Experimental and Theoretical Studies of Active Sites in Catalysts

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

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 13349

Special Issue Editors


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Guest Editor
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Interests: computational chemistry and reaction engineering

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Guest Editor
Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan
Interests: Electrocatalysis and Membrane Electrode Reaction Systems

Special Issue Information

Dear Colleagues,

Tremendous progress has been achieved for developing and improving catalysis technology in the past century. However, in the past, the development of new catalysts largely relied on trial-and-error experiments, which is a tedious and costly approach. One of the major challenges that limit intelligent catalyst design was the difficulty in identifying the active sites and unraveling their roles in reaction mechanisms. However, recent advances in experimental and computational techniques have made it possible to better characterize active sites and determine their functionality in reaction pathways.  This progress has opened the door toward a more detailed understanding of catalytic chemistry, and hence allows for the intelligent design of novel catalysts. This Special Issue will focus on the latest research on the synthesis and characterization of active sites, as well as the investigation of the effects of active sites in catalytic reactions. All experimental and computational studies falling within the scope are welcome for submission.  

Dr. Yi-Pei Li
Dr. Yung-Tin (Frank) Pan
Guest Editors

Manuscript Submission Information

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Keywords

  • Catalyst characterization
  • Structure–activity relationship
  • Reaction mechanism
  • Density functional theory
  • Catalyst development
  • Catalyst deactivation

Published Papers (2 papers)

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Review

13 pages, 1018 KiB  
Review
Understanding the Catalytic Activity of Microporous and Mesoporous Zeolites in Cracking by Experiments and Simulations
by Shih-Cheng Li, Yen-Chun Lin and Yi-Pei Li
Catalysts 2021, 11(9), 1114; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11091114 - 16 Sep 2021
Cited by 8 | Viewed by 4039
Abstract
Porous zeolite catalysts have been widely used in the industry for the conversion of fuel-range molecules for decades. They have the advantages of higher surface area, better hydrothermal stability, and superior shape selectivity, which make them ideal catalysts for hydrocarbon cracking in the [...] Read more.
Porous zeolite catalysts have been widely used in the industry for the conversion of fuel-range molecules for decades. They have the advantages of higher surface area, better hydrothermal stability, and superior shape selectivity, which make them ideal catalysts for hydrocarbon cracking in the petrochemical industry. However, the catalytic activity and selectivity of zeolites for hydrocarbon cracking are significantly affected by the zeolite topology and composition. The aim of this review is to survey recent investigations on hydrocarbon cracking and secondary reactions in micro- and mesoporous zeolites, with the emphasis on the studies of the effects of different porous environments and active site structures on alkane adsorption and activation at the molecular level. The pros and cons of different computational methods used for zeolite simulations are also discussed in this review. Full article
(This article belongs to the Special Issue Experimental and Theoretical Studies of Active Sites in Catalysts)
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15 pages, 3582 KiB  
Review
A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic Activity
by Anant Preet and Tzu-En Lin
Catalysts 2021, 11(5), 594; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11050594 - 04 May 2021
Cited by 32 | Viewed by 8594
Abstract
Scanning electrochemical microscopy (SECM) is a powerful scanning probe technique for measuring the in situ electrochemical reactions occurring at various sample interfaces, such as the liquid-liquid, solid-liquid, and liquid-gas. The tip/probe of SECM is usually an ultramicroelectrode (UME) or a nanoelectrode that can [...] Read more.
Scanning electrochemical microscopy (SECM) is a powerful scanning probe technique for measuring the in situ electrochemical reactions occurring at various sample interfaces, such as the liquid-liquid, solid-liquid, and liquid-gas. The tip/probe of SECM is usually an ultramicroelectrode (UME) or a nanoelectrode that can move towards or over the sample of interest controlled by a precise motor positioning system. Remarkably, electrocatalysts play a crucial role in addressing the surge in global energy consumption by providing sustainable alternative energy sources. Therefore, the precise measurement of catalytic reactions offers profound insights for designing novel catalysts as well as for enhancing their performance. SECM proves to be an excellent tool for characterization and screening catalysts as the probe can rapidly scan along one direction over the sample array containing a large number of different compositions. These features make SECM more appealing than other conventional methodologies for assessing bulk solutions. SECM can be employed for investigating numerous catalytic reactions including the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), water oxidation, glucose oxidation reaction (GOR), and CO2 reduction reaction (CO2RR) with high spatial resolution. Moreover, for improving the catalyst design, several SECM modes can be applied based on the catalytic reactions under evaluation. This review aims to present a brief overview of the recent applications of electrocatalysts and their kinetics as well as catalytic sites in electrochemical reactions, such as oxygen reduction, water oxidation, and methanol oxidation. Full article
(This article belongs to the Special Issue Experimental and Theoretical Studies of Active Sites in Catalysts)
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