Contemporary advances in photocatalytic CO2 reduction using single-atom catalysts supported on carbon-based materials

Haider, Syed Najeeb-Uz-Zaman; Qureshi, Waqar Ahmad; Ali, Rai Nauman; Shaosheng, Rao; Naveed, Ahmad; Ali, Amjad; Yaseen, Maria; Liu, Qinqin; Yang, Juan

doi:10.1016/j.cis.2023.103068

Cited by 7 publications

(2 citation statements)

References 226 publications

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“…7,8 The performance of SACs is strongly influenced by the interaction between the single atom and the supporting materials. 9 Owing to the high surface free energy, single metal atoms dispersed on inert substrates tend to undergo diffusion and agglomeration. Considerable research has been dedicated to exploring the potential of emerging twodimensional (2D) materials as substrates for SACs.…”

Section: Introductionmentioning

confidence: 99%

“…The investigation on the synthesis, structure, and property of single-atom catalysts (SACs) has undergone explosive development in the past decade. − The reduction of metal/alloy particles to the size of single atoms introduces advanced features, such as an increased surface free energy, the quantum size effect of single atoms, unsaturated coordination environments, and modulated interactions between a single atom and charge carrier. These unique characteristics significantly contribute to the outstanding catalytic activity and greatly enhance atomic utilization. , The performance of SACs is strongly influenced by the interaction between the single atom and the supporting materials . Owing to the high surface free energy, single metal atoms dispersed on inert substrates tend to undergo diffusion and agglomeration.…”

Section: Introductionmentioning

confidence: 99%

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A New Model of Carbon Nitride as a Substrate to Support Single Metal Atom

Pan,

Deng,

Chen

et al. 2024

J. Phys. Chem. C

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Carbon nitrides are commonly employed as substrates to anchor single metal atoms. Numerous theoretical studies have previously characterized these single-atom systems using the pristine g-C 3 N 4 structure, featuring a C 6 N 7 motif. However, the relatively large pores in g-C 3 N 4 may not effectively coordinate with metal cations, resulting in discordance with the coordination environment determined by experimental characterization. In this study, we introduce a novel model denoted as CN-N 4 , which preserves the essential g-C 3 N 4 motif, while offering four nitrogen sites for metal binding. Compared with g-C 3 N 4 , the binding affinity between the metal and this new substrate model is significantly enhanced, similar to that of a commonly studied nitrogen-doped graphene model (N-gra). Additionally, we have assessed the catalytic performance in various reactions, including the hydrogen evolution reaction (HER), carbon dioxide reduction reaction (CO 2 RR), and oxygen reduction reaction (ORR). The CN-N 4 -supported system exhibits activity comparable to that of the corresponding N-gra-supported species. Fe-and Co-centered SACs can be promising catalysts for ORR, and relatively stable Cu-g-C 3 N 4 is active to HER and CO 2 RR, consistent with reported experiments. In addition, V-CN-N 4 and Rh-CN-N 4 are predicted to be candidates to catalyze the HER and ORR, respectively. We suggest that the CN-N 4 model aptly captures the local structure of carbon nitride-based materials with a high coordination number, providing an alternative foundation for investigating the reaction mechanisms of these single-atom catalysts.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A New Model of Carbon Nitride as a Substrate to Support Single Metal Atom

Pan,

Deng,

Chen

et al. 2024

J. Phys. Chem. C

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Recent Advances in Carbon Nitride Supported Single‐Atom Catalysts: Synthesis, Characterization, and Applications for CO₂ Photoreduction

Hu,

Lei,

Zhang

et al. 2024

ChemCatChem

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Photoreduction of CO2 into value‐added chemicals and fuels is a promising green technology for solar‐to‐chemical conversion. Owing to the atom utilization, unique metal‐support interaction, and unsaturated coordination active sites, single‐atom catalysts (SACs) have been attracting great attention in achieving high activity and selectivity of CO2 photoreduction reactions. On the other hand, carbon nitride (C3N4) with abundant periodically unsaturated coordination of nitrogen atoms can serve as an excellent support for anchoring metal single atoms. In this context, extensive research efforts have been paid in C3N4‐based SACs for CO2 photoreduction in recent years. In this review, we report the recent advances in C3N4 supported SACs for CO2 photoreduction. We start from the introduction of synthetic strategies of various C3N4 supported metal SACs. Secondly, the main advanced characterization techniques and calculation methods for identifying the single‐atoms and their coordination environments of C3N4‐based SACs are summarized. Thirdly, some state‐of‐the‐art works on the rational design of C3N4‐based SACs and their applications in CO2 photoreduction are introduced. Lastly, we briefly summarize the main challenges and propose important perspectives of C3N4‐based SACs in CO2 photoreduction. This review is expected to provide some useful guidelines for the development of efficient and stable C3N4‐based SACs for CO2 photoreduction.

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Recent Progress on the Surface and Bulk Modification of Carbon Nitrides for Photocatalytic Carbon Dioxide Reduction

Ma,

Wang,

Wang

et al. 2024

Energy Tech

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Photocatalytic CO2 reduction has been considered as a green and sustainable approach to solve energy and environmental problems. However, the CO2 reduction efficiency of various types of semiconductor photocatalysts studied at this stage is far from realizing practical applications. The challenge of photocatalytic CO2 reduction is to design photocatalysts with excellent catalytic performance. This article summarizes the carbon nitride materials for efficient CO2 reduction and obtaining high value‐added products. The physicochemical properties of carbon nitride materials are discussed in terms of the photocatalytic mechanisms (bandgap tuning, high specific surface area, shorter electron–hole transmission paths, increasing the number of active sites, etc.). The present review provides the latest research progress of carbon nitride modification strategies. The prospects and challenges for the application of carbon nitride materials for CO2 reduction are presented. This review article will provide useful guidance for further research on carbon nitride materials for efficient photocatalytic CO2 reduction.

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Contemporary advances in photocatalytic CO2 reduction using single-atom catalysts supported on carbon-based materials

Cited by 7 publications

References 226 publications

A New Model of Carbon Nitride as a Substrate to Support Single Metal Atom

A New Model of Carbon Nitride as a Substrate to Support Single Metal Atom

Recent Advances in Carbon Nitride Supported Single‐Atom Catalysts: Synthesis, Characterization, and Applications for CO₂ Photoreduction

Recent Progress on the Surface and Bulk Modification of Carbon Nitrides for Photocatalytic Carbon Dioxide Reduction

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Contemporary advances in photocatalytic CO2 reduction using single-atom catalysts supported on carbon-based materials

Cited by 7 publications

References 226 publications

A New Model of Carbon Nitride as a Substrate to Support Single Metal Atom

A New Model of Carbon Nitride as a Substrate to Support Single Metal Atom

Recent Advances in Carbon Nitride Supported Single‐Atom Catalysts: Synthesis, Characterization, and Applications for CO2 Photoreduction

Recent Progress on the Surface and Bulk Modification of Carbon Nitrides for Photocatalytic Carbon Dioxide Reduction

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Product

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Recent Advances in Carbon Nitride Supported Single‐Atom Catalysts: Synthesis, Characterization, and Applications for CO₂ Photoreduction