Mn-promoted MoS2 catalysts for CO2 hydrogenation: enhanced methanol selectivity due to MoS2/MnOx interfaces

Alves, Gustavo A. S.; Pacholik, Gernot; Pollitt, Stephan; Wagner, Tobias; Rameshan, Raffael; Rameshan, Christoph; Föttinger, Karin

doi:10.1039/d3cy01711g

Cited by 1 publication

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References 51 publications

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“…Alongside transitioning from fossil fuels to renewable energies like hydrogen, carbon recycling-utilizing CO 2 as a resource-emerges as a viable strategy for achieving a carbonneutral society [1]. Fujishima et al introduced a method involving hydrogen extraction through water electrolysis using electricity from high-efficiency solar cells [2] (methodology currently used and highly studied [3]), followed by combining this hydrogen with CO 2 emitted by power plants and factories to produce methanol, a potential energy source [4]. This process transforms carbon-containing gases like CO 2 from greenhouse contributors into valuable resources, substituting oil and natural gas [5].…”

Section: Introductionmentioning

confidence: 99%

Bryophyte-Bioinspired Nanoporous AAO/C/MgO Composite for Enhanced CO2 Capture: The Role of MgO

Cortés-Valadez,

Baños-López,

Hernández-Rodríguez

et al. 2024

Nanomaterials

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A composite material composed of anodized aluminum oxide (AAO), carbon (C), and magnesium oxide (MgO) was developed for CO2 capture applications. Inspired by the bryophyte organism, the AAO/C/MgO composite mirrors two primary features of these species—(1) morphological characteristics and (2) elemental composition—specifically carbon, oxygen, and magnesium. The synthesis process involved two sequential steps: electroanodization of aluminum foil followed by a hydrothermal method using a mixture of glucose and magnesium chloride (MgCl2). The concentration of MgCl2 was systematically varied as the sole experimental variable across five levels—1 mM, 2 mM, 3 mM, 4 mM, and 5 mM—to investigate the impact of MgO formation on the samples’ chemical and physical properties, and consequently, their CO2 capture efficiency. Thus, scanning electron microscopy analysis revealed the AAO substrate’s porous structure, with pore diameters measuring 250 ± 30 nm. The growth of MgO on the AAO substrate resulted in spherical structures, whose diameter expanded from 15 nm ± 3 nm to 1000 nm ± 250 nm with increasing MgCl2 concentration from the minor to major concentrations explored, respectively. X-ray photoelectron spectroscopy (XPS) analysis indicated that carbon serves as a linking agent between AAO and MgO within the composite. Notably, the composite synthesized with a 4 mM MgCl2 concentration exhibited the highest CO2 capture efficiency, as determined by UV-Vis absorbance studies using a sodium carbonate solution as the CO2 source. This efficiency was quantified with a ‘k’ constant of 0.10531, significantly higher than those of other studied samples. The superior performance of the 4 mM MgCl2 sample in CO2 capture is likely due to the optimal density of MgO structures formed on the sample’s surface, enhancing its adsorptive capabilities as suggested by the XPS results.

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Section: Introductionmentioning

confidence: 99%

Bryophyte-Bioinspired Nanoporous AAO/C/MgO Composite for Enhanced CO2 Capture: The Role of MgO

Cortés-Valadez,

Baños-López,

Hernández-Rodríguez

et al. 2024

Nanomaterials

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Mn-promoted MoS₂ catalysts for CO₂ hydrogenation: enhanced methanol selectivity due to MoS₂/MnO_x interfaces

Abstract: Considering the alarming scenario of climate change, CO2 hydrogenation to methanol is considered a key process for phasing out fossil fuels by means of CO2 utilization. In this context, MoS2...

Cited by 1 publication

References 51 publications

Bryophyte-Bioinspired Nanoporous AAO/C/MgO Composite for Enhanced CO2 Capture: The Role of MgO

Bryophyte-Bioinspired Nanoporous AAO/C/MgO Composite for Enhanced CO2 Capture: The Role of MgO

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