Article
Chemistry, Multidisciplinary
Michael Filippi, Tim Moeller, Liang Liang, Peter Strasser
Summary: This work investigates the impact of catholyte flow compartment design and catholyte bubble flow characteristics on the electrocatalytic reactivity and product selectivity of a gas diffusion electrode inside a CO2 flow cell electrolyzer. The findings suggest that a homogenous fluid velocity distribution combined with fluid velocity in the range of 0.1-0.01 m/s is optimal for high yields in C2+ products at high current densities. The study also highlights the importance of gas bubble dynamics and local pH, which are influenced by the design architecture. The authors propose a hydrodynamic volcano model to explain the competition between bubble release rate and local pH. This work provides valuable insights for improving the performance of CO2 electroreduction systems.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Anqi Chen, Zhuo Chen, Zetian Qiu, Bo -Lin Lin
Summary: Enhanced weathering is a promising method for carbon dioxide removal, but accurately measuring its potential has been difficult due to slow weathering processes. Previous models estimated annual carbon dioxide removal potentials ranging from 1 to 95 Gt by 2100, exceeding anthropogenic CO2 emissions in 2021 (approximately 41 Gt). This raised concerns that active CO2 emissions mitigations might not be necessary. However, by partitioning the potential into flow-through and non-flow-through processes and developing an experimentally-calibrated model, we estimated the upper bound of carbon dioxide removal potentials to be 0.22 (±0.16) Gt annually and 17 (±13) Gt cumulatively by 2100, highlighting the significance and urgency to advance ultra-enhanced weathering strategies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Marina Ilkaeva, Ricardo Vieira, Joao Pereira, Mariana Sardo, Ildefonso Marin-Montesinos, Luis Mafra
Summary: Solid-state NMR is used to generate CO2 adsorption isotherms, allowing the differentiation between chemi- and physisorbed components and investigation of their respective adsorption mechanisms. The proposed method is validated by comparing with volumetric measurements, and the obtained isotherm curves provide advanced analysis of the sorbents.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Chengying Guo, Wei Zhou, Xianen Lan, Yuting Wang, Tieliang Li, Shuhe Han, Yifu Yu, Bin Zhang
Summary: This study reports an electrochemical process for converting formic acid and nitrite into formamide with high selectivity under ambient conditions. Isotope-labeled experiments reveal the key bond formation process. This work is significant for upgrading CO2-derived formic acid into high-value compounds.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Thermodynamics
Jiankun Shao, Rishav Choudhary, David F. Davidson, Ronald K. Hanson
Summary: We investigate the kinetics of the H2O2 decomposition system and find a significant discrepancy between the rate constants derived using the traditional linear mixing rule and the reduced pressure linear mixing rule. This discrepancy can have serious implications on the predictive accuracy of kinetic models, especially in conditions relevant to the operation of supercritical CO2 (sCO2) power cycles that rely on oxy-fuel combustion in a working fluid comprised almost entirely of CO2.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Geochemistry & Geophysics
Cyril Aubaud
Summary: Carbon dioxide emissions from volcanoes are crucial in understanding the Earth system and its impact on climate. Studying the carbon concentration and stable isotope ratios in magmas can help determine the mode of degassing and apply appropriate corrections to estimate the initial CO2 content. This review emphasizes that different magmas have diverse degassing modes, and a single model cannot explain the geochemical evolution of all magmas.
Article
Food Science & Technology
Xuan Zhou, Wanfeng Hu, Jiaxing Li, Aamir Iqbal, Ayesha Murtaza, Xiaoyun Xu, Siyi Pan
Summary: This study evaluated the effects of high-pressure carbon dioxide treatment and vacuum packaging on the yellowing of peeled Chinese water chestnut during storage. It was found that the HPCD+VP treatment significantly delayed the yellowing, reduced enzymatic activities, and inhibited cell membrane peroxidation.
FOOD PACKAGING AND SHELF LIFE
(2022)
Article
Chemistry, Multidisciplinary
Xiaodong Ma, Xinning Song, Libing Zhang, Limin Wu, Jiaqi Feng, Shunhan Jia, Xingxing Tan, Liang Xu, Xiaofu Sun, Buxing Han
Summary: By doping lead into Cu2O catalyst, the local electronic structure of Cu can be modified to improve the efficiency of CO2RR reaction, converting CO2 to C-2 hydrocarbons and oxygenate. The experimental results showed that the lead-doped catalyst achieved a C-2 faradaic efficiency of 83.9% and a current density of 203.8 mA cm(-2) at -1.1 V vs. RHE in a flow cell. X-ray absorption spectroscopy and Raman spectroscopy revealed that lead doping stabilized the Cu-0-Cu+ structure, enhanced CO adsorption and C-C coupling, leading to high activity for C-2 product formation. Theoretical calculations also indicated that lead doping lowered the energy barrier for both CO2 activation and C-C coupling processes.
Article
Chemistry, Physical
Joaquim Miguel Badalo Branco, Ana Cristina Ferreira, Joana Filipa Martinho
Summary: Nickel- and cobalt-cerium bimetallic oxides are effective catalysts for the methanation of CO2. Pressure has a significant impact on catalyst activity, with an increase in pressure resulting in higher methane yield. Nickel-cerium bimetallic oxides exhibit the best performance, while cobalt-cerium bimetallic oxides show a particularly strong response to pressure. The catalysts' behavior follows the Langmuir-Hinshelwood-Hougen-Watson kinetic model, and the formation of cobalt carbides plays an important role in the catalytic process.
Article
Chemistry, Applied
Xuan Wang, Xiaoni Xuan, Yabin Wang, Xiaoyu Li, Hongwei Huang, Xueji Zhang, Xin Du
Summary: In this study, dendritic porous silica nanospheres were used as a carrier to grow TiO2 nanoparticles and load gold nanoparticles, leading to the successful construction of a series of DPSNs@TiO2@Au nanocomposites. Under simulated sunlight irradiation, DPSNs@TiO2@Au with appropriate size of Au NPs (3-5 nm) exhibited superior CH4 and CO production rates as well as high cycle stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Geochemistry & Geophysics
Xiang Li, Yuan Cheng, Wulong Tao, Shalake Sarulicaoketi, Xuhui Ji, Changhe Yin
Summary: This paper studies the feasibility and optimization parameters of nitrogen injection development of fractured reservoirs through experiments, showing that nitrogen injection can increase early production but gas channeling needs to be avoided. Gas-water alternate flooding can reduce injection pressure and improve recovery.
Article
Chemistry, Multidisciplinary
Xunliang Hu, Lirong Zheng, Shengyao Wang, Xiaoyan Wang, Bien Tan
Summary: The possibility of single site distribution of Co2+ was proven using bipyridine-containing covalent triazine framework (CTF-Bpy). The Co2+-loaded CTF-Bpy-Co produced 120 μmol CO with a selectivity of 83.8% over 10 hours of irradiation (>420 nm). This work highlights the promising potential of single metal sites loaded with CTFs for photocatalytic CO2 reduction.
CHEMICAL COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Beatriz Gimeno, Inmaculada Velasco, Javier Fernandez, Sofia T. Blanco
Summary: The impact of CO2-rich mixtures containing SO2 and CO impurities on the transport, injection, and storage of CCS technology was evaluated using experimental data. It was found that in the cocapture mixture, SO2 can overcome or compensate for the negative effect of CO, making it a favorable fluid for CCS, while the negative effect of CO predominates in the emissions mixture. The study did not consider differences in chemical reactivity due to the impurities.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Chemistry, Multidisciplinary
Erwin Lam, Erwin Reisner
Summary: By immobilizing a phosphonated cobalt bis(terpyridine) catalyst on TiO2 nanoparticles, a photocatalyst was created that can reduce CO2 to syngas while oxidizing biomass to formate. This hybrid photocatalyst, composed of earth-abundant components, shows efficient cellulose-to-formate conversion yield and can be reused multiple times in aqueous solution. The concept of valorizing two waste streams (CO2 and biomass) into value-added chemicals through solar-driven catalysis is successfully demonstrated.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Forestry
Diego Elustondo, Laura Raymond, Regis Risani, Lloyd Donaldson, Marie Joo Le Guen
Summary: This study aims to explore a new method of impregnation using supercritical carbon dioxide. The experiment demonstrates the feasibility of this method under the conditions of temperature between 40 and 60 degrees C, pressure between 12 and 16 MPa, with the addition of ethanol and acetone as co-solvents, proving that solutes can be extracted from one material and impregnated into another material.
Article
Engineering, Chemical
Michael D. Lundin, Mark J. McCready
CHEMICAL ENGINEERING SCIENCE
(2009)
Article
Engineering, Biomedical
Stephanie M. Schmidt, Kathleen A. Moran, Ailis M. Tweed Kent, Jenalle L. Slosar, Matthew J. Webber, Mark J. McCready, Cassandra Deering, John M. Veranth, Agnes Ostafin
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2008)
Article
Thermodynamics
Brian R. Novak, Edward J. Maginn, Mark J. McCready
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2008)
Article
Chemistry, Physical
Burcu E. Gurkan, Thomas R. Gohndrone, Mark J. McCready, Joan F. Brennecke
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2013)
Article
Chemistry, Physical
Michael D. Lundin, Mark J. McCready
JOURNAL OF POWER SOURCES
(2007)
Article
Materials Science, Multidisciplinary
Brian R. Novak, Edward J. Maginn, Mark J. McCready
Article
Biophysics
SM Schmidt, MJ McCready, AE Ostafin
JOURNAL OF BIOMECHANICS
(2005)
Article
Engineering, Chemical
BA Wilhite, B Blackwell, J Kacmar, A Varma, MJ McCready
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2005)
Article
Engineering, Chemical
X Huang, A Varma, MJ McCready
CHEMICAL ENGINEERING SCIENCE
(2004)
Article
Engineering, Chemical
X Huang, B Wilhite, MJ McCready, A Varma
CHEMICAL ENGINEERING SCIENCE
(2003)
Article
Engineering, Chemical
BA Wilhite, X Huang, MJ McCready, A Varma
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2003)
Article
Engineering, Chemical
BA Wilhite, MJ McCready, A Varma
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2002)
Article
Engineering, Chemical
BA Wilhite, R Wu, X Huang, MJ McCready, A Varma
Article
Mechanics
MR King, MJ McCready
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)