Methanol Economy Versus Hydrogen Economy

Gumber, Siddharth; Gurumoorthy, Anand V.P.

doi:10.1016/b978-0-444-63903-5.00025-x

Cited by 17 publications

(19 citation statements)

References 9 publications

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“…Methanol is particularly attractive in the overall context of sustainability because it can be directly used as a fuel or be converted to a wide range of chemicals such as formaldehyde, dimethyl ether, olefins, hydrocarbon fuels, etc . 8 − 10 …”

Section: Introductionmentioning

confidence: 99%

Ni–In Synergy in CO₂ Hydrogenation to Methanol

et al. 2021

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Indium oxide (In 2 O 3 ) is a promising catalyst for selective CH 3 OH synthesis from CO 2 but displays insufficient activity at low reaction temperatures. By screening a range of promoters (Co, Ni, Cu, and Pd) in combination with In 2 O 3 using flame spray pyrolysis (FSP) synthesis, Ni is identified as the most suitable first-row transition-metal promoter with similar performance as Pd–In 2 O 3 . NiO–In 2 O 3 was optimized by varying the Ni/In ratio using FSP. The resulting catalysts including In 2 O 3 and NiO end members have similar high specific surface areas and morphology. The main products of CO 2 hydrogenation are CH 3 OH and CO with CH 4 being only observed at high NiO loading (≥75 wt %). The highest CH 3 OH rate (∼0.25 g MeOH /(g cat h), 250 °C, and 30 bar) is obtained for a NiO loading of 6 wt %. Characterization of the as-prepared catalysts reveals a strong interaction between Ni cations and In 2 O 3 at low NiO loading (≤6 wt %). H 2 -TPR points to a higher surface density of oxygen vacancy (O v ) due to Ni substitution. X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and electron paramagnetic resonance analysis of the used catalysts suggest that Ni cations can be reduced to Ni as single atoms and very small clusters during CO 2 hydrogenation. Supportive density functional theory calculations indicate that Ni promotion of CH 3 OH synthesis from CO 2 is mainly due to low-barrier H 2 dissociation on the reduced Ni surface species, facilitating hydrogenation of adsorbed CO 2 on O v .

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Section: Introductionmentioning

confidence: 99%

Ni–In Synergy in CO₂ Hydrogenation to Methanol

et al. 2021

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“…Methanol-based fuel cells (MFCs) are more reliable than conventional H2 fuel cells, as liquid methanol is easier to store and transport than hydrogen gas. 1,2 Although platinum is widely used as (electro)catalyst in the dehydrogenation of methanol (CH3OH), 3,4 its performance is limited by its modest stability and selectivity. [5][6][7] The three main drawbacks of platinum-based anode catalysts are their high cost as methanol bonds breaking requires large amounts of catalyst, 8 their low selectivity to generate hydrogen as end product, and their low stability in presence of carbon monoxide, a by-product of methanol dissociation (i.e.…”

Section: Introductionmentioning

confidence: 99%

Composition-Tuned Pt-Skinned PtNi Bimetallic Clusters as Highly Efficient Methanol Dehydrogenation Catalysts

et al. 2019

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Platinum is the most active anode and cathode catalyst in next-generation fuel cells using methanol as liquid source of hydrogen. Its catalytic activity can be significantly improved by alloying with 3d metals, although a precise tuning of its surface architecture is still required. Herein, we report the design of a highly active low temperature (below 0 • C) methanol dehydrogenation anode catalyst with reduced CO poisoning, based on ultra-low amount of precisely-defined PtxNi1-x (x = 0 to 1) bimetallic clusters (BCs) deposited on inert flat oxides by Cluster Beam Deposition (CBD). These BCs feature clear composition-dependent atomic arrangements and electronic structures stemming from their nucleation mechanism that are responsible for a volcano-type activity trend peaking at the Pt0.7Ni0.3 composition. Our calculations reveal that at this composition a cluster skin of Pt atoms with d-band centres downshifted by subsurface Ni atoms weakens the CO interaction that in turn triggers a significant increase in the methanol dehydrogenation activity.

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“…Liquid organic hydrogen carriers (LOHCs) have been gaining considerable interest as hydrogen storage medias because they possess high hydrogen capacity (5–8 wt %), large annual production (annual global productions of quinoline derivatives, benzene, and toluene are approximately >2000 ton/year, 5 × 10 7 ton/year, and 1 × 10 7 ton/year, − respectively), reversibility, and compatibility with existing gasoline infrastructures with minimal modification. Several promising systems have been developed, − for instance, cycloalkanes, − N-heterocycles, , formic acid, , methanol, , etc. Among these candidates, much attention has been given to N-heterocycles represented by N -ethylcarbazole (NEC), quinoline, and indole.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of Catalysis in the Hydrogenation and Dehydrogenation of N-Heterocycles for Hydrogen Storage

Tan

Chua

et al. 2021

J. Phys. Chem. C

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Lack of efficient hydrogen storage method is one of the technical bottlenecks for the implementation of hydrogen energy. Liquid organic hydrogen carriers (LOHCs), especially Nheterocycles, have been considered as potential candidates for both on-board and off-board hydrogen storage owing to their low cost, high gravimetric hydrogen storage capacity, reversibility, and compatibility with the existing infrastructures with minimal modification. LOHCs however encounter severe kinetic barriers in the hydrogen uptake and release processes, and thus efficient catalysts are critically needed. Much attention has been given to the design and development of catalysts for the reversible hydrogenation and dehydrogenation of N-heterocycles. In this Mini-Review Article, we summarize recent activities in advancing those compounds for hydrogen storage through thermo-, photo-, and electrocatalysis, aiming to provide a guidance for rational catalyst design. At the end of the Mini-Review Article, challenges and future research directions of the catalyst design in the LOHCs field are discussed.

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Methanol Economy Versus Hydrogen Economy

Cited by 17 publications

References 9 publications

Ni–In Synergy in CO₂ Hydrogenation to Methanol

Ni–In Synergy in CO₂ Hydrogenation to Methanol

Composition-Tuned Pt-Skinned PtNi Bimetallic Clusters as Highly Efficient Methanol Dehydrogenation Catalysts

Recent Advances of Catalysis in the Hydrogenation and Dehydrogenation of N-Heterocycles for Hydrogen Storage

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Methanol Economy Versus Hydrogen Economy

Cited by 17 publications

References 9 publications

Ni–In Synergy in CO2 Hydrogenation to Methanol

Ni–In Synergy in CO2 Hydrogenation to Methanol

Composition-Tuned Pt-Skinned PtNi Bimetallic Clusters as Highly Efficient Methanol Dehydrogenation Catalysts

Recent Advances of Catalysis in the Hydrogenation and Dehydrogenation of N-Heterocycles for Hydrogen Storage

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Ni–In Synergy in CO₂ Hydrogenation to Methanol

Ni–In Synergy in CO₂ Hydrogenation to Methanol