Article
Energy & Fuels
M. S. Alias, S. K. Kamarudin, A. M. Zainoodin, M. S. Masdar
Summary: This study presents a surface characterization of the modified MPL of TiO2-CNF-CB and discusses in detail the mechanism on the power density drop due to increment of methanol concentration. The study also tests the performance and stability of the modified MPL. The results show that the mixture of TiO2-CNF-CB improved the stability of the DMFC over long-term performance testing.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
S. I. Schoffer, S. A. Klein, P. V. Aravind, R. Pecnik
Summary: New technologies are being developed to produce electricity cleaner and more efficiently, with promising technologies including solid oxide fuel cells and supercritical carbon dioxide Brayton cycles. The integration of these technologies has great potential, improving system efficiency and reducing the size of heat exchangers.
Article
Chemistry, Multidisciplinary
Hamid Reza Abbasi, Adel Yavarinasab, Shayan Roohbakhsh
Summary: This study evaluates the performance of a hybrid supercritical carbon dioxide (SCO2) power cycle coupled with a direct carbon fuel cell (DCFC) and found that the partial cooling SCO2 is a promising option. Integrating a supercritical CO2 cycle with DCFC can compensate for efficiency and power density loss due to fuel cell temperature decrease.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Physical
Wu Yujing, Zhou Hongxiu, Zhang Ao, Zhao Leqing
Summary: The research shows that flowing electrode direct methanol fuel cell (FEDMFC) effectively reduces methanol crossover rate while maintaining high power densities. Increasing flow rate can decrease crossover rate but will affect efficiency and stability, with optimal flow rate controlled at 1-3 sccm.
JOURNAL OF POWER SOURCES
(2022)
Article
Energy & Fuels
Yong Seok Kim, Jae Wook Lee, Byeongkyu Kim, Jong Wook Bae, Chan-Hwa Chung
Summary: A carbon-neutralized direct methanol fuel cell (DMFC) with two bifunctional electrodes, Pd-Ag and Pt-Zn, has been developed in this study. The system operates in two modes: fuel-cell mode and spontaneous CO2 reduction mode. The Pd-Ag electrode oxidizes methanol to CO2 and generates electricity in the fuel-cell mode, while CO2 is spontaneously reduced to CO on Pd-Ag in the next step. In contrast, Pt catalyzes oxygen reduction and Zn is sacrificially oxidized in the fuel-cell and CO2 reduction modes, respectively. The power densities in the fuel-cell and CO2 reduction modes are 12.11 mW/cm² and 11.76 mW/cm², respectively, with faradaic efficiencies of 98.81% for CO2 and 89.11% for CO.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Physical
Antonio Villalba-Herreros, Oscar Santiago, Ricardo Abad, Teresa J. Leo
Summary: The study on CO2 treatment methods for Autonomous Underwater Vehicles found that directly ejecting CO2 outside the vehicle is the best choice for navigation depths up to 50 meters, while storing CO2 in adsorbent materials or as pressurized gas is more suitable for deeper waters. The results showed good stability against changes in criteria weights in all cases.
JOURNAL OF POWER SOURCES
(2021)
Article
Multidisciplinary Sciences
N. A. I. M. Ishak, S. K. Kamarudin, S. N. Timmiati, N. A. Karim, S. Basri
Summary: This study introduces a biosynthesis method of platinum from plant extracts, which reduces the cost of platinum production and shows enhanced efficiency and stability, with potential for commercialization.
JOURNAL OF ADVANCED RESEARCH
(2021)
Article
Materials Science, Ceramics
Abdulrahman I. Alharthi, Israf Ud Din, Mshari A. Alotaibi, Gabriele Centi
Summary: Wet chemical method was utilized to synthesize cobalt ferrite nano-catalysts, which were annealed at different temperatures for investigation. Various analytical techniques were employed to study the physicochemical properties, revealing 750℃ as the optimal calcination temperature and demonstrating a correlation between methanol synthesis rate and ion distribution. Comparisons with literature showed efficient methanol synthesis rate for the cobalt ferrite nano-catalysts.
CERAMICS INTERNATIONAL
(2021)
Article
Energy & Fuels
Hazlina Junoh, Juhana Jaafar, Nik Abdul Hadi M. Nordin, Ahmad F. Ismail, Mohd H. D. Othman, Mukhlis A. Rahman, Farhana Aziz, Norhaniza Yusof, Syarifah Noor S. Sayed Daud
Summary: Porous poly ether sulfone (PES) membranes were prepared using two different solvents via dry/wet non-solvent phase inversion techniques, with membranes prepared using DMAc at 3 minutes solvent evaporation time showing desirable properties for proton conduction and methanol resistance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Youngseung Na, Prashant Khadke, Andreas Gluesen, Nicola Kimiaie, Martin Mueller, Ulrike Krewer
Summary: The electrochemical behavior of direct methanol fuel cells (DMFCs) is influenced by the concentration of methanol. Monitoring the methanol concentration in the fuel circulation loop is crucial for the efficient operation of DMFC systems. This study presents a robust electrochemical methanol sensing technique that is not affected by temperature, cell degradation, and membrane electrode assembly (MEA) type. The proposed method achieves high accuracy and is expected to enhance the reliability and control logic of DMFC systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Biochemistry & Molecular Biology
Livhuwani Modau, Rudzani Sigwadi, Touhami Mokrani, Fulufhelo Nemavhola
Summary: The purpose of this study was to identify the steps involved in fabricating silica/chitosan composite membranes and their suitability for fuel cell applications. The composite membranes were successfully modified with silica, showing exceptional results in terms of proton conductivity and methanol permeability.
Article
Chemistry, Physical
Guodong Xu, Yun Lei, Keyu Wu, Rongguan Lv, Jing Li, Xiujuan Sun, Weiwei Cai
Summary: In this study, CeO2 is modified through a plasma-phosphating combing strategy and invited as Frustrated Lewis Pair to assist the catalytic MOR process on Pt sites. This strategy also leads to negatively charged sites on CeO2 surface as a host for Pt anchoring, facilitating the even dispersion of Pt nanocrystals. Moreover, this strategy affects the Ce3+/Ce4+ ratio and vacancy oxygen ratio on CeO2 surface, which are critical for OH generation and anti-CO.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Nianfang Wan
Summary: This paper proposes accelerated stress test protocols for direct methanol fuel cell (DMFC) to simulate real-life operation conditions and shorten evaluation time. The cell exhibits long survival time and stable membrane/electrode interface, but degradation of gas diffusion layer (GDL) and catalysts are found to cause performance degradation.
JOURNAL OF POWER SOURCES
(2023)
Article
Energy & Fuels
Janusz Kotowicz, Mateusz Brzeczek, Aleksandra Walewska, Kamila Szykowska
Summary: This article introduces the concept of renewable methanol production in the gas turbine cycle and analyzes the impact of methanol reactor parameters on reactor power, yield, and efficiency. The research aims to investigate the integration of the system for renewable methanol production and additional electricity production. The results reveal that increasing pressure and decreasing temperature in the reactor can improve the efficiency of chemical conversion and the methanol reactor.
Article
Engineering, Environmental
Weijian Yuan, Chenjun Hou, Jianfeng Wu, Yufeng Zhang, Xuelin Zhang
Summary: Capillary distillation is applied for the first time to regulate methanol-water evaporation, reducing methanol crossover and water starvation in direct methanol fuel cells (DMFCs). This approach provides a suitable methanol/water ratio, allowing for high-concentration methanol operation with minimal structure. It greatly promotes the development of high-energy-density all-solid-state/flexible DMFCs and expands their potential integration in microsystems.
CHEMICAL ENGINEERING JOURNAL
(2023)
