs under UV light was attributed to the presence of ZnO phase. The amount of ZnO in LDHs can be regulated by varying of Zn/Al ratio and heating temperature. The impact of Zn/Al ratio on photocatalytic activity of LDHs was observed predominant. The calcined Zn-Al LDHs demonstrated low adsorption of MB. The modification of ZnAl LDHs by sodium dodecyl sulfate was performed using a reconstruction method. The organo/LDH nanohybrids demonstrated high adsorption capacity to MB. The removal of MB from solutions with organo/Zn-Al LDHs was enhanced by using UV light due to MB photodestruction.

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“…When acting as an active component, Fe co-exists with Cu nanoparticles in close proximity, favors the formation of alcohol over hydrocarbons. [10a] The interpretation was further supported by others, [11][12][13] where higher alcohol synthesis was favored due to the synergetic effect of the active and stable CuÀ Fe dual sites. The physicochemical properties of the catalysts were significantly influenced by the Cu/Fe molar ratio, which determined the interaction of Cu and Fe, [12][13] thereby affecting the selectivity towards higher alcohols.…”

Section: Effect Of Promotermentioning

confidence: 75%

“…Han and his team [12] investigated the role of layered double hydroxide‐derived copper and iron‐based catalysts for CO hydrogenation to higher alcohols. The study showed that increasing the copper‐to‐iron molar ratio from 0.2 to 1.0 increased the copper reduction temperature and the layer spacing until the ratio reached 0.5, above which both parameters decreased.…”

Section: Co Hydrogenation To Higher Alcoholsmentioning

confidence: 99%

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Recent Progress in CO Hydrogenation over Bimetallic Catalysts for Higher Alcohol Synthesis

et al. 2020

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The conversion of carbon monoxide and hydrogen, generally called synthesis gas, to higher alcohols has gained recent attention. Alcohols can be either transformed into other value‐added products such as ethers or used directly as fuels or fuel additives. Various types of catalysts have been prepared and investigated for the hydrogenation of CO to higher alcohols and improvements are in progress to find a robust catalyst with high activity and selectivity towards higher alcohols. In particular, the role of the bimetallic catalyst having two active sites contributing efficiently to higher alcohol synthesis has been a focus in recent years. Herein, the recent development in bimetallic catalyst preparation and the investigations of the reaction mechanism in CO hydrogenation have been reviewed.

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Synthesis of higher alcohols over highly dispersed Cu–Fe based catalysts derived from layered double hydroxides

Cited by 40 publications

References 42 publications

Interfacial Fe5C2-Cu catalysts toward low-pressure syngas conversion to long-chain alcohols

Interfacial Fe5C2-Cu catalysts toward low-pressure syngas conversion to long-chain alcohols

Photocatalytically Enhanced Cationic Dye Removal with Zn-Al Layered Double Hydroxides

Recent Progress in CO Hydrogenation over Bimetallic Catalysts for Higher Alcohol Synthesis

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