Catalysis: Homogeneous and Heterogeneous, 2nd Edition

Topic Information

Dear Colleagues,

Chemistry has a remarkable ability to transform naturally occurring materials into new materials, with new properties and performances that would not otherwise exist. However, only chemical innovations conducted sustainably can allow progress towards achieving the United Nations Sustainable Development Goals. Catalysis (both homogeneous and heterogeneous) is a remarkably important tool to aid towards innovation for sustainable development, enabling reactions to be performed with the highest energy saving, in the most efficient, economical, and environmentally responsible way. This Topic is devoted to the fundamental and applied aspects of catalysis, with the aim of providing a comprehensive perspective on the current status of the research field. It is expected that this will help to provide a bridge between the most fundamental knowledge on homo- and heterogeneous catalytic systems and the development of new applications based on this knowledge.

Prof. Dr. Luísa Margarida Martins
Dr. Isidro M. Pastor
Topic Editors

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Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Catalysts catalysts	3.9	6.3	2011	14.3 Days	CHF 2700	Submit
Chemistry chemistry	2.1	2.5	2019	19.1 Days	CHF 1800	Submit
Materials materials	3.4	5.2	2008	13.9 Days	CHF 2600	Submit
Molbank molbank	0.6	0.7	1997	15.5 Days	CHF 500	Submit
Molecules molecules	4.6	6.7	1996	14.6 Days	CHF 2700	Submit

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Open AccessArticle

Co/SiO₂ Catalyst for Methoxycarbonylation of Acetylene: On Catalytic Performance and Active Species

by An Wang, Hongchen Cao, Leilei Zhang and Aiqin Wang

Molecules 2024, 29(9), 1987; https://doi.org/10.3390/molecules29091987 - 26 Apr 2024

Viewed by 240

Abstract

Reppe carbonylation of acetylene is an atom-economic and non-petroleum approach to synthesize acrylic acid and acrylate esters, which are key intermediates in the textile, leather finishing, and polymer industries. In the present work, a noble metal-free Co@SiO₂ catalyst was prepared and evaluated [...] Read more.

Reppe carbonylation of acetylene is an atom-economic and non-petroleum approach to synthesize acrylic acid and acrylate esters, which are key intermediates in the textile, leather finishing, and polymer industries. In the present work, a noble metal-free Co@SiO₂ catalyst was prepared and evaluated in the methoxycarbonylation reaction of acetylene. It was discovered that pretreatment of the catalyst by different reductants (i.e., C₂H₂, CO, H₂, and syngas) greatly improved the catalytic activity, of which Co/SiO₂-H₂ demonstrated the best performance under conditions of 160 °C, 0.05 MPa C₂H₂, 4 MPa CO, and 1 h, affording a production rate of 4.38 g_MA+MP g_cat⁻¹ h⁻¹ for methyl acrylate (MA) and methyl propionate (MP) and 0.91 g_DMS g_cat⁻¹ h⁻¹ for dimethyl succinate (DMS), respectively. Transmission electron microscopy (TEM), X-ray diffraction (XRD), and diffuse reflectance infrared Fourier transform spectra of CO adsorption (CO-DRIFTS) measurements revealed that an H₂ reduction decreased the size of the Co nanoparticles and promoted the formation of hollow architectures, leading to an increase in the metal surface area and CO adsorption on the catalyst. The hot filtration experiment confirmed that Co₂(CO)₈ was generated in situ during the reaction or at the pre-activation stage, which served as the genuine active species. Our work provides a facile and convenient approach to the in situ synthetization of Co₂(CO)₈ for a Reppe carbonylation reaction. Full article

(This article belongs to the Topic Catalysis: Homogeneous and Heterogeneous, 2nd Edition)

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26 pages, 9040 KiB  

Open AccessReview

Research Progress on Atomically Dispersed Fe-N-C Catalysts for the Oxygen Reduction Reaction

by Yuebin Lian, Jinnan Xu, Wangkai Zhou, Yao Lin and Jirong Bai

Molecules 2024, 29(4), 771; https://doi.org/10.3390/molecules29040771 - 07 Feb 2024

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Abstract

The efficiency and performance of proton exchange membrane fuel cells (PEMFCs) are primarily influenced by ORR electrocatalysts. In recent years, atomically dispersed metal–nitrogen–carbon (M-N-C) catalysts have gained significant attention due to their high active center density, high atomic utilization, and high activity. These [...] Read more.

The efficiency and performance of proton exchange membrane fuel cells (PEMFCs) are primarily influenced by ORR electrocatalysts. In recent years, atomically dispersed metal–nitrogen–carbon (M-N-C) catalysts have gained significant attention due to their high active center density, high atomic utilization, and high activity. These catalysts are now considered the preferred alternative to traditional noble metal electrocatalysts. The unique properties of M-N-C catalysts are anticipated to enhance the energy conversion efficiency and lower the manufacturing cost of the entire system, thereby facilitating the commercialization and widespread application of fuel cell technology. This article initially delves into the origin of performance and degradation mechanisms of Fe-N-C catalysts from both experimental and theoretical perspectives. Building on this foundation, the focus shifts to strategies aimed at enhancing the activity and durability of atomically dispersed Fe-N-C catalysts. These strategies encompass the use of bimetallic atoms, atomic clusters, heteroatoms (B, S, and P), and morphology regulation to optimize catalytic active sites. This article concludes by detailing the current challenges and future prospects of atomically dispersed Fe-N-C catalysts. Full article

(This article belongs to the Topic Catalysis: Homogeneous and Heterogeneous, 2nd Edition)

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