Article
Chemistry, Physical
Ewelina Urbanczyk, Marta Wala, Agata Blacha-Grzechnik, Agnieszka Stolarczyk, Artur Maciej, Wojciech Simka
Summary: This study presents a simple method for preparing electrocatalytic materials for methanol oxidation, utilizing a composite of nickel, cobalt, and graphene. Electrodes prepared through an electrochemical deposition process exhibited stable performance and optimal results were achieved with a specific current density, showing promising catalytic properties for methanol electrooxidation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
M. Sarfaraz, M. Mirjalili, S. A. Sajjadi, J. Vahdati Khaki, H. R. Azimaee
Summary: Transition metal oxides are considered as anode catalysts in direct methanol fuel cells. This study synthesizes NiO-Ni catalyst through solution combustion synthesis and investigates the effects of fuel type and fuel to oxidizer ratio. The catalytic activity of the product towards methanol oxidation varies with different conditions, and the dependence on temperature and morphology is discussed. It is concluded that solution combustion synthesis improves catalytic performance, and samples with dominant NiO show better activity, especially when synthesized using glycine under explosive conditions (F/O = 0.83).
MATERIALS TODAY CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
E. E. Abdel-Hady, Ahmed Gamal, Hany Hamdy, Mohamed Shaban, M. O. Abdel-Hamed, Mahmoud A. Mohammed, Wael M. Mohammed
Summary: Prepared Ni1-xCrx nanoparticle samples loaded onto carbon nanofibers were studied for their electrocatalytic performance in methanol oxidation. Various techniques were used to analyze the samples' stoichiometry, structure, surface morphology, and electrochemical activity. It was found that adding Cr to Ni increased the activation energy of the electrooxidation reaction and improved the electrode stability. A powerful Ni-Pt-Cr-based catalyst for methanol electrooxidation was successfully fabricated using a novel approach.
SCIENTIFIC REPORTS
(2023)
Article
Green & Sustainable Science & Technology
Bo-Qiang Miao, Ya-Chong Liu, Yu Ding, Pu-Jun Jin, Pei Chen, Yu Chen
Summary: In this study, high-quality chlorine-free Rh nanodendrites (Rh-NDs) were successfully synthesized by a simple one-step chemical-reduction method. Rh-NDs exhibited high electroactivity for methanol oxidation reaction (MOR) in alkaline direct methanol fuel cells. Under optimal experimental conditions, Rh-NDs showed a significant enhancement in electroactivity and durability for MOR compared to irregular Rh nanocrystals, thanks to their dendritic morphology that provides a large specific surface area, rich corner/edge atoms, and efficient aggregation inhibition.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Zhen Wang, Shuqi Hu, Asad Ali, Hongling Chen, Pei Kang Shen
Summary: The study presents a synthesis method for a core-shell nanostructure catalyst with Ag nanocubes enclosed by PtRh nanoparticles as a trimetallic Ag@PtRhAg NC, aimed at enhancing the methanol oxidation reaction (MOR). With a pleated exterior providing more active sites and the synergistic effect between Pt, Rh, and Ag, Ag@PtRhAg NCs exhibit significantly higher catalytic activities compared to commercial Pt/C. Additionally, the CO tolerance of Ag@PtRhAg NCs contributes to their strengthened durability, maintaining 84.9% mass activity after 1000 MOR cycles.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Energy & Fuels
Parisa Akbarian, Mehdi Kheirmand, Monireh Faraji
Summary: A novel electrocatalyst based on graphene quantum dots-supported manganese oxide and silver (GQDs/Mn3O4/Ag) is synthesized through electrodeposition, and it exhibits superior performance and durability in oxygen reduction reaction compared to 20% Pt/C.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Analytical
Ayan Mukherjee, Wei-Nien Su, Chun-Jern Pan, Suddhasatwa Basu
Summary: A facile one pot synthesis route was adopted to prepare Pd@CuO/C core-shell nanostructure for ethylene glycol oxidation. The nanostructure exhibited enhanced electro-catalytic performance, lower Tafel slope and charge transfer resistance compared to Pd/C, attributed to the modification of the electronic structure of Pd and CuO due to the formation of core-shell structure.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Kimberly Waters, Diana Nguyen, Lauren Hernandez, Kelly Vu, Allyson Fry-Petit, Stevan Pecic, John L. Haan
Summary: This work demonstrates the first alkaline direct liquid fuel cell powered by butanediol (BD) and examines the performance and product formation differences among the four linear isomers of BD. The research shows that the 1,4-BD isomer has the highest maximum power density and potential for strong power output. Additionally, the analysis reveals the impact of the relative position of the alcohol groups on the adsorption of the molecule and the performance of the fuel cell.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Mohammad Bagher Askari, Seyed Mohammad Rozati
Summary: This study successfully synthesized a three-component nanocatalyst composed of cobalt oxide, nickel sulfide, and reduced graphene oxide, and reported their application in alcohol fuel cells. The addition of reduced graphene oxide increased the specific surface area and electrical conductivity of the nanocatalyst, resulting in improved efficiency in the methanol and ethanol electrooxidation processes. Furthermore, the CNR nanocatalyst exhibited high stability in the oxidation reactions of methanol and ethanol.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Belqasem Aljafari, Subramanian Arulmani, Arash Takshi, Sambandam Anandan
Summary: Fuel cells, including Direct Methanol Fuel Cells (DMFC), are being studied as an effective and sustainable energy source. This work proposes a green strategy for decorating palladium nanoparticles on graphene carpets using glucose as a reducing and stabilizing agent. The electrochemical performance of the composite material, Pd/rGO, shows higher activity and better stability in methanol oxidation compared to other samples.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Energy & Fuels
Humayra Begum, Mohammed M. Rahman, Mohammad A. Hasnat
Summary: A PtAuCo trimetallic electrode was prepared using a simple electrochemical deposition technique for investigating methanol electro-oxidation. The electrode exhibited higher stability and resistance to CO adsorption compared to conventional Pt and PtAu electrodes.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Inorganic & Nuclear
Guanlun Guo, Jing Yu, Mingrui Wei
Summary: In this study, an Ag-CeO2-LSCF composite catalyst was prepared by impregnation method. The change in catalytic soot performance of the LSCF catalyst before and after composite was investigated. The results showed that the A-C-L composite catalyst exhibited a good microstructure and had lower characteristic temperatures compared to pure LSCF. The catalytic performance of the A-C-L composite catalyst was found to be the best when the Ag content was 8 wt%.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Fangfang Ren, Lijie Xu, Hui Xu, Yiwen Tang, Zongtang Liu, Yukou Du
Summary: Developing a simple, one-pot method for preparing Pd-Ag alloy network catalysts using NaBH4 and CTAB was found to be effective in enhancing catalytic properties, particularly for ethylene glycol electro-oxidation. The addition of Ag not only reduced Pd consumption but also improved the performance of the catalyst, potentially optimizing the design of high-performance Pd-based catalysts for fuel cells and related applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Physical
Xueqin Mu, Suli Liu, Lei Chen, Shichun Mu
Summary: This review analyzes and summarizes the strategies of noble and non-noble metal catalysts for enhancing the catalytic performance of the hydrogen oxidation reaction in alkaline fuel cells. By manipulating the catalyst's geometry, composition, atom-doping, oxyphilic site, and substrate engineering, breakthroughs in the sluggish kinetics of the reaction are sought after. Furthermore, the challenges, opportunities, and future research trends in alkaline HOR are proposed.
Article
Chemistry, Physical
Vicente Galvan, Bharat Shrimant, Chulsung Bae, G. K. Surya Prakash
Summary: In recent years, direct alkaline fuel cells have seen a rapid performance increase due to improvements in the anion exchange membrane and oxygen reduction reaction electrocatalysts. Research has shown that changing the cation structures of anion exchange ionomers plays a significant role in methanol oxidation reactions on PtRu/C catalysts. Additionally, the use of a poly(terphenylene) membrane and anode containing anion exchange ionomers can achieve high power densities with low catalyst loading.
ACS APPLIED ENERGY MATERIALS
(2021)
