Article
Green & Sustainable Science & Technology
Piyush Pratap Singh, Anurag Jaswal, Neelkanth Nirmalkar, Tarak Mondal
Summary: Hydrogen is a renewable and sustainable energy source that can be produced from biomass. This study focused on developing a stable catalytic system for producing green hydrogen through bio-oil steam reforming. Perovskite catalysts LaNi0.5M0.5O3 (M = Co, Cu, and Fe) were synthesized and evaluated for their catalytic performance. The results demonstrated the successful formation of perovskite structure with desired properties. Optimization of process parameters and time on stream studies were conducted to establish an efficient catalytic system.
Article
Engineering, Chemical
Joao Paulo da S. Q. Menezes, Gabriel M. Guimaraes, Monica A. P. da Silva, Mariana M. V. M. Souza
Summary: This study investigates hydrogen production using butanol as a model compound for bio-oil through steam reforming, with catalysts containing NiO and promoted with cerium and lanthanum oxides showing higher stability and hydrogen yield, and lower coke formation. The use of unmodified catalyst led to significant deactivation due to higher acidity.
Article
Chemistry, Physical
Theodora Ramantani, Vissarion Evangeliou, George Kormentzas, Dimitris I. Kondarides
Summary: The steam reforming of propane and LPG has been investigated over various catalysts on metal oxide supports. It was found that Ru and Rh catalysts exhibit higher activity, while the performance of Al2O3-supported Rh and 10%Ni catalysts deteriorates with time. The Ru-containing catalysts are more stable due to the formation of easily gasified carbon. The Ru/CeO2-ZrO2 catalyst showed the best results with high activity, selectivity, and stability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Applied
Kun Zhao, Rongjiang Zhang, Yunfei Gao, Yan Lin, Anqi Liu, Xiaobo Wang, Anqing Zheng, Zhen Huang, Zengli Zhao
Summary: This study investigated the use of perovskites as oxygen carriers for chemical looping steam methane reforming, finding that La0.95Ce0.05Ni0.2Fe0.8O3 and La0.95Ce0.05-Ni0.5Fe0.5O3 showed high efficiency in methane partial oxidation and steam splitting, potentially simplifying the separation step for pure hydrogen acquisition.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Tingting Xu, Xun Wang, Haibo Zhao, Bo Xiao, Dong Liu, Wen Liu
Summary: Doping of heteroatoms in brownmillerite-structured Ca2Fe2O5 can induce structural changes and enhance lattice oxygen activity and oxygen transfer capacity, leading to improved chemical looping steam reforming of biomass tar for higher syngas productivity and hydrogen purity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Applied
Yong Beom Park, Jae Hyung Choi, Seong Chan Lee, Chul Woo Lee, Seung Han Woo, Jaekyoung Lee, Hee Chul Woo
Summary: Hydrogen is a sustainable energy resource, and hydrogen production from macroalgae can replace fossil fuels. In this study, steam reforming experiments using metal titanate-based Ni catalysts showed that Ni/SrTiO3 catalyst exhibited the highest hydrogen selectivity and H2/CO ratio, indicating its potential as an alternative to fossil fuels.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Chao Wang, Wei Liu, Mingzheng Liao, Jiahong Weng, Jian Shen, Ying Chen, Yanping Du
Summary: This paper reports the application of high entropy oxides (HEO) in ethanol steam reforming (ESR) and the characterization of a spinel-phase nano structure HEO. The results show that an abundance of oxygen vacancies were formed in the HEO and the metals spilled out as active species for hydrogen production during ESR. The HEO also exhibited a high thermal stability and achieved a high hydrogen yield and selectivity. This research offers possibilities for thermal catalytic hydrogen production under high temperature conditions.
Review
Engineering, Chemical
Sheraj Z. Sayyed, Prakash D. Vaidya
Summary: The study discusses the development of the Chemical looping-steam reforming (CL-SR) technology focusing on the performance and impact of oxygen carriers on reactions, as well as the research results on oxygen carriers for different fuel species.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Kun Yang, Zhenhua Gu, Yanhui Long, Shen Lin, Chunqiang Lu, Xing Zhu, Hua Wang, Kongzhai Li
Summary: This study focuses on producing pure H-2 from coke oven gas (COG) using chemical looping reforming technology. La0.5Sr0.5FeO3 shows the highest methane conversion rate, hydrogen yield, and hydrogen purity among different perovskite oxides studied.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Energy & Fuels
Amir Mosayebi
Summary: This study investigates the kinetic and stability properties of phenol steam reforming reaction under specific temperature and flow rate conditions. The experimental and calculated results show that the kinetic model accurately predicts the experimental hydrogen yield. The stability analysis reveals that the conversion and yields of the catalyst remain stable over a certain period of time before declining.
Article
Chemistry, Multidisciplinary
Apoorva M. Ranjekar, Ganapati D. Yadav
Summary: The efficacy of CeAlO3 perovskite as a support for a bimetal catalyst in steam reforming of methanol (SRM) was investigated. Different loadings of Cu-Zn on CeAlO3 were studied for their activity and selectivity. The superior catalyst 10%Cu-10%Zn/CeAlO3 showed high activity, selectivity, and minimal carbon deposition.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Mingqiang Chen, Defang Liang, Yishuang Wang, Chunsheng Wang, Zhiyuan Tang, Chang Li, Jiaxin Hu, Wen Cheng, Zhonglian Yang, Han Zhang, Jun Wang
Summary: Ethanol steam reforming (ESR) is a promising technology for hydrogen production, but efficient Ni-based catalysts are still a challenge. In this study, M-Ni/ Sepiolite catalysts were synthesized and characterized, showing that La, Mg, and Ca promoters enhance Ni-0 active sites. The Ca-Ni/SEP catalyst exhibited high carbon conversion and hydrogen yield due to small Ni particle size and strong metal-support interaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Yuchen Jiang, Xianglin Li, Chao Li, Lijun Zhang, Shu Zhang, Bin Li, Shuang Wang, Xun Hu
Summary: Pyro-reforming is a process that combines the pyrolysis of waste plastics with steam reforming of their derived volatiles. The study investigated the reaction behaviors and coke properties in the pyro-reforming of five representative plastics. The results showed that different plastics had different reactivity with steam and formed different types of coke, with PE having the highest hydrogen yield, PVC promoting heavy aromatics formation, and PET and PS forming inert polymeric coke.
Article
Chemistry, Physical
Lucas G. Moura, Rafael P. Borges, Fabio B. Noronha, Carla E. Hori
Summary: The study investigated the catalytic activity and stability of nickel, platinum, rhodium, and ruthenium-based catalysts during hydrogen production from steam reforming of liquefied petroleum gas. It was found that rhodium and platinum catalysts exhibited higher catalytic activity and lower deactivation compared to nickel and ruthenium catalysts. Small increases in particle sizes of Ni(0) and Ru(0) during the process could contribute to the faster deactivation of Ru/CS and Ni/CS catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jose L. C. Fajin, M. Natalia D. S. Cordeiro
Summary: Ni-Cu catalysts are low cost, highly selective for CO2 and H-2 in methanol steam reforming, blocking the production of methane, CO, and coke. The mechanism of methanol steam reforming on Ni-Cu surfaces involves methanol decomposition followed by the water-gas shift reaction, with a minority route for direct CO2 formation. The Ni-Cu alloy suppresses methane and coke formation and has a high desorption barrier for CO species, avoiding its production.
Article
Chemistry, Physical
Kota Murakami, Yuta Mizutani, Hiroshi Sampei, Atsushi Ishikawa, Yasushi Sekine
Summary: The study investigates the correlation between metal-oxide interactions and the properties of supported metal on CeO2, revealing that CO adsorption on Me-1 is strongly dependent on the binding energies of Me-1, which are influenced by charge transfer and metal oxophilicity. The results suggest that activities of Me-1 can be predicted based on the strength of anchoring by oxide supports, with smaller ionic radii of doped heterocations leading to more tightly bound Me-1.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Yukiko Hosono, Hikaru Saito, Takuma Higo, Kosuke Watanabe, Kazuharu Ito, Hideaki Tsuneki, Shun Maeda, Kunihide Hashimoto, Yasushi Sekine
Summary: The study demonstrates that Ce0.8Co0.2O2 catalyst doped with transition metal shows high activity and selectivity for ethylene production in the presence of steam, operating through the Mars-van Krevelen mechanism. The Co-CeO2 interactions play a crucial role in controlling the characteristics of the reactive lattice oxygen suitable for EDH.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Masahiko Matsukata, Yasushi Sekine, Eiichi Kikuchi, Motomu Sakai, Bharathi Subramanian, Makoto Toyoda, Taisuke Furuhata
Summary: Y-type zeolite membranes were prepared on a porous tubular a-alumina support by a secondary growth process. The experimental results showed that seed size, pH of seed solution, and degassing of support played significant roles in membrane deposition process. Optimization of these parameters resulted in crack-free compact membranes that effectively separated a mixture of isopropyl alcohol and water in a vapor-phase separation process.
Article
Chemistry, Multidisciplinary
Hiroshi Sampei, Koki Saegusa, Kenshin Chishima, Takuma Higo, Shu Tanaka, Yoshihiro Yayama, Makoto Nakamura, Koichi Kimura, Yasushi Sekine
Summary: Quantum annealing is used to predict molecular adsorption on solid surfaces. The evaluation of adsorption is crucial for various fields, but it is challenging to predict the stable coordination for multi-molecular adsorption. This report presents a novel method that uses the quantum annealing principle to quickly search for adsorption coordination, providing faster search speed and more stable molecular arrangement findings than conventional methods.
Article
Chemistry, Multidisciplinary
Keke Kang, Sota Kakihara, Takuma Higo, Hiroshi Sampei, Koki Saegusa, Yasushi Sekine
Summary: In this study, it was found that the reverse water gas shift (RWGS) reaction can be carried out at low temperatures without equilibrium constraints using chemical looping (CL) method. With the newly developed MGa2Ox materials, almost 100% CO2 conversion was achieved at temperatures as low as 673 K, greatly reducing the cost for CO2 separation. This finding is a significant advancement for the future utilization of CO2.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yasushi Sekine
Summary: Low-temperature ammonia synthesis using a solid heterogeneous catalyst under the influence of an electric field was studied. The reaction efficiency was improved by the associative mechanism facilitated by proton-conducting species on the catalyst support surface, leading to the formation of N2Had intermediates. Various analysis techniques were employed to investigate the role of metal and catalyst support structure, and computational chemistry was used for further analysis. The study showed that the catalytic activity shifted from N-2 dissociation to N2H formation, resulting in efficient ammonia synthesis at low temperatures even with base metal catalysts like Fe and Ni.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Multidisciplinary
Ayaka Motomura, Yuki Nakaya, Clarence Sampson, Takuma Higo, Maki Torimoto, Hideaki Tsuneki, Shinya Furukawa, Yasushi Sekine
Summary: Dry reforming of methane (DRM) is a promising reaction for converting greenhouse gases into syngas. By applying an electric field and using Ni-Fe bimetallic catalysts, the difficulties in conventional thermal catalytic reactions can be overcome.
Article
Chemistry, Multidisciplinary
Taku Matsuda, Ryo Ishibashi, Yoshiki Koshizuka, Hideaki Tsuneki, Yasushi Sekine
Summary: This study provides a quantitative analysis of oxide surface protonics in a dry H-2 atmosphere. The results show that the conductivity of porous CeO2 increases significantly when H-2 is supplied, with dissociative adsorption of H-2 playing a key role in conduction.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Kaho Nagakawa, Hiroshi Sampei, Ayako Takahashi, Jun Sasaki, Takuma Higo, Naoya Mori, Hideto Sato, Yasushi Sekine
Summary: The effect of OH-groups on the surface of a Ni catalyst for low-temperature steam reforming of methane in an electric field was investigated. It was found that adding hydrogen and steam in the pre-treatment, as well as the presence of an electric field, can enhance the catalyst activity by increasing the surface OH-groups and Ni(OH)2 content, thereby improving the surface proton conduction.
Article
Chemistry, Multidisciplinary
Kosuke Watanabe, Takuma Higo, Hideaki Tsuneki, Shun Maeda, Kunihide Hashimoto, Yasushi Sekine
Summary: This study found that the perovskite oxide YCrO3 exhibits higher catalytic activity and C2H4 selectivity in the presence of steam, which is significant for improving the efficient production of ethylene. Steam plays an important role in stabilizing the catalyst's high activity and inhibiting coke accumulation.
Article
Chemistry, Multidisciplinary
Naoya Nakano, Maki Torimoto, Hiroshi Sampei, Reiji Yamashita, Ryota Yamano, Koki Saegusa, Ayaka Motomura, Kaho Nagakawa, Hideaki Tsuneki, Shuhei Ogo, Yasushi Sekine
Summary: This study investigates the effect of an electric field on the dry reforming of methane. The results show that the application of an electric field significantly enhances the conversion rate of methane and carbon dioxide, and promotes the reaction between surface oxygen and methane at the Pt and CeO2 interface.
Article
Chemistry, Multidisciplinary
Jun-Ichiro Makiura, Sota Kakihara, Takuma Higo, Naoki Ito, Yuichiro Hirano, Yasushi Sekine
Summary: The conversion of CO2 to CO by reverse water-gas shift using chemical looping is an efficient process for CO production, and Co-In2O3 has been developed as a suitable oxygen storage material for this process, showing high CO2 splitting rate and durability.
CHEMICAL COMMUNICATIONS
(2022)
Review
Chemistry, Physical
Maki Torimoto, Yasushi Sekine
Summary: This article provides an overview of recent research on alloy catalysts, which have excellent catalytic performance in methane reforming reactions. Alloy catalysts can improve activity, stability, and resistance to carbon deposition, making them highly promising for various applications.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ayaka Shigemoto, Takuma Higo, Yuki Narita, Seiji Yamazoe, Toru Uenishi, Yasushi Sekine
Summary: With the increasing use of electrically driven automobiles and the combination of engines and motors, the exhaust temperatures of internal combustion engines are decreasing. Therefore, there is a need for improved performance of exhaust gas purification catalysts. This study found that applying a direct current electric field to a Pd-supported catalyst showed high purification rates even at low temperatures.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yasushi Sekine, Ryo Manabe
Summary: Combining heterogeneous catalysts with direct current electric fields can achieve high catalytic activities at low temperatures, with surface proton hopping playing a crucial role in these reactions at lower temperatures.
FARADAY DISCUSSIONS
(2021)
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)
