Article
Chemistry, Physical
Roman E. Yakovenko, Grigory B. Narochnyi, Ivan N. Zubkov, Ekaterina A. Bozhenko, Yash V. Kataria, Roman D. Svetogorov, Alexander P. Savost'yanov
Summary: This article presents a simple method for producing high-octane gasoline from CO and H-2 using a Co-Al2O3/SiO2/HZSM-5/Al2O3 hybrid catalyst. By adjusting the pressure and temperature, the content of branched hydrocarbons can be increased. The experimental batch of gasoline fraction produced under the optimized process parameters has an octane number of 78.5 units.
Article
Chemistry, Physical
Renjie Liu, Denis Leshchev, Eli Stavitski, Mitchell Juneau, Jane N. Agwara, Marc D. Porosoff
Summary: Research on utilizing CO2 as a C-1 feedstock for the synthesis of chemicals and fuels shows that the selectivity of catalysts is strongly linked to the Si/Al ratio and the method of introducing the K promoter.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Chunxiang Zhu, David P. Gamliel, Julia A. Valla, George M. Bollas
Summary: Fischer-Tropsch synthesis is explored as a one-step process for converting synthesis gas to hydrocarbons, with novel catalysts for in-situ upgrading of products synthesized and tested. The use of hierarchical ZSM-5 co-catalysts relaxes mass transfer limitations, improving conversion and selectivity. Loss of catalyst activity due to pore plugging is observed, but in-situ regeneration enables stability in FTS performance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Xin Li, Yao Chen, Shize Liu, Ning Zhao, Xiangning Jiang, Meng Su, Zhenhua Li
Summary: This study investigated the impact of the combination of Co-based catalysts and HZSM-5 on product distribution in Fischer-Tropsch synthesis. Results showed that proximity and reaction temperature significantly affected the selectivity, providing guidance for the rational design of bifunctional catalysts.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Deviana Deviana, Geun Bae Rhim, Young-eun Kim, Hyeon Song Lee, Gyoung Woo Lee, Min Hye Youn, Kwang Young Kim, Kee Young Koo, Jinwon Park, Dong Hyun Chun
Summary: The Fischer-Tropsch synthesis (FTS) was conducted using bifunctional model catalysts prepared by physically mixing precipitated iron-based FTS catalysts (P-Fe) and H-ZSM-5. The acidity of the model catalysts was adjusted by varying the ratio of P-Fe/H-ZSM-5 and the Si/Al ratio in H-ZSM-5. The physical mixing of H-ZSM-5 provided Br phi nsted acid sites (BAS) to the bifunctional catalysts without affecting the catalytic activity of P-Fe. The study revealed a linear correlation between the cracking rate and BAS concentration in the bifunctional FTS process for the first time.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Faen Song, Xiaojing Yong, Xuemei Wu, Wei Zhang, Qingxiang Ma, Tiejian Zhao, Minghui Tan, Zhongshan Guo, Heng Zhao, Guohui Yang, Noritatsu Tsubaki, Yisheng Tan
Summary: The capsule catalyst FeMn@HZSM-5 was shown to effectively reduce CO2 formation and increase olefins selectivity in Fischer-Tropsch to olefins (FTO) reaction, outperforming other physically mixing catalysts. The HZSM-5 shell played a key role in affecting H2O diffusion and suppressing the water-gas shift reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Ting Wang, Yuebing Xu, Yufeng Li, Lei Xin, Bing Liu, Feng Jiang, Xiaohao Liu
Summary: This study reports the use of Na-mediated bimetallic Fe-Ni catalyst simply mixed with HZSM-5 to enhance the stable and selective production of aromatics from syngas. The addition of Ni with Na substantially regulates iron carbide formation and suppresses carbon deposition, leading to increased selectivity to light alpha-olefins. The presence of Na weakens the Fe-Ni interaction, reduces electron transfer from Fe to Ni, and promotes the formation of lighter olefins, demonstrating the potential for developing stable and selective iron-based catalysts for the production of FT products.
Article
Energy & Fuels
Mingquan Li, Aqsa Noreen, Yajie Fu, Cederick Cyril Amoo, Yujia Jiang, Xu Sun, Peng Lu, Ruiqin Yang, Chuang Xing, Shurong Wang
Summary: The study focuses on the direct synthesis of higher olefins (C5+) from syngas using a novel Fe@Na-ZSM-5 composite catalyst, achieving a selectivity of 70% olefins in gasoline. The promotion by Na ions enhances the formation of Fe5C2 phases, facilitating C-C coupling and increasing gasoline and olefins selectivity. Na type zeolite (Na-Zeolite) serves as a unique Na electron promoter, contributing significantly to the development of heterogeneous catalysts and functional materials.
Article
Chemistry, Applied
Hong Du, Miao Jiang, Xiuyun Ma, Peifang Yan, Z. Conrad Zhang
Summary: The conversion of biomass into wax-free liquid fuels is an important industrial application, and the use of Mn-promoted catalyst can improve CO conversion rate and the efficiency of producing renewable energy.
Article
Chemistry, Physical
Yanbing Li, Yingluo He, Kensei Fujihara, Chengwei Wang, Xu Sun, Weizhe Gao, Xiaoyu Guo, Shuhei Yasuda, Guohui Yang, Noritatsu Tsubaki
Summary: In this study, a core-shell structured Na/Fe@Co bimetallic catalyst was developed to enhance CO2 conversion and selectivity of light hydrocarbons, while inhibiting CO selectivity. Characterization analyses revealed that the introduction of CoCo Prussian Blue Analog (CoCo PBA) increased the reducibility of iron oxide, accelerated the formation of iron carbide, and adjusted the surface basic properties of the catalyst. Additionally, trace Co atoms acted as a second active center in the CO2 Fischer-Tropsch synthesis process for increasing the synthesis of light hydrocarbons from CO hydrogenation. This work provides a novel core-shell structured bimetallic catalyst system for the production of light hydrocarbons, particularly light olefins, from CO2 hydrogenation.
Article
Chemistry, Physical
Evert Boymans, Tom Nijbacker, Dennis Slort, Sander Grootjes, Berend Vreugdenhil
Summary: This study investigates the potential of bifunctional catalysts based on hierarchical zeolites for the direct production of jet fuel. The results show that Co/H-(meso)ZSM-5 and Co/H-(meso)BETA catalysts exhibit high jet fuel yields and the desired branched/linear hydrocarbon ratio.
Article
Chemistry, Applied
Jia Ding, Xu Huang, Qilei Yang, Lizhuo Wang, Yue Peng, Junhua Li, Jun Huang
Summary: In this study, a series of Cu-ZSM-5/Al-fiber catalysts with different Si/Al molar ratios were synthesized and their performance in NH3-SCR reaction was studied. The higher Si/Al molar ratio catalysts showed superior NH3 adsorption capacity and enhanced NOx degradation activity. The microstructured Cu-ZSM-5 catalysts exhibited better NH3-SCR performance at moderate temperatures under higher gas hourly space velocity, indicating improved mass transfer properties.
Article
Chemistry, Physical
Hongtao Wang, Yushan Wu, Yanzhi Li, Jiebang Peng, Xiang-Kui Gu, Mingyue Ding
Summary: A simple and efficient method for the high-selective conversion of GVL into gasoline fuels over designed Cu/HZSM-5 bifunctional catalyst in a single fixed-bed reactor was reported. The interfacial sites composed of metallic Cu and proton acid of HZSM-5 played a key role in determining the performance by providing a spontaneous C-O bond breaking path of GVL.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Organic
O. P. Papeta, S. I. Sulima, V. G. Bakun, I. N. Zubkov, A. N. Saliev, R. E. Yakovenko
Summary: Catalysts synthesized from a composite mixture showed good activity and selectivity in the Fischer-Tropsch synthesis reaction. The content of zeolite component is critical to the catalyst's activity and selectivity, while the ratio between active components correlates with the composition and properties of the products.
PETROLEUM CHEMISTRY
(2023)
Article
Energy & Fuels
Wenli Lu, Jungang Wang, Zhongyi Ma, Congbiao Chen, Yan Liu, Bo Hou, Debao Li, Baojun Wang
Summary: The role of carbon deposits during Fischer-Tropsch synthesis (FTS) on cobalt catalysts is still debated. This study investigates the effects of pre-deposited composite and single carbon on cobalt catalysts in FTS. Different types of carbon deposits (atomic carbon, polymeric carbon, graphitic carbon) are identified and characterized using TPH, Raman, and XPS. Results show that the presence of pre-deposited carbon significantly affects the catalytic activity, methane selectivity, and stability of the Co-based catalysts in FTS.
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)