Article
Chemistry, Physical
Kazuhiro Manseki, Saeid Vafaei, Loren Scott, Katelyn Hampton, Nagisa Hattori, Kosuke Ohira, Kyle Prochotsky, Stephen Jala, Takashi Sugiura
Summary: We have demonstrated the identification of the structure and narrow-bandgap property of hybridized SnO/SnO2 nanoparticles derived from tin(II) oxalate. By changing the calcination temperatures, we observed the simultaneous formation of 1D SnO/SnO2 in rod particles. It was also found that Sn(II) can be introduced by adjusting the concentration of Sn(II) salt and the maximum temperature in calcination. These materials with optical property would be beneficial for the design of photoenergy conversion systems.
Article
Nanoscience & Nanotechnology
A. C. Meng, R. Serra-Maia, K-B Low, H. Lang, E. A. Stach
Summary: The effect of the driving force on the growth of palladium nanoparticles was systematically investigated through comparative analysis of different reduction methods. Ascorbic acid was found to promote the formation of smaller, more tightly spaced palladium nanoparticles and reduce dendritic growth. Real-time observation of the nanoparticle formation process was achieved through electrochemical water splitting.
MATERIALS TODAY NANO
(2023)
Article
Chemistry, Physical
Ya-Wei Zhou, Ya-Feng Chen, Xianxian Qin, Kun Jiang, Wen-Feng Lin, Wen-Bin Cai
Summary: In this study, Pd nanosheets decorated with SnO2 nanoflakes (Pd@SnO2-NSs) were designed as a composite catalyst for formic acid electro-oxidation, showing superior performance compared to pristine Pd nanosheets (Pd-NSs). In situ attenuated total reflection infrared (ATR-IR) spectroscopic results suggest a promoted formate pathway on the Pd@SnO2-NSs with suppressed accumulation of CO poisoning species. DFT calculations further indicate that the Pd (111) surface modified with SnO2 has lower energy barriers for key reactions in formic acid electro-oxidation.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Inorganic & Nuclear
Digvijay Sah, Javaid Shabir, Surabhi, Padmini Gupta, Subho Mozumdar
Summary: An efficient and facile strategy was adopted for the stepwise synthesis of the RGO-MSiO2/PdO hybrid nanomaterial (HY-NM), which exhibited excellent catalytic activity in multicomponent reactions due to its high surface area and large porosity facilitating the interaction of reactant molecules with the catalytic active species. The catalyst could be recycled multiple times, demonstrating ease of handling, and a simple work-up procedure as its main features.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Ceramics
Yuksel Akinay, Hilal Celik Kazici, Ihsan Nuri Akkus, Firat Salman
Summary: Highly efficient 3D flower-like and rod-like Sb2O3 and Sn: Sb2O3 catalysts were successfully synthesized using co-precipitation methods for electro-catalytic hydrogen evolution reactions. Among them, the rod-like Sn: Sb2O3 particles exhibited excellent catalytic performance in acidic environments, showing high stability during chronoamperometric studies at constant potential for approximately 2000 seconds.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Sebastian Ohman, Olivier Donzel-Gargand, Mats Boman, Tobias Torndahl
Summary: Understanding crystallization and its controlling mechanisms is crucial for improving the design of inorganic materials. In this study, in situ heating in a transmission electron microscope (TEM) was used to investigate the crystallization phenomena in an Al-Ti-O system. The results indicate that crystallization occurs through a two-step process, with initial formation of numerous smaller crystals followed by rapid growth. The study also reveals the polymorphic nature of the amorphous-to-crystalline transformation and the preferential growth into larger crystals, suggesting a diffusionless mechanism.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Environmental Sciences
Azam Khan, Inam Ullah, Afaq Ullah Khan, Bilal Ahmad, Khadijah Mohammedsaleh Katubi, Norah Salem Alsaiari, Muhammad Saleem, Mohd Zahid Ansari, Jianjun Liu
Summary: This study investigates the impact of CuO and SnO2-based catalysts with different CuO concentrations on photocatalytic and supercapacitor applications. Three different CuO/SnO2 composites were prepared and their optimized performance was evaluated. The results show that the CuO/SnO2 nanocomposite exhibits enhanced photocatalytic degradation performance and improved capacitive performance compared to pure SnO2 and CuO.
Article
Chemistry, Multidisciplinary
Rui Serra-Maia, Pawan Kumar, Andrew C. Meng, Alexandre C. Foucher, Yijin Kang, Khim Karki, Deep Jariwala, Eric A. Stach
Summary: Liquid-cell scanning/transmission electron microscopy (S/TEM) has been used to study nanostructure nucleation and growth, electrochemistry, and corrosion. By generating a gas bubble during electrochemical water splitting, the thickness of the liquid can be reduced to allow for atomic-scale analysis. This method enables multi-modal, nanoscale understanding of solid-state samples in liquid media.
Article
Chemistry, Multidisciplinary
Jiamin Tian, Mei Sun, Mengyu Hong, Bocheng Yu, Menglan Li, Yu Geng, Shuo Li, Yue Zhang, Zhihong Li, Qing Chen
Summary: The wet chemical etching process of zinc oxide (ZnO) nanowires in radiolytic water was studied using liquid cell transmission electron microscopy (LCTEM). It was found that the dissolution rate of thin nanowires remains constant with reducing diameter, while thick nanowires exhibit complex etching behaviors. The dissolution rate of thick nanowires is constant at first and then increases, and anisotropic etching occurs at both ends of thick nanowires leading to the formation of distinct tips. The polarity difference at the two ends of the nanowire and the arrangement of sidewall cones determine the shape and formation process of the tips.
Article
Chemistry, Physical
Xing Huang, Arik Beck, Alexey Fedorov, Hannes Frey, Bingsen Zhang, Bernhard Kloetzer, Jeroen A. van Bokhoven, Christophe Coperet, Marc-Georg Willinger
Summary: This study investigates the structures and phases of an industrial Cu/ZnO/Al2O3 catalyst using in situ and ex situ transmission electron microscopy. The research reveals high structural inhomogeneity in the catalyst and demonstrates the formation of various phases with different compositions during activation and reaction. The study also uncovers the intimate contact between metallic copper particles and zinc oxide phases, and the potentially important role of alumina in stabilizing zinc species.
Article
Chemistry, Applied
Thatiane V. dos Santos, Dhara B. A. Pryston, Geovania C. Assis, Mario R. Meneghetti, Simoni M. P. Meneghetti
Summary: This study synthesized mixed metal oxides based on renewable chemicals, exhibiting high specific surface areas and increased Lewis acid sites, leading to efficient conversion of fructose and promising selectivity for 5-HMF production.
Article
Engineering, Electrical & Electronic
M. Humayan Kabir, Antara Bhattacharjee, M. Manjorul Islam, M. S. Rahman, Md. Saifur Rahman, M. K. R. Khan
Summary: Cadmium oxide (CdO) and strontium (Sr) doped cadmium oxide (SCO) thin films were fabricated using the spray pyrolysis technique, with investigations into their structure, morphology, optical, and electrical properties. The results showed significant changes in morphology and optical properties with Sr doping, leading to variations in band gap values, as well as metal-like behavior in electrical resistivity and n-type semiconductor properties in the films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Environmental
Yehezkiel Steven Kurniawan, Arif Cahyo Imawan, Yoeretisa Miggia Stansyah, Tutik Dwi Wahyuningsih
Summary: A simple and efficient method for synthesizing acetophenone derivatives using PdO-activated bentonite as a heterogeneous catalyst was successfully developed. The synthesis of acetophenone derivatives with various substituents at the para position achieved high yields under optimal conditions. The catalysis mechanism was proposed to be mainly facilitated by the acid sites of the PdO-activated bentonite catalyst, which showed good recyclability and environmental friendliness.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Cyril Tlou Selepe, Sandile Surprise Gwebu, Thabo Matthews, Tebogo Abigail Mashola, Ludwe Luther Sikeyi, Memory Zikhali, Nobanathi Wendy Maxakato
Summary: Carbon nano-onions (CNOs) were successfully synthesized using flame pyrolysis, with Pd-Sn/CNOs electro-catalysts showing improved performance in methanol and ethanol electro-oxidation under alkaline conditions. The characterization techniques confirmed the structure and properties of the materials, with PdSn alloy formation on the CNO surface contributing to the enhanced catalytic activity.
Article
Engineering, Environmental
Dahong Huang, David J. Kim, Kali Rigby, Xuechen Zhou, Xuanhao Wu, Aidan Meese, Junfeng Niu, Eli Stavitski, Jae-Hong Kim
Summary: In this study, Pd catalysts were loaded onto reduced graphene oxide (rGO) in a single-atom fashion, showing significantly improved electrocatalytic performance for hydrodechlorination reactions compared to Pd nanoparticles. The single-atom Pd-1 catalyst enhances Pd atomic efficiency and suppresses catalyst poisoning, leading to cost reduction and increased efficiency in practical applications. The superior performance of Pd-1/rGO is attributed to enhanced electron transfer and increased hydrogen utilization efficiency, showcasing the potential of single-atom catalysts in environmental remediation applications.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Naoya Fujiwara, Hironori Nagase, Shohei Tada, Ryuji Kikuchi
Summary: In the experiment of high-efficiency steam electrolysis at intermediate temperatures, the key stability issues of proton-conducting solid acid electrolytes were found to be the migration of electrolyte and the design of the anode. The study demonstrated that using Pt mesh as an alternative anode could significantly improve stability.
Article
Chemistry, Physical
Yao Yuan, Shohei Tada, Ryuji Kikuchi
Summary: Electrochemically promoted nitrogen reduction on solid-state electrolytes is a promising approach for synthesizing ammonia. NH3 production on an Fe/BZY catalyst was enhanced under applied voltages, with the reaction rates gradually changing as the reaction progressed. The electrochemical promotion of NH3 production was explained by the gradual removal of H adatoms from the catalyst and the resultant increase in N adsorption sites.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Physical
Younghwan Im, Hiroki Muroyama, Toshiaki Matsui, Koichi Eguchi
Summary: The basic property of the catalyst can influence the catalytic performance for NH3 decomposition by alleviating the associative desorption of N atom. The strength of the basic property can modify the electronic state of the impregnated Ru particles and enhance the desorption step of N atoms, thus improving the catalytic activity for NH3 decomposition.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Physical
Hirokazu Kojima, Kensaku Nagasawa, Naoto Todoroki, Yoshikazu Ito, Toshiaki Matsui, Ryo Nakajima
Summary: The development of renewable energy technologies is crucial for achieving carbon neutrality. Stable storage and transportation of hydrogen in large quantities can maximize power utilization. A detailed understanding of the characteristics and operating methods of fluctuating power-driven water electrolysis technologies is essential for green hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Wenwen Zhang, Hiroki Muroyama, Yuichi Mikami, Qingshi Liu, Xiaojuan Liu, Toshiaki Matsui, Koichi Eguchi
Summary: A novel triple-conducting composite cathode for protonic ceramic fuel cells, BaCo0.7(Zr0.8Y0.2)0.3O3-delta (BCZY), is developed by replacing cerium with zirconium in BaCo0.7(Ce0.8Y0.2)0.3O3-delta (BCCY) to construct strongly interacting interfaces. BCZY exhibits superior oxygen reduction reaction (ORR) activity and stability, with a polarization resistance of 0.25 omega cm2 at 600 degrees C and excellent performance maintained for 206 hours. The enhanced ORR activity and stability are attributed to the high concentration of active sites and the strong hydration capability at strongly interacting interfaces of Co-rich and Zr-rich phases introduced by interdiffusion of Co and Zr.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Masato Machida, Hideto Yoshida, Naoto Kamiuchi, Yasuhiro Fujino, Takeshi Miki, Masaaki Haneda, Yutaro Tsurunari, Shundai Iwashita, Rion Ohta, Hiroshi Yoshida, Junya Ohyama, Masayuki Tsushida
Summary: Under dynamic SLR cycle conditions, the Rh/ZrO2-CeO2 (Rh/ZC) three-way catalyst experienced more severe deactivation compared to static conditions. The complete encapsulation of Rh particles with a ZC overlayer under dynamic SLR cycle conditions led to physical blockage and suppressed catalytic activity. This encapsulation phenomenon was not recovered by post-treatment in air at 1000 degrees C.
Article
Nanoscience & Nanotechnology
Masato Machida, Hideto Yoshida, Naoto Kamiuchi, Yasuhiro Fujino, Takeshi Miki, Masaaki Haneda, Yutaro Tsurunari, Shundai Iwashita, Rion Ohta, Hiroshi Yoshida, Junya Ohyama
Summary: This study investigates the performance of catalysts after real engine aging and finds that pre-aged catalysts can maintain better catalytic performance at high temperatures. It is found that the migration of Rh nanoparticles from the ZC surface to the Al2O3 binder interface plays a crucial role in mitigating the encapsulation of Rh nanoparticles by ZC. By using a dual-oxide support formulation, the deterioration extent of the catalyst and the oxygen storage capacity performance can be effectively improved.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Shohei Tada, Hiroka Kinoshita, Duanxing Li, Masahiko Nishijima, Harune Yamaguchi, Ryuji Kikcuhi, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki
Summary: In recent years, global warming caused by CO2 emissions has become a critical problem. In order to address this issue, a bifunctional catalyst that can convert CO2 to lower olefins in a single stage has been developed. The best performance of the catalyst was achieved when the two catalysts were mixed in close proximity.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Electrochemistry
Shinji Naruse, Hiroki Muroyama, Toshiaki Matsui, Koichi Eguchi
Summary: This study investigates the application of the heteropolyanion of [PW12O40]3- as an anode redox mediator in redox flow polymer electrolyte fuel cells (PEFCs). A novel reduction method using the corrosion reaction of metals in strong acid aqueous solutions is explored. The results show that aluminum is the most effective metal for reducing oxidized heteropolyanions, while cobalt has lower fuel efficiency.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Naoki Hashimoto, Kohsuke Mori, Shuichiro Matsuzaki, Kazuki Iwama, Ryota Kitaura, Naoto Kamiuchi, Hideto Yoshida, Hiromi Yamashita
Summary: The synthesis of CeO2 nanorods (CeO2-NRs) with sub-nanometer CoNiCuZnPdHEA clusters was achieved through the aid of hydrogen spillover effect. These sub-nanoclusters exhibited higher activity in the reduction of NO by H-2 at low temperatures and demonstrated a unique structural reversibility in oxidative/reductive conditions due to the sacrificial oxidation of non-noble metals. Experimental and theoretical analyses confirmed the novel catalytic properties of these multielement HEA clusters.
Article
Chemistry, Physical
Toshiaki Matsui, Takashi Ozeki, Kazunari Miyazaki, Sadahiro Nagasaka, Hiroki Muroyama, Kenichi Imagawa, Yoshimi Okada, Koichi Eguchi
Summary: This study demonstrates the development of novel proton conductors that can operate at intermediate temperatures, especially 300-400°C, through a simple ion-exchange method. The electrical conductivity of the developed conductor was evaluated at different temperatures and its main charge carrier was identified as a proton. These findings open up the possibility of realizing new electrochemical devices that can operate at 200-400°C.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Masato Machida, Hideto Yoshida, Naoto Kamiuchi, Yasuhiro Fujino, Takeshi Miki, Masaaki Haneda, Yutaro Tsurunari, Shundai Iwashita, Rion Ohta, Hiroshi Yoshida, Junya Ohyama, Masayuki Tsushida
Summary: A Rh/ZrO2-CeO2 (Rh/ZC) three-way catalyst exhibited more severe deactivation under dynamic SLR cycle conditions compared to static conditions. The total encapsulation of Rh particles by a ZC overlayer led to physical blockage and suppressed catalytic activity. The encapsulation under a dynamic SLR cycle condition suggests the activation of ZC migration near the metal-support interface.
Article
Chemistry, Physical
Shinji Naruse, Hiroki Muroyama, Toshiaki Matsui, Koichi Eguchi
Summary: This study semi-quantitatively determined the constituent amounts of PMA redox species using 31P NMR measurements, and found that the redox component of heteropolyanions has an impact on the performance of redox flow PEFCs.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Applied
Wenwen Zhang, Hiroki Muroyama, Yuichi Mikami, Toshiaki Matsui, Koichi Eguchi
Summary: This study reports the surface manipulation of a triple-conducting cathode to enhance the oxygen reduction reaction (ORR) activity and CO2 tolerance in protonic ceramic fuel cells (PCFCs). The addition of an efficient catalyst coating significantly improves the ORR activity and reduces the polarization resistance of the cathode, while maintaining CO2 tolerance.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yao Yuan, Naoya Fujiwara, Shohei Tada, Ryuji Kikuchi
Summary: In this study, in situ DRIFTS measurements were conducted on an Fe/BZY-Ru cathode catalyst in an electrolysis cell using a CsH2PO4/SiP2O7 electrolyte under mixed N2-H2 gas flow and polarization. The results confirmed the formation of N2Hx species under polarization and verified an associative mechanism in the electrochemical NRR process.
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)
