Article
Chemistry, Physical
Jing Jiang, Shiyu Yang, Huili Lei, Lunhong Ai
Summary: Porous carbon nanostructures as supports can stabilize highly dispersed metal nanoparticles and facilitate mass transfer in reactions; catalytically active porous structures were synthesized and characterized for the efficient catalytic hydrolysis of NaBH4; the prepared Co@NC-600 sample shows high activity due to the catalytically active metallic Co and suitable support effect of N-doped carbon.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
O. V. Netskina, E. S. Tayban, V. A. Rogov, A. M. Ozerova, S. A. Mukha, V. I. Simagina, O. V. Komova
Summary: In the study, it was found that cobalt catalysts are more active than nickel catalysts in the hydrolysis of sodium borohydride. One reason for the lower activity of nickel catalysts is the presence of hydrogen on its surface, which interferes with reactant adsorption. The addition of cobalt to nickel catalysts can enhance hydrogen generation rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Dinh Trinh Tran, Tap Huu Van, Yu-chih Tsai, Kun-Yi Andrew Lin, Tuan Dinh Duong
Summary: This study reports the design and fabrication of a cobalt-based catalyst for the hydrolysis of sodium borohydride (NaBH4), which shows excellent catalytic activity and stability. The hierarchical porous hollow core-shell framework cobalt oxide (HCSCO) catalyst exhibits a high H-2 generation rate and a low activation energy. Compared to other catalysts, HCSCO demonstrates superior performance. This research provides a valuable strategy for the synthesis and fabrication of efficient catalysts.
Article
Chemistry, Physical
Mohammad Hassan Loghmani, Mona Jalali Rad
Summary: In this study, the use of extracted Glucomannan from Orchis Mascula as a matrix for stable cobalt catalysts in the hydrolysis of sodium borohydride for hydrogen generation was explored. The size, morphology, and activity of Co-glucomannan powders were studied by varying MAA/MBA ratios, with characterization done using XRD, XPS, FE-SEM, and TEM techniques. The catalytic activity of Co-glucomannan was tested on the hydrolysis of sodium borohydride, and kinetic studies were used to determine the partial order respect to catalyst dosage and initial concentration of sodium borohydride. The activation energy of the reaction was calculated using the Arrhenius equation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Muhammad Tariq, Meesam Ali, Yali Li, Jinli Han, Fandi Ning, Lei He, Min Shen, Chuang Bai, Hanqing Jin, Xiaochun Zhou
Summary: Continuous, flexible, and pure hydrogen gas supply is a key factor to be solved for researchers in the field of portable fuel cells. In this study, a novel composite material called catalytic decorated polydopamine coated sponge (CDPCS) was synthesized to generate and store hydrogen gas. The performance of CDPCS in terms of hydrogen production was investigated and the results showed promising potential for portable electronic devices.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Environmental Sciences
Aishah Mahpudz, Siu Ling Lim, Hitoshi Inokawa, Katsuki Kusakabe, Ryuichi Tomoshige
Summary: The study successfully synthesized a non-noble metal cobalt nanoparticle catalyst supported on layered double hydroxide, which showed efficient catalytic hydrolysis of sodium borohydride to produce hydrogen. The optimized size of cobalt nanoparticles enhanced catalytic activity, but the catalyst exhibited gradual decrease in activity during repeated tests.
ENVIRONMENTAL POLLUTION
(2021)
Article
Physics, Applied
Juan Mu, Yongqing Ye, Jiale Wang, Zhengwang Zhu, Yandong Wang, Haifeng Zhang
Summary: The ribbon catalyst made of high-entropy alloy shows excellent catalytic performance for the hydrolysis of NaBH4, with the exposure of Co and Ni atoms during acid solution corrosion contributing to the increased specific surface area and formation of vacancies and dislocations. This research paves the way for the application of macroscopic scale high-entropy alloy in the catalytic hydrogen field.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
A. Balciunaite, Z. Sukackiene, K. Antanaviciute, J. Vaiciuniene, A. Naujokaitis, L. Tamasauskaite-Tamasiunaite, E. Norkus
Summary: Effective Co/Cu, CoB/Cu, and CoBM (M = Mo,Zn,Fe)/Cu catalysts were prepared on the copper surface using a simple electroless deposition method. These catalysts showed catalytic activity for hydrogen generation from an alkaline sodium borohydride solution. The CoBMo/Cu catalyst exhibited the lowest activation energy and highest hydrogen generation rate, with excellent reusability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Merve Altinsoy, Ayhan Abdullah Ceyhan
Summary: In this study, a cobalt-doped catalyst was prepared from chicken eggshell powder for the hydrolysis of sodium borohydride. The effects of various parameters on the hydrolysis process were examined. The prepared catalyst showed a high hydrogen generation rate and good reusability, making it advantageous for use in sodium borohydride hydrolysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Polymer Science
Ahmed Abutaleb, Ibrahim M. Maafa, Nasser Zouli, Ayman Yousef, M. M. El-Halwany
Summary: Metallic Co NPs@poly(vinylidene fluoride-co- hexafluoropropylene) nanofibers (PVFH NFs) were synthesized through electrospinning and in situ reduction of Co2+ ions onto PVFH membrane. Physiochemical techniques confirmed the formation of metallic Co@PVFH NFs. The formulation with 40 wt% Co showed the highest catalytic activity in dehydrogenation of sodium borohydride (SBH), producing 110 mL of H-2 in 19 min at 25 degrees C. The catalyst also exhibited outstanding stability after six cycles of hydrolysis.
Article
Chemistry, Physical
Shuyan Guan, Lulu An, Yumei Chen, Mingbin Li, Jianchao Shi, Xianyun Liu, Yanping Fan, Baojun Li, Baozhong Liu
Summary: In this study, ultrathin carbon stabilized Co-doped CoxOy nanofilms (C-Co/CoxOy NFs) were successfully prepared using an ionic liquid/water interface strategy for hydrogen generation from NaBH4 hydrolysis. The 2D NF catalyst exhibited remarkable activity, with a hydrogen generation rate of 8055 mL.min(-1).g(Co)(-1) and could be recycled more than 20 times, surpassing most reported metal-based catalysts. The exceptional 2D Co-based NF structures with numerous active sites assisted in the activation of NaBH4 and water molecules, promoting hydrogen production effectively.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jifeng Deng, Kurbannisa Kadeer, Chaoyuan Hu, Zewei Xie, Yu Shi, Xiao Liu, Lei Xie, Jinrong Xu, Jie Zheng, Xingguo Li
Summary: In this study, a sponge catalyst for hydrogen generation from liquid hydrogen carriers was developed. The commercial melamine formaldehyde (MF) sponge was modified by grafting polyvinyl alcohol (PVA) through acid-catalyzed acetalization with formaldehyde. The resulting polyvinyl formal/MF (PVF/MF) composite sponge exhibited excellent characteristics as a catalyst, including high activity, high hydrogen storage density, easy catalyst recycling, and quasi-solid state behavior during H-2 generation, as demonstrated in the applications of NaBH4 solution and thermal dehydrogenation of perhydro N-ethylcarbazole.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Burcu Kiren, Nezihe Ayas
Summary: Hydrogen is expected to play a crucial role as an environmentally friendly and flexible energy carrier in future energy systems. This study investigates the effects of catalyst composition and reaction conditions on hydrogen yield in the hydrolysis of NaBH4, and identifies that a catalyst with 40 wt% Ni content exhibits the best performance under specific conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Jae Seon Koh, Do Hoon Kim, Se Hyeok Lee, Min Soo Kim
Summary: The aim of this study was to produce sufficient hydrogen for high-power fuel cell applications through acid-accelerated hydrolysis of sodium borohydride (SBH) with liquid water. The experimental results showed that the conversion of SBH was >= 95%, and a maximum of 6.71 wt% gravimetric hydrogen density was achieved. It was also found that the rate of hydrogen generation could be controlled through the feed injection rate, and the reactant temperature and excess stoichiometric number had significant effects on the hydrogen production.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Chemistry, Physical
Ibrahim Gozeten, Kadir Karakas, Yasar Karatas, Mehmet Tunc, Mehmet Gulcan
Summary: This study focuses on the production of hydrogen from sodium borohydride in a methanolysis environment using ruthenium nanoparticles impregnated on a halloysite support material. The newly synthesized nanocatalyst showed excellent activity and reusability in the catalytic methanolysis reaction. The material analysis confirmed the homogeneous distribution of ruthenium nanoparticles on the support material. Kinetic studies were conducted to calculate the kinetic parameters and determine the rate equation for hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
