Disordered-Layer-Mediated Reverse Metal–Oxide Interactions for Enhanced Photocatalytic Water Splitting

Cho, Yoonjun; Park, Bumsu; Padhi, Deepak Kumar; Ibrahim, I. I.; Kim, Sungsoon; Kim, Kwang Hee; Lee, Kug‐Seung; Lee, Chang‐Lyoul; Han, Jeong Woo; Oh, Sang Ho; Park, Jae Hyung

doi:10.1021/acs.nanolett.1c01368

Cited by 24 publications

(15 citation statements)

References 45 publications

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“…To realize visible-driven methane oxidation by O 2 gas on narrow bandgap photocatalysts, the cocatalyst is crucial that not only promotes charge separation, but more importantly manipulates the activation energy of the methane conversion and the selectivity 35 – 40 . Furthermore rationally regulating the production of reactive oxygen species (ROS) through cocatalyst modification is necessary as ·OH radicals have been widely regarded as the main species that induced CH 4 activation and overoxidation 41 , 42 .…”

Section: Introductionmentioning

confidence: 99%

Synergy of Pd atoms and oxygen vacancies on In2O3 for methane conversion under visible light

et al. 2022

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Methane (CH4) oxidation to high value chemicals under mild conditions through photocatalysis is a sustainable and appealing pathway, nevertheless confronting the critical issues regarding both conversion and selectivity. Herein, under visible irradiation (420 nm), the synergy of palladium (Pd) atom cocatalyst and oxygen vacancies (OVs) on In2O3 nanorods enables superior photocatalytic CH4 activation by O2. The optimized catalyst reaches ca. 100 μmol h−1 of C1 oxygenates, with a selectivity of primary products (CH3OH and CH3OOH) up to 82.5%. Mechanism investigation elucidates that such superior photocatalysis is induced by the dedicated function of Pd single atoms and oxygen vacancies on boosting hole and electron transfer, respectively. O2 is proven to be the only oxygen source for CH3OH production, while H2O acts as the promoter for efficient CH4 activation through ·OH production and facilitates product desorption as indicated by DFT modeling. This work thus provides new understandings on simultaneous regulation of both activity and selectivity by the synergy of single atom cocatalysts and oxygen vacancies.

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Section: Introductionmentioning

confidence: 99%

Synergy of Pd atoms and oxygen vacancies on In2O3 for methane conversion under visible light

et al. 2022

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“…Different from the electrochemical and thermal reactions, PEC or PC processes are always facing many technical limitations on their investigations due to the light‐required complex reaction. Even though PEC or PC processes have some complexity, some researchers have applied these techniques to PEC and PC processes and the results provide significant information of the reaction 132–134 . Thus, in the near future, state‐of‐the‐art investigation techniques will be well applied to PEC and PC processes so that artificial photosynthesis will be further developed.…”

Section: Conclusion and Outlooksmentioning

confidence: 99%

“…Even though PEC or PC processes have some complexity, some researchers have applied these techniques to PEC and PC processes and the results provide significant information of the reaction. [132][133][134] Thus, in the near future, state-of-the-art investigation techniques will be well applied to PEC and PC processes so that artificial photosynthesis will be further developed.…”

Section: Conclusion and Outlooksmentioning

confidence: 99%

Artificial photosynthesis for high‐value‐added chemicals: Old material, new opportunity

Kim

et al. 2021

Carbon Energy

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Solar energy utilization has drawn attention due to ever‐increasing environmental and energy issues. Photoelectrochemical (PEC) and photocatalytic (PC) water splitting for hydrogen production, which is the most popular and well‐established solar‐to‐chemical conversion process, has been studied thoroughly to date but is now facing limitations related to low conversion efficiency. To resolve this issue, research in PEC cells or photocatalysts has recently aimed to produce alternative value‐added chemicals by modifying their redox reactions, which potentially enables high economic reward to compensate for the low efficiency. Here, various kinds of redox reactions that decouple classic water splitting reactions to produce value‐added chemicals via PEC and PC processes are introduced. Successful coupling of CO2 reduction, O2 reduction and organic synthesis with either water oxidation or water reduction is comprehensively discussed from the perspective of basic fundamental and product selectivity in terms of the band structure of materials, cocatalyst design, and thermodynamics and kinetics of the reactions. Throughout the review, future challenges and opportunities are suggested with respect to the redesigned artificial synthesis, which might be an alternative development for the commercialization of PEC or PC value‐added chemical production technologies in the near future.

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“…Titanium dioxide (TiO 2 ) is the most frequently investigated semiconductor material for photocatalytic H 2 production. Hejazi et al [17] described an atomic-scale defect engineering method to form and control traps for Pt single atom (SA) sites upon thin sputtered TiO 2 layers for photocatalytic H 2 production. The density of defect centers can be precisely regulated, resulting in the controlled density of Pt SA sites on TiO 2 .…”

Section: Photocatalytic H 2 Productionmentioning

confidence: 99%

Recent advances in photocatalytic renewable energy production

Chen¹,

Zhao²,

Li³

et al. 2022

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The development of green and renewable energy is becoming increasingly more important in reducing environmental pollution and controlling CO 2 discharge. Photocatalysis can be utilized to directly convert solar energy into chemical energy to achieve both the conversion and storage of solar energy. On this basis, photocatalysis is considered to be a prospective technology to resolve the current issues of energy supply and environmental pollution. Recently, several significant achievements in semiconductor-based photocatalytic renewable energy production have been reported. This review presents the recent advances in photocatalytic renewable energy production over the last three years by summarizing the typical and significant semiconductorbased and semiconductor-like photocatalysts for H 2 production, CO 2 conversion and H 2 O 2 production. These reactions demonstrate how the basic principles of photocatalysis can be exploited for renewable energy production. Finally, we conclude our review of photocatalytic renewable energy production and provide an outlook for future related research.

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Disordered-Layer-Mediated Reverse Metal–Oxide Interactions for Enhanced Photocatalytic Water Splitting

Cited by 24 publications

References 45 publications

Synergy of Pd atoms and oxygen vacancies on In2O3 for methane conversion under visible light

Synergy of Pd atoms and oxygen vacancies on In2O3 for methane conversion under visible light

Artificial photosynthesis for high‐value‐added chemicals: Old material, new opportunity

Recent advances in photocatalytic renewable energy production

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