Article
Engineering, Environmental
Lijun Zou, Xiaoying Zhu, Lun Lu, Yiliang Xu, Baoliang Chen
Summary: A magnetic nitrogen-doped porous carbon material (Co/CoOx@NC) was synthesized for peroxymonosulfate (PMS) activation, and the addition of reduced graphene oxide (rGO) significantly enhanced its catalytic performance. Co/CoOx@NC showed almost 100% removal efficiency for phenol in 10 minutes and demonstrated good reusability and recyclability, making it a promising candidate for practical applications. The PMS activation process in Co/CoOx@NC/PMS system was primarily mediated by efficient electron transfer through the carbon and nitrogen network, showing specific selectivity towards electron-donating organic compounds.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Jianping Yuan, Pan Yang, Liying Long, Haike Yang, Yiqun Chen, Zizheng Liu, Qing Shao, Feng Wu, Pengchao Xie, Jun Ma
Summary: In this study, a nitrogen-doped reduced graphene oxide material was synthesized and used as a catalyst for the removal of As(III) in water. The pH and dissolved oxygen of the solution were found to be the key factors affecting the removal efficiency. Density functional theory calculations showed that sulfite activation occurred more likely on C atoms adjacent to the N dopant, and the generated hydroxyl radical played a vital role in As(III) oxidation. The conversion of pyridinic nitrogen to pyrrolic nitrogen was responsible for the poor long-term stability of the catalyst.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Heresh Rayej, Mohammad Reza Vaezi, Behzad Aghabarari, Ramiro Ruiz-Rosas, Juana M. Rosas, Jose Rodriguez-Mirasol, Tomas Cordero
Summary: This work demonstrates the preparation of oxygen reduction reaction catalysts by pyrolysis of amino acid functionalized graphene oxide, with Histidine showing promising results in enhancing capacitance, conductivity, and ORR activity.
Article
Environmental Sciences
Yujie Feng, Wen Li, Jingkun An, Qian Zhao, Xin Wang, Jia Liu, Weihua He, Nan Li
Summary: This review focuses on the potential of carbon-based materials, particularly graphene and its derivatives, as noble-metal-free catalysts for the two-electron pathway of oxygen reduction reaction (ORR) to produce hydrogen peroxide (H2O2) in electrochemical systems. It discusses the functions of graphene family in accelerating electron transfer and increasing oxygen transfer for cathodes, aiming to reveal the enhancement mechanisms for H2O2 production. The challenges and prospects for the future use of graphene family as catalysts for H2O2 production are also proposed in this review.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Cao Yang, Yanmei Zhu, Jueqin Chen, Tian Wu, Jian Wang, Xiufang Zhao, Wei Sun, Hui Lin, Sihao Lv
Summary: In this study, tetracycline hydrochloride (TCH)-saturated MOF adsorbent was converted into an efficient catalyst for antibiotic degradation. The carbon matrix and doped nitrogen were found to play a crucial role in the degradation process.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Yahao Li, Changzhi Ai, Shengjue Deng, Yadong Wang, Xili Tong, Xiuli Wang, Xinhui Xia, Jiangping Tu
Summary: The study introduces a strategy to synthesize nitrogen doped vertical graphene (N-VG) array for catalyzing hydrogen evolution reaction (HER) in acidic electrolyte, demonstrating enhanced HER performance due to the introduction of N heteroatom leading to increased surface area and optimized electronic structure. Additionally, two possible enhancement mechanisms of N-VG are revealed with first-principle calculations, confirming the effectiveness of N doping in improving HER performance.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Shengjiong Yang, Shengshuo Xu, Jiayao Tong, Dahu Ding, Gen Wang, Rongzhi Chen, Pengkang Jin, Xiaochang C. Wang
Summary: The study uncovered the role of nitrogen dopant in carbon catalysts, where nitrogen is partially evaporated at high temperature to form topological intrinsic defects, promoting the activation of peroxymonosulfate and organic degradation through an electron-transfer mechanism. The findings suggest that surface-activated PMS complex is the main reactive oxidation species for organic degradation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Nanoscience & Nanotechnology
Zijian Gao, Zhuo Chen, Xinxing Zhan, Lingyun Zhou, Yadian Xie, Xiaohua Yang, Juan Tian, Gaixia Zhang, Shuhui Sun, Xin Tong
Summary: A simple method was used to synthesize platinum nanoparticles supported on nitrogen and iron-doped holey graphene, which can potentially facilitate the commercialization of fuel cells by improving their electrochemical performance.
ACS APPLIED NANO MATERIALS
(2023)
Article
Electrochemistry
Da-Je Hsu, Yu-Wen Chi, Kun-Ping Huang, Chi-Chang Hu
Summary: In this study, nitrogen-doped graphene nanowalls (N-GNWs) were prepared using CH4, C2H4, and C2H2 as carbon sources mixed with Ar and NH3 via plasma-enhanced chemical vapor deposition. The introduction of NH3 significantly improved the adhesion of N-GNWs on Ti substrates. After electrochemical activation, N-GNW-C2H2 exhibited the highest specific capacitance, making it a suitable material for the negative electrode of a high-voltage, asymmetric supercapacitor in organic electrolytes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Weiyin Chen, Chang Ge, John Tianci Li, Jacob L. Beckham, Zhe Yuan, Kevin M. Wyss, Paul A. Advincula, Lucas Eddy, Carter Kittrell, Jinhang Chen, Duy Xuan Luong, Robert A. Carter, James M. Tour
Summary: Heteroatom doping can modify the properties of two-dimensional materials, and the direct synthesis of heteroatom-doped graphene through flash Joule heating (FJH) shows promise for high-quality and low-cost production.
Article
Chemistry, Physical
Sara Fiori, Daniele Perilli, Mirco Panighel, Cinzia Cepek, Aldo Ugolotti, Alessandro Sala, Hongsheng Liu, Giovanni Comelli, Cristiana Di Valentin, Cristina Africh
Summary: High-quality nitrogen-doped graphene on nickel was prepared by utilizing both the catalytic properties of nickel and the solubility of nitrogen atoms. The experimental results demonstrated the growth of a flat, wide, continuous nitrogen-doped graphene layer, showing potential for various applications.
Article
Energy & Fuels
Hailong Shen, Xiaochun Wei, Zhenqi Cen, Dan Lu, Man Cai, Haifu Huang, Zhiqiang Lan, Xianqing Liang, Wenzheng Zhou
Summary: This study demonstrates the successful synthesis of nitrogen-doped graphene through UV light radiation and thermal decomposition of ammonium bicarbonate. The nitrogen-doped graphene exhibits high specific capacitance, good rate performance, and cycle stability in the form of spherical nanoparticles.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Biophysics
Zahra Kamal, Mohadeseh Zarei Ghobadi, Seyed Majid Mohseni, Hedayatollah Ghourchian
Summary: The study introduces novel iron porphyrin bio-mimicked graphene quantum dots (Fe-N-GQDs) as a paramagnetic and fluorescent label with exceptional optical properties. The Fe-N-GQDs with well-dispersed particles of about 2.5 nm diameter were prepared through solvothermal treatment of Fe-N doped graphene sheets. Bioconjugated Fe-N-GQDs serve as donors in a prominent fluorescence resonance energy transfer system, showing enhanced photoluminescence quantum yield and strong paramagnetic behavior.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Chemistry, Physical
Aya Hamed, Amr Hessein, Ahmed Abd El-Moneim
Summary: A novel fabrication approach using a CO2 Laser system to achieve real-time doping, reduction, and patterning of graphene oxide-based films has been proposed in this study. Different types of planar supercapacitors were readily fabricated with high nitrogen and sulfur content in the graphene framework, leading to excellent electrochemical performance. The versatility of the proposed approach was demonstrated by achieving higher energy density, power density, and retention rate in flexible graphene-based electrochemical storage devices.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Chemical
Armando Ramos-Corona, Ricardo Rangel, Javier Lara-Romero, Antonio Ramos-Carrazco
Summary: This work focuses on the development of ZnO compounds doped with nitrogen using a novel plasma methodology and supported on graphene oxide sheets for efficient photodegradation of lignin. The synthesis of ZnO was carried out using a hydrothermal method with microwave heating. Characterization techniques including UV-vis, Raman, and X-ray photoelectron spectroscopies were used to investigate the photocatalytic behavior of the materials. Morphological and structural characterization was performed using SEM and XRD. Degradation tests under visible and ultraviolet radiation energy showed a lignin degradation rate of approximately 90% in both cases. The results demonstrate the beneficial effect of nitrogen doping on the photocatalytic performance of ZnO.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Young H. Lee, Ian D. Gates
Summary: The instability at the interface between two parallel immiscible liquids flowing through a uniform planar pore is studied using linear stability analysis, with a focus on the ratio of gravity to interfacial tension determining the instability conditions. Application to steam condensate and bitumen flow shows instability is possible within a specific temperature range and could contribute to emulsion formation.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Marwa Hannouf, Getachew Assefa, Ian Gates
Summary: This article analyzes the greenhouse gas performance of steam-assisted gravity drainage (SAGD) operations in Alberta, Canada over the past 20 years, taking into account factors that affect technology deployment. The results show a reduction of 1.4-24% in SAGD's greenhouse gas intensity over the past 12 years. Improvements primarily stem from incremental changes driven by technical, environmental, socio-economic, and policy factors. According to predictions, with similar industry behavior, the anticipated reduction in greenhouse gas intensity by 2030 will range from 6.5-40%.
Article
Chemistry, Physical
Xiaoshuo Liu, Rui Wang, Tianfang Huang, Xinze Geng, Yifan Xu, Cong Chen, Chongchong Wu, Xunlei Ding, Yufeng Duan
Summary: In this study, six different carbon-based magnetic adsorbents were designed and it was found that the FeN3 on single-vacancy defective penta-graphene (Fe/SVN123) showed the highest adsorption ability for Hg-0. The presence of chemical bonding between Hg-0 and the adsorbents was confirmed through electron density difference and density of states analysis, and non-bonding interactions were also found to contribute significantly to the adsorption strength. The temperature was found to inhibit Hg-0 adsorption, and Hg-0 desorbed from Fe/SVN123 at around 520K, allowing for the regeneration of the adsorbent.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Weichao Chou, Dong Liu, Weizhen Li, Xin Chou, Hua Liu, Chongchong Wu, Peng Wu, Zhuowu Men, Zhiheng Li
Summary: This article proposes an efficient catalyst that combines highly dispersed platinum nanoparticles on ceria doped with chromium, achieving nearly complete conversion of raw woody biomass. The catalyst exhibits excellent conversion performance and good dispersion in ethanol.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Xu Han, Chongchong Wu, Jilin Wang, Yue Zhang, Kailai Zhang, Ian D. Gates, Hui Li, Zi-Hang Huang, Tianyi Ma
Summary: This study addresses the commercial application issues of aqueous supercapacitors and proposes a strategy to improve their energy storage performance by synthesizing VOx materials with oxygen vacancy. The modular pouch device based on this materia demonstrated high-energy density and durability, making it a promising standby power supply for 3C products.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Chang Liu, Zixun Yu, Fangxin She, Jiaxiang Chen, Fangzhou Liu, Jiangtao Qu, Julie M. Cairney, Chongchong Wu, Kailong Liu, Weijie Yang, Huiling Zheng, Yuan Chen, Hao Li, Li Wei
Summary: By constructing heterogeneous molecular catalysts using cobalt porphyrins and carbon nanotubes, the catalytic properties and activity were successfully modulated, resulting in sustainable production of hydrogen peroxide with high selectivity and activity.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Review
Chemistry, Physical
Qing Wu, Chongchong Wu
Summary: CO2 accumulation is a serious environmental concern, and investigating CO2 transformation techniques is necessary. Single-atom catalysts (SACs) have emerged as attractive catalysts for CO2 conversion due to their high catalytic activities and selectivities. This review paper summarizes the synthesis methods of SACs and discusses their mechanisms in CO2 electrocatalysis, photocatalysis, and thermo-catalysis.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Zhijian Liu, Jihao Wei, Guikai Zhang, Dewang Zhang, Jing Zhang, Weijie Yang, Chongchong Wu, Ian D. Gates
Summary: For human safety, efficient removal of formaldehyde in indoor environments is crucial. A metal-organic framework-based single-atom iron catalyst (Fe-SA) is proposed as a potential catalyst for formaldehyde oxidation. Through density functional theory (DFT) calculation, the adsorption characteristic and reaction path of Fe-SA with different coordination environments were explored. Fe-SA with 5-nitrogen coordination (Fe-SA-N-5-C) was selected and tested, showing a formaldehyde removal efficiency of 85.8% at 25 degrees C and 75% relative humidity, surpassing current data. Moisture was found to enhance catalytic oxidation of formaldehyde, indicating the practical applicability and stability of Fe-SA-N-5-C.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Engineering, Chemical
Liquan Jing, Meng Xie, Yuanguo Xu, Chun Tong, Yanhua Song, Xia Du, Heng Zhao, Na Zhong, Huamin Li, Ian D. Gates, Jinguan Hu
Summary: A three-dimensional carbon nitride co-modified with oxygen doping and nitrogen vacancies was synthesized through hydrothermal and thermal polymerization reactions. The electronic structure of carbon and nitrogen was confirmed using solid-state nuclear magnetism and electron loss energy spectroscopy. The modified carbon nitride exhibited enhanced photocatalytic activity for the degradation of organic pollutants and hydrogen production through selective oxidation of biomass.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Tareq Al-Attas, M. A. Khan, Tiago J. Goncalves, Nael G. Yasri, Soumyabrata Roy, Ali Shayesteh Zeraati, Pawan Kumar, Kristen A. Miller, Pulickel M. Ajayan, Ian D. Gates, Jinguang Hu, Venkataraman Thangadurai, Samira Siahrostami, Md Golam Kibria
Summary: Selective partial electrooxidation of methane to liquid oxygenates has been achieved with a copper-iron-nickel catalyst through a peroxide-assisted pathway. The catalysts' roles were confirmed through electrochemical, in situ, and theoretical studies. Nickel catalyst promoted the oxidation of H2O2 to produce active oxygen species, leading to the formation of iron (IV). The iron (IV)-oxo species reduced the activation energy barrier for CH4 deprotonation, while copper played a crucial role in suppressing overoxidation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Pachari Detpunyawat, Jingyi Wang, Yi Su, Ian Gates
Summary: In typical SAGD operations, a large pore volume is left after commercial operations, which can be used for storage. One option that has not been examined is hydrogen storage in post-SAGD depletion chambers. The research shows that hundreds of tonnes of hydrogen can be stored in these chambers, and the purity of the produced hydrogen can be improved with increased hydrogen storage capacity.
Article
Energy & Fuels
Jingyi Wang, Ian D. Gates
Summary: In the SAGD process, steam is injected into the reservoir to extract bitumen, and the thermal energy injected creates a potential geothermal system. This research evaluates the stored energy in the reservoir and explores methods for recovering it. The results show that a significant amount of energy remains in the reservoir rock even after the SAGD operation, and recovery methods, such as adding a new well, can yield high-temperature water for an extended period.
Article
Mechanics
Young H. Lee, Jingyi Wang, Ian D. Gates
Summary: We conducted experimental study on the effects of normal stress differences in the immiscible radial viscous fingering instability in a Hele-Shaw cell. The results showed that the effects were nonmonotonic and opposing, depending on the molecular weight of the displaced fluid and the stage of the fingering evolution. Decreases in molecular weight reduced the number of fingers and widened the finger width in the early stage, while increases in molecular weight promoted tip splitting and narrowed finger width in the early stage but suppressed tip splitting in the intermediate stage.
Article
Environmental Sciences
Ran Luo, Jingyi Wang, Ian Gates
Summary: Although methane emissions have decreased, monitoring using CEMS is expensive. PEMS, powered by machine learning, can be an alternative or supplement. The performance of different neural network models for methane prediction was compared, and the study found that more training data did not necessarily result in significantly better models.
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Haojie Li, Bingke Yang, Zhen Yao, Xuetao Wang, Kaiming Shen, Mengjie Liu
Summary: This study systematically investigates the influence of metal and nonmetal element doping on the photochemical properties of g-C3N4 for efficient catalytic AB hydrogen production. It provides a design method for high performance bifunctional catalysts of photocatalysis and metal catalysis. The results show that both non-metals (B, P) and metals (Ru, Ni) have efficient regulatory effects on the band structure of g-C3N4, resulting in a reduced band gap and improved hydrogen production. The study offers a theoretical method for the coupling of metal catalysis/photocatalysis ammonia borane to produce hydrogen.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Shrouq Mujahed, Davide Gandolfo, Luigi Vaccaro, Evgueni Kirillov, Dmitri Gelman
Summary: In this study, a high-valent Ru(IV) bifunctional catalyst was successfully applied for the hydrosilylation of various functional groups. The high-valent hydride complexes showed high chemoselectivity and affinity towards reducing polar bonds. The scope, limitations, and plausible mechanism of the reaction were described.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Yongzhen Peng, Kongchen Xia, Qi Wu
Summary: In this study, we report an engineered cyclohexanone monooxygenase that can be used for the asymmetric synthesis of chiral alpha-deuterated carbonyl compounds via enantioselective reductive dehalogenation. The engineered enzyme exhibits good chemoselectivity, stereoselectivity, and d-incorporation, making it a promising method for the synthesis of deuterated drugs.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Qi Yang, Ruixuan Xu, Hongqi Nie, Qilong Yan, Jun Liu, Jiuyu Chen, Yunlan Sun
Summary: The adsorption and decomposition processes of ammonium perchlorate (AP) on pure-Al and Al2O3/Al surfaces were investigated using density functional theory. The results showed that the pure-Al surface is more conducive to the decomposition of AP and the activation of NH3, while the Al2O3/Al surface promotes the disengagement of H and NH3 decomposition.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Yudong Hu, Guochao Xu, Ye Ni
Summary: This study identified a novel phenylalanine dehydrogenase (QtPDH) with high catalytic efficiency and thermal stability, making it a promising biocatalyst for industrial production of bulky aromatic primary amines. QtPDH exhibited a broader substrate specificity and significantly longer half-life compared to BbPDH.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Weiling Zhao, Zhiling Huang, Hui Shen, Xianglong Li, Shaofen Zhao, Bo Xie, Shengjie Xia
Summary: This study investigated the effects of metal doping and crystal plane selection on the CO2 adsorption properties of MgO using density functional theory (DFT) methods. The results showed that the appropriate crystal plane and metal doping can improve the adsorption properties of MgO on CO2. The influence of different crystal planes and metal dopants on CO2 adsorption properties varied significantly. The research provides some references for experimental studies on CO2 adsorption by MgO by combining the dual modification of crystal plane and doped metal.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Jie Zhang, Jinwei Chen, Zongbo Shi, Junyu Zhao, Runsheng Zhuo, Ruilin Wang
Summary: In this study, a double-layered silicalite-1 support with high specific surface area was synthesized, and a magnesium modification strategy was adopted to improve the catalytic activity and stability of the zinc-based catalyst. The modified catalyst showed enhanced propylene selectivity and anti-coking property.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Pei-Sen Gao, Chang-Wang Pan, Cheng Liu, Wen -Tong Chen
Summary: Asymmetric electrocatalysis offers a unique approach to obtain enantioenriched molecules that are difficult to obtain through conventional methods. This study developed a novel bifunctional electrocatalyst, enabling the oxidative kinetic resolution of chiral 1,4-diols and gamma-lactones. The work demonstrates the potential of bifunctional electrocatalysis for asymmetric synthetic methods and its importance in the development of novel electrocatalytic methods.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Qinzhe Lin, Xuanjin Lv, Xianming Zeng, Mengning Zhong, Qiyun Wu, Huilin Ren, Shenpeng Xu, Wentian Chen, Wenting Du, Jun Li
Summary: The catalytic efficiency of engineered IRED M5 was found to be relatively low when tasked with a bulky amine substrate. Rational design led to the mutants M203V and F260A, with F260A exhibiting a substantial improvement in conversion and stereoselectivity. The study revealed the potential molecular mechanisms underlying the effect of F260A and M203V on catalytic performance.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Zhishuai Wang, Fengyun Su, Hailong Cao, Mengzhen Tian, Xiang Li, Haiquan Xie, Xiaoli Jin, Zhengdao Li, Xin Ying Kong
Summary: In this study, the efficiency of photocatalytic CO2 reduction was significantly enhanced by incorporating nickel oxide onto niobium pentoxide. The resulting catalyst showed remarkable methane and carbon monoxide production improvements.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
A. Yu. Sidorenko, Yu. M. Kurban, T. V. Khalimonyuk, I. V. Il'ina, N. S. Li-Zhulanov, O. S. Patrusheva, V. V. Goltsova, M. P. Bei, Zh. V. Ihnatovich, J. Warna, K. P. Volcho, N. F. Salakhutdinov, D. Yu. Murzin, V. E. Agabekov
Summary: This study provides a comprehensive investigation into the catalytic condensation of renewable 3-carene with formaldehyde for the one-step preparation of terpenoid trans-4-hydroxymethyl-2-carene. Various acids and alumino-silicates were found to catalyze the reaction, but the selectivity to the desired product was limited. Phosphoric acid showed the highest selectivity, and an excess of formaldehyde or catalyst loading significantly increased the yield of the target product. Water presence also led to increased selectivity. Additionally, a detailed mechanism for the 3-carene condensation with formaldehyde was proposed and confirmed through kinetic modeling.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Meng-Yu Rong, Jing Nie, Shen Li, Jun-An Ma
Summary: We synthesized a new class of chiral quaternary ammonium salts and used them as catalysts in phase-transfer catalytic asymmetric alkylation. By employing these catalysts, we obtained a series of chiral fluorinated aromatic alpha-amino acid derivatives with high yields and enantioselectivities.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Zhaozhou Wei, Guangtao Wei, Huixian Che, Deyuan Xiong, Linye Zhang, Ruihua Xue, Yalin Tang, Xuanli Lu
Summary: This study demonstrates that small-sized graphite crystallite and highly defective carbon-based catalysts can increase the -SO3H density of the catalysts and modulate their surface electronic properties, leading to improved efficiency in the alpha-pinene hydration reaction. The reduction of graphite crystallite size is considered a critical step in enhancing the selectivity of alpha-terpineol.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Kempanna S. Kanakikodi, Nagendra Kulal, K. S. Subramanya, M. S. Puneethkumar, Bhavana B. Kulkarni, Ganapati Shanbhag, Sanjeev P. Maradur
Summary: An effective and highly selective protocol for synthesizing asymmetric organic carbonates using dimethyl carbonate (DMC) as a reactant and solvent has been developed. The performance of CeO2 nanostructures with different morphologies in the carbonate interchange reaction (CIR) of alcohols was investigated, and the CeO2 nano-catalyst with rod morphology exhibited the highest oxygen vacancy and remarkable enhancement in conversion. The CeO2 characterization data revealed that the exposed active sites, defect density, coordination state of surface atoms, and reducibility of the catalytic materials are the contributing factors to its high catalytic activity. CeO2 can be easily recovered and reused for multiple cycles.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Yanzhao Gao, Xianglei Meng, Shiqi Huang, Hui Wu, Liantao Jiang, Yu Zhou, Yuting Song, Yanyan Diao
Summary: Gamma alumina modified with alkaline earth metal shows improved catalytic performance for hydrogenation reactions. Pd catalysts supported by Al2O3 and Mg-modified Al2O3 were synthesized and their structure, composition, and surface acidity were investigated. The results showed that Pd/MgO-Al2O3-2 catalyst exhibited the best catalytic performance due to its metallic state palladium and weak acid sites.
MOLECULAR CATALYSIS
(2024)
