A comprehensive review of the promising clean energy carrier: Hydrogen production, transportation, storage, and utilization (HPTSU) technologies

Fuel, Journal Year: 2023, Volume and Issue: 355, P. 129455 - 129455

Published: Aug. 16, 2023

Language: Английский

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Interfacial Chemical Bond and Oxygen Vacancy‐Enhanced In₂O₃/CdSe‐DETA S‐scheme Heterojunction for Photocatalytic CO₂ Conversion

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(23)

Published: March 2, 2023

Abstract The S‐scheme heterojunctions have great potential for photocatalytic carbon dioxide reduction due to their unique carrier migration pathways, superior separation efficiencies, and high redox capacities. However, the precise process of oriented powerful electron transport remains a challenge. Herein, an InOCd bond‐modulated heterojunction In 2 O 3 /CdSe‐DETA is synthesized by simple microwave‐assisted hydrothermal method accelerated photogenerated transfer. Meanwhile, oxygen vacancies (Vo) capture effect. Consequently, thanks synergistic effect this In‐Vo‐In‐O‐Cd structural units at interface, electrons are extracted rapidly transferred surface‐active sites, which improves electronic coupling CO . This finding precisely adjusts transfer pathway shortens distance. chemical bond established in heterostructure with (Vo‐In ) provides new insights into reduction.

Language: Английский

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A new breakthrough in photocatalytic hydrogen evolution by amorphous and chalcogenide enriched cocatalysts

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 455, P. 140601 - 140601

Published: Nov. 26, 2022

Language: Английский

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Hydrogen-Bond Network Promotes Water Splitting on the TiO₂ Surface

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(30), P. 13565 - 13573

Published: July 19, 2022

Breaking the strong covalent O–H bond of an isolated H2O molecule is difficult, but it can be largely facilitated when connected with others through hydrogen-bonding. How a hydrogen-bond network forms and performs becomes crucial for water splitting in natural photosynthesis artificial photocatalysis awaiting microscopic spectroscopic understanding at molecular level. At prototypical photocatalytic H2O/anatase-TiO2(001)-(1×4) interface, we report promote coupled proton hole transfer splitting. The formation controlled by precisely tuning coverage to above one monolayer. Under ultraviolet (UV) light irradiation, opens cascaded channel photoexcited hole, concomitant release form surface hydroxyl groups. yielded groups provide excess electrons TiO2 surface, causing reduction Ti4+ Ti3+ leading emergence gap states, as monitored situ UV/X-ray photoelectron spectroscopy. density functional theory calculation reveals that exothermic process oxidation assistance network. In addition widely concerned exotic activity from photocatalysts, our study demonstrates internal network, which ubiquitous practical aqueous/catalyst interfaces, also indispensable

Language: Английский

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Isolated Electron Trap‐Induced Charge Accumulation for Efficient Photocatalytic Hydrogen Production

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(25)

Published: April 20, 2023

The solar-driven evolution of hydrogen from water using particulate photocatalysts is considered one the most economical and promising protocols for achieving a stable supply renewable energy. However, efficiency photocatalytic splitting far satisfactory due to sluggish electron-hole pair separation kinetics. Herein, isolated Mo atoms in high oxidation state have been incorporated into lattice Cd0.5 Zn0.5 S (CZS@Mo) nanorods, which exhibit rate 11.32 mmol g-1 h-1 (226.4 μmol ; catalyst dosage 20 mg). Experimental theoretical simulation results imply that highly oxidized species lead mobile-charge imbalances CZS induce directional photogenerated electrons transfer, resulting effectively inhibited recombination greatly enhanced efficiency.

Language: Английский

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Hydrogen energy systems: Technologies, trends, and future prospects

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 939, P. 173622 - 173622

Published: May 29, 2024

This review critically examines hydrogen energy systems, highlighting their capacity to transform the global framework and mitigate climate change. Hydrogen showcases a high density of 120 MJ/kg, providing robust alternative fossil fuels. Adoption at scale could decrease CO

Language: Английский

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Tandem cells for unbiased photoelectrochemical water splitting

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(14), P. 4644 - 4671

Published: Jan. 1, 2023

This review describes the fundamentals of PEC tandem cells and current status optimised photoelectrodes for cells. The challenges perspectives unbiased water splitting are discussed.

Language: Английский

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Photochemistry Journey to Multielectron and Multiproton Chemical Transformation

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(36), P. 16219 - 16231

Published: Sept. 2, 2022

The odyssey of photochemistry is accompanied by the journey to manipulate "electrons" and "protons" in time, space, energy. Over past decades, single-electron (1e-) photochemical transformations have brought marvelous achievements. However, as each photon absorption typically generates only one exciton pair, it exponentially challenging accomplish multielectron proton transformations. multistep differences thermodynamics kinetics urgently require us optimize light harvesting, expedite consecutive electron transfer, interaction catalysts with substrates, coordinate transfer furnish selective bond formations. Tandem catalysis enables orchestrating different events catalytic from subpicoseconds seconds, which facilitates redox chemistries brings consecutive, value-added reactivities. Joint efforts molecular material design, mechanistic understanding, theoretical modeling will bring synthetic opportunities for fuels, fertilizers, chemicals enhanced versatility, efficiency, selectivity, scalability, thus taking better advantage photons (i.e., sunlight) our sustainable society.

Language: Английский

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Ru/Ir‐Based Electrocatalysts for Oxygen Evolution Reaction in Acidic Conditions: From Mechanisms, Optimizations to Challenges

Advanced Science, Journal Year: 2024, Volume and Issue: 11(21)

Published: March 19, 2024

Abstract The generation of green hydrogen by water splitting is identified as a key strategic energy technology, and proton exchange membrane electrolysis (PEMWE) one the desirable technologies for converting renewable sources into hydrogen. However, harsh anode environment PEMWE oxygen evolution reaction (OER) involving four‐electron transfer result in large overpotential, which limits overall efficiency production, thus efficient electrocatalysts are needed to overcome high overpotential slow kinetic process. In recent years, noble metal‐based (e.g., Ru/Ir‐based metal/oxide electrocatalysts) have received much attention due their unique catalytic properties, already become dominant acidic OER process applied commercial devices. these still face thorny problem conflicting performance cost. this review, first, metal briefly classified according forms existence, mechanisms outlined. Then, focus on summarizing improvement strategies with respect activity stability over years. Finally, challenges development prospects discussed.

Language: Английский

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Photocatalytic Overall Water Splitting by SrTiO₃: Progress Report and Design Strategies

ACS Applied Energy Materials, Journal Year: 2023, Volume and Issue: 6(3), P. 1134 - 1154

Published: Jan. 27, 2023

Overall water splitting (OWS) using particulate photocatalysts is a promising and straightforward route for producing sustainable clean hydrogen. Strontium titanate (SrTiO3) well-documented photocatalyst in both one-step two-step (Z-scheme) systems presents state-of-the-art activities. Nevertheless, SrTiO3 still has inherent restraints, such as structural imperfections insufficient optical absorption ability. This critical review summarizes the recent progress photocatalytic overall photocatalyst, primarily focusing on modification techniques that are being used to alleviate its drawbacks. Concretely, we outline cocatalyst loading, crystal-facet engineering, reduction of bulk defects, heteroatom doping, constructing Z-Scheme systems. Following that, efforts developing sheets panel reactors large-scale hydrogen generation discussed. Lastly, current challenges regarding solar by concluded, future scope proposed. The knowledge gained here may also be useful other efficient photocatalysts.

Language: Английский

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