Catalysts

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Special Issue Information

Dear Colleagues,

Rapid human development has been accompanied by serious challenges in environmental protectionn. This has brought a sustainable new energy revolution to address the increasingly serious global climate change. The catalytic technique constitutes one of the key routes to solving such issues as those faced in the environment protection and energy revolution fields. The present Issue aims to majorly focus on the recent developments in advanced catalytic materials designs. Environmental protection includes, but is not limited to the following areas:

(1) CO₂ neutralization (CO₂ hydrogenation, drying reforming);

(2) gas and diesel hydrodesulfurization (HDS);

(3) NO_x selective catalytic reduction (NH₃-SCR, et al.);

(4) VOCs combustion, adsorption, and resource reusing;

(5) water electrolysis (hydrogen evolution reaction, HER; oxygen evolution reaction OER) & fuel cells.

If you would like to submit papers to this Special Issue or have any questions, please contact the editor, Mr. Ives Liu ([email protected]).

Dr. Ning Liu
Prof. Dr. Ning Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

CO₂ reduction
NH₃-SCR
VOCs combustion
HER
HDS
OER
fuel cells

Published Papers (2 papers)

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Research

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19 pages, 2447 KiB

Open AccessArticle

Promotion Effect of H₂S at High Concentrations on Catalytic Dry Reforming of Methane in Sour Natural Gas

by Hengchang Ni, Xiaoyu Jia, Li Yu, Yuyang Li and Ping Li

Catalysts 2024, 14(6), 352; https://doi.org/10.3390/catal14060352 - 29 May 2024

Viewed by 148

Abstract

The effect of high concentrations of H₂S in sour natural gas on the catalytic dry reforming of methane (DRM) process has seldom been studied previously in the literature. Herein, several types of catalysts, including MgO, NiO/MgO, and LaNiO₃ in different states, were prepared for conducting DRM at 800 °C and 0.1 MPa in a feed of 20 vol% CO₂ and 20 vol% CH₄, and their catalytic performance under conditions of the absence and presence of H₂S was compared. A promotion effect of increasing H₂S concentration on both the conversions of CO₂ and CH₄ and the molar yields of CO and H₂ was observed on all the catalysts and was particularly remarkable on the MgO and the pristine NiO/MgO. For NiO/MgO, the addition of 15 vol% H₂S increased the conversion of CH₄ from 6.92% to 26.86% and CO₂ from 9.15% to 42.10%. While there was a significant decline in the catalytic activity of the reduced NiO/MgO and LaNiO₃ catalysts after adding H₂S, moderate reactant conversions were still sustained. The results of process analysis and catalyst structure characterization suggest that H₂S participation can contribute to the increment in CO₂ and CH₄ conversion, and active S-adsorbed species may play the key role of catalysis in reactions involving H₂S. Full article

(This article belongs to the Special Issue Recent Advances in Environment and Energy Catalysis)

Review

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21 pages, 6492 KiB

Open AccessFeature PaperReview

Recent Modification Strategies of MoS₂ towards Electrocatalytic Hydrogen Evolution

by Lei Liu, Ning Liu, Biaohua Chen, Chengna Dai and Ning Wang

Catalysts 2024, 14(2), 126; https://doi.org/10.3390/catal14020126 - 5 Feb 2024

Viewed by 1350

Abstract

Hydrogen production by the electrolysis of water is a green and efficient method, which is of great significance for achieving sustainable development. Molybdenum disulfide (MoS₂) is a promising electrocatalyst for hydrogen evolution reaction (HER) due to its high electrochemical activity, low cost, and abundant reserves. In comparison to the noble metal Pt, MoS₂ has poorer hydrogen evolution performance in water electrolysis. Therefore, further modifications of MoS₂ need to be developed aiming at improving its catalytic performance. The present work summarizes the modification strategies that have been developed in the past three years on hydrogen evolution from water electrolysis by utilizing MoS₂ as the electrocatalyst and following the two aspects of internal and external modifications. The former includes the strategies of interlayer spacing, sulfur vacancy, phase transition, and element doping, while the latter includes the heterostructure and conductive substrate. If the current gap in this paper’s focus on modification strategies for electrocatalytic hydrogen evolution in water electrolysis is addressed, MoS₂ will perform best in acidic or alkaline media. In addition to that, the present work also discusses the challenges and future development directions of MoS₂ catalysts. Full article

(This article belongs to the Special Issue Recent Advances in Environment and Energy Catalysis)

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