Article
Thermodynamics
Shiang-Wuu Perng, Horng-Wen Wu
Summary: This article examines the fuel conversion ability of a small methanol steam reformer and the net electric power of a proton exchange membrane fuel cell. By creating vein channels with varying widths and angles, the hydrogen yield, methanol conversion, and cell net electric power are evaluated at different temperatures. The findings show that adjusting the vein channel width and angle can enhance the fuel conversion and net electric power of the fuel cell.
Article
Chemistry, Physical
Caroline Teixeira Rodrigues, Gabriela de Franca Lopes, Christian Goncalves Alonso, Luiz Mario de Matos Jorge, Paulo Roberto Paraiso
Summary: Studies on the integration of reforming systems with Fuel Cells are intriguing for energy production in remote areas. The development of multi-fuel processors that can utilize various fuels without modifying the unit is particularly interesting. This study modeled and simulated an Autonomous Fuel Cell (AFC) system with methanol and/or Dimethyl Ether Steam Reforming (SR) using Aspen Plus. The evaluation focused on process variables, operational conditions, and the need for additional processes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Konstantinos Kappis, Joan Papavasiliou, Marcin Kusmierz, Grzegorz Slowikc, Yifan Li, Haibin Li, Wojciech Gac, George Avgouropoulos
Summary: Steam reforming of methanol using CuZnOx catalysts was investigated, and the incorporation of Ga was found to improve catalyst performance by altering the environment and promoting the formation of ZnGa2O4 spinels and oxygen vacancies. The presence of Ga2O3 (15 wt%) was beneficial for activity and selectivity, and the formation of a CuZnGaAlOx system further enhanced the performance. The most active material showed promising results in an integrated internal reforming methanol fuel cell operating at 220 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Konstantinos Kappis, Joan Papavasiliou, George Avgouropoulos
Summary: The production of hydrogen through methanol reforming processes, especially steam reforming, has attracted significant interest due to its ability to produce high concentrations of hydrogen with minimal carbon monoxide. Different catalytic systems, preparation methods, and integration with high temperature-polymer electrolyte membrane fuel cells are being actively studied in this field.
Article
Energy & Fuels
Dimitrij Jesic, Vivian Erklavec Zajec, David Bajec, Gregor Dolanc, Gorazd Bercic, Blaz Likozar
Summary: This study proposes a method for obtaining hydrogen from diesel energy for use in fuel cells, using catalytic auto-thermal reforming and water-gas shift technology. Through simulation and analysis, the design of the reactors and the influence factors were studied, and a successful construction and operation model was established.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Green & Sustainable Science & Technology
Na Li, Xiaoti Cui, Jimin Zhu, Mengfan Zhou, Vincenzo Liso, Giovanni Cinti, Simon Lennart Sahlin, Samuel Simon Araya
Summary: This paper provides a comprehensive review of the current status, advantages, and limitations of integrated high temperature proton exchange membrane fuel cell (HT-PEMFC) and methanol steam reformer (MSR) systems, as well as outlining key areas for future improvement. It discusses novel reformer designs, optimization strategies, and different system configurations. Control strategies, system diagnosis, and recommendations for improvements are also addressed. The paper emphasizes the need for improved system startup, compact structural design, reformer heat transfer and pressure drop optimizations, as well as research on membrane materials and catalyst materials for efficient operation and heat integration.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Thermodynamics
Hongsheng Wang, Rufan Yang, Bingzheng Wang, Zenghao Wei, Hui Kong, Xiaofei Lu, Jian Jin
Summary: In this study, a thermodynamic analysis of solar-driven methanol steam reforming reaction in a Pd-Ag membrane reactor was conducted. The results showed that, under optimized reaction conditions, the conversion rate of methanol reached high levels and purified hydrogen and carbon dioxide could be collected separately. Due to the use of solar energy and the membrane reactor, it is predicted that significant coal and carbon dioxide savings can be achieved.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Jiaqi Geng, Qunwei Guo, Jiawen Pan, Bo Chi, Jian Pu
Summary: Steam reforming of diesel over Ru/gamma-Al2O3 and Ni/gamma-Al2O3 catalysts achieved 100% conversion rate and high hydrogen selectivity at temperatures above 600 degrees C. However, the Ni/gamma-Al2O3 catalyst showed poor carbon tolerance and carbon deposition was detected after 10 hours of testing. Adding methanol to the steam-diesel mixture as a stabilizer extended the long-term life from 120 hours to 600 hours at 750 degrees C. The reformed diesel gas (RDG) was successfully used as a fuel in a solid oxide fuel cell (SOFC), demonstrating its adaptability for SOFC applications.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Tianqing Zheng, Wei Zhou, Xuyang Chu, Yunsong Lian
Summary: This study proposes a method of designing a trapezoidal cavity in an auto-thermal methanol steam reforming micro-reactor (ATMSRM) to enhance its reforming temperature performance and hydrogen production. The numerical simulation model of ATMSRM is used to investigate the influence of different geometric sizes of the trapezoidal cavity. The results show that using a specific size of trapezoidal cavity can improve the reforming temperature performance and hydrogen production performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yifan Li, Konstantinos Kappis, Joan Papavasiliou, Zhiyong Fu, Li Chen, Haibin Li, Dimitrios E. Vlachos, George Avgouropoulos
Summary: In this study, a fuel cell based on a molten proton conductor electrolyte membrane was developed, which can operate efficiently at high temperatures through integration with a CuZn-based methanol reformer. The experiment showed that the fuel cell could provide a voltage of 0.7 V and maintain a high open circuit voltage at 220℃.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Nataliya A. Ivanova, Dmitry D. Spasov, Sergey A. Grigoriev, Roman A. Kamyshinsky, Georgy S. Peters, Ruslan M. Mensharapov, Ekaterina A. Seregina, Pierre Millet, Vladimir N. Fateev
Summary: The study found that freeze-thaw cycles from ambient down to -80 degrees C have an impact on the properties of PFSA membranes and the performance of MEAs. The addition of methanol vapor to the hydrogen showed beneficial effects, increasing the ionic resistivity of the membranes but having a protective effect on the catalytic layers. Optimal methanol addition reduced the degradation rate of the catalytic layer by almost half.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Yizi Zhu, Zhixia He, Yanzhi Zhang, Tiemin Xuan, Qian Wang, Zhuang Shao, Weimin Li
Summary: The study investigates the potential of using a tri-fuel combustion mode, combining hydrogen, methanol, and diesel, to improve performance and reduce emissions in compression ignition engines. Through the integration of low-temperature combustion technology and online hydrogen production through methanol steam reforming, efficient and clean combustion is achieved. The optimization results demonstrate that the tri-fuel combustion mode surpasses the methanol/diesel and reformed gas/diesel dual-fuel modes in terms of thermal efficiency and emissions reduction, while also increasing methanol energy substitution rate.
Article
Chemistry, Physical
Peijian Yan, Jiahao Yan, Xinhai Yu, Pengfei Tian, Shenghu Zhou, Shan -Tung Tu
Summary: In this study, a PdZn@ZnO catalyst was synthesized using thermal treatment and H2 reduction to enhance the anti-oxidation and anti-sintering abilities of proton exchange membrane fuel cells (PEMFCs) powered vehicles using on-board H2 production by methanol steam reforming (SRM). The PdZn@ZnO catalyst showed excellent anti-oxidation ability and stability, indicating great potential for on-board hydrogen production in PEMFC-powered vehicles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Jie Luo, Sayan Kar, Michael Rauch, Michael Montag, Yehoshoa Ben-David, David Milstein
Summary: This study presents an efficient, base-free aqueous-phase reforming of methanol catalyzed by a ruthenium pincer complex, with the catalytic activity unexpectedly improved by the addition of a thiol additive. The reactivity of the system is enhanced by nearly 2 orders of magnitude, maintaining activity for over 3 weeks and achieving a total H-2 turnover number of over 130,000. The proposed mechanism involves outersphere dehydrogenations promoted by a unique ruthenium complex with thiolate as an assisting ligand.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Nammin Lee, Masoomeh Ghasemi, Bonghyun Kim, Seungbeen Choe, Kisung Lim, Seung Woo Lee, Seung Soon Jang, Hyunchul Ju
Summary: Air-cooled fuel cell systems are recognized as suitable technology for drone and aviation applications due to their lightweight and simple design. However, compared to liquid-cooled systems, they suffer from low specific power and unstable performance, mainly due to severe electrolyte dehydration and nonuniform current density and temperature profiles.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Engineering, Environmental
Nikolaos Samartzis, Michail Athanasiou, Vassileios Dracopoulos, Spyros N. Yannopoulos, Theophilos Ioannides
Summary: This study reports the laser-mediated synthesis of high-quality graphene powder from a phenol-based resin, with promising potential in energy storage applications. The graphene-like structures showed excellent conductivity and cycling stability in aqueous supercapacitors, demonstrating good rate performance and capacitance values.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
A. Ioannidi, C. Anastasopoulos, D. Vroulias, J. Kallitsis, T. Ioannides, V Deimede
Summary: New pyridinium-based ionic liquids with PEO pendants were synthesized for CO2 and water selective membranes, demonstrating different gas permeability and selectivity based on the anion nature. The PIL containing C(CN)3- anion showed the lowest CO2 permeability with high selectivity, while PIL containing MeSO4- anion exhibited the highest water vapor permeability and selectivity. Water vapor had a plasticizing effect on gas permeation, decreasing separation factors compared to dry conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Maria Smyrnioti, Theophilos Ioannides
Summary: This study investigates the performance of WO3/Al2O3 catalysts in the hydrolysis of dimethyl ether (DME) and finds that tungsten surface density plays a crucial role in the reaction rate and catalytic activity.
Article
Chemistry, Physical
Maria Smyrnioti, Theophilos Ioannides
Summary: The study investigates the catalytic oxidation of dimethyl ether (DME) using copper ferrite catalysts synthesized via the citrate complexation method. The Fe0.67Cu0.33 catalyst showed the highest catalytic activity in DME oxidation due to its higher specific surface area and enhanced redox properties. The presence of highly dispersed copper species and the formation of spinel phase contributed to the enhanced catalytic performance.
Article
Chemistry, Multidisciplinary
Konstantinos S. Andrikopoulos, Giannis Bounos, Georgia Ch Lainioti, Theophilos Ioannides, Joannis K. Kallitsis, George A. Voyiatzis
Summary: In this study, a simple hydrothermal pathway is proposed for the synthesis of nanostructured Mg(OH)(2) using commercial minerals hydromagnesite and huntite. The resulting nano-materials exhibit particles with a diameter of around 200 nm and a thickness of around 10 nm. The molecular structure analysis confirms the nano-sized characteristics of the produced materials. These materials show potential as flame retardant fillers with enhanced transparency, as demonstrated by their thermal and optical properties. The flame retardancy of composite coatings containing the nano-sized Mg(OH)(2) was evaluated using the limiting oxygen index (LOI).
Article
Biochemistry & Molecular Biology
Yifan Li, Jing Hu, Joan Papavasiliou, Zhiyong Fu, Li Chen, Haibin Li
Summary: The performance of membrane-electrode assembly (MEA) can be significantly enhanced by adding phosphoric acid in the catalyst layer with KH5 (PO4) (2)-doped PBI membrane. The influence of humidity and temperature on the resistance and the single-cell performance of MEA has been investigated, showing that temperature elevation can improve the peak power density.
Review
Engineering, Environmental
Michail Athanasiou, Spyros N. Yannopoulos, Theophilos Ioannides
Summary: Research on biomass derived graphene-like carbon materials for novel energy storage applications has significantly increased in recent years. The synthesis of graphene-like structures from biomass offers a cost-effective and almost carbon neutral approach to a more sustainable energy future. These materials are ideal candidates for carbon-based supercapacitor devices, as they demonstrate excellent performance at high-power and short-term energy demands.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Kapil Bhorkar, Nikolaos Samartzis, Michail Athanasiou, Labrini Sygellou, Nikos Boukos, Vassilios Dracopoulos, Theophilos Ioannides, Spyros N. Yannopoulos
Summary: This study demonstrates a simple and scalable process to prepare high-purity turbostratic graphene and graphene/SiOx nanohybrids using laser-mediated explosive synthesis and transfer of graphene flakes. The process is capable of producing graphene flakes on various substrates and shows potential applications in flexible electronics.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Article
Chemistry, Physical
Nikolaos Samartzis, Kapil Bhorkar, Michail Athanasiou, Labrini Sygellou, Vassileios Dracopoulos, Theophilos Ioannides, Spyros N. Yannopoulos
Summary: In this study, a laser-assisted method was developed to synthesize three-dimensional graphene-like porous networks, which offers a single-step, binder-free approach and shows improved performance compared to traditional synthesis protocols. The graphene-based electrodes prepared using this method exhibited excellent performance in terms of energy density, resistance, and cycling stability.
Article
Electrochemistry
P. I. Giotakos, S. G. Neophytides
Summary: Analytical simulation of experimental data of a high-temperature PEMFC revealed that dissociative adsorption of O2(g) is the main limiting step responsible for high ORR overpotentials, and both EIS and polarization resistance are dominated by the intrinsic ORR kinetic inertia.
ELECTROCHIMICA ACTA
(2023)
Article
Biochemistry & Molecular Biology
Dionysios Vroulias, Eirini Staurianou, Theophilos Ioannides, Valadoula Deimede
Summary: This study prepared free-standing composite membranes by blending imidazolium-based ionic liquids (ILs) with a previously developed PEO-based copolymer, aiming to improve CO2 permeability and CO2/gas separation. The effect of IL loading, alkyl chain length, and anion nature on physicochemical and gas transport properties were investigated. The PEO-based copolymer with 40 wt% IL3-[HMIM][TFSI] exhibited the highest CO2 permeability and CO2/H2 and CO2/CH4 selectivities. The membrane also showed high water vapor permeability and H2O/CO2 ideal selectivity, suggesting potential applications in hydrogen purification and CO2 gas stream dehydration.
Article
Engineering, Environmental
Konstantinos Kappis, Joan Papavasiliou, Marcin Kusmierz, Grzegorz Slowikc, Yifan Li, Haibin Li, Wojciech Gac, George Avgouropoulos
Summary: Steam reforming of methanol using CuZnOx catalysts was investigated, and the incorporation of Ga was found to improve catalyst performance by altering the environment and promoting the formation of ZnGa2O4 spinels and oxygen vacancies. The presence of Ga2O3 (15 wt%) was beneficial for activity and selectivity, and the formation of a CuZnGaAlOx system further enhanced the performance. The most active material showed promising results in an integrated internal reforming methanol fuel cell operating at 220 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
D. Vroulias, V. Dracopoulos, T. Ioannides
Summary: Supported nicotine-based IL membranes were synthesized to investigate the effect of alkyl chain length and ether groups on physicochemical properties and gas/water vapor separation. Gas permeation was influenced by diffusion, while solubility played a major role in water vapor permeation. Increasing alkyl chain length enhanced gas permeabilities via reduced IL viscosity, but decreased water vapor permeability due to increased hydrophobicity. In contrast, membranes with IL containing ether groups showed the highest water vapor permeability and selectivity, making them suitable for dehumidification processes even under mixed gas/water vapor conditions.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Nikolaos Samartzis, Michail Athanasiou, Grigorios Raptopoulos, Patrina Paraskevopoulou, Theophilos Ioannides
Summary: Porous carbons obtained from biomass pyrolysis are an excellent choice for energy storage applications due to their abundant precursors, low cost, and the advantages of carbon aerogels such as high specific surface area, good conductivity, and light weight. Establishing cost-effective and eco-friendly protocols is significant to enhance the competitiveness of these materials. In this study, nitrogen/metal co-doped alginate-derived carbon aerogels were thoroughly characterized and showed excellent energy/power density and cycling stability in aqueous supercapacitors, surpassing previous reports.
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
