Article
Chemistry, Physical
Hector R. Colon-Mercado, Scott A. Mauger, Maximilian B. Gorensek, Cy H. Fujimoto, Aaron A. Lando, Prabhu Ganesan, Benjamin H. Meekins, Noah D. Meeks
Summary: This research achieved the most efficient SO2-depolarized electrolysis (SDE) operation at high sulfuric acid concentrations through the optimization of operating conditions and cell components. Open porosity in the porous transport media (PTM) plays a significant role in SDE performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Kalpana Garg, Mukesh Kumar, Sukhjot Kaur, Tharamani C. Nagaiah
Summary: By designing a highly efficient electrocatalyst, CoCd-(x:y)-S (n), we have successfully promoted the sulfide oxidation reaction and driven the anode reaction at an onset potential of 0.25 V vs RHE, which is 1.27 V lower than that required for water oxidation reaction. Moreover, we have achieved 98% H-2 Faradaic efficiency with remarkable stability of 120 h. Thus, this method opens a path for the high-value utilization of hazardous waste H2S and demonstrates its great potential for hydrogen production and sustainable energy applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Thermodynamics
Ahmad Seyfaee, Mehdi Jafarian, Gkiokchan Moumin, Dennis Thomey, Claudio Corgnale, Christian Sattler, Graham J. Nathan
Summary: This study examines the potential of the hybrid sulfur cycle, combining concentrated solar thermal energy with electrolysis, for green hydrogen production. Integration of this cycle with a copper processing plant has the potential to reduce carbon dioxide emissions and operational expenditure in copper refineries, particularly for ores with high sulphide content.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Zhi Ying, Jingyang Yang, Xiaoyuan Zheng, Binlin Dou, Guomin Cui
Summary: This study conducted a numerical analysis of the SO2-depolarized electrolysis (SDE) to reveal its microscopic characteristics and explore the impacts of main operating parameters, proposing a feasible operating condition for improving the SDE process. The developed model and microscopic characterization of SDE will favor the design and optimization of the electrolytic cell for SDE process.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Chemistry, Physical
Cyrielle Dolle, Neha Neha, Christophe Coutanceau
Summary: Thermodynamic data suggests that oxidation of oxygenated organic species from biomass can reduce cell voltage in an electrolysis cell. An attractive solution to decrease hydrogen production costs and promote other economic activities is to directly valorize wastes from agriculture/forestry and biofuel industries.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Yudong Xue, Yunting Wang, Zhenhua Pan, Kazuhiro Sayama
Summary: This paper reviews recent developments in EC/PEC H2O2 production through water oxidation, including fundamental aspects, benchmark activity evaluation, material/catalyst selection, and strategies for increasing selectivity, efficiency, and accumulation. The challenges and outlook for water oxidation in H2O2 production are also discussed, with a focus on device-level development, accumulation and stability, and industrial applications. The review aims to inspire further research in improving EC/PEC H2O2 production.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Shi He, Yufeng Chen, Mengdi Wang, Hanggai Nuomin, Peter Novello, Xueqian Li, Siyuan Zhu, Jie Liu
Summary: Ammonia is a promising hydrogen mediator that reduces the cost of hydrogen transportation, but improvements are needed for extracting hydrogen. Ammonia electrolysis is a convenient method for low-cost hydrogen production. Nickel-cobalt nitride nanosheets show high electrocatalytic activity for the ammonia oxidation reaction in non-aqueous solutions.
Article
Engineering, Chemical
Uk Jeong, Gwangtaek Lee, Hak Joon Kim, Kwiyong Kim, Jong-In Han
Summary: In this study, a functional electrochemical system that combines mineralization of sulfur dioxide, purification of carbon dioxide, and production of hydrogen is proposed as a sustainable solution for air pollution control, carbon neutrality, and energy production.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Ze Wu, Yiqiong Zhang, Li Zhang, Bo Zhou, Zengxi Wei, Dongdong Wang, Wenbo Lu, Jianfeng Jia, Li Tao, Tehua Wang, Shuangyin Wang
Summary: This work proposes a Fe(II)/Fe(III) redox mediated SO2 conversion method for simultaneous hydrogen production and sulfur dioxide capture at low voltage. Experiments show that SO2 in the electrolyte can reduce Fe(III) to Fe(II), completing the Fe(II)/Fe(III) redox cycle and the conversion of SO2 to sulfuric acid. The assembled flow cell electrolyzer exhibits good performance under low voltage.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Sibel Uygun Batgi, Ibrahim Dincer
Summary: This study describes a multigeneration system that utilizes a hybrid sulfur cycle and solar power towers to produce useful outputs such as hydrogen and freshwater. The overall energy and exergy efficiencies for the system are determined to be 8.15% and 3.73%, respectively. This integrated system represents a promising solution for renewable hydrogen production and freshwater generation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Bertrand Reuillard, Cyrille Costentin, Vincent Artero
Summary: Nickel bisdiphosphine complexes with pendant amines exhibit unique catalytic behavior, capable of bidirectional/reversible electrocatalytic oxidation and hydrogen production. This behavior is attributed to the presence of proton relays near the metal center. The study on the arginine derivative [Ni((P2N2Arg)-N-Cy)(2)](6+) provides a mechanistic model and kinetic treatment that can be applied to other DuBois' catalysts, demonstrating a good agreement with experimental data under various conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Green & Sustainable Science & Technology
Rui Wang, Kai Yang, Cindy Wong, Horacio Aguirre-Villegas, Rebecca Larson, Fikile Brushett, Mohan Qin, Song Jin
Summary: The researchers have developed an electrochemical strategy using a KNiHCF electrode to efficiently recover ammonia from livestock manure wastewater. This strategy not only allows for effective nutrient recovery, but also decentralized fertilizer and chemical production. The proposed approach shows notable economic potential and environmental benefits, paving the way for sustainable agriculture.
NATURE SUSTAINABILITY
(2023)
Article
Chemistry, Multidisciplinary
Tuncay Erdil, Ersu Lokcu, Ilker Yildiz, Can Okuyucu, Yunus Eren Kalay, Cigdem Toparli
Summary: Perovskite oxide materials have shown potential as oxygen evolution reaction (OER) electrocatalysts due to their high intrinsic activity. However, the long-term stability of these materials is still debatable. In this study, a new hexagonal double perovskite oxide, 2H-Ba2CoMnO6-delta (BCM), was synthesized using an A-site management strategy. The BCM oxide exhibited outstanding OER activity and excellent long-term stability without segregation or structural change. By substituting Ba with La, changes in crystal and electronic structure were observed, revealing a relationship between structure, oxygen vacancies, work function, and activity for BaxLa2-xCoMnO6-delta (x = 0, 0.5, 1, 1.5, 2) electrocatalysts.
Article
Materials Science, Multidisciplinary
Xuan Zhao, Hao Yang, Jie Xu, Tao Cheng, Yanguang Li
Summary: This study demonstrates the preparation of bimetallic PdAu nanoframes, which exhibit excellent H2O2 production in acidic solutions and can be used for electro-Fenton reaction for the degradation of organic dyes.
ACS MATERIALS LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Qizhu Qian, Yin Zhu, Nazir Ahmad, Yafei Feng, Huaikun Zhang, Mingyu Cheng, Huanhuan Liu, Chong Xiao, Genqiang Zhang, Yi Xie
Summary: Electrochemical water splitting powered by renewable energy sources has attracted interest for high-purity hydrogen production, but is hindered by slow electrode reactions. To address this, a hybrid electrochemical water splitting strategy has been proposed, combining favorable electro-oxidation reactions with hydrogen evolution at the cathode. This review summarizes recent developments in alternative oxidation reactions for efficient and cost-effective hybrid water splitting.
ADVANCED MATERIALS
(2023)
Article
Energy & Fuels
Rapha Julysses Perez, Alan C. Brent, James Hinkley
Summary: The study examined the feasibility of green hydrogen as a transport fuel for very heavy vehicles in New Zealand. It found that green hydrogen demand for VHVs is 71 million kg per year, with electricity cost being the most significant cost parameter for production. Implementing a large-scale decentralized hydrogen production system from purely renewable sources can meet the demand, but cost reduction measures are needed for further viability.
Article
Electrochemistry
Marveh Forghani, Amanda P. Cameron, Scott W. Donne
Summary: This study compares and contrasts the mechanisms of charge storage in four typical electrochemical capacitor systems based on activated carbon, ruthenium dioxide, manganese dioxide, and nickel hydroxide. While activated carbon and ruthenium dioxide store delocalized charge, manganese dioxide localizes charge in alkaline electrolytes. Nickel hydroxide, on the other hand, exhibits charge localization in alkaline electrolytes due to its two-phase redox mechanism.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Danielle Butts, Juergen Schoiber, Christopher Choi, Guenther J. Redhammer, Nicola Huesing, Scott Donne, Bruce Dunn
Summary: This paper converted the well-known superionic conductor Na beta''-Al2O3 into a high-rate Na+ negative electrode by substituting Fe for Al, achieving mixed electron-ion conduction. The Fe-substituted Na beta''-Al2O3 exhibited high ionic conductivity and high-rate performance, with a surface-controlled charge-storage mechanism responsible for the latter. This transformation provides design rules for achieving high-rate redox electrodes from solid-state electrolytes.
CHEMISTRY OF MATERIALS
(2021)
Article
Electrochemistry
Sofia B. Davey, Amanda P. Cameron, Kenneth G. Latham, Scott W. Donne
Summary: This study used step potential electrochemical spectroscopy to characterize the dynamics of charge storage on a planar non-porous glassy carbon electrode in an aqueous electrolyte, revealing diffuse nature of electrolyte charge storage that extends a substantial distance even for concentrated electrolytes. This finding challenges the expected parallel planes of charge for double layer formation at the interface and has implications for the use of porous materials.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
Amanda P. Cameron, Sofia B. Davey, Caitlin L. Callahan, Scott W. Donne
Summary: This study provides insights into the structure and behavior of the electrified interface between a planar non-porous glassy carbon electrode and a 0.5 M Na2SO4 aqueous solution. By using a rotating glassy carbon disk electrode, it is observed that increasing rotation rates lead to decreasing boundary layer thicknesses and interfacial capacitance. This suggests that electrolyte counter charge extends significantly into the electrolyte due to the dissipation of counter charge through convective flow outside the macroscopically thick boundary layer.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Review
Green & Sustainable Science & Technology
R. Duggal, R. Rayudu, J. Hinkley, J. Burnell, C. Wieland, M. Keim
Summary: This article discusses the technical feasibility of low-temperature geothermal energy extraction in hydrocarbon fields, emphasizing the importance of economic, technical, and geological parameters. It also highlights the uncertainty of resource behavior and the lack of discussion on sustainable resource management in such fields. Reservoir and wellbore simulations are suggested to improve understanding of resource behavior and evaluate reservoir capability for longer sustainability.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Tahereh Jalalabadi, Behdad Moghtaderi, Jessica Allen
Summary: The study found that increasing pressure helps delay the removal of volatiles. Carbonate forms a liquid cover on the surface of char, affecting gas generation and movement, allowing volatiles more reaction time. Biomass increases porosity under the influence of pressure and carbonate, while lignin devolatilization is promoted.
REACTION CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
James T. Hinkley, Alexander R. Heenan, Adrian C. S. Low, Matthew Watson
Summary: This paper describes a case study on using 600 MW of power from New Zealand's Manapouri Power Station to produce hydrogen for export. Different hydrogen carriers were considered with varying energy availability and costs, with electricity costs contributing significantly to the total costs. Liquid hydrogen appears to be the most versatile carrier in the long term, but requires significant infrastructure investment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Alan Colin Brent, Donald MacKenzie, James Hinkley
Summary: This study investigates the potential implications of a 1-gigawatt peak fleet of floating photovoltaic (FPV) systems on seven hydro schemes in Aotearoa New Zealand. The results demonstrate that FPV systems can provide additional electricity generation when controlled hydropower storage is low, and a wider rollout can help replenish the reservoirs after the country's winter peak in electricity demand.
JOURNAL OF THE ROYAL SOCIETY OF NEW ZEALAND
(2022)
Article
Engineering, Chemical
Nouman Rafique Mirza, Debra Fernandes, Qiyuan Li, Amr Omar, Shuaifei Zhao, Zongli Xie, Robert Taylor, Jessica Allen, Paul Feron
Summary: In this study, the integration of vacuum membrane distillation (VMD) with direct air capture (DAC) process was evaluated as a sustainable combined water-CO2 recovery approach. Four different VMD modules were used in the experiments, and the results showed that a commercially available LiquiCel module and a custom-made hollow fiber module were the most durable and produced the highest distillate fluxes. These modules also exhibited high removal rates of salinity, dissolved oxygen, and showed some basic species moving across the membranes. Furthermore, the results indicated that coupling DAC with VMD represents a viable pathway for sustainably reclaiming water from industrial processes and carbon capture systems for power plants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Tahereh Jalalabadi, Jimmy Wu, Behdad Moghtaderi, Neeraj Sharma, Jessica Allen
Summary: Carbonate gasification causes exfoliation of graphite to form turbostratic carbon at 800°C. Treatment with molten ternary eutectic carbonate leads to significant changes in the lattice distance of graphene sheets in graphite above 750°C. Approximately 50% of graphite experiences interlayer expansion, modifying the conventional d spacing of 0.34 nm to intervals between 0.41 nm and 1.22 nm.
Article
Electrochemistry
Thibaud Guillemin, Camille Douard, Anthony Impellizzeri, Christopher P. Ewels, Bernard Humbert, Christophe Lethien, Scott W. Donne, Jean Le Bideau, Thierry Brousse
Summary: We investigated the contribution of pseudocapacitance to the overall capacitance of MnO2 electrodes in pure and alkaline-doped ionic liquids using step potential electrochemical spectroscopy (SPECS) and in situ Raman spectroscopy. Pseudocapacitive charge storage accounted for over half of the total capacitance with alkaline-doped ionic liquids. In situ Raman spectroscopy provided insight into the reversible ion intercalation in the MnO2 structure.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Jimmy Wu, Matthew A. Hughes, Neeraj Sharma, Jessica Allen
Summary: This study investigates the generation of hard carbons from CO2 and their application in ion batteries. The results show that the electrodeposited hard carbons exhibit high capacity and capacity retention in sodium-ion batteries, making them suitable for next-generation batteries.
Proceedings Paper
Computer Science, Artificial Intelligence
Anu Choudhary, John Burnell, Ramesh Rayudu, Jim Hinkley
Summary: This paper discusses the greenhouse gas emissions from geothermal power plants in New Zealand, highlighting the need to reduce emissions for reaching net-zero emission goals by 2050. The reinjection of separated brine plays an important role in reducing environmental impacts caused by gas emissions.
2021 IEEE REGION 10 CONFERENCE (TENCON 2021)
(2021)
Article
Materials Science, Multidisciplinary
Kenneth G. Latham, Marveh Forghani, Wesley M. Dose, Jessica A. Allen, Scott W. Donne
Summary: This study explored the influence of four different attached counter ions on the physicochemical properties and electrochemical performance of carbon structures nitrogen-doped via hydrothermal carbonization of ammonium. The results showed significant differences in nitrogen incorporation levels, physicochemical properties, and supercapacitor performance among the different counter ions. The findings suggest that the choice of counter ion can play a crucial role in tailoring the properties of the resulting material.
MATERIALS ADVANCES
(2021)
