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Shengnan Lan

Bio: Shengnan Lan is an academic researcher from Southeast University. The author has contributed to research in topics: Hydrogen production. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

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TL;DR: MoC/MAPbIglesias as discussed by the authors has shown excellent hydrogen evolution rate performance under visible light by using the non-precious metal promoter MoC to modify MAPbI3, and provides a new idea for the synthesis of efficient MAP bI3-based composite catalysts.
Abstract: Metal halide perovskites, such as iodine methylamine lead (MAPbI3), have received extensive attention in the field of photocatalytic decomposition of HI for hydrogen evolution, due to their excellent photoelectric properties. In this paper, a new MAPbI3-based composite, MoC/MAPbI3, was synthesized. The results show that 15 wt% MoC/MAPbI3 has the best hydrogen production performance (38.4 μmol h−1), which is approximately 24-times that of pure MAPbI3 (1.61 μmol h−1). With the extension of the catalytic time, the hydrogen production rate of MoC/MAPbI3 reached 165.3 μmol h−1 after 16 h due to the effective separation and transfer of charge carriers between MoC and MAPbI3, showing excellent hydrogen evolution rate performance under visible light. In addition, the cycling stability of MoC/MAPbI3 did not decrease in multiple 4 h cycle tests. This study used the non-precious metal promoter MoC to modify MAPbI3, and provides a new idea for the synthesis of efficient MAPbI3-based composite catalysts.

10 citations


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Önder Metin1
TL;DR: In this article , the use of 2D bismuthene as a photocatalyst in a liquid-phase organic transformation was reported for the first time, and a density functional theory (DFT) study revealed mechanistic details that lie behind the catalytic activity.
Abstract: Recently, layered two-dimensional (2D) semiconductor materials composed of group 15 elements (pnictogens) are demonstrated as efficient photocatalysts in various applications. However, only little attention is given to the investigation of their catalytic properties, and even there is no example of the photocatalytic application of bismuthene so far. Here we report for the first time on the use of 2D bismuthene as a photocatalyst in a liquid-phase organic transformation. 2D bismuthene is proven to be an efficient photocatalyst that can be operated under various reaction conditions including indoor light illumination, darkness, outdoors and low temperature for the photoredox C–H arylation of (hetero)arenes with high product yields. The presented bismuthene catalyzed photoredox C–H arylation protocol works efficiently on a broad substrate scope of (hetero)arenes with aryl diazonium salts bearing electron-withdrawing and electron-donating groups. Moreover, a density functional theory (DFT) study reveals mechanistic details that lie behind the catalytic activity of bismuthene.

11 citations

Journal ArticleDOI
TL;DR: In this article, the use of 2D bismuthene as a photocatalyst in a liquid-phase organic transformation was reported for the first time, and a density functional theory (DFT) study revealed mechanistic details that lie behind the catalytic activity.
Abstract: Recently, layered two-dimensional (2D) semiconductor materials composed of group 15 elements (pnictogens) are demonstrated as efficient photocatalysts in various applications. However, only little attention is to the investigation of their catalytic properties, and even there is no example of the photocatalytic application of bismuthene so far. Here we report for the first time on the use of 2D bismuthene as a photocatalyst in a liquid-phase organic transformation. 2D bismuthene is proven to be an efficient photocatalyst that can be operated under various reaction conditions including indoor light illumination, darkness, outdoors and low temperature for the photoredox C–H arylation of (hetero)arenes with high product yields. The presented bismuthene catalyzed photoredox C–H arylation protocol works efficiently on a broad substrate scope of (hetero)arenes with aryl diazonium salts bearing electron-withdrawing and electron-donating groups. Moreover, a density functional theory (DFT) study reveals mechanistic details that lie behind the catalytic activity of bismuthene.

11 citations

Journal ArticleDOI
TL;DR: In this paper , the authors highlight some recent crucial advances in active metal carbide-based cocatalysts for photocatalytic solar-to-fuel conversion and highlight some new options for rationally designing and developing novel and efficient metal carbides-based composites for highly active and selective photovoltaic solar to fuel conversion.
Abstract: Semiconductor‐based photocatalytic solar‐to‐fuel conversion has proven an appealing strategy for achieving carbon‐neutral and green‐hydrogen production. However, almost all semiconductors exhibit unsatisfactory photocatalytic performance due to insufficient surface‐active sites, weak selectivity, and fast charge‐carrier recombination. For these reasons, cocatalyst loading has become an encouraging strategy for improving photocatalytic activity and selectivity. Owing to the scarcity, and cost of noble metal‐based cocatalysts, utilization of low‐cost noble‐metal‐free cocatalysts, such as metal carbide‐based cocatalysts, has aroused tremendous attention. This review highlights some recent crucial advances in active metal carbide‐based cocatalysts for photocatalytic solar‐to‐fuel conversion. First, the fundamentals of metal carbide‐based cocatalysts are presented, including the photocatalytic mechanism, advantages, drawbacks, and design rules. Second, three synthesis approaches of high‐active metal carbide‐based cocatalysts, namely constructing metal carbide nanostructures, epitaxial synthesis of metal carbides on nanostructured carbon, and crystal imperfection construction on metal carbides, are thoroughly addressed. Subsequently, applications of metal carbide‐based cocatalysts in photocatalytic hydrogen production, CO2 reduction, and nitrogen reduction are further discussed. Finally, the crucial challenges and important directions of metal carbide‐based cocatalysts for photocatalytic solar‐to‐fuel conversion are proposed. This review demonstrates some new options for rationally designing and developing novel and efficient metal carbide‐based cocatalysts for highly active and selective photocatalytic solar‐to‐fuel conversion.

5 citations

Journal ArticleDOI
TL;DR: In this paper , a photocatalytic hydrogen evolution (HER) amount for [email protected] was found to be 10.44 mmol g−1, far greater than any other composite catalysts in terms of photocatalysis.

5 citations

Journal ArticleDOI
TL;DR: In this article , Mo2C nanoparticles have been anchored onto methylammonium lead iodide (MAPbI3) as a nonnoble metal cocatalyst to promote H2 evolution reactions.
Abstract: Halide perovskites have been emerging as promising photocatalytic materials for H2 evolution from water due to their outstanding photoelectric properties. However, the lack of proper surface reactive sites greatly hinders the photocatalytic potential of these fascinating compounds. Here, Mo2C nanoparticles have been anchored onto methylammonium lead iodide (MAPbI3) as a nonnoble metal cocatalyst to promote H2 evolution reactions. The Mo2C nanoparticles have opposite zeta potential with MAPbI3 thereby electrostatically assembled onto the MAPbI3 surface, i.e., Mo2C@MAPbI3. Our results show that the anchored Mo2C nanoparticles have a strong interplay with MAPbI3 substrate so that photogenerated electrons of MAPbI3 can be rapidly separated and transferred into Mo2C for further H2 evolution reactions. Under optimal conditions, Mo2C@MAPbI3 delivers exceptionally high photocatalytic performance for visible light-driven H2 evolution that clearly outperforms pristine MAPbI3 and Pt-deposited MAPbI3. An apparent quantum efficiency as high as 12.65% at 600±40 nm has been attained for H2 evolution, surpassing most of the MAPbI3-based photocatalyst reported. These results signify the usefulness and applicability of Mo2C as a new nonnoble metal-based cocatalyst in solar water splitting.

4 citations