Catalysis on Stable Molecules (CO2, CO, CH4, N2, NH3) Activation and Their Transformation, 3rd Edition

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Environmental Catalysis".

Deadline for manuscript submissions: closed (31 January 2025) | Viewed by 705

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Guest Editor
1. Department of Chemical Engineering, Ajou University, Suwon 16499, Republic of Korea
2. Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
Interests: catalysis; green chemistry; C1 chemistry; hydrogen production; biomass conversion; sustainable chemical processes
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Special Issue Information

Dear Colleagues,

This issue is a continuation of the previous successful Special Issues “Catalysis on Stable Molecules (CO2, CO, CH4, N2, NH3) Activation and Their Transformation” and “Catalysis on Stable Molecules (CO2, CO, CH4, N2, NH3) Activation and Their Transformation, 2nd Edition”.

C1 gases, including CO, CO2, and CH4, can serve as starting materials for the synthesis of value-added chemicals via several catalytic pathways. In particular, CO2 and CH4 are greenhouse gases, and their conversion to valuable chemicals is of great importance. However, due to the stable chemical nature of these compounds, there is an urgent need for catalytic research on their efficient chemical conversion. In addition, N2 is also a very stable compound and has received much attention within green ammonia synthesis through reaction with green hydrogen. Hydrogen production through catalytic decomposition of NH3 is also expected to contribute significantly to realization of the hydrogen economy. In addition, various chemical reactions involving NH3 are also important for fine chemicals. In this Special Issue of Catalysis, we present recent advances in the activation and catalytic conversion of these stable molecules. The scope of this Special Issue of Catalysis covers all aspects of catalytic research on these stable molecules, from theoretical calculations to catalyst screening for homogeneous and/or heterogeneous catalysts. It also includes not only traditional thermal catalysis, but also electrochemical catalysis, photocatalysis, and photoelectrochemical catalysis.

Prof. Dr. Eun Duck Park
Guest Editor

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Keywords

  • CO2 activation
  • CO2 conversion
  • CO2 hydrogenation
  • dry reforming of methane
  • methane activation
  • methane conversion
  • amination
  • ammonia decomposition
  • N2 activation
  • ammonia synthesis
  • carbonylation
  • hydroformylation
  • CO hydrogenation

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13 pages, 3406 KiB  
Article
Coral Reef-like CdS/g-C3N5 Heterojunction with Enhanced CO2 Adsorption for Efficient Photocatalytic CO2 Reduction
by Fuhai Zhang, Jing Xiong, Xiaoxiao Yu, Lei Wang, Tongyu Wu, Zhendong Yu, Minmeng Tang, Haiyan Liu, Yanhong Chao and Wenshuai Zhu
Catalysts 2025, 15(1), 94; https://doi.org/10.3390/catal15010094 - 20 Jan 2025
Viewed by 471
Abstract
As a promising member of the carbon nitride family, nitrogen-rich g-C3N5 has attracted significant attention because of its excellent light absorption performance. Nevertheless, its practical application in photocatalytic CO2 reduction is hindered by severe photogenerated charge recombination and limited [...] Read more.
As a promising member of the carbon nitride family, nitrogen-rich g-C3N5 has attracted significant attention because of its excellent light absorption performance. Nevertheless, its practical application in photocatalytic CO2 reduction is hindered by severe photogenerated charge recombination and limited CO2 adsorption capacity. Constructing a heterojunction has emerged as an effective strategy to mitigate charge recombination, thereby enhancing the photocatalytic performance of the catalyst. Herein, a series of CdS/g-C3N5-X heterojunction catalysts were prepared via an in situ hydrothermal approach. The obtained heterojunction catalysts exhibited a novel coral reef-like morphology which facilitated the exposure of additional active sites, thereby enhancing the adsorption and activation of CO2. Moreover, studies have shown that CdS can be anchored to the surface of g-C3N5 through C-S bonds, forming a built-in electric field at the interface, which accelerated the separation and transfer of photogenerated charges. Consequently, the resulting heterojunction materials demonstrated high efficiency in photocatalytic CO2 reduction with H2O as a sacrificial agent. In particular, CdS/g-C3N5-0.2 exhibited the maximum photocatalytic performance up to 22.9 μmol·g−1·h−1, which was 6 times and 3 times that of unmodified g-C3N5 and CdS, respectively. The results indicated that the increased active sites and enhanced charge separation of the Cd/g-C3N5-0.2 catalyst were the primary reasons for its improved photocatalytic CO2 reduction performance. This work provides a novel heterojunction-based photocatalyst for efficient CO2 photocatalytic reduction, offering insights into the preparation of high-performance photocatalysts for sustainable energy applications. Full article
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