Highly efficient MOF-templated Ni catalyst towards CO selective methanation in hydrogen-rich reformate gases

Ping, Dan; Dong, Xinfa; Zang, Yunhao; Xing, Feng

doi:10.1016/j.ijhydene.2017.04.285

Cited by 27 publications

(14 citation statements)

References 24 publications

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“…During the pyrolysis process, the organic ligands in MIL-125(Ti) were converted to a carbon matrix. This carbon matrix could control the particle size and position of the metal nickel and make the metal nickel nanoparticles be confined into the cavities/channels of MOF derivatives or surrounded by MOF derivatives, preventing their aggregation and leaching. − It is precisely because of being confined into the cavities/channels of MOF derivatives that the nickel metal particles can remain stable during the reaction . These results indicated that the structure showed almost no change under the current reaction conditions and was stable and reusable, which might be ascribed to the stabilizing effect of Ti–O–W bonds.…”

Section: Resultsmentioning

confidence: 93%

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Liu

Zhou

et al. 2020

ACS Sustainable Chem. Eng.

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Direct conversion of cellulose into ethylene glycol is a promising route for transforming sustainable biomass resources into high-value chemicals. Although numerous attempts have been made to exploit tungsten-based hydrogenolysis catalysts in the catalytic conversion of cellulose to ethylene glycol for high conversion rate and selectivity, maintaining catalyst stability remains challenging. Herein, we have developed a Ni−W/M catalyst with good catalytic performance and stability, which were obtained by calcining Ni−W/MIL-125(Ti) precursor. The synthesized catalyst showed good cellulose conversion rate (100%) and ethylene glycol yield (68.7%). The tungsten species was linked to the TiO 2 support by Ti−O−W bonds to reduce loss of the active tungsten component. The formation of new bonds enhanced the catalyst stability and durability, enabling the catalysts to retain high catalytic activity during recycling.

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Section: Resultsmentioning

confidence: 93%

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Liu

Zhou

et al. 2020

ACS Sustainable Chem. Eng.

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“…The main diffraction peaks of as‐synthesized UiO‐66‐NH 2 correspond to those reported previously (Figure S1 b in the Supporting Information) . For the UiO‐66‐NH 2 ‐derived C‐ZrO 2 , two peaks appeared at 30.3° and 50.4° (inset) and corresponded to the (1 1 1) and (2 2 0) lattice planes of tetragonal or monoclinic ZrO 2 . The diffraction peaks of both g‐C 3 N 4 and ZrO 2 were detected in the C‐ZrO 2 /g‐C 3 N 4 heterostructure spectrum (Figure b).…”

Section: Resultsmentioning

confidence: 94%

Anchoring Ni₂P on the UiO‐66‐NH₂/g‐C₃N₄‐derived C‐doped ZrO₂/g‐C₃N₄ Heterostructure: Highly Efficient Photocatalysts for H₂ Production from Water Splitting

Gao

et al. 2018

ChemCatChem

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Constructing heterostructured photocatalysts and depositing an appropriate co‐catalyst to facilitate charge separation are crucial steps to improve photocatalytic H2 evolution from water splitting. Herein, we reported the synthesis of C‐doped ZrO2/g‐C3N4/Ni2P (C‐ZrO2/g‐C3N4/Ni2P) composite based on the UiO‐66‐NH2 material for photocatalytic H2 production under visible‐light irradiation. The optimal H2 evolution rate over C‐ZrO2/g‐C3N4/20 %Ni2P was 10.04 mmol g−1 h−1, which was more than 10 times higher than that of C‐ZrO2/20 %Ni2P (0.90 mmol g−1 h−1). The apparent quantum yield of C‐ZrO2/g‐C3N4/20 %Ni2P at 420 nm reached 35.5 %. A detailed analysis of the action mechanism revealed that the improved photocatalytic activity could be ascribed to the highly efficient spatial separation of the photoinduced charge carriers between C‐ZrO2 and g‐C3N4, as a result of the tightly bound structure of C‐ZrO2/g‐C3N4/20 %Ni2P and its staggered band energy. The presence of the Ni2P co‐catalyst accelerates the surface reaction as well. This work demonstrates that anchoring appropriate co‐catalysts onto a metal–organic framework (MOF)/g‐C3N4‐derived metal oxide/g‐C3N4 hybrid is an effective way to obtain heterostructured photocatalysts for H2 production.

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“…The selectivity of CO methanation ( S CO ) was calculated according to the following Equation ():

S_{CO} goodbreak= \frac{F_{CO}^{in} - F_{CO}^{out}}{F_{{CH}_{4}}^{out}} goodbreak\times 100 %,

where

F_{{CH}_{4}}^{out}

was the outlet flow rate of СH 4 , mmol/min. Generally, a selectivity of greater than 50% was an important indicator for CO‐SMET 29 . Therefore, a suitable working temperature window was defined, in which, the CO outlet concentration was below 10 ppm (ie, CO conversion greater than 99.9%), and the S CO was greater than 50%.…”

Section: Methodsmentioning

confidence: 99%

“…Generally, a selectivity of greater than 50% was an important indicator for CO-SMET. 29 Therefore, a suitable working temperature window was defined, in which, the CO outlet concentration was below 10 ppm (ie, CO conversion greater than 99.9%), and the S CO was greater than 50%.…”

Section: Catalytic Performance Measurementmentioning

confidence: 99%

Zr‐promoted nickel‐rich spinel‐supported Ni catalysts with enhanced performance for selective CO methanation

Ping

Wan

Zhao

et al. 2022

Intl J of Energy Research

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CO selective methanation (CO-SMET) is an efficient hydrogen purification technology for proton exchange membrane fuel cells. The development of nonnoble metal-based catalysts is quite essential and imperative for CO-SMET and has received considerable interest. Herein, a Zr-promoted nickel-rich spinel-supported Ni catalyst (Ni-ZrO 2 /NiAl 2 O 4 ) was acquired by an epoxidedriven sol-gel process and associated co-impregnation method. The usage of ZrO 2 could enhance the reducibility of the Ni oxides and promote the formation of small Ni particles size, then effectively increase the sorption capacities for both H 2 and CO and facilitate the CO dissociation from catalyst surfaces.All these endowed the catalyst with excellent catalytic performance for CO-SMET, which could lower the CO outlet level to less than 10 ppm with the selectivity higher than 50% within a large temperature window (185 C-255 C).Additionally, the catalyst was highly stable with no obvious carbon deposition or performance degradation during the long-term stability test. This work offers a new technical route to build highly efficient nickel-rich spinelsupported catalysts in the production of high-quality hydrogen.

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Highly efficient MOF-templated Ni catalyst towards CO selective methanation in hydrogen-rich reformate gases

Cited by 27 publications

References 24 publications

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Anchoring Ni₂P on the UiO‐66‐NH₂/g‐C₃N₄‐derived C‐doped ZrO₂/g‐C₃N₄ Heterostructure: Highly Efficient Photocatalysts for H₂ Production from Water Splitting

Zr‐promoted nickel‐rich spinel‐supported Ni catalysts with enhanced performance for selective CO methanation

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Highly efficient MOF-templated Ni catalyst towards CO selective methanation in hydrogen-rich reformate gases

Cited by 27 publications

References 24 publications

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Anchoring Ni2P on the UiO‐66‐NH2/g‐C3N4‐derived C‐doped ZrO2/g‐C3N4 Heterostructure: Highly Efficient Photocatalysts for H2 Production from Water Splitting

Zr‐promoted nickel‐rich spinel‐supported Ni catalysts with enhanced performance for selective CO methanation

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Anchoring Ni₂P on the UiO‐66‐NH₂/g‐C₃N₄‐derived C‐doped ZrO₂/g‐C₃N₄ Heterostructure: Highly Efficient Photocatalysts for H₂ Production from Water Splitting