Silica rich MIL-101(Cr) for enhanced hydrogen uptake

Panchariya, Dharmendra K.; Rohit, K.; Kumar, E. Anil; Singh, Sanjay Kumar

doi:10.1007/s10934-018-0710-4

Cited by 12 publications

(32 citation statements)

References 56 publications

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“…An apparent color change from light green (for undoped RHA‐MIL‐101) to olive green (for x Li‐RHA‐MIL‐101) can also be seen during the synthesis of Li‐doped RHA‐MIL‐101 (Figure S1) . PXRD patterns (Figure a) of the synthesized x Li‐RHA‐MIL‐101 with varying Li + ion doping are consistent with the undoped RHA‐MIL‐101, suggesting the framework structure and the crystallinity of RHA‐MIL‐101 are intact upon Li + ion doping. FTIR of the x Li‐RHA‐MIL‐101 corroborated well with that of undoped RHA‐MIL‐101 (Figure b and Figure S2).…”

Section: Resultsmentioning

confidence: 79%

“…At an outset, we synthesized RHA‐MIL‐101 by incorporating rice husk ash (RHA) in situ during the synthesis of MIL‐101, following our previously reported procedure . We demonstrated that RHA‐MIL‐101 exhibited high thermal and chemical stability, tuned porous structure and enhanced hydrogen uptake properties and herein, was further modified RHA‐MIL‐101 by Li + ion doping and systematically investigated the effect of Li + ion doping on the hydrogen storage properties of Li‐doped RHA‐MIL‐101.…”

Section: Resultsmentioning

confidence: 99%

“…The presence of characteristics bands for Si−OH (1637 cm −1 ), Si‐ O ‐Si (585 cm −1 ) and Si−O (801 cm −1 ) evidenced the presence of silica‐rich rice husk ash (RHA) in x Li‐RHA‐MIL‐101. Moreover, the appearance of bands at 1400 cm −1 and 1511 cm −1 corresponding to O‐C‐O symmetric vibration (dicarboxylate) and C=C stretching vibration (benzene ring) inferred the presence of MIL‐101 framework …”

Section: Resultsmentioning

confidence: 99%

“…Exchanging piperazine (ppz) in NOTT‐200 with Li + ion also showed an enhancement in H 2 uptake from 0.96 wt % (ppz‐NOTT‐200) to 1.02 wt % (Li + ‐NOTT‐201), albeit the enhancement was attributed to the increase in porosity by replacing the bulky ppz with Li + ion . On the other hand, hybrid composites of MOFs synthesized by incorporation of activated carbon (AC‐MIL‐101), carbon nanotubes (SWCNT‐MIL‐101) or silica‐rich rich husk ash (RHA‐MIL‐101) have shown improved hydrogen uptake properties, owing to the enhancement in interactions with H 2 molecules . Further, doping Li + ions in the hybrid composite AC‐MIL‐101, Deschamps et al.…”

Section: Introductionmentioning

confidence: 99%

“…Previously, we investigated the hydrogen uptake properties of RHA‐MIL‐101 (RHA is rice husk ash), where the observed enhancement in hydrogen uptake properties is attributed to the plausible involvement of silanol bonds to H 2 molecules interactions and pore‐tuning due to the incorporation of silica‐rich RHA in MIL‐101 . Here in, we are interested to further enhance the H 2 uptake capacity of RHA‐MIL‐101 by Li + ion doping.…”

Section: Introductionmentioning

confidence: 99%

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Lithium‐Doped Silica‐Rich MIL‐101(Cr) for Enhanced Hydrogen Uptake

Panchariya

Kumar

Singh

2019

Chemistry An Asian Journal

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Metal-organic frameworks (MOFs) show promising characteristics for hydrogen storagea pplication.I nt his direction, modification of under-utilized large pore cavities of MOFs has been extensively explored as ap romising strategy to further enhancet he hydrogen storage properties of MOFs. Here, we describedasimple methodology to enhance the hydrogen uptake properties of RHA incorporated MIL-101 (RHA-MIL-101,w here RHA is rice husk ash-a waste material) by controlled doping of Li + ions. The hydrogen gas uptake of Li-doped RHA-MIL-101 is significantly higher (up to 72 %) compared to the undoped RHA-MIL-101, where the content of Li + ions dopingg reatly influenced the hydrogen uptake properties. We attributed the observed enhancement in the hydrogen gas uptake of Li-dopedR HA-MIL-101 to the favorableL i + ion-to-H 2 interactions and the cooperative effect of silanol bonds of silica-rich rice-huska sh incorporated in MIL-101.[b] Dr.

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Lithium‐Doped Silica‐Rich MIL‐101(Cr) for Enhanced Hydrogen Uptake

Panchariya

Kumar

Singh

2019

Chemistry An Asian Journal

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Elucidating Improvements to MIL‐101(Cr)’s Porosity and Particle Size Distributions based on Innovations and Fine‐Tuning in Synthesis Procedures

Wee

Chinnappan

Ramakrishna

2023

Adv Materials Inter

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Among the existing metal–organic frameworks (MOFs), MIL‐101(Cr) is renowned for its stability in air and water. As a result, MIL‐101(Cr) has numerous potential applications ranging from adsorptive cooling to catalysis. The industrial‐scale production of MIL‐101(Cr) is necessary before realizing these applications. Yet, there remain two main bottlenecks in preparing MIL‐101(Cr) in bulk: the toxicity of hydrofluoric acid (HF) used in conventional MIL‐101(Cr) synthesis and the challenge of ensuring that the as‐prepared MIL‐101(Cr) is highly porous with specific Brunauer–Emmett–Teller surface area (SBET) above 4000 m2 g−1. On the laboratory scale, MIL‐101(Cr) often presents SBET 2300–3500 m2 g−1. The synthesis and purification procedures often influence the yield, particle size, porosity, and other properties of MIL‐101(Cr). This critical review examines trends in MIL‐101(Cr) preparation procedures and the MOF's resulting properties to elucidate areas for improvement toward its real‐world applications. The purification processes for conventional HF‐based MIL‐101(Cr) whereby porosities vary despite the same synthesis approach are first investigated. Next, the reported additives for substituting HF and their influence on the resulting MIL‐101(Cr)’s porosity and particle size are discussed. The selection of additives may be application‐specific: exemplified in the examination of MIL‐101(Cr)’s preparation, its corresponding water sorption capacity, and desiccant‐related applications.

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Nickel‐doped Co₃O₄ electrocatalyst derived from bimetal zeolitic imidazolate frameworks for the oxygen evolution reaction of electrolysis

Kurbanjan

et al. 2023

Applied Organom Chemis

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Oxygen evolution reaction (OER), as a multi‐step coupled anode reaction, is more sluggish in kinetics than electrocatalytic hydrogen evolution reaction (HER). In order to overcome the potential barrier in OER, it is necessary to develop high‐efficient non‐noble metal catalysts for energy utilization. In this work, several NiCo‐ZIF materials with different molar ratios of Ni and Co were prepared by doping Ni2+ in the preparation of ZIF‐67 via a simple room temperature stirring method. After that, NiCo‐ZIF was calcined at 350°C in a muffle furnace to obtain corresponding Ni‐doped Co3O4 (Ni‐Co3O4). Ni‐Co3O4 catalyst exhibits a low overpotential (η ≈ 203 mV @10 mA cm−2), a small Tafel slope (111.0 mV dec−1) and prominent stability for OER in 1 M KOH solution, which is higher than for a commercially available Ir/C electrocatalyst (η ≈ 350 mV @10 mA cm−2). The higher electrochemical performance should be largely ascribed to the introduction of oxygen vacancies resulting from the Ni doping, which leads to the improved electrochemical active surface area (122.81 mF cm−2) and the topological structure of the dodecahedron, which is in favor of the good contact area between the catalyst and the electrolyte. The design and synthesis of ZIF‐derived catalyst in this work create a significative method to prepare efficient OER electrocatalysts.

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Silica rich MIL-101(Cr) for enhanced hydrogen uptake

Cited by 12 publications

References 56 publications

Lithium‐Doped Silica‐Rich MIL‐101(Cr) for Enhanced Hydrogen Uptake

Lithium‐Doped Silica‐Rich MIL‐101(Cr) for Enhanced Hydrogen Uptake

Elucidating Improvements to MIL‐101(Cr)’s Porosity and Particle Size Distributions based on Innovations and Fine‐Tuning in Synthesis Procedures

Nickel‐doped Co₃O₄ electrocatalyst derived from bimetal zeolitic imidazolate frameworks for the oxygen evolution reaction of electrolysis

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Silica rich MIL-101(Cr) for enhanced hydrogen uptake

Cited by 12 publications

References 56 publications

Lithium‐Doped Silica‐Rich MIL‐101(Cr) for Enhanced Hydrogen Uptake

Lithium‐Doped Silica‐Rich MIL‐101(Cr) for Enhanced Hydrogen Uptake

Elucidating Improvements to MIL‐101(Cr)’s Porosity and Particle Size Distributions based on Innovations and Fine‐Tuning in Synthesis Procedures

Nickel‐doped Co3O4 electrocatalyst derived from bimetal zeolitic imidazolate frameworks for the oxygen evolution reaction of electrolysis

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Product

Resources

About

Nickel‐doped Co₃O₄ electrocatalyst derived from bimetal zeolitic imidazolate frameworks for the oxygen evolution reaction of electrolysis