Photoelectrochemical and Photocatalytic Hydrogen Generation: A Virtual Issue

Kamat, Prashant V.; Sivula, Kevin

doi:10.1021/acsenergylett.2c02492

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…The negative slope of Mott− Schottky plots (C 2− vs applied potential) of both Ag−TiO 2 JPs and pristine TiO 2 NCs indicated the p-type nature of both materials. The valence band minimum (VBM) relative to the Fermi level of these materials can be calculated by the formula given below formula (1).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The evolution of sustainable technologies for renewable energy has become a crucial component in addressing the emerging energy crisis with the depletion of fossil fuels and an exorbitant increase in fuel costs. The production of hydrogen gas (H 2 ) from the splitting of water (H 2 O) through the photoelectrochemical (PEC) process is one such clean and sustainable energy technology that has the potential to address the upcoming energy challenges. − To achieve an effective photocatalytic water-splitting system, an efficient photocatalyst is inevitable. In view of this, metal oxide nanostructures have been studied extensively owing to their wide band gap, durability, abundance, and environmentally benign nature and their broad applicability in photocatalysis, photovoltaics, electrochromic devices, etc. − One such nanoparticle (NP), TiO 2 NPs (band gap ∼3 eV), exists in different phases and has garnered much attraction due to its applications in water splitting, photovoltaics, antibacterial activities, fuel cell electrochemistry, and photocatalysis. − The photocatalytic activity of TiO 2 is attributed to photoexcitation-driven electron–hole pair formation by high-energy photons relative to its band gap.…”

Section: Introductionmentioning

confidence: 99%

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Amplifying Photoelectrocatalytic D₂O Splitting with Ag–TiO₂ Janus Particles: Interfacial Effects Unveiled

Pathak,

Dey,

Kumar

et al. 2024

J. Phys. Chem. C

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Deuterium (D 2 ), one of the stable isotopes of hydrogen, has immense applications in deuterium labeling, fusion reactors, neutron generation, optical fiber, and the biomedical industry. However, D 2 production employing conventional methods is highly energy intensive and makes it inevitable to explore simple and energy-efficient methods for the production of D 2 . Therefore, the splitting of heavy water or deuterium oxide (D 2 O) to produce deuterium gas (D 2 ) is a good option yet a very challenging process, unlike the splitting of water (H 2 O) into hydrogen gas (H 2 ). In this context, this article demonstrates the 100% photoelectrocatalytic conversion of D 2 O to D 2 instigated by newly synthesized Ag−TiO 2 Janus particles (JPs). In this approach, Ag−TiO 2 JPs were produced via a singlestep emulsion-based technique and utilized as a photocatalyst for electrolytic D 2 production. Furthermore, the electronic band structure at the interface of Ag and TiO 2 , in addition to the mechanism for the splitting of D 2 O to D 2 , has also been demonstrated.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Amplifying Photoelectrocatalytic D₂O Splitting with Ag–TiO₂ Janus Particles: Interfacial Effects Unveiled

Pathak,

Dey,

Kumar

et al. 2024

J. Phys. Chem. C

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“…In artificial photosystems based on photoelectrocatalytic (PEC) cells, production of solar fuels generally requires coupling of the separated electrical charges with multielectron catalysts for the half reactions of interest. [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ] Although PEC technique presents high potential in practical solar fuel production, photoelectrode materials for redox catalysis usually exhibit low efficiencies due to limitations in generating high density photoelectrons for catalyst activation. [ 10 , 11 ] Typical molecular photoelectrodes use single‐molecular complexes as photosensitizers that are supported on inorganic semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Charge Photoaccumulation in Covalent Polymer Networks for Boosting Photocatalytic Nitrate Reduction to Ammonia

He,

Wen,

Fang

et al. 2024

Advanced Science

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In the design of photoelectrocatalytic cells, a key element is effective photogeneration of electron‐hole pairs to drive redox activation of catalysts. Despite recent progress in photoelectrocatalysis, experimental realization of a high‐performance photocathode for multi‐electron reduction of chemicals, such as nitrate reduction to ammonia, has remained a challenge due to difficulty in obtaining efficient electrode configurations for extraction of high‐throughput electrons from absorbed photons. This work describes a new design for catalytic photoelectrodes using chromophore assembly‐functionalized covalent networks for boosting eight‐electron reduction of nitrate to ammonia. Upon sunlight irradiation, the photoelectrode stores a mass of reducing equivalents at the photoexcited chromophore assembly for multielectron reduction of a copper catalyst, enabling efficient nitrate reduction to ammonia. By introducing the new photoelectrode structure, it is demonstrated that the electronic interplay between charge photo‐accumulating assembly and multi‐electron redox catalysts can be optimized to achieve proper balance between electron transfer dynamics and thermodynamic output of photoelectrocatalytic systems.

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Photoelectrochemical Technology for Solar Fuel: Green Hydrogen, Carbon Dioxide Capture, and Ammonia Production

Minggu,

Adris,

Yunus

et al. 2024

Chem Eng & Technol

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Photoelectrochemical (PEC) technology is a promising strategy that can directly convert sunlight into chemical energy. Direct solar water splitting through the PEC process is a desirable method for green hydrogen (H2) production. This technology has also the potential to capture CO2 and convert it into fuels using sunlight and water, besides converting N2 and H2O to produce ammonia (NH3), which acts as transportable H2 storage. The cracking of NH3 to produce H2 can also be accomplished using PEC technology. Despite improved PEC performance having been shown, stability, efficiency, and scalability issues still need to be resolved. Even so, PEC technology has much potential as a clean and sustainable solution for addressing global energy and environmental challenges.

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Photoelectrochemical and Photocatalytic Hydrogen Generation: A Virtual Issue

Cited by 9 publications

References 25 publications

Amplifying Photoelectrocatalytic D₂O Splitting with Ag–TiO₂ Janus Particles: Interfacial Effects Unveiled

Amplifying Photoelectrocatalytic D₂O Splitting with Ag–TiO₂ Janus Particles: Interfacial Effects Unveiled

Charge Photoaccumulation in Covalent Polymer Networks for Boosting Photocatalytic Nitrate Reduction to Ammonia

Photoelectrochemical Technology for Solar Fuel: Green Hydrogen, Carbon Dioxide Capture, and Ammonia Production

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Photoelectrochemical and Photocatalytic Hydrogen Generation: A Virtual Issue

Cited by 9 publications

References 25 publications

Amplifying Photoelectrocatalytic D2O Splitting with Ag–TiO2 Janus Particles: Interfacial Effects Unveiled

Amplifying Photoelectrocatalytic D2O Splitting with Ag–TiO2 Janus Particles: Interfacial Effects Unveiled

Charge Photoaccumulation in Covalent Polymer Networks for Boosting Photocatalytic Nitrate Reduction to Ammonia

Photoelectrochemical Technology for Solar Fuel: Green Hydrogen, Carbon Dioxide Capture, and Ammonia Production

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Amplifying Photoelectrocatalytic D₂O Splitting with Ag–TiO₂ Janus Particles: Interfacial Effects Unveiled

Amplifying Photoelectrocatalytic D₂O Splitting with Ag–TiO₂ Janus Particles: Interfacial Effects Unveiled