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
Chemistry, Physical
Jiawei Hu, Vladimir V. Galvita, Hilde Poelman, Zhigang Wang, Guy B. Marin, Sibudjing Kawi
Summary: By utilizing carbon's reductive power, this study integrates dry reforming of methane and selective reduction of nitric oxide in a chemical looping process, achieving stable CO2 utilization and NO reduction with cyclic catalyst regeneration. The temporal-spatial separation of reactions in chemical looping allows for complete conversion of carbon and NO, ensuring a higher exergetic efficiency. Additionally, adapting the relative duration of the DRM and SRN steps to industrial point sources offers an attractive strategy for selective catalytic reduction of NO with greenhouse gases.
APPLIED CATALYSIS B-ENVIRONMENTAL
(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
Engineering, Environmental
Xueyan Sun, Liangliang Zhu, Wei Zhao, Feng Li, Xi Chen
Summary: In this study, a chemical looping scheme was developed to efficiently reduce impure CO2 containing O-2 impurities into high value-added substances. The synergistic effect of Ni and Fe played a key role in achieving high conversion and yield. This work presents a promising approach for direct utilization of impure CO2 and achieving carbon-neutral economic development.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Mingze Su, Haibo Zhao, Xiaoyu Wang
Summary: This study explores the oxygen uncoupling kinetics of CuO oxygen carrier using a multi-scale methodology. The results show that gas diffusion, especially in the sample layer, plays a significant role in the conversion process of CuO samples. Additionally, the physical structure of CuO particles, specifically the grain size, has an important effect on the oxygen uncoupling rate, with an optimal size of 245 nm.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Richard A. Newby, Dale L. Keairns, Robert W. Stevens
Summary: The objective of this study was to estimate the cost of commercial production of oxygen carriers (OCs) for large-scale application in the chemical looping combustion (CLC) power generation industry. Two production facility scenarios were considered, and two OC production techniques were addressed. The estimated OC product costs can be used to guide development and determine the maximum OC makeup rate for achieving a designated cost-of-electricity (COE) reduction goal.
Article
Thermodynamics
Zhiyuan Zhang, Xutao Wang, Lilin Zhang, Hengtao Zhou, Rui Ju, Peijun Rao, Xiaoyu Guo, Yaqian Han, Hongwei Chen
Summary: A comprehensive study was conducted to evaluate the characteristics of BOFS and EAFS as oxygen carriers for the CLG of SS. BOFS demonstrated higher surface roughness, wear resistance, and oxygen transport capacity compared to EAFS. The parameters showed complex trends with increasing mass ratio. The highest carbon conversion rate and cold gas efficiency were observed when the steam flow rate was 0.15 g/min for both BOFS and EAFS as oxygen carriers. BOFS exhibited faster cyclic reactivity decline but higher combustible component content.
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
Thermodynamics
Guoqiang Wei, Lifang Deng, Haoran Yuan, Xixian Yang, Zhen Huang, Anqing Zheng, Li Xu
Summary: Under the background of fossil fuel consumption and global climate change, an enhanced chemical looping gasification of biomass coupled with CO2 splitting (CLGCS) was proposed using Fe-based mixed oxygen carriers (OCs). The experimental results showed that the NiO modified sample exhibited excellent reaction behavior in CLGCS.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Weidong Sun, Guofeng Zhao, Ya Gao, Jiaqi Si, Ye Liu, Yong Lu
Summary: This study reported an efficient catalyst obtained by decorating an oxygen carrier FeMnO3 with Na2WO4, achieving high CH4 conversion rate and C-2-C-3 selectivity with good cycling performance at 800 degrees Celsius, demonstrating great potential for application in the CL-OCM process.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Energy & Fuels
Ming Luo, Lunzheng Zhou, Cao Kuang, Chao Wang, Haiyan Zhang
Summary: Chemical-looping combustion (CLC) technology is an efficient solution for fuel conversion with CO2 separation, with sulfur being a major consideration in coal utilization. The study investigated the release and fate of pyritic sulfur in the CLC process. SO2 was the dominant sulfurous gas released and metal sulfides were confirmed to be present in the oxygen carriers, affecting the sulfur conversion in both reduction and reoxidation stages.
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
Yunlei Zhao, Bo Jin, Lin Zhang, Wenhao Ji, Zhiwu Liang
Summary: In this study, a series of microstructured iron-based spinel oxygen carriers were synthesized by thermal transformation of Prussian blue analogues using other active metals. The structure, cyclic stability, and CO yield of the oxygen carriers were extensively characterized. It was found that all the spinel oxygen carriers showed special morphologies and good reactivity. NiFe-Zr material exhibited the highest CO2 conversion rate without deactivation, attributed to the catalytic role of Ni and the formation of Fe3O4 during redox cycles. This work provides a new approach for the design of efficient spinel oxygen carriers for chemical looping CO2 conversion.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Arturo Cabello, Alberto Abad, Maria T. Izquierdo, P. Gayan, Luis F. de Diego, Francisco Garcia-Labiano, Juan Adanez
Summary: Chemical looping combustion (CLC) is a cost-effective technology for CO2 capture, and the development of reliable oxygen carrier materials is essential for its scale-up. A low-cost method using thermogravimetric analysis has been developed to accelerate the identification of long-lasting materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xin Tian, Chaohe Zheng, Haibo Zhao
Summary: Ce-modified SrFeO3 oxygen carriers exhibit high activity and selectivity in oxidative dehydrogenation of ethane, attributed to the decreased Fe2+/(Fe3++Fe4+) ratio and increased active oxygen species on the near-surface. DFT calculations demonstrate that Ce promotion leads to a lower energy barrier for surface oxygen vacancy formation in 0.2Ce/SrFeO3. The superior ethylene selectivity achieved by CO2-regenerated samples is mainly due to the higher resistance of lattice oxygen diffusion from bulk to surface.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Energy & Fuels
Siqi Liu, Fang He, Kun Zhao, Haibo Zhao, Zhen Huang, Guoqiang Wei, Wen Yang
Summary: Coal chemical looping gasification (CCLG) is a promising technology with high resource utilization rate and environmental protection properties, requiring suitable oxygen carriers and optimized operating conditions for coal conversion and H2&CO production. This study tested a Cu-Fe bi-ore oxygen carrier and found that the optimal gasification conditions were at 950 degrees C with a oxygen carrier-to-coal mass ratio of 3:1 and steam rate of 0.08 ml/min, achieving a syngas yield of 58 mmol/g, 75.2% syngas selectivity, and 85.3% carbon conversion.
Article
Engineering, Electrical & Electronic
Zhen Huang, Mi Tang, Dmitry Golovanov, Tao Yang, Scott Herring, Pericle Zanchetta, Christopher Gerada
Summary: This article introduces a new indicator FWTH to analyze the variations in eddy current losses in high-speed permanent magnet machines, and its application in plug-in hybrid electric vehicles is validated.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Chemistry, Applied
Yan Lin, Yuanrui Mo, Shiwen Fang, Zhen Huang, Guoqiang Wei, Zengli Zhao, Hongyu Huang
Summary: Chemical looping combustion (CLC) is a promising technology for sewage sludge disposal. This study investigates the emissions of NOx and its precursors during the pyrolysis and CLC processes, and examines the effects of temperature, ash accumulation, and reaction intermediates. The presence of CO2 and H2O enhances the oxidizability and promotes the formation of NOx. The results provide insights into the formation mechanisms of NOx in the CLC of sewage sludge and the removal efficiencies of NH3, HCN, and total N-containing pollutants.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Xiaoyu Yan, Shuheng Zhao, Jiatao Dang, Jianjun Hu, Panbo Yang, Zhen Huang, Wei Wang
Summary: In this study, phosphorus enrichment in sludge char was successfully induced by combining oxygen carrier gasification technology and microwave heating. The AOC prepared using a SiC particle size of 36 mesh and 10% iron loading achieved a phosphorus enrichment of 91.30% at a temperature of 600 degrees C. Additionally, AOC effectively increased the rate and depth of sludge gasification reaction.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Tao Jin, Hongtao Wang, Jiebang Peng, Yushan Wu, Zhen Huang, Xin Tian, Mingyue Ding
Summary: This study investigated the feasibility of using metal-modified HZSM-5 zeolite as catalysts for monocyclic aromatic hydrocarbons production in lignin catalytic pyrolysis. The 1%Co-HZ catalyst showed excellent performance and resistance to carbon deposition.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Automation & Control Systems
Cheng Wang, Tao Yang, Habibu Hussaini, Zhen Huang, Serhiy Bozhko
Summary: This article proposes a harmonic suppression scheme using a dc-dc converter as an active harmonic injector in a hybrid power generation center to cancel voltage harmonics on the HVdc bus. By developing simplified mathematical models and an active power sharing scheme, the magnitudes of targeted harmonics in the converters can be controlled to achieve harmonic cancellation. A closed-loop control scheme has been developed without additional hardware costs, demonstrating over 90% reduction of a specific harmonic component on the HVdc bus within the power generation center.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Xiaoyu Lang, Tao Yang, Zhen Huang, Cheng Wang, Zhenyu Wang, Serhiy Bozhko, Patrick Wheeler
Summary: This article introduces an advanced power generation center (APGC) that incorporates an extra back-to-back (BTB) converter to improve the stability for both engine and HVdc grid. The BTB converter connects the HP power generation channel and the LP channel, providing an additional power flow path between the two channels. Analytical findings of HVdc grid stability and stability improvement using the APGC architecture have been verified through simulation and experimental results.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Review
Engineering, Electrical & Electronic
Zhen Huang, Tao Yang, Paolo Giangrande, Michael Galea, Patrick Wheeler
Summary: This article provides a comprehensive overview of different structures based on dual inverters and evaluates their performance in MEA applications. The key features of adopting dual inverter topologies are explicitly demonstrated, and a practical guideline for choosing suitable dual inverters for different MEA applications is provided.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Energy & Fuels
Luwen Wang, Yan Lin, Zhen Huang, Kuo Zeng, Hongyu Huang
Summary: In this study, Zr0.5Ce0.5O2 was used to enhance the reactivity of Ca2Fe2O5 oxygen carriers and alleviate sintering issues. The addition of Zr0.5Ce0.5O2 led to improved carbon monoxide yield and cyclic performance of the modified oxygen carriers.
Article
Engineering, Electrical & Electronic
Yuan Gao, Charles Lausseme, Zhen Huang, Tao Yang
Summary: The increasing demand for passenger air travel has led to an unprecedented growth in the aircraft market. However, this growth also raises serious environmental concerns. In order to address this issue, the 2021 United Nations Climate Change Conference (COP26) has set a clear goal of achieving global net-zero emissions by midcentury while limiting temperature rise to 1.5 degrees Celsius. Hydrogen (H-2) propulsion technology is considered one of the most promising solutions to meet these targets and decarbonize the aviation industry. This article reviews the latest research on H-2-electric hybrid aircraft and discusses the potential benefits and challenges of using hydrogen fuel cells in airplanes.
IEEE ELECTRIFICATION MAGAZINE
(2022)
Article
Chemistry, Applied
Ju Huang, Kun Zhao, Shican Jiang, Shunshun Kang, Yan Lin, Zhen Huang, Anqing Zheng, Zengli Zhao
Summary: A novel composite oxide carrier doped by hetematoms was developed for the selective and stable production of C-2(+) hydrocarbons from methane in chemical looping oxidative coupling. Doping with Na improved the surface O- and Mn2+/Mn3+ species content, leading to higher C-2(+) selectivity and yield. Co-doping with W stabilized surface Na species, resulting in stable performance.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhen Huang, Yonghao Wang, Nanhang Dong, Da Song, Yan Lin, Lisheng Deng, Hongyu Huang
Summary: Tar removal is a crucial issue in biomass gasification, and chemical looping gasification technology shows advantages in low tar generation. Hematite OC exhibits good catalytic and oxidative performance in benzene cracking. Prolonged residence time enhances benzene removal, while the addition of water vapor inhibits benzene conversion.
Article
Engineering, Electrical & Electronic
Xiaoyu Lang, Tao Yang, Zhen Huang, Zhenyu Wang, Serhiy Bozhko, Patrick Wheeler
Summary: This article presents an instantaneous power control technique for regulating the power flow of a back-to-back converter in an advanced power generation center for more-electric aircraft applications. Compared with the previously proposed method, the IPC method allows independent control of active and reactive power transfer, improves dynamic response in power control, and eliminates tedious tuning of control parameters.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Automation & Control Systems
Feng Guo, Tao Yang, Ahmed M. Diab, Zhen Huang, Seang Shen Yeoh, Serhiy Bozhko, Patrick Wheeler
Summary: In this article, a hybrid active modulation approach is proposed to tackle the challenges faced by conventional pulsewidth modulation (PWM) strategies in the aircraft electric starter/generator system. The proposed approach includes coordinate-based PWM for startup process and enhanced carrier-based virtual-space-vector modulation technique for generation mode. Bias-offset injection in the time and voltage domain is used to maintain balanced capacitor voltages. Simulation and experimental results obtained from a test rig validate the effectiveness of the presented algorithm.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Review
Energy & Fuels
Zhen Huang, Xuechun Xiao, Yuan Gao, Yonghong Xia, Tomislav Dragicevic, Pat Wheeler
Summary: The global objective of achieving net-zero emissions drives a significant electrified trend by replacing fuel-mechanical systems with onboard microgrid (OBMG) systems for transportation applications. Energy management strategies (EMS) for OBMG systems require complicated optimization algorithms and high computation capabilities, while traditional control techniques may not meet these requirements. This article provides a comprehensive overview of both information technology, particularly elucidating the role of DT technology, and evaluates and analyzes emerging information technologies.
Article
Chemistry, Applied
Maoyi Yi, Jie Li, Mengran Wang, Xinming Fan, Bo Hong, Zhian Zhang, Aonan Wang, Yanqing Lai
Summary: In this study, polyacrylic acid (PAA) was used as a binder for the cathode in all-solid-state batteries. Through H+/Li+ exchange reaction, a uniform PAA-Li coating layer was formed on the cathode surface, improving the stability of the cathodic interface and the crystal structure. The SC-NCM83-PAA cathode exhibited superior cycling performance compared to traditional PVDF binder.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Yonghan Zhou, Zhongfeng Ji, Wenrui Cai, Xuewei He, Ruiying Bao, Xuewei Fu, Wei Yang, Yu Wang
Summary: By learning from the pencil-writing process, a solid-ink rubbing technology (SIR-tech) has been invented to develop durable metallic coatings on diverse substrates. The composite metallic skin by SIR-tech outperforms pure liquid-metal coating and shows great potential for various applications.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Ruiqi Tian, Hehe Zhang, Zeyu Yuan, Yuehua Man, Jianlu Sun, Jianchun Bao, Ming-Sheng Wang, Xiaosi Zhou
Summary: In this study, polypyrrole-encapsulated Sb2WO6 microflowers were synthesized and demonstrated to exhibit excellent potassium storage properties and cycling stability. The improved performance of Sb2WO6@PPy was attributed to the unique microflower structure, enhanced electronic conductivity, and protective PPy coating.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Review
Chemistry, Applied
Longxing Wu, Zhiqiang Lyu, Zebo Huang, Chao Zhang, Changyin Wei
Summary: This paper presents a comprehensive survey on physics-based state of charge (SOC) algorithms applied in advanced battery management system (BMS). It discusses the research progresses of physical SOC estimation methods for lithium-ion batteries and presents future perspectives for this field.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Honggang Huang, Yao Chen, Hui Fu, Cun Chen, Hanjun Li, Zhe Zhang, Feili Lai, Shuxing Bai, Nan Zhang, Tianxi Liu
Summary: The d-d orbital coupling induced by crystal-phase engineering effectively adjusts the electronic structure of electrocatalysts, improving their activity and stability, which is significant for electrocatalyst research.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Quanzhen Sun, Yifan Li, Caixia Zhang, Shunli Du, Weihao Xie, Jionghua Wu, Qiao Zheng, Hui Deng, Shuying Cheng
Summary: In this study, indium (In) ions were introduced into flexible Cu2ZnSn(S,Se)(4) (CZTSSe) solar cells to modify the back interface and passivate deep level defects in CZTSSe bulk. The results showed that In doping effectively inhibited the formation of secondary phase and V-Sn defects, decreased the barrier height at the back interface, passivated deep level defects in CZTSSe bulk, increased carrier concentration, and significantly reduced the V-OC deficit. Eventually, a flexible CZTSSe solar cell with a power conversion efficiency of 10.01% was achieved. This synergistic strategy of interface modification and bulk defects passivation through In incorporation provides a new approach for fabricating efficient flexible kesterite-based solar cells.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Negah Hashemi, Jafar Hussain Shah, Cejun Hu, Subhajit Nandy, Pavlo Aleshkevych, Sumbal Farid, Keun Hwa Chae, Wei Xie, Taifeng Liu, Junhu Wang, Mohammad Mahdi Najafpour
Summary: This study investigates the effects of Fe on the oxygen-evolution reaction (OER) in the presence of Au. The study identifies two distinct areas of OER associated with Fe and Au sites at different overpotentials. Various factors were varied to observe the behaviors of FeOxHy/Au during OER. The study reveals strong electronic interaction between Fe and Au, and proposes a lattice OER mechanism based on FeOxHy.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Yingshi Su, Yonghui Cheng, Zhen Li, Yanjia Cui, Caili Yang, Ziyi Zhong, Yibing Song, Gongwei Wang, Lin Zhuang
Summary: This study systematically investigates the key roles of Nafion on Cu nanoparticles electrocatalyst for CO2RR. The Nafion modifier suppresses the hydrogen evolution reaction, increases CO2 concentration and mass transfer process, and activates CO2 molecule to enhance C2 product generation. As a result, the selectivity of the hydrogen evolution reaction is reduced and the efficiency of C2 products is significantly improved.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Daijie Deng, Honghui Zhang, Jianchun Wu, Xing Tang, Min Ling, Sihua Dong, Li Xu, Henan Li, Huaming Li
Summary: By doping sulfur into vanadium nitride, the S-VN/Co/NS-MC catalyst exhibits enhanced oxygen reduction reaction activity and catalytic performance. When applied in liquid and flexible ZABs, it shows higher power density, specific capacity, and cycling stability.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Review
Chemistry, Applied
Yi Li, Fei Zhang
Summary: Self-assembly of metal halide perovskite nanocrystals holds significant application value in the fields of display, detector, and solar cell due to their unique collective properties. This review covers the driving forces, commonly used methods, and different self-assembly structures of perovskite nanocrystals. Additionally, it summarizes the collective optoelectronic properties and application areas of perovskite superlattice structures, and presents an outlook on potential issues and future challenges in the development of perovskite nanocrystals.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Anki Reddy Mule, Bhimanaboina Ramulu, Shaik Junied Arbaz, Anand Kurakula, Jae Su Yu
Summary: Direct growth of redox-active noble metals and rational design of multifunctional electrochemical active materials play crucial roles in developing novel electrode materials for energy storage devices. In this regard, silver (Ag) has attracted great attention in the design of efficient electrodes. The construction of multifaceted heterostructure cobalt-iron hydroxide (CFOH) nanowires (NWs)@nickel cobalt manganese hydroxides and/or hydrate (NCMOH) nanosheets (NSs) on the Ag-deposited nickel foam and carbon cloth (i.e., Ag/ NF and Ag/CC) substrates is reported. The as-fabricated Ag@CFOH@NCMOH/NF electrode delivered superior areal capacity value of 2081.9 μA h cm-2 at 5 mA cm-2. Moreover, as-assembled hybrid cell based on NF (HC/NF) device exhibited remarkable areal capacity value of 1.82 mA h cm-2 at 5 mA cm-2 with excellent rate capability of 74.77% even at 70 mA cm-2. Furthermore, HC/NF device achieved maximum energy and power densities of 1.39 mW h cm-2 and 42.35 mW cm-2, respectively. To verify practical applicability, both devices were also tested to serve as a self-charging station for various portable electronic devices.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Zanling Huang, Shuqi Zhu, Yuan Duan, Chaoran Pi, Xuming Zhang, Abebe Reda Woldu, Jing-Xin Jian, Paul K. Chu, Qing-Xiao Tong, Liangsheng Hu, Xiangdong Yao
Summary: In this study, it was found that Ni sites act as a host to attract Fe(III) to form Fe(Ni)(III) binary centers, which promote the oxygen evolution reaction (OER) activity and stability by cyclical formation of intermediates. Additionally, other ions can also catalyze the OER process on different electrodes.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Jie Zeng, Jian Bao, Ya Zhang, Xun-Lu Li, Cui Ma, Rui-Jie Luo, Chong-Yu Du, Xuan Xu, Zhe Mei, Zhe Qian, Yong-Ning Zhou
Summary: The balance between cationic redox and oxygen redox is crucial for achieving high energy density and cycle stability in sodium batteries. This study demonstrates the reversible Mn2+/Mn4+ redox in a P3-Na0.65Li0.2Co0.05Mn0.75O2 cathode material through Co substitution, effectively suppressing the contribution of oxygen redox and improving structure stability.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Daniela M. Josepetti, Bianca P. Sousa, Simone A. J. Rodrigues, Renato G. Freitas, Gustavo Doubek
Summary: Lithium-oxygen batteries have high energy density potential but face challenges in achieving high cyclability. This study used operando Raman experiments and electrochemical impedance spectroscopy to evaluate the initial discharge processes in porous carbon electrodes. The results indicate that the reaction occurs at the Li2O2 surface and the growth of Li2O2 forms a more compact and homogeneous structure.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Ziqi Zhang, Jinyun Xu, Yu Zhang, Liping Zhao, Ming Li, Guoqiang Zhong, Di Zhao, Minjing Li, Xudong Hu, Wenju Zhu, Chunming Zheng, Xiaohong Sun
Summary: This paper explores the challenge of increasing global CO2 emissions and highlights the role of porous metal oxide materials in electrocatalytic reduction of CO2 (CO2RR). Porous metal oxides offer high surface area and tunability for optimizing CO2RR reaction mechanisms.
JOURNAL OF ENERGY CHEMISTRY
(2024)
