Cobalt-based nanoparticles as catalysts for low temperature hydrogen production by ethanol steam reforming

Garbarino, Gabriella; Riani, Paola; Lucchini, Mattia Alberto; Canepa, F.; Kawale, S.; Busca, Guido

doi:10.1016/j.ijhydene.2012.10.054

Cited by 65 publications

(36 citation statements)

References 37 publications

(37 reference statements)

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“…(4) and (5)): nC 2 H 4 → oligomers + coke (4) CH 4 → 2H 2 + C, H • 298 = +74.9 kJ mol −1 (5) Development of suitable catalysts which are able to produce a H 2 -rich stream with very low CO concentration at medium or low temperature and stable over time is still a challenge [6]. Different catalysts, including supported metals (Ni [7][8][9][10][11][12] and Co [13,14]), supported noble metals [2] and bimetallic catalysts [15][16][17] have been studied for the ESR. Among transition metals, Ni has been widely used as active phase for ethanol-reforming reactions because to its high C C and O H bond-breaking activity [18], its relatively low cost and its known participation in the WGS reaction [19].…”

Section: Introductionmentioning

confidence: 99%

Improved stability of Ni/Al2O3 catalysts by effect of promoters (La2O3, CeO2) for ethanol steam-reforming reaction

et al. 2016

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Section: Introductionmentioning

confidence: 99%

Improved stability of Ni/Al2O3 catalysts by effect of promoters (La2O3, CeO2) for ethanol steam-reforming reaction

et al. 2016

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“…Various reforming catalysts such as Rh [14,15], Ru [16,17], Pd [18,19], Pt [20,21], Co [22,23], and Ni [24][25][26] have been extensively investigated. Among these catalysts, nickel-based catalysts have been widely used for hydrogen production by steam reforming reaction.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production by steam reforming of liquefied natural gas (LNG) over mesoporous Ni/Al2O3 catalyst prepared by an EDTA-assisted impregnation method

Bang

Park

Han

et al. 2016

Applied Catalysis B: Environmental

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“…The calcination also transforms LDH to layered double oxide (LDO) with a spinel (MgAl 2 O 4 )structure by removing intercalated water and carbonateanions [17].Although spinel does not have a layered structure, because the platy morphology of LDH is largely preserved during calcination, the LDH derivative is often referred to as layered double oxide or LDO [18,19]. LDO-supported Co nanoparticles (LDO-Co) have been shown to be active in catalyzing hydrogenation reactions [20][21][22][23],steam reforming [24][25][26][27][28][29][30], aldol condensation [31], thermal decomposition [32,33],oxidation and combustion [34,35], and carbon nanotube synthesis [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Highly active layered double hydroxide-derived cobalt nano-catalysts for p-nitrophenol reduction

Wang

et al. 2016

Applied Catalysis B: Environmental

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and Akron Avenue, Lubbock, TX 79409. AbstractReplacing precious noble-metal catalysts with non-precious metal ones is a well-recognized strategy for reducing the cost of catalytic water treatment. The implementation of this strategy is, however, challenging. To reduce the cost by using non-precious metal catalysts, the reactivity ratio between non-precious and precious metal catalysts must exceed their price ratio. Here, we report for the first timethat the parity condition has been surpassedfor cobalt (Co), in comparison to the most active precious metal catalyst made of palladium,in the catalytic reduction of pnitrophenol with borohydride. This is achieved by affixing Co nanoparticles on two-dimensional layered double oxide (LDO) nanodisks through thermal phase transformation of cobaltmagnesium-aluminum layered double hydroxide precursors. We show that the catalytic activity of LDO-Co is a function of Co molar fraction among metal cations.The highest reactivity is achieved at a molar fraction of 28%, giving a pseudo first order rate constant of 86(±3) min -1 at 25 o C for a catalyst dose of 1 g L -1 (as Co) and an initial p-nitrophenol concentration of 0.2 mM.Compared to other Co nano-catalysts described in the literature, the LDO-Co design has improved the reactivity of cobalt by at least 49 times. We further show that the high reactivity of LDO-Co remains after repeated reuse as well as after borohydride is replaced by formate, a moderate reductant and hydrogen donor. We propose that the high reactivity and superior longevity of LDO-Co are results of the heteroepitaxial fixation of cobalt on LDO through cobaltoxygen bonds that are similar to those in spinel cobalt oxide.

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Cobalt-based nanoparticles as catalysts for low temperature hydrogen production by ethanol steam reforming

Cited by 65 publications

References 37 publications

Improved stability of Ni/Al2O3 catalysts by effect of promoters (La2O3, CeO2) for ethanol steam-reforming reaction

Improved stability of Ni/Al2O3 catalysts by effect of promoters (La2O3, CeO2) for ethanol steam-reforming reaction

Hydrogen production by steam reforming of liquefied natural gas (LNG) over mesoporous Ni/Al2O3 catalyst prepared by an EDTA-assisted impregnation method

Highly active layered double hydroxide-derived cobalt nano-catalysts for p-nitrophenol reduction

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