4.8 Article

Metal-Free Photocatalytic CO2 Reduction to CH4 and H2O2 under Non-sacrificial Ambient Conditions

Related references

Note: Only part of the references are listed.
Article Chemistry, Multidisciplinary

Highly Selective Photoelectroreduction of Carbon Dioxide to Ethanol over Graphene/Silicon Carbide Composites

Guanghui Feng et al.

Summary: Using sunlight and a graphene/SiC catalyst, we achieved a high selectivity of>99% for ethanol production from CO2 through artificial photosynthesis. The CO2 conversion rate reached up to 17.1 mmol g(cat)(-1) h(-1) with sustained performance. Experimental and theoretical investigations revealed that the optimal interfacial layer between SiC substrate and graphene overlayer facilitated efficient electron transfer and CO2 to C2H5OH conversion.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023)

Article Chemistry, Multidisciplinary

Metal-free reduction of CO2 to formate using a photochemical organohydride-catalyst recycling strategy

Weibin Xie et al.

Summary: Increasing levels of CO2 in the atmosphere is a pressing issue that needs to be addressed urgently to mitigate global temperature rise. A catalyst system that chemically reduces CO2 into useful compounds and meets certain criteria is necessary for global scale CO2RR. We propose a transition-metal-free catalyst system using an organohydride catalyst based on benzimidazoline for CO2RR, which can be regenerated using a carbazole photosensitizer and visible light, with promising results.

NATURE CHEMISTRY (2023)

Article Chemistry, Physical

Photocatalytic CO2 Reduction Based on a Re(I)-Integrated Conjugated Microporous Polymer: Role of a Sacrificial Electron Donor in Product Selectivity and Efficiency

Faruk Ahamed Rahimi et al.

Summary: One of the major challenges in photocatalytic CO2 reduction is achieving control over the selective formation of a single product while maintaining a high conversion efficiency. In this study, a conjugated microporous polymer (TEB-BPY) was synthesized and characterized, and it was found that Re@TEB-BPY exhibited high photocatalytic activity for CO2 reduction to CO or CH4. The presence of triethylamine (TEA) or 1-benzyl-1,4-dihydronicotinamide (BNAH) as sacrificial electron donors influenced the selectivity of the products.

ACS CATALYSIS (2023)

Article Chemistry, Multidisciplinary

Thiophene-Containing Covalent Organic Frameworks for Overall Photocatalytic H2O2 Synthesis in Water and Seawater

Jie-Yu Yue et al.

Summary: In this study, two novel thiophene-containing covalent organic frameworks (TD-COF and TT-COF) were used as catalysts for photocatalytic H2O2 synthesis via indirect 2e(-) ORR and direct 2e(-) WOR pathways. The N-heterocycle modules in COFs were found to regulate the photocatalytic performance of H2O2 production. The TD-COF exhibited high H2O2 production yields in deionized water and natural seawater without sacrificial agents. Computational mechanism studies revealed the primary photoreduction unit and central photooxidation unit for ORR and WOR, respectively. This work provides new insights into using thiophene-containing COFs for efficient photocatalytic H2O2 synthesis.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023)

Article Multidisciplinary Sciences

Covalent organic frameworks for direct photosynthesis of hydrogen peroxide from water, air and sunlight

Fuyang Liu et al.

Summary: Solar-driven photosynthesis is a sustainable process for hydrogen peroxide production. Optimizing the intramolecular polarity of COFs greatly boosts H2O2 photosynthesis from water, air, and sunlight without sacrificial agents. This process has potential applications in water decontamination using tap, river, or sea water with natural sunlight and air.

NATURE COMMUNICATIONS (2023)

Article Nanoscience & Nanotechnology

Nanoarchitectonics of Metal-Free Porous Polyketone as Photocatalytic Assemblies for Artificial Photosynthesis

Sujan Mondal et al.

Summary: The article introduces a metal-free porous polyketone as a catalyst for CO2 photoreduction to CH4, with high production yield. Charge density changes among donor/acceptor functional groups occur upon photoexcitation. Experimental data shows that H2O binds more strongly to the pyridinic nitrogen group than CO2.

ACS APPLIED MATERIALS & INTERFACES (2022)

Article Chemistry, Multidisciplinary

Molecularly Engineered Covalent Organic Frameworks for Hydrogen Peroxide Photosynthesis

Mingpu Kou et al.

Summary: Synthesizing H2O2 through photocatalytic approach using a bipyridine-based covalent organic framework (COF-TfpBpy) shows high efficiency in small-scale production. The resulting H2O2 solution can degrade pollutants, and the photocatalytic activity is enhanced by the protonation of the bipyridine monomer. This work demonstrates the feasibility of COF-catalyzed photosynthesis of H2O2 from water and air, and provides a foundation for wastewater treatment using photocatalytic H2O2 solution.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Chemistry, Multidisciplinary

Confining and Highly Dispersing Single Polyoxometalate Clusters in Covalent Organic Frameworks by Covalent Linkages for CO2 Photoreduction

Meng Lu et al.

Summary: This study presents a versatile strategy for achieving a uniform dispersion of polyoxometalates (POMs) in covalent organic frameworks (COFs). The resulting COF-POM composites exhibit outstanding catalytic activity in artificial photosynthesis.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Chemistry, Multidisciplinary

Polarization Engineering of Covalent Triazine Frameworks for Highly Efficient Photosynthesis of Hydrogen Peroxide from Molecular Oxygen and Water

Chongbei Wu et al.

Summary: In this study, a polarization engineering strategy was used to enhance the two-electron oxygen photoreduction to hydrogen peroxide by grafting (thio)urea functional groups onto covalent triazine frameworks. The functionalized framework showed significantly improved charge separation/transport and proton transfer, leading to a substantially higher production rate of hydrogen peroxide compared to the unfunctionalized framework. This approach provides a new direction for the development of efficient metal-free polymer-based photocatalysts.

ADVANCED MATERIALS (2022)

Article Multidisciplinary Sciences

Spontaneous exciton dissociation in organic photocatalyst under ambient conditions for highly efficient synthesis of hydrogen peroxide

Huijie Yan et al.

Summary: Researchers have achieved photosynthesis of hydrogen peroxide in real ambient conditions using a conjugated polymeric photocatalyst, with remarkably high efficiency. This efficient photosynthesis allows for solar-to-chemical conversion in a cost-effective and sustainable way, representing an important step towards real applications.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2022)

Article Multidisciplinary Sciences

Bromo- and iodo-bridged building units in metal-organic frameworks for enhanced carrier transport and CO2 photoreduction by water vapor

Xinfeng Chen et al.

Summary: Metal-organic frameworks containing lead halide secondary building units exhibit stability and excellent carrier transport for photocatalytic CO2 reduction.

NATURE COMMUNICATIONS (2022)

Article Chemistry, Multidisciplinary

Facet-specific Active Surface Regulation of BixMOy (M=Mo, V, W) Nanosheets for Boosted Photocatalytic CO2 reduction

Yanzhao Zhang et al.

Summary: In this study, a facile sonication-assisted chemical reduction method was reported to optimize the photocatalytic performance of Bi-based photocatalysts via specific facets regulation through oxygen deprivation. The modified Bi2MoO6 nanosheets exhibited higher CO and CH4 production compared to the pristine catalyst, along with excellent stability and reproducibility.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Chemistry, Multidisciplinary

Engineering Single-Atom Active Sites on Covalent Organic Frameworks for Boosting CO2 Photoreduction

Lei Ran et al.

Summary: This study presents a novel method to enhance the catalytic performance of CO2 reduction by anchoring different metal single-atom sites on a triazine-based covalent organic framework. The synthesized catalyst shows superior CO generation rate and selectivity, achieving efficient CO2 conversion under visible light irradiation.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Chemistry, Multidisciplinary

Selective photocatalytic CO2 reduction to CH4 over metal-free porous polyimide in the solid-gas mode

Subhash Chandra Shit et al.

Summary: A new porous polyimide photocatalyst PeTt-POP was developed using a catalyst-free approach, which can convert CO2 to CH4 under visible light irradiation without the use of additional co-catalysts or sacrificial agents. The progress of the reaction and the related intermediate species were identified through operando DRIFTS experiments, and a plausible reaction mechanism was proposed.

CHEMICAL COMMUNICATIONS (2022)

Article Chemistry, Multidisciplinary

Photocatalytic C-C Coupling from Carbon Dioxide Reduction on Copper Oxide with Mixed-Valence Copper(I)/Copper(II)

Wei Wang et al.

Summary: This study successfully synthesized a CuOX@p-ZnO photocatalyst using Cu-doped ZIF-8, which achieved the reduction of CO2 to C2H4 with a selectivity of 32.9% and an evolution rate of 22.3 μmol/g·h, highlighting the crucial role of surface Cu+ sites in the C-C coupling reaction.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Multidisciplinary

Isolated Cobalt Centers on W18O49 Nanowires Perform as a Reaction Switch for Efficient CO2 Photoreduction

Huabin Zhang et al.

Summary: By successfully decorating isolated cobalt atoms onto the surface of ultrathin W18O49 nanowires, the charge carrier separation and electron transport in the catalytic system are greatly accelerated. The modification of the energy configuration of the W18O49@Co hybrid by surface decoration with cobalt atoms also enhances the redox capability of photoexcited electrons for CO2 reduction. The decorated cobalt atoms serve as the real active sites and act as a reaction switch to facilitate the reaction process.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Multidisciplinary Sciences

Modulating electron density of vacancy site by single Au atom for effective CO2 photoreduction

Yuehan Cao et al.

Summary: The surface electron density significantly affects the photocatalytic efficiency, which can be manipulated by regulating the direction of electron transfer through CdS vacancy types and controlling the size of Au nanostructures. This manipulation leads to effective CO2 photoreduction by increasing the availability of electrons for the reduction process.

NATURE COMMUNICATIONS (2021)

Review Chemistry, Multidisciplinary

Free Charge Carriers in Homo-Sorted p-Stacks of Donor-Acceptor Conjugates

Meera Madhu et al.

Summary: This review discusses the recent advancements in hierarchical organization of molecular building blocks for improved photoconversion in organic solar cells. The self-sorted donor-on-donor/acceptor-on-acceptor arrangements have shown enhanced charge separation efficiency through ultrafast excited state dynamics. The controlled interface and electronic coupling between covalently linked donors and acceptors provide better charge carrier generation efficiency and offer new possibilities for functional supramolecular architectures.

CHEMICAL REVIEWS (2021)

Article Chemistry, Multidisciplinary

Metal-Free Catalysis: A Redox-Active Donor-Acceptor Conjugated Microporous Polymer for Selective Visible-Light-Driven CO2 Reduction to CH4

Soumitra Barman et al.

Summary: This study achieved a two-electron photochemical CO2 reduction process using a metal-free system with the redox-active conjugated microporous polymer TPA-PQ, showing impressive efficiency and selectivity. Mechanistic analysis demonstrated the role of photoactivated ICT in driving the photoreduction of CO2 to CH4 by TPA-PQ. Compared to other similar redox-active CMPs, TPA-PQ exhibited higher catalytic activity towards CO2 photoreduction.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Multidisciplinary Sciences

A solar-to-chemical conversion efficiency up to 0.26% achieved in ambient conditions

Yu-Xin Ye et al.

Summary: By mimicking the NADP-mediated photosynthetic processes in green plants, the current study has achieved progress in improving charge carrier separation efficiency and oxygen reduction efficiency, realizing efficient conversion of water and oxygen into hydrogen peroxide. The solar-to-chemical conversion efficiency in this artificial photosynthesis is significantly higher than that in nature, providing a strategy for efficient solar-to-chemical conversion in the future.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2021)

Review Nanoscience & Nanotechnology

Polymer photocatalysts for solar-to-chemical energy conversion

Tanmay Banerjee et al.

Summary: Organic polymeric photocatalysts offer a promising solution for sustainable energy resources with their precise molecular backbone and broad design space. By analyzing the photophysical and physico-chemical concepts, design principles and future research directions in the emerging field of 'soft photocatalysis' can be derived. The review discusses the fundamental concepts governing the photocatalytic performance of organic polymer photocatalysts and explores the challenges and potential future developments in the field.

NATURE REVIEWS MATERIALS (2021)

Article Multidisciplinary Sciences

Intermolecular cascaded π-conjugation channels for electron delivery powering CO2 photoreduction

Shengyao Wang et al.

NATURE COMMUNICATIONS (2020)

Review Multidisciplinary Sciences

Fundamentals and applications of photocatalytic CO2 methanation

Ulrich Ulmer et al.

NATURE COMMUNICATIONS (2019)

Article Multidisciplinary Sciences

The technological and economic prospects for CO2 utilization and removal

Cameron Hepburn et al.

NATURE (2019)

Article Multidisciplinary Sciences

Size-dependent activity and selectivity of carbon dioxide photocatalytic reduction over platinum nanoparticles

Chunyang Dong et al.

NATURE COMMUNICATIONS (2018)

Article Nanoscience & Nanotechnology

Effect of Redox Non-Innocent Linker on the Catalytic Activity of Copper-Catecholate-Decorated Metal-Organic Frameworks

Xuan Zhang et al.

ACS APPLIED MATERIALS & INTERFACES (2018)

Article Chemistry, Multidisciplinary

Isolation of Cu Atoms in Pd Lattice: Forming Highly Selective Sites for Photocatalytic Conversion of CO2 to CH4

Ran Long et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2017)

Review Chemistry, Multidisciplinary

CO2 Reduction: From the Electrochemical to Photochemical Approach

Jinghua Wu et al.

ADVANCED SCIENCE (2017)

Article Chemistry, Physical

Grain boundary engineered metal nanowire cocatalysts for enhanced photocatalytic reduction of carbon dioxide

Yuzhen Zhu et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2017)

Review Chemistry, Multidisciplinary

Monolithic cells for solar fuels

Jan Ronge et al.

CHEMICAL SOCIETY REVIEWS (2014)

Review Chemistry, Physical

Photochemical and Photoelectrochemical Reduction of CO2

Bhupendra Kumar et al.

ANNUAL REVIEW OF PHYSICAL CHEMISTRY, VOL 63 (2012)

Review Optics

Artificial photosynthesis for solar water-splitting

Yasuhiro Tachibana et al.

NATURE PHOTONICS (2012)

Review Chemistry, Multidisciplinary

Toward Solar Fuels: Photocatalytic Conversion of Carbon Dioxide to Hydrocarbons

Somnath C. Roy et al.

ACS NANO (2010)