Article
Chemistry, Applied
O. Morelos-Santos, A. I. Reyes de la Torre, J. A. Melo-Banda, P. Schacht-Hernandez, B. Portales-Martinez, I. Soto-Escalante, M. Jose-Yacaman
Summary: We proposed a direct in situ synthesis method for iron oxide nanoparticles and evaluated their catalytic performance in heavy crude oil upgrading. Compared with the traditional thermal decomposition method, our method showed better physicochemical properties. The batch reactor evaluation results demonstrated that our method could effectively reduce the viscosity, API gravity, and heavy fractions of the oil even under hydrogen limited conditions, with a higher residue conversion rate.
Article
Energy & Fuels
Richard Djimasbe, Mikhail A. Varfolomeev, Ameen A. Al-Muntaser, Chengdong Yuan, Dmitriy A. Feoktistov, Muneer A. Suwaid, Alexey J. Kirgizov, Rustam R. Davletshin, Almaz L. Zinnatullin, Saar D. Fatou, Ranel Galeev, Ilfat Z. Rakhmatullin, Michael Kwofie, Vladimir V. Klochkov, Konstantin Yu Prochukhan
Summary: Using a nickel-based oil-dispersed catalyst can enhance the upgrading of heavy oil in supercritical water, increasing the yield of upgraded oil, reducing the yield of gases and coke, and improving the quality of the upgraded oil as well as reducing the pollution in the wastewater.
Article
Chemistry, Applied
Yu Dong, Qiuyang Zhao, Yantao Zhou, Lichen Zheng, Hui Jin, Baercheng Bawaa, Liejin Guo
Summary: Supercritical water is a promising method for upgrading heavy oil to produce light oil and gas. This study conducted experiments in a batch reactor to analyze the reaction pathways and the role of supercritical water in the upgrading process. The products were classified into gas, coke, and liquid products, which were further separated into saturates, aromatics, resins, and asphaltenes. A kinetic model was developed to explain the effects of supercritical water solubility on heavy oil upgrading, and it successfully fit the experimental data. The supercritical water upgrading process was divided into three stages: pre-induction primary cracking stage, post-induction primary cracking stage, and gas generation stage. This study provides a comprehensive understanding of the mechanism of heavy oil upgrading in supercritical water.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Jingtao Wei, Xiaodong Wang, Qiuye Li, Jianjun Yang
Summary: This paper reports the synthesis of rivet-like iron oxide nanoparticles for the first time using a one-pot hydrothermal method, which exhibited higher catalytic activity in upgrading Shengli-oilfield extra heavy crude oil. The nanoparticles consisted of a head part with an average size of 50 nm and a tail part with a diameter of 20-40 nm. Due to the site-rich surface of the catalyst and higher exposure of (104) facet, the viscosity of the heavy oil decreased significantly after reaction, making these nanoparticles promising for catalytic applications.
Article
Chemistry, Physical
Richard Djimasbe, Ildar R. Ilyasov, Michael Kwofie, Mohammed A. Khelkhal, Dmitrii A. Emelianov, Ameen A. Al-Muntaser, Muneer A. Suwaid, Mikhail A. Varfolomeev
Summary: The production of hydrogen from unconventional oil is an important area of research in the energy field, and this study focuses on synthesizing and applying promising catalysts based on nickel, cobalt, and nickel-cobalt alloys for hydrogen production from extra-heavy crude oil in the Tahe Oil Field in China. The results show that the presence of a catalyst, especially the Ni-CoAl2O3 catalyst, significantly increases the rate of hydrogen generation. Additionally, the use of supercritical water improves the yield and quality of upgraded oil.
Article
Materials Science, Multidisciplinary
Mohammed H. Mohammed, Saba A. Gheni, Khaleel I. Hamad, Awad E. Mohammed, Hassan M. Hmood, Marwan A. Mahomood, Hiba R. Mohammed, Zainab T. Abdulwahab, Safaa M. R. Ahmed, Ahmed A. Hassan
Summary: Upgrading unconventional heavy crude oil using supercritical water process catalyzed by biowaste catalysts can reduce sulfur content and molecular weight, improve API gravity and reduce viscosity of the upgraded petroleum light fraction, without the need for an external hydrogen source.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Energy & Fuels
Sergey A. Sitnov, Mohammed Amine Khelkhal, Irek I. Mukhamatdinov, Dmitriy A. Feoktistov, Alexey V. Vakhin
Summary: The importance of developing heavy oil reserves has been emphasized in the past decade due to the growing demand for energy resources. This study investigates the aquathermolysis of heavy oil in the presence and absence of iron oxide nanoparticles under hydrothermal conditions. The results indicate that the iron oxide nanoparticles exhibit high catalytic activity, resulting in decreased resin and asphaltene content, increased saturates content, decreased viscosity, and increased gas proportion in the extracted oil.
Article
Energy & Fuels
Sergey A. Sitnov, Mohammed Amine Khelkhal, Irek I. Mukhamatdinov, Dmitriy A. Feoktistov, Alexey V. Vakhin
Summary: According to the results of this study, the addition of iron oxide nanoparticles at higher temperatures can significantly promote the catalytic activity of aquathermolysis, reducing the content of resins and asphaltenes, and increasing the content of saturates, leading to a decrease in viscosity and an increase in gas proportion of the extracted oil. The data obtained at 250 degrees Celsius confirm the synergistic effect of iron oxide nanoparticles, which can facilitate the decomposition and conversion of heavy oil under hydrothermal conditions.
Article
Chemistry, Applied
O. Morelos-Santos, A. I. Reyes de la Torre, P. Schacht-Hernandez, B. Portales-Martinez, I. Soto-Escalante, A. M. Mendoza-Martinez, R. Mendoza-Cruz, J. Jesus Velazquez-Salazar, M. Jose-Yacaman
Summary: In this study, the effect of NiFe2O4 nanoparticles as catalysts in heavy crude oil upgrading under low hydrogen/feedstock ratio was investigated. The experiments showed that the nanoparticles significantly improved the efficiency of heavy oil upgrading.
Article
Engineering, Chemical
Ashwin Raghavan, Ping He, Ahmed F. Ghoniem
Summary: A two-phase stirred reactor model was developed for heavy oil upgrading in the presence of supercritical water, demonstrating the inference of oil and water phase kinetics parameters for a compact lumped reaction kinetics scheme. The study found that although supercritical water can suppress the formation of newer polynuclear aromatics (PNA) from distillate range species, it is broadly ineffective in deterring the combination of pre-existing PNA fragments in the oil feed.
Article
Engineering, Environmental
Young-Kwon Park, Jeong-Myeong Ha, Shinyoung Oh, Jechan Lee
Summary: The study reviews the transfer hydrogenation method to upgrade bio-oil, focusing on the major factors affecting the process. It concludes by identifying future challenges and the requirements to make the transfer hydrogenation upgrading process commercially available.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Rana Malhas, Jean H. El Achkar, Biltayib Misbah, Suad Al Radhwan
Summary: Maghemite nanoparticles of 3 nm and 15-20 nm have been used as adsorbents to successfully remove oil from oil-water emulsion. The adsorption capacity of the nanoparticles was 3280 mg/g and 3235 mg/g for 3 nm and 15-20 nm, respectively. The Langmuir isotherm model and pseudo-second-order kinetic adsorption model fit well with the experimental data. This innovative technique will reduce time and optimize the conventional treatment process.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Engineering, Chemical
Zujie Huang, Qiuyang Zhao, Lei Chen, Liejin Guo, Yan Miao, Yechun Wang, Hui Jin
Summary: The proposed technology of CO2- and N2-assisted supercritical water injection can enhance heavy oil recovery and improve oil quality.
CHEMICAL ENGINEERING SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Rasha Hosny, Ahmed Zahran, Ahmed Abotaleb, Mahmoud Ramzi, Mahmoud F. Mubarak, Mohamed A. Zayed, Abeer El Shahawy, Modather F. Hussein
Summary: Oil and gas industries could potentially benefit from nanotechnology, particularly in the field of chemical-enhanced oil recovery. Nanotechnology can be used to create more efficient and eco-friendly compounds for oil recovery, as well as improve the effectiveness of existing compounds. However, there are challenges that need to be overcome, such as the need for mass-producible and cost-effective nanomaterials, as well as evaluating the environmental impact. Despite these difficulties, nanotechnology-based oil recovery has substantial advantages and can make oil production more effective, profitable, and environmentally friendly.
Article
Energy & Fuels
Mohsen Bahaloo Horeh, Negahdar Hosseinpour, Aliyar Javadi
Summary: During oil production, asphaltenenanoaggregates self-associateand can precipitate out from the oil phase. Metaloxide nanoparticles coated with carbon-containing chains were synthesized to inhibit the precipitation of asphaltene. The inhibition mechanism and performance of the synthesized inhibitor were evaluated through conventional asphaltene dispersant test (ADT), interfacial tension (IFT) measurements, and interfacial elasticity analysis.
Article
Agricultural Engineering
Yuki Kawamata, Takuya Yoshikawa, Yoshihito Koyama, Hiroya Ishimaru, Satoru Ohtsuki, Eri Fumoto, Shinya Sato, Yuta Nakasaka, Takao Masuda
Summary: The biphasic organosolv treatment using water/1-butanol proved to be effective in removing hemicellulose and lignin simultaneously, enabling their recovery. This method was also found to be applicable for the separation and treatment of industrial agricultural waste.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Chemistry, Applied
David E. Scott, Mark D. Aloisio, Jose F. Rodriguez, Masato Morimoto, Robin J. Hamilton, Orain Brown, Rik R. Tykwinski, Jeffrey M. Stryker
Summary: This study found that catalytic iodine acts as a source of Bronsted acid in the presence of water, while generating iodonium ion and hydrogen peroxide to mediate the final oxidative aromatization step. Two independent catalytic cycles are driving the reaction, with complementary dual cycles working together to suppress side product formation and improve reaction efficiency.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Physical
Weican Wang, Koji Nakagawa, Takuya Yoshikawa, Takao Masuda, Eri Fumoto, Yoshihito Koyama, Teruoki Tago, Hiroyasu Fujitsuka
Summary: The Cu/C catalyst prepared for the selective hydrodeoxygenation of erythritol to butanediols showed high activity, selectivity, and sintering resistance. The highest butanediol yield was achieved at specific reaction conditions, mainly through the formation of 1,2,4-butanetriol.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Analytical
Marjan Razavian, Shohreh Fatemi
Summary: The study investigated the use of MOF catalysts in upgrading heavy fuel oil, enhancing catalytic performance through element doping for improved upgrading results. Mo-doped MAF-6 showed higher yields of light and middle distillates, increased asphaltene conversion, and greater viscosity reduction compared to thermal upgrading.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Energy & Fuels
Eri Fumoto, Shinya Sato, Yuki Kawamata, Yoshihito Koyama, Takuya Yoshikawa, Yuta Nakasaka, Teruoki Tago, Takao Masuda
Summary: FT-IR spectroscopy was used to examine the carbonyl functional groups in lignin-derived fractions. The absorption spectrum of carbonyl in these fractions was observed at 1707 cm(-1). The amount of carbonyl in the lignin-derived fraction was estimated using DMSO-d6 solutions of model carbonyl compounds analyzed by FT-IR, indicating that approximately 20% of oxygen in the fraction was from carbonyl functional groups.
Article
Chemistry, Physical
Fatemeh Nasr Azadani, Shohreh Fatemi, Narges Salehi Ardali
Summary: A kinetic model was proposed for the benzene alkylation with ethane reaction over PtH-ZSM-5 catalyst, which accurately predicted experimental data and optimized reaction conditions to improve ethylbenzene yield.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Energy & Fuels
Takeshi Morita, Masato Morimoto, Satoshi Shibuta, Hiroshi Imamura, Hideki Yamamoto, Rik R. Tykwinski, David E. Scott, Jeffrey M. Stryker, Teruo Suzuki, Ryuzo Tanaka
Summary: This study investigates the disaggregation behavior of asphaltene aggregate in solution using X-ray ultrasmall-, small-, and wide-angle scattering. The results show that the longer range structure of asphaltene aggregates collapses around 150 degrees C, but a further increase in temperature to 300 degrees C leads to a slight reversion to the aggregated state. This specific behavior in solution can be attributed to the transition of asphaltene from a solid to a melted state and the corresponding change in affinity indices of the Hansen solubility parameter at elevated temperatures.
Article
Engineering, Chemical
Mehraneh Fakheri, Shohreh Fatemi, Reza Rahimi Kakolaki
Summary: In this study, nitrogen-doped carbon quantum dots (N-CQDs), N-F codoped carbon quantum dots (CQDs), and N-S codoped CQDs were synthesized using three different methods, including electrochemical, solvothermal, and pyrolysis, with monoethanolamine and citric acid precursors. Ammonium fluoride and/or thiourea were used as the precursors for the second dopant. Factors affecting the synthesis parameters were examined to optimize the absorption edge and reduce the band gap in UV-visible spectroscopy. The best results were obtained with the pyrolysis method, which yielded N-F/CQDs with the highest absorption edge of 650 nm, a band gap of 1.91 eV, and a particle size of 24 +/- 7 nm. X-ray photoelectron spectroscopy (XPS) analysis confirmed the simultaneous doping of F and N atoms in the CQDs structure, and photoluminescence (PL) analysis revealed excitation-dependent properties suitable for optical sensor and solar cell applications.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Mehraneh Fakheri, Shohreh Fatemi
Summary: Nitrogen-fluorine codoped graphene quantum dots (N, F-GQDs) were synthesized through a one-pot hydrothermal method using glucose and ammonium fluoride (AF). The composition of nitrogen and fluorine with GQDs by AF was optimized to approach the highest light absorption edge in UV- visible spectroscopy and receive upconversion properties in photoluminescence (PL) analysis. The best cell with N, F-GQD0.07/TiO2/ FTO photoanode improved the efficiency, open circuit voltage, and short circuit current density, from 0.07 to 0.51, 370 to 699 mV, and 0.3 to 1.2 mA/cm2, respectively, compared to the cell fabricated by the blank TiO2/FTO photoanode.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Analytical
Shabnam Gharibi, Shohreh Fatemi, Farouk S. Mjalli, Rashid Al-Hajri
Summary: In this study, non-catalytic co-pyrolysis of petroleum vacuum residue (VR) and polypropylene (PP) was conducted in a batch condition under CO2 and/or steam atmospheres. Statistical analysis showed that CO2 + steam environment was more effective in reducing asphaltene formation and suppressing coke formation. The addition of PP improved the yield and quality of the liquid product and reduced the coke content. Optimum conditions for the pyrolysis reaction were determined, resulting in high maltene yield, reduction of asphaltene and coke, and improved quality of the upgraded oil. The pyrolysis of VR with PP in the CO2 + steam environment was considered an economically viable and environmentally friendly technique for transforming low-grade VR feedstocks to valuable liquid fuels without using catalysts.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Metallurgy & Metallurgical Engineering
Masato Morimoto, Sadayoshi Aizawa, Shohei Wada
Summary: This study investigated how rapid-heating and/or high-pressure conditions can improve the thermal fluidity of coal by using a synthetic compound as a model. The experiments showed that rapid heating overcame the compound's evaporation rate, while high pressure increased its boiling point and suppressed the pyrolysis reaction. These conditions allowed the compound to remain at high temperatures, thereby increasing the fluidity of coal and the yield of coke.
ISIJ INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Yuki Hata, Hideyuki Hayashizaki, Yoichi Matsuzaki, Masato Morimoto, Toshimasa Takanohashi, Takafumi Takahashi, Koji Kanehashi, Koyo Norinaga
Summary: This study constructed three-dimensional aggregated structural models of two types of coals and found that the density and Tg of the models were consistent with experimental values. The effects of temperature on the distribution of cohesive energy were quantitatively elucidated using these models. Differences in the molecular and cohesive structures of the coals led to variations in the distribution of van der Waals energy and electric energy at different temperatures.
ISIJ INTERNATIONAL
(2023)
Article
Chemistry, Physical
Faeze Sadat Hosseini, Shohreh Fatemi, Amideddin Nouralishahi
Summary: Mesoporous carbon-nitrogen doped ZnO powders were synthesized from ZIF-8 through thermal decomposition under nitrogen and air atmospheres. The prepared material exhibited significant photocatalytic activity for acetaldehyde degradation under visible light irradiation. The optical and morphological properties of the samples were characterized, and the results showed that the absorption edge of the prepared samples was shifted to the visible range. The photocatalytic activity of the samples was much higher than that of the bare ZIF-8 and commercial ZnO powder. The sample prepared by N2 thermal decomposition of ZIF-8 at 600 degrees C for 120 min, followed by air annealing at 450 degrees C for 90 min, achieved a removal rate of about 90% for acetaldehyde.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Energy & Fuels
Eri Fumoto, Shinya Sato, Masato Morimoto
Summary: Infrared spectroscopy can be used to estimate the average molecular structural parameters of heavy hydrocarbons, providing an alternative to conventional methods that require larger sample quantities and solubility.
JOURNAL OF THE JAPAN PETROLEUM INSTITUTE
(2023)
Article
Chemistry, Physical
Sanehiro Muromachi, Masato Kida, Masato Morimoto, Shogo Yamane, Satoshi Takeya
Summary: This paper investigates the manipulation of the structure and properties of semiclathrate hydrates. By adjusting the alkyl side chain length of quaternary ammonium salts, the structure and relevant properties of the hydrates can be modified.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)