Article
Chemistry, Multidisciplinary
Wei Li, Zhipeng Zhao, Jianpeng Li, Yuan Liu, Beibei Gao, Xiaonan Li, Meng Zhang, Zhongyi Liu
Summary: The effect of Ni loading on the performance of Ni/SiO2 catalysts for the selective hydrogenation of biphenyl to cyclohexylbenzene was investigated in this article. Higher Ni loading led to overhydrogenation of biphenyl. In addition, the 25% Ni/SiO2 catalyst showed different performance characteristics compared to the 20% Ni/SiO2 catalyst.
Article
Chemistry, Physical
Qing Guo, Shaozhong Li, Jin Li, Yongke Hu, Yanxing Li
Summary: CO selective methanation is a reliable and efficient method for deep CO removal from H-2-rich reformate gases in proton exchange membrane fuel cell (PEMFC). The addition of SiO2 into Ni-ZrO2 catalysts increased the specific surface areas and dispersion of metallic Ni, leading to higher CO adsorption quantity and improved conversion at low temperature. SiO2 also weakened the surface basicity of the catalyst, decreasing CO2 adsorption strength and quantity, which inhibited CO2 methanation and resulted in higher selectivity for CO methanation.
Article
Energy & Fuels
Xiaohan Chen, Shafqat Ullah, Runping Ye, Chengkai Jin, Honglin Hu, Feiyang Hu, Yang Peng, Zhang-Hui Lu, Gang Feng, Li Zhou, Rongbin Zhang
Summary: A series of Zn-modified Ni/SiO2 catalysts with high surface area and high dispersity of active metals were synthesized using the ammonia evaporation method. The 80NiZn/SiO2 catalyst with an appropriate Ni/Zn molar ratio of 80:1 exhibited a high CO2 conversion rate of over 80% at 300 degrees C, good stability for 40 h at 310 degrees C, and a gas hourly space velocity of 18,000 mL center dot g-1 center dot h-1. The effect of the Zn promoter on the Ni/SiO2 catalyst for CO2 methanation was investigated, showing improved Ni dispersion and enhanced H2 adsorption. These findings demonstrate the broad availability, affordability, and remarkable high-performance practicability of the raw ingredients for the production of Ni-based catalysts for commercial applications.
Article
Chemistry, Physical
Yu Guo, Long Tian, Wangwei Yan, Ronghua Qi, Weixia Tu, Zhou-jun Wang
Summary: This study compared the effects of subsequent coating, co-impregnation, and sequential impregnation on the performance of CeO2-promoted Ni/SiO2 catalysts, finding that the CeO2@Ni/SiO2 catalyst prepared with the subsequent coating method exhibited the best initial activity and long-term stability. The catalyst featured small Ni size, intimate Ni-CeO2 contact, pronounced redox property, and strong surface basicity, leading to excellent reforming activity and exceptional coke resistance. The research sheds light on the impact of different introduction methods on catalyst structure, aiding in the design of robust nanocomposite catalysts with outstanding catalytic performance.
Article
Chemistry, Multidisciplinary
Shuai Cheng, Tao Meng, Dongsen Mao, Xiaoming Guo, Jun Yu, Zhen Ma
Summary: Ni-modified Ag/SiO2 catalysts exhibit enhanced catalytic activity and stability due to the improved dispersion of active Ag species and inhibition of Ag particle growth by the presence of Ni species.
Article
Energy & Fuels
Anna A. Salomatina, Ksenia A. Nadeina, Oleg V. V. Klimov, Irina G. Danilova, Evgeny Yu. Gerasimov, Igor P. Prosvirin, Vera P. Pakharukova, Yuriy A. Chesalov, Alexander S. Noskov
Summary: This study aimed to investigate the effect of NiMo/gamma-Al2O3 catalyst composition on its catalytic properties. The results showed that increasing the Ni/Mo molar ratio affected the formation of sulfide active component and decreased the interaction between active metals and the support. The excess nickel also contributed to the promotion of MoS2 particles and the formation of bulk nickel sulfide particles.
Article
Chemistry, Multidisciplinary
Jing Wang, Mei Zhang, Feng Li, Huan Wang, Yanguang Chen, Hua Song
Summary: By studying catalysts with different P/Ni ratios, the mechanism of P in hydrodeoxygenation reaction was revealed. P promotes the formation of smaller active sites and increases the acidity of acid sites. The selectivity of products can be optimized by adjusting the P content in Ni-P catalysts, leading to efficient hydrodeoxygenation catalysis.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Energy & Fuels
Run-Ping Ye, Lin Liao, Tomas Ramirez Reina, Jiaxu Liu, Durgaiah Chevella, Yonggang Jin, Maohong Fan, Jian Liu
Summary: The study introduces an improved sol-gel method for loading Ni-MOF onto a silica support to create a Ni/SiO2 catalyst. The catalyst demonstrates excellent catalytic performance under low temperature and high GHSV conditions, with high CO2 conversion and CH4 selectivity. This work provides a groundbreaking strategy for loading MOF derived catalysts and may offer insights for preparing highly dispersed Ni/SiO2 catalysts.
Article
Chemistry, Physical
Achraf Sadier, Dichao Shi, Anne-Sophie Mamede, Sebastien Paul, Eric Marceau, Robert Wojcieszak
Summary: The bimetallic Ni-Fe catalyst showed better activity and stability in the aqueous phase hydrogenation of xylose compared to the monometallic Ni catalyst. A temperature of 80 degrees Celsius was found to minimize nickel leaching.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Maria Alekseeva (Bykova), Yuliya K. Gulyaeva, Olga A. Bulavchenko, Andrey A. Saraev, Anna M. Kremneva, Sergey A. Stepanenko, Anton P. Koskin, Vasily V. Kaichev, Vadim A. Yakovlev
Summary: The addition of zinc hinders the reducibility of nickel and weakens its interaction with the silica matrix, leading to the formation of solid oxide nickel-zinc solutions. Zn-modified catalysts exhibit significantly better catalytic properties in the dehydrogenation of methylcyclohexane compared to Ni-Cu counterparts. The selectivity towards toluene formation increases noticeably with a decrease in the Ni : Zn mass ratio, attributed to the promoting geometric and electronic effects from the formation of bimetallic Ni-Zn solid solutions.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Ming Song, Liluo Shi, Xuena Xu, Xihua Du, Yan Chen, Wenchang Zhuang, Xumei Tao, Limei Sun, Yan Xu
Summary: This study investigates the effect of different promoters on the dispersion of Ni active sites and the catalytic performance of Ni catalysts in the hydrogenation of CO2. It is found that La and Ce promoters enhance the catalytic activity at low temperatures, while Mg promoter leads to reduced catalytic performance due to Ni particle agglomeration. The findings highlight the importance of Ni active sites and CO2 activation ability for efficient CO2 methanation at low temperatures.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Penghui Yan, Eric Kennedy, Michael Stockenhuber
Summary: Ni-Fe catalysts prepared by different impregnation techniques were studied for their activity in the hydrodeoxygenation of guaiacol and hydrogenation of toluene. The study found that the ratio of Ni/Fe significantly influences the hydrodeoxygenation activity, with a catalyst having a Ni/Fe mass ratio of 3.3 exhibiting the highest performance.
JOURNAL OF CATALYSIS
(2021)
Article
Engineering, Chemical
Jiachengjun Luo, Shaojia Song, Jing Li, Ning Qi, Baofang Jin, Yongxia Zhu, Yongjun Ji, Lei Shi, Jiajian Gao, Yazhuo Zhang, Zhenxing Li, Guangwen Xu, Fabing Su
Summary: By using the newly developed Ni-Ni3P/SiO2 catalyst, STC can be selectively produced in silicon hydrochlorination with a selectivity higher than 90% and a selectivity of less than 10% for TCS.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
Fatemeh Salahi, Fatemeh Zarei-Jelyani, Maryam Meshksar, Mohammad Farsi, Mohammad Reza Rahimpour
Summary: This study focuses on the application of Y-promoted Ni-based catalysts supported on bulk and hollow Al2O3 supports in the steam reforming of methane process. Various characterizing techniques were employed to analyze the catalysts. The 20Ni-3.0Y/HAl catalyst showed the highest methane conversion, hydrogen yield, and H2/CO molar ratio at 700 degrees C, possibly due to the larger surface area of the hollow alumina support compared to the bulk one.
Article
Chemistry, Physical
Brandon C. Vance, Pavel A. Kots, Cong Wang, Jack E. Granite, Dionisios G. Vlachos
Summary: In this study, we report the application of a new and inexpensive catalyst Ni/SiO2, which can convert polyethylene into valuable n-alkane products under mild conditions. We reveal a new mechanism of long-alkane hydrogenolysis and demonstrate that the catalyst can handle multiple plastics, broadening the scope of catalysts for polyolefin hydrogenolysis and unleashing the potential for managing plastic waste.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Kotyada Suryanarayana, Suresh Maddila, Kerru Nagaraju, Sreekantha B. Jonnalagadda
Summary: The evolution of Click chemistry led to the synthesis of a contemporary library of 1,2,3-triazole-thieno[2,3-d]-pyrimidine derivatives, which showed promising antioxidant activity. Structure-activity relationship analysis was used to explore the impact of substituents on the aryl ring on the activity.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Inorganic & Nuclear
Damilola C. Akintayo, Wisdom A. Munzeiwa, Sreekantha B. Jonnalagadda, Bernard Omondi
Summary: A series of N-(pyridinylmethyl)aniline Zn(II) carboxylate complexes were synthesized and characterized. The electronic properties of the carboxylate co-ligands significantly influenced the catalytic performance of the complexes, with mononuclear complexes generally being more active than dinuclear complexes.
Article
Chemistry, Inorganic & Nuclear
Damilola C. Akintayo, Wisdom A. Munzeiwa, Sreekantha B. Jonnalagadda, Bernard Omondi
Summary: Five copper(II) benzoate complexes were synthesized using N-donor Schiff base ligands and characterized. These complexes show different geometries and demonstrated catalytic activity in ring-opening polymerization of e-caprolactone, producing low molecular weight polymers.
TRANSITION METAL CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Ramakanth Pagadala, Venkatesan Kasi, Nhlanhla Gracious Shabalala, Sreekantha B. Jonnalagadda
Summary: This review focuses on the ultrasound-assisted multicomponent reactions for synthesizing varied nitrogen-, oxygen-, and sulfur-containing heterocyclic compounds using water as the solvent. The advantages and limitations with respect to yields and reaction conditions are discussed, covering literature reports from 2014 to date.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Nagaraju Kerru, Naresh Kumar Katari, Sreekantha B. Jonnalagadda
Summary: The utilization of small organic compounds as catalysts, known as organocatalysis, has emerged as a dominant technique in organic conversions. Researchers have focused on designing simpler organocatalysts to synthesize chiral molecules with high yields. This article highlights the impact of different types of organocatalysts in organic synthesis and emphasizes the crucial methods to construct valuable molecules with high enantiomeric purity.
PHYSICAL SCIENCES REVIEWS
(2022)
Review
Chemistry, Organic
Hari Babu Bollikolla, S. N. Murthy Boddapati, Swetha Thangamani, Baby Ramana Mutchu, Mohammed Mujahid Alam, Mohamed Hussien, Sreekantha Babu Jonnalagadda
Summary: This review article presents various synthetic strategies for the preparation of benzotriazole and its derivatives, and provides a brief overview of their bio applications and pharmacological activity.
JOURNAL OF HETEROCYCLIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Buri Apparao, Alice R. Robert, Muthyala Murali Krishna Kumar, Rama Krishna Madaka, Pamerla Muralidhar, Suresh Maddila, Sreekantha B. Jonnalagadda
Summary: This study describes a facile, eco-friendly, and efficient approach for the multicomponent synthesis of 2-amino-pyran analogues using rutheia-doped alumina as a heterogeneous catalyst. The key benefits of this protocol include operational simplicity, economy, green reaction conditions, and high product yields. Additionally, the catalyst material can be recycled and reused up to eight runs without any significant loss of catalytic activity.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Multidisciplinary Sciences
Siva Krishna Muchakayala, Naresh Kumar Katari, Kalyan Kumar Saripella, Henele Schaaf, Vishnu Murthy Marisetti, Leela Prasad Kowtharapu, Sreekantha Babu Jonnalagadda
Summary: We report an ideal method for quantifying impurities in mycophenolate mofetil drug substances and their oral suspension preparations, utilizing quality by design (QbD) and green chemistry principles. The method conditions were optimized using a systematic central composite design, resulting in the best possible separation between critical pairs. The developed method was validated according to ICH and USP guidelines, showing specificity, recovery, linearity, and precision within acceptable ranges. The eco-friendliness and greenness of the method were also evaluated and found to be green.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Siddaramagoud Bandalla, Vijaykumar Dosarapu, Ganesh Babu Bathula, Madhu Ravula, Jyothi Yadagiri, Parikshit Gogoi, Mallesham Baithy, Sreekantha B. Jonnalagadda, Chandra Shekar Vasam
Summary: An efficient and reusable heterogeneous catalyst for the production of cyclohexanone from cyclohexanol oxidation under solvent-free conditions was developed using inexpensive solid-base CaO-MgO binary metal oxides. Through various characterization techniques, the 1CaO-1.5MgO catalyst showed higher conversion and superior selectivity.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Divya Kumar Vemuri, Parameswari Akshinthala, Naresh Konduru, Leela Prasad Kowtharapu, Naresh Kumar Katari, Sreekantha Babu Jonnalagadda, Rambabu Gundla
Summary: A stability-indicating method was developed and validated for detecting degradation impurities in Pibrentasvir, using QbD principles for optimization. The method showed high recovery rates, linearity, and precision, while also proving sensitivity to chemical stress conditions.
Article
Chemistry, Multidisciplinary
Leela Prasad Kowtharapu, Naresh Kumar Katari, Christian A. Sandoval, Naresh Konduru, Siva Krishna Muchakayala, Surya Prakash Rao Pydimarry, Sreekantha Babu Jonnalagadda
Summary: This study evaluates the qualitative and quantitative formulas for nasal spray and ophthalmic solution formulations of olopatadine HCl using classical and instrumental techniques. The study accurately quantifies the reverse engineering of olopatadine HCl nasal spray and ophthalmic solution formulations using HPLC, osmometry, and titration techniques. The results show that the methods used are linear, accurate, precise, and specific, with good recovery rates and low relative standard deviations.
Review
Chemistry, Multidisciplinary
Neha Agarwal, Vijendra Singh Solanki, Brijesh Pare, Neetu Singh, Sreekantha B. Jonnalagadda
Summary: Present times face various environmental, atmosphere, and energy-related issues. Efficient catalysts and eco-friendly materials are capable of solving these problems effectively. The development of nano-based advanced catalysis has created new opportunities, as nanocatalysts with their small size and larger surface area offer superior interfaces and expanded functionality, attracting global attention. Extensive research on nanomaterials' size and properties has shifted the paradigm towards using materials with superior activity and selectivity as catalysts. Affordable and eco-friendly nanocatalysis is becoming increasingly popular, hence the need to understand their remarkable properties and applications. This review focuses on explicit properties of nanocatalysts due to their size, structure, and their applications in reducing environmental issues.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2023)
Review
Chemistry, Physical
Thirupathi Damera, Ramakanth Pagadala, Surjyakanta Rana, Sreekantha Babu Jonnalagadda
Summary: Microwave energy has been fascinated as an alternative technique for the construction of heterocycles, with heterogeneous catalysts providing advantages in terms of recycling, catalyst preparation, and product yields. The usage of microwave energy has rapidly increased in various fields such as organic synthesis, peptide synthesis, polymer chemistry, material sciences, nanotechnology, and biological processes. This article covers the applications of microwave-assisted heterogeneous catalytic reactions in the construction of chromenes, pyridines, pyrroles, triazoles, pyrazoles, tetrazoles, trans and cis julolidines.
Article
Chemistry, Multidisciplinary
Panasa Mahesh, Parameswari Akshinthala, Naresh Kumar Katari, Lavleen Kumar Gupta, Dikshita Panwar, Manoj Kumar Sharma, Sreekantha Babu Jonnalagadda, Rambabu Gundla
Summary: In this study, two new series of 3,5-dimethyl-1H-pyrazole-4-sulfonamide and 1,3,5-trimethyl-1H-pyrazole-4-sulfonamide derivatives were designed and synthesized. These derivatives were characterized by various analytical techniques and their biological evaluation data were presented, paving the way for the development of new pyrazole-4-sulfonamide derivatives.
Article
Chemistry, Multidisciplinary
Ganeshbabu Bathula, Surjyakanta Rana, Siddaramagoud Bandalla, Vijaykumar Dosarapu, Satyanarayana Mavurapu, V. V. Aswathi Rajeevan, Bhaskar Sharma, Sreekantha B. Jonnalagadda, Mallesham Baithy, Chandra Shekar Vasam
Summary: This study demonstrates the high efficacy of WOx-promoted CeO2-SiO2 and CeO2-ZrO2 mixed oxide catalysts in the selective oxidation of benzyl alcohol to benzaldehyde. The WOx/CeO2-SiO2 catalyst, characterized by improved physicochemical properties and a higher number of oxygen vacancies, exhibited superior conversion and selectivity compared to other catalysts. Additionally, this catalyst showed excellent recyclability without significant activity loss.
