Mesoporous Ruthenium Oxide: A Heterogeneous Catalyst for Water Oxidation

Iqbal, Muhammad N.; Abdel‐Magied, Ahmed F.; Abdelhamid, Hani Nasser; Olsén, Peter; Shatskiy, Andrey; Zou, Xiaodong; Kärkäs, Markus D.; Johnston, Eric V.

doi:10.1021/acssuschemeng.7b02845

Cited by 53 publications

(33 citation statements)

References 45 publications

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“…[ 47 ] Several methods have been reported for hydrogen production. [ 48 ] Among these methods, hydrolysis of hydrides is attractive due to several advantages including high hydrogen storage (1 mol NaBH 4 produces 4 mol H 2 ), which is much more efficient compared to other reported hydrogen storage materials. NaBH 4 has light weight\volume and produces high purity of hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Salts Induced Formation of Hierarchical Porous ZIF‐8 and Their Applications for CO₂ Sorption and Hydrogen Generation via NaBH₄ Hydrolysis

Abdelhamid

2020

Macro Chemistry & Physics

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Despite the great potential of two different pore regimes (hierarchical porous (HP) structure), HP‐zeolitic imidazolate frameworks‐8 (HPZIF‐8) can be efficient catalysts for hydrogen generation via hydride hydrolysis, and as adsorbents for CO2 gas adsorption. Herein, HPZIF‐8, and leaf‐like ZIF (ZIF‐L) are synthesized via a simple and environmentally friendly procedure using layered hydroxide nitrate of zinc (Z5HN) as a metal source and simple inorganic salt as a modulator. Z5HN nanosheets undergo topotactic transformation to simonkolleite (Zn5(OH)8Cl2·H2O) that can be converted to the pure phase of HPZIF‐8. The concentration of the salts tunes the textural properties of the final product. Applications of HPZIF‐8 and ZIF‐L for CO2 sorption exhibit excellent adsorption properties with increases of 25% due to the presence of cations in the frameworks. ZIF‐8 shows exceptional high catalytic activity for hydrogen generation via the hydrolysis of sodium borohydride. The simple synthesis of ZIF‐8 as well as their good performance as adsorbent and catalyst ensure the potential for industrial and commercial uses.

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Section: Introductionmentioning

confidence: 99%

Salts Induced Formation of Hierarchical Porous ZIF‐8 and Their Applications for CO₂ Sorption and Hydrogen Generation via NaBH₄ Hydrolysis

Abdelhamid

2020

Macro Chemistry & Physics

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“…Hydrogen gas is a clean energy source (combustion product is water). [ 22–27 ] It can be generated using several methods such as water splitting or phototrophic microorganisms. [ 22,23,25–29 ] Other methods, [ 30,31 ] including the hydrolysis of hydride (e.g., sodium borohydride, NaBH 4 ), are promising for applications such as direct borohydride fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…[ 22–27 ] It can be generated using several methods such as water splitting or phototrophic microorganisms. [ 22,23,25–29 ] Other methods, [ 30,31 ] including the hydrolysis of hydride (e.g., sodium borohydride, NaBH 4 ), are promising for applications such as direct borohydride fuel cells. [ 32–34 ] Hydrides offer the production of onboard H 2 for applications, [ 35,36 ] such as uncrewed airplanes, fuel‐cell applications, [ 37 ] and proton‐exchange membrane fuel cells.…”

Section: Introductionmentioning

confidence: 99%

Zeolitic imidazolate frameworks (ZIF‐8, ZIF‐67, and ZIF‐L) for hydrogen production

Abdelhamid

2021

Applied Organom Chemis

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Hydride materials have good performance for hydrogen (H2) gas storage and release. The release of H2 gas from hydrides via the hydrolysis process can be improved or controlled using a catalyst. Herein, benzoic acid (BA) and hexamethylenetetramine (HMTA) modulate the synthesis of hierarchical porous zeolitic imidazolate framework‐8 (HFZIF‐8, Zn‐based metal organic frameworks [MOFs]), ZIF‐67 (Co‐based MOFs), and leaf‐like ZIF (ZIF‐L). The mechanistic study for the synthesis procedure of ZIF‐8 revealed an in situ synthesis of zinc hydroxide nitrate nanosheets (100‐ to 150‐nm thickness) with an interplanar distance of 0.97 nm between the layers of zinc hydroxide, Zn5(OH)82+. X‐ray diffraction (XRD) data indicated that benzoate ions replaced nitrate ions (2NO3−) between Zn5(OH)82+ layers leading to an increase in the interplanar distance (from 0.97 nm to 1.9 nm). Zinc hydroxide benzoate nanosheets showed a fast conversion into HPZIF‐8 at room temperature. The concentration of BA and HMTA tuned the porosity of HPZIF‐8, offering a hierarchical micropore–mesopore structure. The prepared materials increased the hydrolysis rate of sodium borohydride. ZIF‐8 and ZIF‐67 prepared using BA showed high catalytic performance in terms of efficiency and reaction time compared with other materials. The result's findings open new avenues for the synthesis of adequate materials for hydrogen generation via the hydrolysis of hydrides.

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“…The water oxidation for O 2 evolution can be categorized into three modes: electrocatalytic water oxidation, chemical water oxidation (a chemical oxidant, such as cericammonium nitrate (CAN) and sodium persulfate, is required), and photocatalytic water oxidation (typically a [Ru(bpy) 3 ] 2+ /S 2 O 8 2– /light system with photocatalytic oxidant and photosensitizer). , Chemical water oxidation is the most basic reaction process comparing with artificial photosynthesis, electrocatalytic water oxidation, photocatalytic water oxidation, and so on. In the past, compounds containing noble metals, such as Ru , and Ir , have been reported as high-efficiency chemocatalytic WOCs (CAN as oxidant) and showed noteworthy performances, but the commercial application of these catalysts are restricted due to their expensive prices and scarcity. Hence, many researchers have invested a great deal of attention on the exploration of new, inexpensive and abundantly available materials with good water oxidizing capabilities.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Bimetallic Catalyst Prepared in Situ from Prussian Blue Analogues for Catalytic Water Oxidation

Guo

Chen

et al. 2019

Ind. Eng. Chem. Res.

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The synergistic catalysis of bimetallic catalysts is one of the important ways to improve the catalytic performance; therefore, the development of efficient bimetallic water oxidation catalysts (WOCs) has received extensive attention. This work proposed a bimetallic Fe 3 O 4 /CuO catalyst prepared in situ from the Cu−Fe Prussian blue analogues precursor, promoting Fe 3 O 4modified CuO as a highly efficient and stable bimetallic WOC. The Fe 3 O 4 /CuO exhibits superior and robust catalytic activity for the oxidation of water. Compared with the reported results, it has a higher O 2 evolution rate of about 4406 μmol•h −1 •g −1 and a maximum value for the yield of O 2 as 83.2%, mainly because of the synergetic effect between Fe 3 O 4 and CuO in the complicated water oxidation reaction (WOR) process. We hope this work will be useful for other researchers to design new transition metal bimetallic catalysts for WOR.

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Mesoporous Ruthenium Oxide: A Heterogeneous Catalyst for Water Oxidation

Cited by 53 publications

References 45 publications

Salts Induced Formation of Hierarchical Porous ZIF‐8 and Their Applications for CO₂ Sorption and Hydrogen Generation via NaBH₄ Hydrolysis

Salts Induced Formation of Hierarchical Porous ZIF‐8 and Their Applications for CO₂ Sorption and Hydrogen Generation via NaBH₄ Hydrolysis

Zeolitic imidazolate frameworks (ZIF‐8, ZIF‐67, and ZIF‐L) for hydrogen production

High-Efficiency Bimetallic Catalyst Prepared in Situ from Prussian Blue Analogues for Catalytic Water Oxidation

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Mesoporous Ruthenium Oxide: A Heterogeneous Catalyst for Water Oxidation

Cited by 53 publications

References 45 publications

Salts Induced Formation of Hierarchical Porous ZIF‐8 and Their Applications for CO2 Sorption and Hydrogen Generation via NaBH4 Hydrolysis

Salts Induced Formation of Hierarchical Porous ZIF‐8 and Their Applications for CO2 Sorption and Hydrogen Generation via NaBH4 Hydrolysis

Zeolitic imidazolate frameworks (ZIF‐8, ZIF‐67, and ZIF‐L) for hydrogen production

High-Efficiency Bimetallic Catalyst Prepared in Situ from Prussian Blue Analogues for Catalytic Water Oxidation

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Product

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Salts Induced Formation of Hierarchical Porous ZIF‐8 and Their Applications for CO₂ Sorption and Hydrogen Generation via NaBH₄ Hydrolysis

Salts Induced Formation of Hierarchical Porous ZIF‐8 and Their Applications for CO₂ Sorption and Hydrogen Generation via NaBH₄ Hydrolysis