Article
Chemistry, Physical
Faezeh Mirshafiee, Mehran Rezaei
Summary: In this study, cobalt nanocatalysts supported on Fe3O4@GO were synthesized and used to enhance hydrogen generation from the hydrolysis of sodium borohydride. The Co/Fe3O4@GO catalysts showed high catalytic activity, with a hydrogen generation rate of 4000 mL/min.gcat and good stability when loaded with 30 wt% cobalt. The Box-Behnken design under response surface methodology (RSM) was employed to investigate the effect of parameters on the hydrogen generation rate and identify the optimal reaction conditions. The Co/Fe3O4@GO catalyst exhibited a superior H2 generation rate of 6005 mL/min.gcat and low activation energy of 44.4 kJ/mol under the optimized conditions of temperature, catalyst loading, and NaBH4 concentration. The Co/Fe3O4@GO catalyst holds promise for NaBH4 hydrolysis due to its easy preparation and separation method, high hydrogen generation rate, and low activation energy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Neslihan Erat, Gamze Bozkurt, Abdulkadir Ozer
Summary: This paper presents the catalytic effect of Co doping on different oxide supports (single, bimetallic, and trimetallic) for the hydrolysis of NaBH4 aqueous solutions. The Co/CuO-NiO-Al2O3 catalyst shows high reaction activity at 25 degrees C and exhibits good reusability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Komal N. Patil, Divya Prasad, Bhagyashree, Vilas K. Manoorkar, Walid Nabgan, Bhari Mallanna Nagaraja, Arvind H. Jadhav
Summary: The FeCuCo tri-metallic oxide catalyst synthesized by a simple solution combustion method shows remarkable activity in generating hydrogen from NaBH4 hydrolysis, with high surface area, foam-like morphology and surface acidity. Factors affecting the hydrolysis reaction were studied in detail, and the catalyst demonstrated substantial recyclability performance without considerable loss in catalytic activity.
Article
Chemistry, Physical
A. Kytsya, V Berezovets, Yu Verbovytskyy, L. Bazylyak, V Kordan, I Zavaliy, V. A. Yartys
Summary: In this study, Ni-Co bimetallic nanoparticles were successfully synthesized, and the effects of different Ni contents on particle size and polydispersity were observed. Ni50Co50 showed the highest catalytic activity for the hydrolysis of alkaline NaBH4 solutions. The kinetic studies revealed that the hydrolysis rate increased with higher NaBH4 concentration and decreased with higher pH value of the solution. The activation energy of the reaction decreased with decreasing NaBH4 and catalyst contents.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Mengtian Shi, Yongjiang Hou, Xiaohan Du, Jie Guo, Bo Li, Yixuan Li
Summary: In this study, Co nanoparticles on graphene carriers were replaced with nickel atoms through Galvanic Replacement Reaction to form highly dispersed two-dimensional (2D)/2D Ni-Co nanolayers. The characterization analyses confirmed the ultrathin nanolayer structures of the catalysts and their good hydrogen generation performance, with a high rate and maintenance of activity after multiple cycles.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Valentina G. Minkina, Stanislav I. Shabunya, Vladimir I. Kalinin, Vladimir V. Martynenko
Summary: This study investigated the catalytic hydrolysis of aqueous NaBH4 solutions and found that the catalyst used showed stable catalytic activity. It was also observed that conducting the hydrolysis under near adiabatic conditions significantly reduced the hydrolysis time.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Ran Li, Fengming Zhang, Jiapeng Zhang, Hua Dong
Summary: A Co/HTNT catalyst is developed by immobilizing Co on the surface of titanate nanotubes. The microstructure and composition of the catalyst are investigated, confirming its excellent catalytic performance in NaBH4 hydrolysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Umit Ecer, Adem Zengin, Tekin Sahan
Summary: Proposing a novel catalyst, Co@P4VPGB@PMC, for catalytic hydrolysis of metal hydrides, the study investigates the effect of various parameters using response surface methodology (RSM). The synthesized catalyst is characterized using various techniques. The hydrogen generation rate is found to be 4499 mL/min gcat under specific conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Fang Li, Jia Li, Luyao Chen, Yanmei Dong, Pinhong Xie, Qiming Li
Summary: A stable and efficient supported CoB catalyst with excellent catalytic performance and cycling stability has been successfully developed for hydrogen production from NaBH4 hydrolysis. The as-prepared CoB/PANI composite catalyst exhibits high hydrogen production rate and low activation energy, showing great potential in practical applications.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Engineering, Chemical
Honghui Chen, Xue Wang, Di Zhang, Yifan Wu, Ke Zhang, Zhongqiu Cao, Shiwei Wu, Kezhen Qi, Yan Wang, Guode Li, Peng Yu
Summary: This study demonstrates the efficient hydrogen generation from NaBH4 hydrolysis using a noble-metal-free Co-Fe-B catalyst. By optimizing the pH value to 12.0, a filamentous catalyst structure is achieved, which increases the number of active sites and contact area. The ternary Co-Fe-B nanofilaments exhibit superior catalytic performance compared to binary Co-B and Fe-B materials.
DESALINATION AND WATER TREATMENT
(2022)
Article
Chemistry, Physical
Ashok D. Ugale, Neha P. Ghodke, Gil-Seon Kang, Ki-Bong Nam, Sudha Bhoraskar, Vikas L. Mathe, Ji Beom Yoo
Summary: This study synthesized carbon loaded cobalt oxide (C-Co3O4) for hydrogen generation via NaBH4 hydrolysis using the simple and economical process of combustion. The effects of NaBH4 concentration, pH, and temperature on hydrogen generation were investigated, revealing zero order reaction kinetics for C-Co3O4. A stable Hydrogen Generation Rate (HGR) was observed in the temperature range of 300-315 K, with a maximum HGR of 5430 ml min(-1) g(-1) at 320 K. The activation energy for NaBH4 hydrolysis using C-Co3O4 was calculated to be 55.9 kJ mol(-1).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yuxin Li, Guolang Zhou, Jingzhou Yin, Jianmei Chen, Chao Tang, Cheng Liu, Qiaoqi Li, Tianshi Wang, Feng Li, Chao Yao, Lili Zhang
Summary: This study successfully synthesized a series of catalysts with photo-thermal effect for hydrogen generation from sodium borohydride. Among them, Co6FeAl-LDH showed the best photo-thermal performance and activation energy reduction effect.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Okay Serkan Angi, Hatice Begum Murathan, Gulay Ozkan, Goksel Ozkan
Summary: This study investigates the hydrogen generation from catalytic hydrolysis of ethylenediamine bisborane solution catalyzed by nanostructured titanium dioxide supported Pd metallic catalyst. The results show that the loading of Pd and temperature have significant effects on the catalytic hydrogen production. Non-linear kinetic analysis is applied to determine the activation energy of the catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Lili Feng, Cong Wang, Jinrong Xu, Mingwei Fang, Yu Shi, Lei Xie, Jie Zheng, Xingguo Li
Summary: A novel strategy of constructing a polyol/water composite system was proposed to promote catalyst-free alcoholysis of NaBH4 while inhibiting the ionization of reaction products. Erythritol plays a key role in the reaction, with a conversion rate of 96% in 80 minutes, and effectively inhibits the alkalinity enhancement of the reaction system.
Article
Chemistry, Physical
Mehmet Salih Keskin, Mehmet Salih Agirtas
Summary: A new catalyst was designed and synthesized using chemical reduction and precipitation method, by impregnating the Co-Mo-B catalyst with different support materials. The catalytic activities were determined to be highest for the Co-Mo-B@TiO2 catalyst. The optimal conditions for sodium boron hydride hydrolysis were investigated, and it was found that the reaction time was shortened and the hydrogen production rate increased at temperatures of 30-50°C. Kinetic parameters and the activation energy were calculated.
