Photocatalytic production of H<sub>2</sub>O<sub>2</sub> over facet-dependent Ti-MOF

Zheng, Yuanzhou; Zhou, Hualan; Zhou, Bosen; Mao, Jiangchen; Zhao, Yinghao

doi:10.1039/d1cy02166d

Cited by 38 publications

(22 citation statements)

References 36 publications

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“…Notably, among previously reported MOF photocatalysts, Ni/Hf-0.5 exhibited the highest H 2 O 2 production from O 2 and water (Table S4). , The Ni/Hf-0.5 showed good reusability and high stability after three cycles (Figure S13).…”

Section: Resultsmentioning

confidence: 99%

Boosting Photocatalytic Hydrogen Peroxide Production from Oxygen and Water Using a Hafnium-Based Metal–Organic Framework with Missing-Linker Defects and Nickel Single Atoms

et al. 2022

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Metal–organic frameworks (MOFs) are one of the most promising candidates for photocatalytic hydrogen peroxide (H2O2) production from dioxygen (O2) and water. However, MOF-driven H2O2 production from O2 and water remains a challenge because MOF photocatalysts need to exhibit high structural stability in aqueous reaction systems while suppressing H2O2 decomposition. In the present study, we demonstrate that a Hf-based UiO-66-NH2 with missing-linker defects and Ni single atoms dramatically promotes the photocatalytic production of H2O2 from O2 and water under visible-light (λ > 420 nm) irradiation. The acetate-capped missing-linker defects lead to suppression of the nonradiative relaxation of organic linkers and to the prevention of H2O2 decomposition, whereas the Ni single-atom cocatalysts promote the separation of photogenerated charges and selective two-electron oxidation of water to generate H2O2. The synergetic effect of missing-linker defects and Ni single atoms dramatically improves photocatalytic H2O2 production, resulting in a 6.3-fold increase in activity compared with that of pristine Hf-UiO-66-NH2. This study provides not only new insights into defect engineering in MOF photocatalysts but also an important strategy for achieving highly selective H2O2 production via O2 reduction and water oxidation.

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Section: Resultsmentioning

confidence: 99%

Boosting Photocatalytic Hydrogen Peroxide Production from Oxygen and Water Using a Hafnium-Based Metal–Organic Framework with Missing-Linker Defects and Nickel Single Atoms

et al. 2022

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“…This inevitably brings environmental protection issues and safety issues . However, it is worth noting that more than two-thirds of the end-use applications require low concentrations of H 2 O 2 less than 9 wt % with small-scale production. , Thus, market, environmental, and economic factors have led to a strong interest in other routes to produce H 2 O 2 in a green yet small-scale manner such as electrochemical, − photocatalytic, , and thermal catalytic approaches. , The thermal catalytic direct synthesis of hydrogen peroxide (DSHP) is particularly attractive as a green production process with the highest atomic utilization in theory and could avoid complex reaction steps. , In addition, the DSHP can be implemented at the site of use, and it has the advantages of small-scale production and low investment cost . It can also be combined with other industrial production, such as HPPO production (H 2 O 2 oxidation of propylene oxide to propylene oxide) and oxime production (H 2 O 2 oxidation of cyclohexanone aminoxime to oxime) .…”

Section: Introductionmentioning

confidence: 99%

Pd–Sn Alloy Catalysts for Direct Synthesis of Hydrogen Peroxide from H₂ and O₂ in a Microchannel Reactor

Yang

Hao

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

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Direct synthesis of hydrogen peroxide (DSHP) from H 2 and O 2 offers a promising alternative to the present commercial anthraquinone method, but it still faces the challenges of low H 2 O 2 productivity, low stability of catalysts, and high risk of explosion. Herein, by loading in a microchannel reactor, the assynthesized Pd−Sn alloy materials exhibit high catalytic activity for H 2 O 2 production, presenting a H 2 O 2 productivity of 3124 g kg Pd −1 h −1 . The doped Sn atoms on the surface of Pd not only facilitate the release of H 2 O 2 but also effectively slow down the deactivation of catalysts. Theoretical calculations demonstrate that the Pd−Sn alloy surface has the property of antihydrogen poisoning, showing higher activity and stability than pure Pd catalysts. The deactivation mechanism of the catalyst was elucidated, and the online reactivation method was developed. In addition, we show that the long-life Pd−Sn alloy catalyst can be achieved by supplying an intermittent flow of hydrogen gas. This work provides guidance on how to prepare high performance and stable Pd−Sn alloy catalysts for the continuous and direct synthesis of H 2 O 2 .

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“…Many semiconducting photocatalysts have been investigated, including TiO 2 , BiVO 4 , MoS 2 , WO 3 , NH 2 -MIL-125 and C 3 N 4 (CN). 2,3 CN has attracted significant attention and has been widely researched in the field of photocatalysis due to its suitable band gap (∼2.7 eV), easy synthesis, non-toxicity, low-cost semiconductor properties, and favorable chemical stability. 4…”

Section: Introductionmentioning

confidence: 99%

Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition

Song

Shao

Chen

et al. 2022

Phys. Chem. Chem. Phys.

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Photocatalytic production of H₂O₂ over facet-dependent Ti-MOF

Abstract: In the past several years, Two phases photocatalysts, such as PDI/C3N4, ZIF/C3N4 or Cu2(OH)PO4/C3N4, were used for H2O2 photo-production. Few monocomponent photocatalysts for H2O2 production were reported. In the monocomponent...

Cited by 38 publications

References 36 publications

Boosting Photocatalytic Hydrogen Peroxide Production from Oxygen and Water Using a Hafnium-Based Metal–Organic Framework with Missing-Linker Defects and Nickel Single Atoms

Boosting Photocatalytic Hydrogen Peroxide Production from Oxygen and Water Using a Hafnium-Based Metal–Organic Framework with Missing-Linker Defects and Nickel Single Atoms

Pd–Sn Alloy Catalysts for Direct Synthesis of Hydrogen Peroxide from H₂ and O₂ in a Microchannel Reactor

Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition

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Photocatalytic production of H2O2 over facet-dependent Ti-MOF

Abstract: In the past several years, Two phases photocatalysts, such as PDI/C3N4, ZIF/C3N4 or Cu2(OH)PO4/C3N4, were used for H2O2 photo-production. Few monocomponent photocatalysts for H2O2 production were reported. In the monocomponent...

Cited by 38 publications

References 36 publications

Boosting Photocatalytic Hydrogen Peroxide Production from Oxygen and Water Using a Hafnium-Based Metal–Organic Framework with Missing-Linker Defects and Nickel Single Atoms

Boosting Photocatalytic Hydrogen Peroxide Production from Oxygen and Water Using a Hafnium-Based Metal–Organic Framework with Missing-Linker Defects and Nickel Single Atoms

Pd–Sn Alloy Catalysts for Direct Synthesis of Hydrogen Peroxide from H2 and O2 in a Microchannel Reactor

Visible light-driven H2O2 synthesis over Au/C3N4: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H2O2 decomposition

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Photocatalytic production of H₂O₂ over facet-dependent Ti-MOF

Pd–Sn Alloy Catalysts for Direct Synthesis of Hydrogen Peroxide from H₂ and O₂ in a Microchannel Reactor

Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition