Article
Nanoscience & Nanotechnology
Adam Prekob, Gabor Muranszky, Milan Szori, Gabor Karacs, Ferenc Kristaly, Tibor Ferenczi, Bela Fiser, Bela Viskolcz, Laszlo Vanyorek
Summary: Carbon black-supported palladium-platinum catalysts were prepared with and without nickel(II) oxide or iron(III) oxide promoter materials using ultrasonic cavitation technology. The one-step catalyst preparation method without the need for post-treatments showed excellent catalytic activity in the hydrogenation of nitrobenzene, with no significant differences in selectivity and aniline yield observed even when promoters were present.
Article
Chemistry, Multidisciplinary
Bei Huang, Ke Wang, Fanxing Zhang, Xianfeng Shen, Kewu Yang, Yi He, Keping Yan, Yao Shi, Pengfei Xie
Summary: The application of Pt/gamma-Al2O3 catalysts in C3H6 combustion was investigated. Through different synthesis methods, Pt/gamma-Al2O3 catalysts with diverse Pt nanoparticle size distributions were obtained. Pt-RD catalysts showed higher catalytic activity than Pt-IW catalysts, with the 1% Pt-RD3 catalyst exhibiting the best performance at 110 degrees C. XPS analysis confirmed that a higher proportion of Pt-0 was beneficial for C3H6 combustion, while DRIFTS analysis revealed the involvement of Pt-0 atoms at edge and corner surface sites as active sites in C3H6 oxidation. Extended experiments showed that the 1% Pt-RD3 catalyst had strong water tolerance and high reactivity towards other pollutants. This work provides valuable insights into the synthesis and applications of Pt-based catalysts for hydrocarbon combustion.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Zhicheng Wang, Tao Xu, Dingding Tang, Yan Zhou, Bijuan Zheng, Yicheng Qiu, Dongkai He, Xiang Zeng, Rui Jiang, Xuhui Mao
Summary: Citric acid-modified Al2O3 spheres were used as a support for loading iron species, resulting in a highly dispersed and high-performance Fe-III/CA-Al2O3 catalyst.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Peerapol Pornsetmetakul, Narasiri Maineawklang, Anittha Prasertsab, Saros Salakhum, Emiel J. M. Hensen, Chularat Wattanakit
Summary: This study presents a method for hydrogenation of 2-furoic acid at ambient conditions using hydrogen generated by NaBH4 hydrolysis with the assistance of a catalyst. The results show nearly complete conversion of FCA with THFA and 5-HVA as the main reaction products. The use of ZSM-5 nanosheets contributes to the stability of Pt nanoparticles, and deactivation of Pt particles can be countered by a simple washing treatment.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Wenqian Fu, Lei Zhang, TingYu Tao, Tiandi Tang
Summary: Preparation of Ni2P nanoclusters with high stability and small cluster size on mesoporous ZSM-5 zeolite was achieved through citric acid-assisted, two-step impregnation method. The obtained Ni2P clusters exhibit higher intrinsic activity in the semi hydrogenation of phenylacetylene compared to other supported Ni2P catalysts.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Yicheng Ye, Qiaohong Zhang, Dezhong Xie, Chen Chen, Fan Li, Hu Wang, Shun Zhang, Wei Zhang
Summary: This study presents a catalytic hydrogenation removal strategy using silver nanoparticles supported on phenyl group-modified silica to ultradeeply remove acetaldehyde (AA) in ethanol. The strategy successfully controls AA content in ethanol below 0.1 ppm within 5 hours, improving the safety of ethanol-based products.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qiuyue Ding, Wumin Zhang, Yuanyuan Zhu, Lu Wang, Xinyuan Feng, Yanyan Xi, Xufeng Lin
Summary: Catalytic Fenton oxidation is an effective method to remove organic pollutants in water, and the performance of the catalyst is crucial. Various supported bimetallic Pt-Cu catalysts were prepared and investigated for their performance in the oxidation of aniline. The Pt0.5Cu1.5/AC catalyst exhibited superb catalytic activity, with a synergistic effect between Pt and Cu components.
Article
Chemistry, Physical
Xingru Yan, Shuo Huang, Fan Yang, Siyuan Sun, Ge Zhang, Bo Jiang, Bing Zhang, Sai Che, Wang Yang, Yongfeng Li
Summary: A high-performance and non-noble metal hydrogen evolution reaction (HER) electrocatalyst (Ni2P/PC) was developed using a facile hydrothermal synthesis, demonstrating excellent electrocatalytic activity. The PC substrate successfully adjusted the electron density of Ni2P, leading to improved catalyst performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Haoxi Jiang, Guangshen Li, Jing Wang, Sheng Wang
Summary: It is found that when Na2PtCl6 and SnCl2 are used as precursor salts, the metal particle size of Pt-Sn/Al2O3 is the smallest at 0.7 nm; bimetals exist in the form of PtSn alloy and its catalytic reforming activity is also the best. Increasing the Sn/Pt ratio further reduces the particle size of Pt and increases its dispersion, showing the best catalytic activity when the ratio is 1.5.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Applied
Haoxi Jiang, Zhonghua Liu, Chuanxu Yao, Sheng Wang
Summary: In this study, the Pt/H beta catalyst was fabricated for the first time via supercritical fluid deposition (SFD) and its activity for toluene catalytic combustion was evaluated. The catalyst prepared by SFD showed smaller size, higher dispersion, and lower T90 compared to the catalyst prepared by impregnation (IM), demonstrating obvious size and reduction effects on the Pt/H beta catalyst.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Xin Ai, Hongmei Xie, Shengming Chen, Guizhi Zhang, Benjing Xu, Guilin Zhou
Summary: The extensive use of fossil energy leads to the wanton emission of CO2 and serious environmental problems. This paper focuses on the utilization of CO2 resources and the design of a high active CO2 hydrogenation catalyst. Cu/gamma-Al2O3 catalysts were prepared using wet impregnation and grinding methods, and their physicochemical properties were characterized. The results demonstrate the significance of Cu content on the catalyst's performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Teng Du, Miao Cui, Yue Chao, Yuxuan Xiao, Ziqi Ren, Yonglin An, Changgong Meng
Summary: High dispersion of SmVO4 nanoparticles on HMOR zeolite is achieved by a template-free method, resulting in a highly efficient photocatalyst. The synergistic effect of SmVO4 and HMOR improves the removal efficiency of RhB.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Engineering, Environmental
Hang Yu, Yuhong Luo, Changcheng Wu, Aizhong Jia, Yanji Wang, Lanlan Wu, Jingde Li
Summary: This study proposes a high-performance electrocatalyst for oxygen reduction reaction (ORR) using a conductive oxygen-deficient tungsten oxynitride framework. The catalyst, composed of highly dispersed cobalt nanoclusters loaded on a three-dimensionally ordered macroporous structure, demonstrates excellent catalytic activity and durability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Zhe Han, Chizhou Tang, Jijie Wang, Landong Li, Can Li
Summary: The methanol selectivity of In2O3 catalyst can be significantly enhanced by introducing a small amount of Pt, leading to a higher efficiency in the process of CO2 hydrogenation to methanol.
JOURNAL OF CATALYSIS
(2021)
Article
Energy & Fuels
Xu Li, Long Yan, Ziyue Liu, Yuhe Liao, Longlong Ma
Summary: A novel Pt/TiO2(B) catalyst was developed, which significantly improved the catalytic activity by modifying organic functional TiO2(B) nanosheets. Through the synergistic effect of highly dispersed Pt species and TiO2(B) supports, phenol was efficiently converted into cyclohexane and cyclohexanol under mild conditions without extra acid. This study provides a new understanding of green catalysis and a novel approach for catalyst development.
Article
Chemistry, Multidisciplinary
Hirokazu Kobayashi, Yusuke Suzuki, Takuya Sagawa, Makoto Saito, Atsushi Fukuoka
Summary: Oligosaccharides, especially chitin-oligosaccharides, have important functions in various fields, particularly in agriculture. However, the selective synthesis of oligosaccharides has been a challenge. In this study, a carbon catalyst was used to convert chitin into chitin-oligosaccharides with high selectivity and good yields.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Inorganic & Nuclear
Ryota Sakamoto, Ryojun Toyoda, Guan Jingyan, Yuta Nishina, Kazuhide Kamiya, Hirotomo Nishihara, Tomoki Ogoshi
Summary: This review summarizes the role of coordination chemistry in the innovation of carbon materials, and introduces the synthesis methods, application areas, and the potential of conductive molecular frameworks as alternative materials in coordination-chemistry-based carbon materials.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Physical
Koki Chida, Takeharu Yoshii, Norihito Hiyoshi, Tetsuji Itoh, Jun Maruyama, Kazuhide Kamiya, Masataka Inoue, Fumito Tani, Hirotomo Nishihara
Summary: Ordered carbonaceous frameworks (OCFs) are unique carbon alloys that combine the advantages of organic-based nanoporous frameworks and carbon materials. This study demonstrates the synthesis of OCFs with single-atomic Co and Cu sites, which show developed microporosity and electrochemical activity, as well as a synergistic effect between Co and Cu.
Article
Chemistry, Physical
Nazmul H. Md. Dostagir, Atsushi Fukuoka, Abhijit Shrotri
Summary: In this study, a mixed oxide catalyst doped with indium (In) was found to selectively synthesize CO at low temperature and high pressure, with a formation rate of 22 μmol g(-1) s(-1). The CO selectivity exceeded 99% at 350℃ and 3 MPa pressure. The catalyst exhibited durability for over 100 hours of continuous operation. The formation of methanol and methane was limited due to the redox mechanism of the catalyst at the oxide interface. This study highlights the development of a promoter-free oxide catalyst for CO2 hydrogenation and emphasizes the importance of the redox property for selective synthesis of CO2 to CO under unfavorable conditions.
Article
Chemistry, Physical
Aika Harako, Shuhei Shimoda, Keita Suzuki, Atsushi Fukuoka, Tomoya Takada
Summary: Electron beam (EB) irradiation was used to improve the photocatalytic efficiency of graphitic carbon nitride (g-C3N4) for Rhodamine B (RhB) decomposition. Irradiation up to 200 kGy increased the efficiency, but further irradiation decreased it. EB irradiation altered the chemical structure and surface properties of g-C3N4. Low-dose irradiation introduced defects and increased surface hollow depth, improving the photocatalytic efficiency. In contrast, high-dose irradiation decreased surface hollow depth due to intense structural destruction.
CHEMICAL PHYSICS LETTERS
(2023)
Review
Energy & Fuels
Atsushi Fukuoka, Hirokazu Kobayashi
Summary: This review article summarizes our research on heterogeneous catalysis for converting cellulose and chitin into valuable chemicals. We discovered that Pt supported on carbon is a more active and durable catalyst for cellulose hydrolysis, and weakly acidic carbon can be used for the synthesis of glucose and other valuable cello-oligosaccharides. We also studied the depolymerization of chitin to oligomers and N-acetylglucosamine using mechanocatalysis.
JOURNAL OF THE JAPAN PETROLEUM INSTITUTE
(2023)
Article
Chemistry, Multidisciplinary
Abhijit Shrotri, Kiko Eguchi, Lina Mahardiani, Hirokazu Kobayashi, Masakuni Yamashita, Hiroshi Yagita, Atsushi Fukuoka
Summary: Cellulose hydrolysis to glucose using a heterogeneous catalyst can be achieved by solvent-assisted adsorption as a pretreatment step, wherein phosphoric acid (H3PO4) performs better than other solvents. This method has a high glucose yield of 73%.
CHEMISTRY-SWITZERLAND
(2023)
Review
Chemistry, Physical
Yayati Naresh Palai, Atsushi Fukuoka, Abhijit Shrotri
Summary: This article summarizes the recent developments in catalytic synthesis of C4 chemicals from biomass-derived sugars and their derivatives, and suggests future research directions. C4 chemicals play a vital role in the chemical industry, and sourcing them from biomass can reduce reliance on petrochemicals.
Article
Engineering, Environmental
Ryoto Ono, Shuhei Shimoda, Atsushi Fukuoka, Tomoya Takada
Summary: We investigated the effects of pore structure and adsorption conditions on the fluoride removal capacity of Zr-modified porous carbons. Zr modification significantly improved the adsorption capacity of the porous carbons, with the maximum amount of fluoride adsorbed increasing by 3-10 times. The adsorption capacity depended on the pore size and was influenced by pH and the presence of coexisting anions.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2023)
Article
Chemistry, Physical
Lingcong Li, Abhijit Shrotri, Kazuya Kato, Atsushi Fukuoka, Hirokazu Kobayashi
Summary: This study demonstrates that a mordenite-supported rhenium catalyst is more active and resistant to oxidation compared to traditional oxide-supported rhenium catalysts in the partial oxidation of methane reaction. The catalyst produces CO and H-2 at high yields and low temperatures, with mordenite stabilizing low valent rhenium species that facilitate the direct oxidation pathway of methane.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Hirokazu Kobayashi, Takuya Sagawa, Atsushi Fukuoka
Summary: This article summarises several methods for converting chitin into N-acetylglucosamine and oligomers, and introduces the importance and application prospects of chitin for establishing a sustainable carbon and nitrogen cycle.
CHEMICAL COMMUNICATIONS
(2023)
Meeting Abstract
Chemistry, Physical
Hirotomo Nishihara, Hong-Wei Zhao, Kazuya Kanamaru, Keita Nomura, Mao Ohwada, Masashi Ito, Li-Xiang Li, Bai-Gang An, Toshihide Horikawa, Takashi Kyotani
Article
Chemistry, Physical
Daniele Padovan, Koichiro Endo, Takeshi Matsumoto, Toshiyuki Yokoi, Atsushi Fukuoka, Hideki Kato, Kiyotaka Nakajima
Summary: The acid-base properties of amphoteric crystalline YNbO4 are adjusted by impregnating phosphate groups, resulting in materials with increased activity and selectivity in glucose dehydration. The introduction of phosphate groups leads to the optimal catalyst, 5P-YNbO4, which exhibits 50% selectivity at 75% conversion. The catalyst can be deactivated due to carbon deposits, but its activity can be completely recovered through washing and calcination.
Article
Chemistry, Physical
Qi Zhao, Masanori Yamamoto, Kaoru Yamazaki, Hirotomo Nishihara, Rachel Crespo-Otero, Devis Di Tommaso
Summary: Chemical vapor deposition of methane onto alumina nanoparticles is an important method for synthesizing graphene meso-sponge. The initial stages of graphene growth on alumina surfaces were studied using density functional theory calculations. The mechanism of methane dissociation and the formation of reactive intermediates were modeled. The study provides insights into the catalytic activity and growth behavior of graphene on alumina surfaces.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Hirotomo Nishihara, Akio Harigaya, Alberto Castro-Muniz, Mao Ohwada, Takashi Kyotani, Yuta Nishina
Summary: Microporous polymers with exposed C-60 surfaces have been synthesized by a new esterification pathway, exhibiting a high specific surface area and enhanced hydrogen spillover.
CHEMICAL COMMUNICATIONS
(2022)
