Article
Chemistry, Physical
M. Ibrahim, A. A. Jalil, W. F. W. Zakaria, N. A. A. Fatah, M. Y. S. Hamid, S. M. Izan, H. D. Setiabudi
Summary: The research indicated that increasing zirconium loading can enhance the Lewis acid sites of the catalyst, while excessive loading can reduce the amount of protonic acid sites, thus decreasing the catalytic performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Shen Hu, Jiaxuan Chen, Qunfeng Zhang, Junru Liu, Jinlin Meng, Guanghua Ye, Xinggui Zhou, Weikang Yuan
Summary: This study investigates the role of crystal-size-dependent surface barriers in zeolite catalysis using Pt/ZSM-5 as a model reaction system for n-pentane isomerization. The researchers reduce surface barriers on ZSM-5 crystals with different sizes through chemical liquid deposition of SiO2. They find that for the large ZSM-5 crystals, diffusion limitation is stronger and thus the effect of surface barriers on catalytic activity is more significant.
Article
Chemistry, Physical
Bianqin Zhang, Zhiwei Wu, Shuangfeng Xing, Jianyuan Zhang, Shichao Zhao, Mi Xiong, Jing Luo, Yong Qin, Zhe Gao
Summary: The rational synthesis of catalysts with controllable structures and the study of their structure-activity relationships to break the limitations of traditional catalysts remain challenging. The modification of silicalite-1 lacking suitable chemisorption sites using TDMASn was found to significantly increase Pt content and enhance catalytic activity. The understanding of the role of Sn as both a nucleation site for Pt and a promoter can guide the development of suitable catalysts for propane dehydrogenation processes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Shadi Najafi, Saeed Soltanali, Ali Hekmat Nazemi, Ali Abbasi
Summary: The study evaluated the crystalline structure of a Pt supported sulfated zirconia catalyst with different sulfuric acid ratios, and found that incorporating Fe and Cr by impregnation method increases surface area and acidity. However, loading Cr on the catalyst decreased its activity. Among the catalysts prepared, the one with Fe and Cr incorporated by impregnation method showed the best catalytic activity.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Nuni Widiarti, Hasliza Bahruji, Holilah Holilah, Yatim Lailun Ni'mah, Ratna Ediati, Eko Santoso, Aishah Abdul Jalil, Abdul Hamid, Didik Prasetyoko
Summary: Limestone was converted to high surface area CaO/MgO catalysts using the CHD method, and the addition of surfactant PEG improved the performance of the catalysts. Optimization studies resulted in the highest biodiesel yield, and impregnation with 5% NiO further enhanced the esterification functionality of the catalysts.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Review
Environmental Sciences
N. S. Hassan, A. A. Jalil, M. B. Bahari, N. F. Khusnun, E. M. Sharaf Aldeen, R. S. Mim, M. L. Firmansyah, Saravanan Rajendran, R. R. Mukti, R. Andika, H. Devianto
Summary: Biogas, composed of CO2/CH4 gas mixtures, is an alternative renewable fuel to natural gas. Zeolite and zeolite-based mixed matrix membrane (MMM) have shown promising potential in CO2/CH4 separation due to their thermal and chemical stability. Various modification methods have been employed to enhance the CO2/CH4 selectivity of zeolite-based MMM, with ionic liquid and silane methods showing the most significant improvements. Additionally, zeolite-based MMM has potential applications in water purification, biomedical fields, and gas separation.
Review
Environmental Sciences
Thuan Van Tran, A. A. Jalil, Duyen Thi Cam Nguyen, Mansur Alhassan, Walid Nabgan, Anh Ngoc T. Cao, Tung M. Nguyen, Dai-Viet N. Vo
Summary: Metal-organic framework material NH2-MIL-53(Al) with porous, flexible, and versatile structural properties is capable of detecting and removing various toxic pollutants. It exhibits efficient adsorption through multiple mechanisms and demonstrates high stability and recyclability.
ENVIRONMENTAL RESEARCH
(2023)
Article
Energy & Fuels
A. H. K. Owgi, A. A. Jalil, M. A. A. Aziz, W. Nabgan, N. S. Hassan, I. Hussain, M. Alhassan, M. A. A. Aziz, A. H. Hatta, M. Y. S. Hamid
Summary: Spherical mesoporous Ni/fibrous silica-alumina (Ni/FSA) catalysts with varied Ni loadings were synthesized and their catalytic performance was evaluated. The catalyst with 12.5 wt% Ni showed the highest efficiency and stability, and could inhibit coke deposition.
Article
Energy & Fuels
A. H. Hatta, A. A. Jalil, M. Y. S. Hamid, N. S. Hassan, I. Hussain, N. W. C. Jusoh
Summary: Aspherical nickel-loaded fibrous silica mesoporous ceria (Ni/FSCe) with a cockscomb-like structure has been synthesized and used for CO methanation. The Ni/FSCe showed significantly improved catalytic capability compared to conventional Ni-Ce/KCC-1. This can be attributed to the high amount of inter-nanoparticle oxygen vacancies, well-dispersed Ni, and better metal-support interactivity, which lead to better adsorption and inhibition of carbon deposition.
Article
Chemistry, Physical
M. B. Bahari, A. A. Jalil, C. R. Mamat, N. S. Hassan, N. F. Khusnun, A. R. Herrynaldi, A. F. A. Rahman, A. H. Hatta, M. A. H. Aziz, N. N. M. Huzaimi, M. H. Razak
Summary: Molybdenum trioxide doped on fibrous silica-titania (MoO3/FST) was synthesized and evaluated as a catalyst for the isomerization of C-5-C-7 for the first time. The structure and acid distribution of MoO3/FST were characterized through various analyses, revealing a moderate-to-strong distribution of Bronsted and Lewis acid sites. The addition of MoO3 led to intense metal-support interactions and increased Lewis acid sites. The isomerization tests showed high conversions for n-C-5, n-C-6, and n-C-7, with the highest yield achieved at 300 degrees C. The high activity of MoO3/FST was attributed to its interaction with silanol groups, resulting in the formation of protonic acid sites.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
R. H. Adnan, A. A. Jalil
Summary: Hydrogen peroxide (H2O2) is a widely used mild and green oxidant in various fields. However, its current production process is expensive and unsustainable. Photocatalysis using gold (Au) nanoparticles supported on semiconductor photocatalysts offers a promising and sustainable strategy for H2O2 generation. This article discusses the key developments and roles of Au nanoparticles in enhancing the photocatalytic H2O2 generation, as well as the factors influencing photocatalytic activity and the challenges and prospects for further development in sustainable H2O2 synthesis.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Environmental Sciences
Hassnain A. Yasir, Sharif H. Zein, Mathew C. Holliday, Khalaf J. Jabbar, Usama Ahmed, A. A. Jalil
Summary: This study simulated the adsorption of 2,4-dichlorophenol using activated carbon (AC), bagasse fly ash (BFA), and rice husk fly ash (RHFA) in a packed bed column using Aspen Adsorption software. The simulation effectively identified BFA as a potential low-cost alternative to AC for adsorption. Through optimization, BFA had a breakthrough time of 426 s, showing slightly weaker adsorption efficiency than AC but better cost effectiveness. The economic evaluation showed that using BFA and RHFA for wastewater treatment is more cost-effective than AC.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Energy & Fuels
A. H. K. Owgi, A. A. Jalil, M. A. A. Aziz, M. Alhassan, H. U. Hambali, W. Nabgan, R. Saravanan, A. H. Hatta
Summary: Methane dry reforming was studied with Ni/Fibrous Silica-Alumina catalysts promoted with Cs, Ce, Sr, and Sm. The catalysts were characterized using various analytical techniques. The addition of Cs improved the activity and reducibility of the catalyst, leading to a lower reduction temperature of NiO species and less carbon accumulation. Cs seemed to be the most effective promoter in preventing carbon formation and increasing catalyst durability.
Article
Chemistry, Physical
N. S. Hassan, A. A. Jalil, L. Y. Twu, N. A. A. Fatah, H. U. Hambali, I. Hussain, M. L. Firmansyah
Summary: In this study, fibrous silica (KCC-1) was impregnated with cobalt (Co), iron (Fe), and zinc (Zn) oxides for the hydroisomerization of n-hexane. The introduction of Co, Fe, and Zn altered the physicochemical properties of KCC-1 and increased the number of Lewis acid sites (LAS) and Bronsted acid sites (BAS). The formation of binuclear species of Zn as [ZnOZn]2} was confirmed, and Zn/KCC-1 exhibited the best catalytic performance due to the presence of [ZnOZn]2} as a new acidic center.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Engineering, Chemical
A. H. Hatta, A. A. Jalil, N. S. Hassan, M. Y. S. Hamid, W. Nabgan, M. Alhassan, M. B. Bahari, C. K. Cheng, S. H. Zein, M. L. Firmansyah
Summary: Energy demand is increasing rapidly, posing a great challenge due to the depletion of accessible energy sources. CO methanation plays a crucial role in producing substitute natural gas and requires a catalyst. Ceria, a widely used metal oxide with abundant oxygen vacancies, has not been extensively studied in Ni-based catalysts for CO methanation. Therefore, this article provides a bibliographic analysis and recent progress on the contribution of ceria in Ni-based catalysts for enhanced CO methanation.
Review
Chemistry, Multidisciplinary
A. H. Hatta, A. A. Jalil, N. S. Hassan, M. Y. S. Hamid, M. B. Bahari, M. A. Aziz, M. Alhassan, N. Ibrahim, N. W. C. Jusoh, N. H. H. Hairom
Summary: The rising global energy demand has led to increased interest in renewable energy, but natural gas remains a significant indigenous energy source. Creating substituted natural gas requires a catalyst, and understanding its deactivation and regeneration is crucial. This study provides comprehensive research on the catalyst's deactivation and regeneration in CO methanation, including its fundamentals, kinetics, and the effects of temperature, pressure, and feed ratio. The study also discusses the challenges and opportunities in CO methanation, particularly in the field of catalyst deactivation and regeneration.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Dina Kartika Maharani, Yuly Kusumawati, Widiya Nur Safitri, Reva Edra Nugraha, Holilah Holilah, Novia Amalia Sholeha, Aishah Abdul Jalil, Hasliza Bahruji, Didik Prasetyoko
Summary: Optimizing the hierarchical ZSM-5 structure by varying the first hydrothermal step at different times provides insight into the evolution of micro/mesopores and their effect as a catalyst for deoxygenation reaction. Monitoring the incorporation of tetrapropylammonium hydroxide (TPAOH) and N-cetyl-N,N,N-trimethylammonium bromide (CTAB) helps understand their role in pore formation. The optimized hierarchical ZSM-5, achieved through hydrothermal condensation at 3 hours, exhibits high acidity and micro/mesoporous synergy, resulting in 71.6% diesel hydrocarbon selectivity due to improved diffusion within the hierarchical structures.
Article
Chemistry, Multidisciplinary
Abdul Aziz, Berliana Gricelda Andini Putri, Didik Prasetyoko, Reva Edra Nugraha, Holilah Holilah, Hasliza Bahruji, Aishah Abdul Jalil, Suprapto Suprapto, Hartati Hartati, Nurul Asikin-Mijan
Summary: This study utilized saponin extract from Sapindus rarak as a natural template to synthesize mesoporous zeolite Y with improved surface area and mesoporosity. Impregnating different amounts of nickel on the zeolite further enhanced the deoxygenation reaction and increased the selectivity towards specific hydrocarbon compounds in the liquid product.
Article
Chemistry, Multidisciplinary
Eka Putra Ramdhani, Eko Santoso, Holilah Holilah, Reva Edra Nugraha, Hasliza Bahruji, Suprapto Suprapto, Aishah Abdul Jalil, Nurul Asikin-Mijan, Syafsir Akhlus, Didik Prasetyoko
Summary: Conversion of red mud into mesoporous Fe-aluminosilicate can produce selective catalysts for deoxygenation of waste cooking oil. The addition of citric acid during the conversion process changes the structure of the catalyst. Untreated red mud has a well-defined hexagonal mesoporosity, while treated red mud has lower regularity mesopores.
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)
