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Recent Advances in Environment and Energy Catalysis
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Recent Advances in Environment and Energy Catalysis

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

Deadline for manuscript submissions: closed (30 September 2024) | Viewed by 11336

Special Issue Editors

Dr. Ning Liu

E-Mail Website
Guest Editor
Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
Interests: CH4 oxidation; zeolite; DFT simulation; multifunction nanomaterial design
Prof. Dr. Ning Wang

E-Mail Website
Guest Editor
Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
Interests: CO2 hydrogenation; C3H8 dehydrogenation; C1 catalysis
Special Issues, Collections and Topics in MDPI journals

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) NOx 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 (ives.liu@mdpi.com).

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 2200 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

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Published Papers (7 papers)

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Research

Jump to: Review

10 pages, 2442 KiB  
Communication
Residual Trifluorosulfonic Acid in Amino-Functionalized Covalent Triazine Frameworks for Boosting Photocatalytic Hydrogen Evolution
by Chengxiao Zhao, Zhaolin Li and Weiping Xiao
Catalysts 2025, 15(1), 12; https://doi.org/10.3390/catal15010012 - 26 Dec 2024
Viewed by 731
Abstract
The utilization of covalent triazine frameworks (CTFs) as photocatalysts has witnessed rapid advancements in the field of photocatalysis. However, the presence of residual components in certain CTFs materials is widely ignored as regards their influence on photocatalytic performance. In this study, we find [...] Read more.
The utilization of covalent triazine frameworks (CTFs) as photocatalysts has witnessed rapid advancements in the field of photocatalysis. However, the presence of residual components in certain CTFs materials is widely ignored as regards their influence on photocatalytic performance. In this study, we find that trifluorosulfonic acid (TfOH) molecules stably exist in the amino-functionalized CTF-NH2 framework, which enhance the affinity for water. The experimental results indicate that the residual TfOH elevates the VB position of CTF-NH2, facilitating the oxidization of both water and sacrificial agents. Moreover, the present of TfOH accelerates the separation and transfer of photogenerated charge carriers to the Pt cocatalyst. Consequently, CTF-NH2-F containing residual TfOH molecules demonstrates a significant enhancement in the photocatalytic hydrogen evolution, achieving about 250 µmol over a duration of 3 h of illumination, which represents a 2.5-fold increase compared to that observed for CTF-NH2. This research underscores the substantial impact that residues exert on photocatalytic performance. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Catalysis)
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12 pages, 4139 KiB  
Article
Fluorine-Doped Graphene Oxide-Modified Graphite Felt Cathode for Hydrogen Peroxide Generation
by Junling Hu, Zhaohui Wang, Yongmei Chen and Wei Xu
Catalysts 2024, 14(11), 793; https://doi.org/10.3390/catal14110793 - 6 Nov 2024
Cited by 1 | Viewed by 1025
Abstract
Electrochemical oxygen reduction via the two-electron pathway (2e-ORR) is an emerging method for producing H2O2. It is cleaner, safer, and more convenient compared to the anthraquinone process. Graphite felt is one of the cathode candidates for large-scale cells due [...] Read more.
Electrochemical oxygen reduction via the two-electron pathway (2e-ORR) is an emerging method for producing H2O2. It is cleaner, safer, and more convenient compared to the anthraquinone process. Graphite felt is one of the cathode candidates for large-scale cells due to its excellent mechanical properties. However, commercial graphite felt often fails to achieve the desired hydrogen-peroxide yield because of its low catalytic selectivity for the 2e-ORR pathway. Fluorine-doped carbon materials are expected to enhance 2e-ORR selectivity. This is because the electronic structure of carbon atoms adjacent to fluorine atoms may facilitate the production of hydrogen peroxide while hindering its further reduction. In this study, fluorine-doped graphene oxide (FGO) was prepared by the hydrothermal method. Subsequently, graphite felt modified with FGO was fabricated and used as the cathode for H2O2 production. The results indicated that in alkaline media, the graphite felt modified with FGO achieved a catalytic selectivity of 93% and a generation rate of 8.91 mg cm⁻2 h⁻¹. In comparison, commercial graphite felt had a catalytic selectivity of 75% and a generation rate of 2.10 mg cm⁻2 h⁻¹. Moreover, graphite felt modified by FGO also exhibited excellent electrocatalytic performance for H2O2 generation in neutral media. This research provides a fundamental study to promote the application of graphite felt in the environmentally friendly electrocatalytic production of hydrogen peroxide in industries. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Catalysis)
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9 pages, 3640 KiB  
Article
Temperature Influence on the Synthesis of Pt/C Catalysts for Polymer Electrolyte Membrane Fuel Cells
by Gayoung Kim, Dong-Hyun Lee, Gyungse Park, Ho-Jung Sun, In-Tae Kim, Sehkyu Park, Hyung-Ryul Rim, Hong-Ki Lee and Joongpyo Shim
Catalysts 2024, 14(9), 577; https://doi.org/10.3390/catal14090577 - 30 Aug 2024
Cited by 1 | Viewed by 1384
Abstract
To reduce the manufacturing cost of polymer electrolyte membrane fuel cells (PEMFCs), tests targeting the decrease of reaction temperature and the amount of reducing agent in the polyol method for the synthesis of Pt/C catalysts were conducted. The reaction temperature in the polyol [...] Read more.
To reduce the manufacturing cost of polymer electrolyte membrane fuel cells (PEMFCs), tests targeting the decrease of reaction temperature and the amount of reducing agent in the polyol method for the synthesis of Pt/C catalysts were conducted. The reaction temperature in the polyol method was changed from 50 to 160 °C. Through XRD and TGA, it was determined that the reduction of platinum ions by the oxidation of ethylene glycol started at 70 °C. Below a 60 °C reaction temperature, Pt (1 1 1) peaks in XRD were barely visible, indicating that no deposition occurred. TEM revealed that Pt particles were well-dispersed above a 100 °C reaction temperature. For manufacturing platinum catalysts using the polyol method, it was found that 100 °C is the optimal synthesis temperature. Additionally, it was found that similar performance can be achieved by adding water to decrease the amount of ethylene glycol during synthesis. Finally, considering various analyses, it is evident that the dispersion, size, and crystallinity of platinum particles had the most significant impact on performance. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Catalysis)
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15 pages, 9817 KiB  
Article
Enhanced Photocatalytic Performances of SnS2/TiO2 Composites via a Charge Separation Following Z-Scheme at the SnS2/TiO2{101} Facets
by Nkenku Carl, Muhammad Fiaz, Hyun-Seok Oh and Yu-Kwon Kim
Catalysts 2024, 14(7), 442; https://doi.org/10.3390/catal14070442 - 10 Jul 2024
Cited by 2 | Viewed by 1847
Abstract
The formation of heterojunctions for efficient charge separation has been practiced for the preparation of efficient semiconductor-based photocatalysts for applications such as hydrogen production and environmental remediation. In this study, we synthesized a composite structure with a heterojunction between SnS2 and TiO [...] Read more.
The formation of heterojunctions for efficient charge separation has been practiced for the preparation of efficient semiconductor-based photocatalysts for applications such as hydrogen production and environmental remediation. In this study, we synthesized a composite structure with a heterojunction between SnS2 and TiO2 through a microwave-assisted hydrothermal process, in which SnS2 nanoparticles grew on nanocrystalline TiO2 nanosheets preferentially at the exposed {101} facets. Appropriate exposure of the {001} and {101} facets of the TiO2 nanosheet in the composite with a preferential growth of SnS2 nanoparticles at the {101} facets was the origin of the charge separation following a direct Z-scheme mechanism to result in enhanced photocatalytic performances in photodegradation of organic dyes such as methylene blue (MB) and rhodamine B (RhB) compared to that of SnS2 and TiO2 alone. A plot of photodegradation rates vs. SnS2 ratios in the composites gave an overall volcano-shaped curve with a maximum at the SnS2 ratio of about 33% at which small SnS2 nanoparticles were populated at the {101} facets of the TiO2 nanosheets with a high surface area (118.2 m2g−1). Our results suggest the microwave-assisted hydrothermal process can be a good synthetic approach for composite-based photocatalysts with a preferential heterojunction structure. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Catalysis)
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19 pages, 3451 KiB  
Article
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
Cited by 1 | Viewed by 1220
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 [...] Read more.
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)
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Review

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17 pages, 4731 KiB  
Review
Low-Temperature NH3-SCR Technology for Industrial Application of Waste Incineration: An Overview of Research Progress
by Qiannan Guo, Minghu Zhao, Hongzhao Fan, Rongshu Zhu, Rigang Zhong and Xianxiang Bai
Catalysts 2024, 14(11), 766; https://doi.org/10.3390/catal14110766 - 30 Oct 2024
Cited by 2 | Viewed by 1312
Abstract
Selective catalytic reduction of nitrogen oxides with NH3 (NH3-SCR) was investigated deeper and deeper with poisoning factors such as H2O, SO2, heavy metals, etc. In order to remove the reheating process before the SCR reactor, the [...] Read more.
Selective catalytic reduction of nitrogen oxides with NH3 (NH3-SCR) was investigated deeper and deeper with poisoning factors such as H2O, SO2, heavy metals, etc. In order to remove the reheating process before the SCR reactor, the application trend of NH3-SCR technology in the non-power industry is concentrated on the condition of low temperature even ultra-low temperature. The present study summarizes the research process of SO2 and H2O resistance of NH3-SCR catalysts under low temperatures related to the working conditions of municipal solid waste incineration plants. In detail, the effects of a high content of H2O and low concentration of SO2 are reviewed. Other factors such as heavy metals, alkali, or alkaline earth metals in the reaction system, synergistic removal of NOx, polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) are addressed. Finally, the catalytic performance of assembled monolithic catalysts and pilot-scale experiments are also analyzed for the possibility of industrial application. Hopefully, in view of the questions outlined in this study, valuable insights could be taken into consideration for the development of NH3-SCR in waste incineration. Full article
(This article belongs to the Special Issue Recent Advances in Environment and Energy Catalysis)
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21 pages, 6492 KiB  
Review
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
Cited by 8 | Viewed by 3019
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 [...] Read more.
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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