Article
Chemistry, Applied
M. T. Izquierdo, F. Garcia-Labiano, A. Abad, A. Cabello, P. Gayan, L. F. de Diego, J. Adanez
Summary: This study evaluated the stability of a CuO/Al2O3 impregnated oxygen carrier during methane chemical looping combustion at high oxygen carrier to fuel ratios. The research found that low oxygen carrier conversion variation reduced copper loss from particles, but reoxidizing the oxygen carrier at high temperatures was difficult due to the formation of CuAlO2. Operating at temperatures around 800 degrees C with low solid conversion variation is recommended to limit copper loss while maintaining physical stability.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Lei Liu, Zhenshan Li, Zuoan Li, Yngve Larring, Ningsheng Cai
Summary: This study investigates the effect of SO2 on the redox kinetics of a CaMn0.375Ti0.5Fe0.125O3-delta perovskite oxygen carrier, revealing that SO2 has minimal impact on reduction reactivity at high temperatures but decreases oxidation reactivity. The sulfur mainly exists in the form of sulfates/sulfides on the particle surface, leading to sulfur poisoning effect during oxidation and reduction processes.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Energy & Fuels
Guicai Liu, Grzegorz Lisak
Summary: This review summarizes the basic properties and opportunities of Cu-based OCs in various chemical looping processes. It covers the applications of Cu-based OCs in chemical looping combustion (CLC), chemical looping oxygen uncoupling (CLOU), chemical looping air separation (CLAS), chemical looping for syngas/H2 production, integrated CaO/CuO looping process, and thermochemical energy storage (TCES). The review also discusses the technical challenges and current strategies related to agglomeration, attrition, and ash accumulation. It provides insights and guidance for the design and development of Cu-based OCs and their applications in chemical looping processes.
Article
Energy & Fuels
Giovanny S. de Oliveira, Ciro E. S. Lobo, Carlos E. A. Padilha, Domingos F. S. Souza, Juan A. C. Ruiz
Summary: Brazil aims to reduce its CO2 emissions by utilizing glycerin in Chemical Looping Combustion (CLC). The study evaluates the feasibility of using glycerin in CLC and finds that the addition of ethanol improves combustion efficiency, while the addition of methanol reduces efficiency.
Article
Engineering, Environmental
A. Cabello, A. Abad, T. Mendiara, M. T. Izquierdo, L. F. de Diego
Summary: Chemical looping combustion (CLC) allows for the simultaneous combustion of a fuel and the capture of CO2. In this study, tests were conducted in a lab-scale CLC unit using a promising Cu-based oxygen carrier to determine its combustion performance and durability. Operating conditions were carefully selected to maximize the oxygen carrier's durability while achieving complete CH4 combustion. The results showed that the Cu-based oxygen carrier exhibited excellent mechanical resistance, making it suitable for continuous CLC operation at 900 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Dawei Wang, Anuj Joshi, Liang-Shih Fan
Summary: Chemical looping is a process that uses chemical intermediates to decompose a reaction into multiple sub-reaction steps. Calcium looping and redox looping are two applications of chemical looping, with the former being commercially demonstrated and the latter yet to be realized sustainably. With increasing concerns about climate change, efforts to develop redox looping as a promising fossil energy conversion technology with CO2 emission control have been invigorated. Metal oxide reaction engineering and particle science and technology are crucial technical areas to advance the industrial practice of chemical looping.
Article
Chemistry, Applied
Dingshan Cao, Cong Luo, Wenting Xing, Guoqiu Cai, Tong Luo, Fan Wu, Xiaoshan Li, Liqi Zhang
Summary: Coal-direct chemical looping hydrogen generation (CDCLHG) is a novel process that directly produces H-2 from coal and captures CO2. In this study, perovskite oxygen carriers were synthesized and BaMnO3 was found to be the optimal oxygen carrier for CDCLHG, achieving high H-2 gas production with a high H-2 gas production rate. The BaMnO3-delta obtained during the reaction process showed the conversion of lattice oxygen to carbonate oxygen and can recover its initial structure.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yunlei Zhao, Youyou Li, Bo Jin, Zhiwu Liang
Summary: Chemical looping is a powerful process intensification strategy for integrated CO2 capture and utilization. In this study, a bifunctional Ca-Fe-Mg material derived from LDH was synthesized and used in chemical looping reforming process. The results showed that 900°C was the suitable reforming temperature, and the material exhibited high syngas production and stable H2/CO ratio.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
N'dri Arthur Konan, Mary Ann Clarke, Hossain Aziz, Mehrdad Shahnam
Summary: This study numerically examines the oxygen production through air separation using the redox cycle reactions of Sr1-xCaxFeO3-δ perovskite particles. The results show that the oxygen production can be enhanced by 4% through thermal management at 500 degrees C. Additionally, increasing the operating temperature to 550 degrees C can significantly increase the oxygen production by approximately 30%.
Article
Energy & Fuels
Zhiyu Li, Xiaoshan Dong, Beibei Yan, Jian Li, Jian Wang, Liguo Jiao, Guanyi Chen, Sarwaich Ahmed, Yan Cao
Summary: This study investigates the crucial properties of oxygen carriers (OC) in chemical looping gasification and finds that LaCu0.5Fe0.5O3 exhibits the best gasification performance. The stability of OC is also evaluated through cyclic experiments.
Article
Chemistry, Physical
Jing Wang, Jiande Gu, Asif Rony, Maohong Fan, Jerzy Leszczynski
Summary: The mechanism of CO/CO2 conversion on the surface of calcium ferrite (CFO) in chemical looping was explored using density functional theory, revealing that the Fe center in CFO plays a key role as a catalyst. The study proposed a plausible pathway for the catalytic reaction, with energetically stable spin states of CFO serving as effective catalysts. The presence of a triplet O-2 molecule was found to drive the conversion of these spin-state structures during the reaction pathway.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Engineering, Environmental
Lei Liu, Zhenshan Li, Zuoan Li, Yngve Larring, Ningsheng Cai
Summary: The MFB-TGA method is effective in measuring fast heterogeneous kinetics of oxygen carriers, overcoming limitations observed in TGA. The study investigated oxygen uncoupling and redox reaction kinetics of CaMn0.5Ti0.375Fe0.125O3-delta, revealing oxidation reactions are chemically controlled, while reduction reactions have both fast and slow stages. Analyzing the MFB-TGA data provided kinetic parameters for both oxygen uncoupling and redox reactions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Jiawei Hu, Hilde Poelman, Stavros-Alexandros Theofanidis, Jonas J. Joos, Christophe Detavernier, Dirk Poelman, Wei Wei, Vladimir V. Galvita
Summary: CCLHGD is a new hot gas desulfurization method that utilizes alternating sulfuration and regeneration processes to remove H2S. Fe2O3 is gradually converted into iron sulfides by H2S, and it can be fully regenerated to iron oxides by CO2. This work provides an efficient chemical looping scheme for H2S removal and offers new opportunities for hot gas desulfurization.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Energy & Fuels
Felix Donat, Agnieszka Kierzkowska, Christoph R. Muller
Summary: In chemical looping, using Fe and Co as the main and side reaction metals can effectively reduce the extent of carbon deposition and improve the catalytic effect of oxygen carriers on methane decomposition.
Article
Engineering, Environmental
Lei Liu, Zhenshan Li, Yang Wang, Zuoan Li, Yngve Larring, Ningsheng Cai
Summary: A spray drying granulation protocol was developed to produce an industrial-scale perovskite oxygen carrier. Micro-fluidized bed thermogravimetric experiments were performed to measure the reaction kinetics, and the obtained data was fitted by a semi-empirical kinetic model. The upscaled granulates showed similar physical and chemical properties to the laboratory-scale particles, with high reaction rates, low attrition rates, and low energy consumption.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Applied
Yuan Tian, Phillip R. Westmoreland, Fanxing Li
Summary: The reduction kinetics and stability of Na2MoO4-promoted CaMn0.9Ti0.1O3 were investigated for its application in CL-ODH of ethane, showing promising results with excellent selectivity towards hydrogen combustion. The addition of Na2MoO4 effectively suppressed C2H4 combustion relative to H2 oxidation, making it a potential alternative for ethylene production. The core-shell structure of CaMn0.9Ti0.1O3@Na2MoO4 was well-maintained with deep reduction, demonstrating excellent performance after 50 redox cycles.
Article
Chemistry, Applied
Sherafghan Iftikhar, William Martin, Yunfei Gao, Xinbin Yu, Iwei Wang, Zili Wu, Fanxing Li
Summary: The study investigates LaFe1_xNixO3_delta redox catalysts for CO2 utilization and production of syngas. Different compositions of LaFe1_xNixO3_delta were prepared and tested, showing favorable reactive performance. The flexibility of the catalysts to produce syngas or hydrogen with tunable compositions depends on the iron/nickel ratio. The stability and performance of the redox catalysts were proven over multiple cycles.
Article
Engineering, Environmental
Haiming Gu, Guohui Song, Miaomiao Niu, Shanhui Zhao, Yunfei Gao, Fanxing Li
Summary: In this study, high temperature sorbent SrO was prepared with sol-gel method and the effect of different support materials on the reactivity stability was evaluated. It was found that CeO2 supported sorbent exhibited super stable CO2 capture performance, enabling carbonation/calcination at a lower temperature and improving microstructure and sintering resistance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Leo Brody, Luke Neal, Junchen Liu, Fanxing Li
Summary: The study demonstrates a system for converting ethane to liquid fuels based on a chemical looping oxidative dehydrogenation scheme, which features autothermal operation, high ethane conversion rate, and product selectivity. After long-term stable operation, the system shows good economic viability.
Article
Chemistry, Multidisciplinary
Yuan Tian, Giancarlo Luongo, Felix Donat, Christoph R. Muller, Yngve Larring, Phillip R. Westmoreland, Fanxing Li
Summary: This study investigates the thermodynamic properties of Brownmillerite-structured Ca2MnAlO5+delta, including the measurement of oxygen nonstoichiometry and the establishment of a defect model. The experimental results show that the material has excellent oxygen storage capacity, and the defect model can reasonably predict its performance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Jian Dou, Joey Funderburg, Kunran Yang, Junchen Liu, Dennis Chacko, Kui Zhang, Adam P. Harvey, Vasudev P. Haribal, S. James. Zhou, Fanxing Li
Summary: CO2-assisted oxidative dehydrogenation of propane (CO2-ODH) is a promising method for propylene production and CO2 utilization. This study focuses on designing CexZr1-xO(2)-mixed oxide-supported CrOx catalysts for CO2-ODH with enhanced selectivity and stability. The addition of Ce to the ZrO2 support greatly improves catalyst stability by enhancing coke resistance.
Article
Nanoscience & Nanotechnology
Siyuan Zhu, Yufeng Chen, Vasishta Somayaji, Peter Novello, Dennis Chacko, Fanxing Li, Jie Liu
Summary: High entropy oxide (HEO) is a promising catalyst support for various chemical reactions due to its tunable composition-function properties. In this study, highly dispersed rhodium nanoparticles were successfully synthesized on HEO using a one-step glycine-nitrate-based combustion method. The resulting catalyst exhibited significantly higher selectivity and activity in CO2 hydrogenation compared to rhodium nanoparticle-based catalysts. The high CO selectivity was attributed to the presence of copper and zinc in the HEO support, which weakened the *CO binding strength and formed a strong metal-support interaction.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Runxia Cai, Hilal Bektas, Xijun Wang, Kyle McClintock, Lauren Teague, Kunran Yang, Fanxing Li
Summary: This paper reports a high-throughput combinatorial approach for accelerated development and optimization of perovskite oxides for thermochemical energy storage. Promising candidates are selected based on thermodynamic screening criteria and DFT simulation results. The experimental results confirm the effectiveness of the high-throughput approach in determining key properties of perovskite oxides.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Vahid Rahmanian, Tahira Pirzada, Eduardo Barbieri, Sherafghan Iftikhar, Fanxing Li, Saad A. Khan
Summary: We have developed a robust method for creating polyvinylpyrrolidone (PVP)-titania (TiO2) nanofibrous aerogels (NFA) with multifunctional and triggered performances. These 3D self-supported aerogels have low density and high porosity, and are fabricated through solid templating of sol-gel electrospun PVP-TiO2 hybrid nanofibers. The aerogels exhibit photocatalytic activity, antibacterial properties, ability to sorb volatile organic compounds (VOCs) and oils, as well as excellent thermal insulation and mechanical flexibility.
APPLIED MATERIALS TODAY
(2023)
Article
Energy & Fuels
Leo Brody, Mahe Rukh, Runxia Cai, Azin Saberi Bosari, Reinhard Schomaecker, Fanxing Li
Summary: Sorption-enhanced steam reforming (SESR) of toluene using A- and B-site doped Sr(1-x)A'(x)Fe1-yB'(y)O3-delta perovskites in a chemical looping scheme shows promise in converting aromatic tar byproducts into hydrogen-rich syngas. Impregnating Ni on the perovskite surface improves toluene conversion, and a dual bed configuration enhances cyclic CO2 capture and release for H2-rich product syngas.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Engineering, Environmental
Runxia Cai, Leo Brody, Yuan Tian, Luke Neal, Arnab Bose, Fanxing Li
Summary: Chemical looping oxidative dehydrogenation (CL-ODH) has the potential to replace steam cracking for ethylene production. Accurate reactor modeling is crucial for scaling up and optimizing this new technology. A one-dimensional packed bed model was used to simulate the CL-ODH of ethane to ethylene, and the results were validated by experiments. Overall, this study provides insights for efficient and optimized operation of CL-ODH reactors.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Yuan Tian, Zoe Benedict, Fanxing Li, Yingchao Yang, Debtanu Maiti, Yixiao Wang, Rebecca Fushimi
Summary: In the context of energy and environment, finding energy efficient routes for chemical manufacturing and reducing greenhouse gas emissions is crucial. This study presents a pathway for continuous syngas production through chemical looping conversion of CH4 and CO2. The chemical looping approach mitigates catalyst deactivation and improves energy efficiency. The study explores the structure-function relationships of catalysts and demonstrates the activation of CH4 over Ni-promoted samples. The findings highlight the potential of chemical looping reactors for efficient syngas production from waste greenhouse gases.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Chongyan Ruan, Ryota Akutsu, Kunran Yang, Noha M. Zayan, Jian Dou, Junchen Liu, Arnab Bose, Leo Brody, H. Henry Lamb, Fanxing Li
Summary: A two-step solar thermochemical hydrogenation process for furfural upgrading is developed, which sources hydrogen directly from water and concentrated solar radiation. The catalytic performance achieved in this process is significantly higher than that of state-of-the-art catalytic hydrogenation method, with up to two-orders-of-magnitude-higher hydrogen utilization efficiency. The active sites for furfural adsorption and water dissociation are provided by a metal or reduced metal oxide, eliminating the barriers to hydrogen dissolution and the subsequent dissociation at the catalyst surface. The hydrogenation selectivity can be conveniently mediated by solvents with different polarity and metal/reduced metal oxide catalysts with varying oxophilicity. This work offers an efficient and versatile strategy for bio-oil upgrading and a promising pathway for renewable energy storage.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Xiaojiao Yuan, Kunran Yang, Chloe Grazon, Cong Wang, Lorenzo Vallan, Jean-David Isasa, Pedro M. Resende, Fanxing Li, Cyril Brochon, Hynd Remita, Georges Hadziioannou, Eric Cloutet, Jian Li
Summary: The relationship between the aggregation of 4,7-bis(thiophen-2-yl) benzothiadiazole (TBT)-based conjugated trimers and their photocatalytic activity was systematically investigated by methyl side-chain engineering. TBT-3 with the smallest size of aggregates and highest crystallinity exhibit the highest photocatalytic H2 evolution activity, which is due to the shorter charge carrier transport distance and solid long-range order.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Vahid Rahmanian, Muhammed Ziauddin Ahmad Ebrahim, Seyedamin Razavi, Mai Abdelmigeed, Eduardo Barbieri, Stefano Menegatti, Gregory N. Parsons, Fanxing Li, Tahira Pirzada, Saad A. Khan
Summary: This study presents a novel method for synthesizing metal-organic frameworks (MOFs) on 3D-structured nanofibrous aerogels (NFAs). The resulting hybrid aerogels exhibit promising applications in CO2 adsorption, heavy metal removal, and antibacterial properties.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
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)
