Article
Chemistry, Physical
Ning Yuan, Arnar Gudmundsson, Karl P. J. Gustafson, Michael Oschmann, Cheuk-Wai Tai, Ingmar Persson, Xiaodong Zou, Oscar Verho, Eva G. Bajnoczi, Jan-E Backvall
Summary: By utilizing in situ X-ray absorption spectroscopy (XAS), researchers uncovered the deactivation mechanism of palladium catalyst in the cycloisomerization of acetylenic acids and developed an improved catalytic protocol that is less prone to deactivation.
Review
Chemistry, Multidisciplinary
Tianlei Wang, Arunabhiram Chutia, Dan J. L. Brett, Paul R. Shearing, Guanjie He, Guoliang Chai, Ivan P. Parkin
Summary: Palladium-based alloy materials are being considered as potential substitutes for platinum-based catalysts in fuel cells for the reduction of oxygen. Through a scientometric analysis, research fronts and hotspots have been identified, with volcano plots showing general principles for catalyst modifications to enhance the oxygen reduction reaction. Various influencing factors, such as alloying, structure, and particle size, are discussed for their potential in improving the ORR activity.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Irina Ritsch, Elisabeth Lehmann, Leonidas Emmanouilidis, Maxim Yulikov, Frederic Allain, Gunnar Jeschke
Summary: The interaction between hnRNP A1 and specific RNA induces liquid-droplet formation, which depends on RNA concentration and sequence. Additionally, point mutations in RNA affect local protein dynamics.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Physical
M. Anpo, G. Costentin, E. Giamello, H. Lauron-Pernot, Z. Sojka
Summary: This review provides an overview of surface oxygen species on oxide materials, including their nature, characterization, formation pathways, and involvement in catalytic and photocatalytic reactions. Special focus is given to the application of advanced techniques such as EPR and PL for detailed characterization of different oxygen species on oxide surfaces.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Jinn-Kye Lee, Shuyang Wu, Pei Chong Lim, Zhengyang Zhang
Summary: This study presents a facile approach to visualize the in situ formation of copper and oxygen vacancies on the surface of Cu2O under ambient condition. The results reveal significant heterogeneity in the rate of defect formation at different facets, and the location of defect formation changes during the photocorrosion process.
Article
Chemistry, Multidisciplinary
Shun-Shun Qin, Ze-Kun Wang, Lei Hu, Xing-Hao Du, Zheng Wu, Maria Stromme, Qian-Feng Zhang, Chao Xu
Summary: Porous organic frameworks (POFs) with tunable structures have been widely studied in adsorption and catalysis. Introducing ionic structures into POFs enhances their functionalities for applications in metal scavenging and catalysis. This study reports a guanidinium-based ionic POF with excellent performance in palladium scavenging and heterogeneous catalysis.
Review
Chemistry, Multidisciplinary
Fengjuan Qin, Wenxing Chen
Summary: Single-atom alloy (SAA) catalysts play an important role in heterogeneous catalysis, with wide applications and outstanding performance in improving atom utilization and catalytic selectivity. Research progress on copper-based single-atom alloys is promising and shows potential applications in various catalytic reactions.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Georgia Zahariou, Nikolaos Ioannidis, Yiannis Sanakis, Dimitrios A. Pantazis
Summary: The study reveals the importance of the S-3 state in the water-oxidizing Mn4CaO5 cluster of PSII, as it binds a substrate and precedes O-2 evolution. Methanol-treated PSII shows a previously uncharacterized high-spin species, coexisting with the known intermediate-spin conformation. These results provide insights into the structural heterogeneity of the S-3 state and offer constraints on the S-3 to S-4 transition and the mechanism of O-O bond formation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Environmental Sciences
Carlos Mendoza, Anthony Desert, Lhoussain Khrouz, Carlos A. Paez, Stephane Parola, Benoit Heinrichs
Summary: The immobilization of photosensitizers on mesoporous materials has opened up a new way for the generation of singlet oxygen, which can be used for the degradation of organic pollutants and environmental applications, reducing environmental impact. It was found that the in situ generation of singlet oxygen was enhanced when Rose Bengal was immobilized inside mesoporous SiO2.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Ander Diego-Lopez, Oscar Cabezuelo, Alejandro Vidal-Moya, M. Luisa Marin, Francisco Bosca
Summary: A new optimized photocatalyst with SiO2 as a supporting substrate and a shell of WO3 nanoparticles decorated with Fe3O4 nanocrystals has been developed for wastewater remediation at neutral pH. Its photocatalytic activity was evaluated on the photodegradation of methylene blue (MB) and diclofenac (DCF), and the generation of .OH was proven to be responsible for the oxidation processes. The synergistic effect between Fe3O4 and WO3 in the presence of light and H2O2 enhances the generation of .OH.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Physical
Juan Camilo Arango-Daza, Carles Lluna-Galan, Luis Izquierdo-Aranda, Jose R. Cabrero-Antonino, Rosa Adam
Summary: A heterogeneous catalytic system for the acceptorless dehydrogenative condensation between N,N'-disubstituted ureas and 1,2-diols to produce imidazolones was developed. The designed palladium nanoaggregates on an alumina matrix showed good activity and selectivity, with wide applicability and moderate to good yields. Mechanistic studies and characterization were performed, revealing the key factors for the catalyst's activity. Furthermore, a Pd-Zn cooperation effect was described, and bimetallic materials were also designed and characterized properly.
Article
Chemistry, Physical
Valeria Lagostina, Eleonora Romeo, Anna Maria Ferrari, Valter Maurino, Mario Chiesa
Summary: Metal atoms and ions on well-defined anatase TiO2 crystals exhibit promising potential as a platform for fundamental studies in catalysis. The geometric and electronic structures of supported paramagnetic vanadium catalysts were investigated, revealing the influence of TiO2 surface termination on the molecular structures of the catalysts. These findings contribute to the development of novel catalytic systems with higher activities.
JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Environmental
Xinyuan Lv, Miao Yu, Yali Guo, Minghao Sui
Summary: In this study, silver-doped cobalt ferrite catalysts were synthesized and used for the activation of peroxymonosulfate in the degradation of sulfamethoxazole. The results showed that Ag-0.06-CoFe2O4 exhibited the best catalytic activity and utilization efficiency, and the silver doping led to the exposure of more active sites and an increase in the concentration of oxygen vacancies.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Organic
Hans-Joachim Gais
Summary: Allylic oxygen compounds are versatile building blocks in synthesis. Catalytic deracemization is an attractive method for their enantioselective synthesis. This review discusses the palladium-catalyzed and iridium-catalyzed dynamic kinetic asymmetric transformations of allylic oxygen compounds with various nucleophiles.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Wei Hong, William A. Swann, Vamakshi Yadav, Christina W. Li
Summary: This Perspective provides an overview of the research progress in heterogeneous directed hydrogenation and investigates the effects of directing group identity, substrate structure, and catalyst composition on diastereoselectivity. It is found that monometallic heterogeneous catalysts can only selectively hydrogenate a limited set of substrates. The use of bimetallic catalysts presents opportunities to develop more tunable and general heterogeneous directed hydrogenation catalysts.
Article
Chemistry, Physical
Weiwei Lin, Haiyang Cheng, Qifan Wu, Chao Zhang, Masahiko Arai, Fengyu Zhao
Article
Chemistry, Multidisciplinary
Xinchao Wang, Peixuan Wu, Zhuangqing Wang, Leilei Zhou, Yanchun Liu, Haiyang Cheng, Masahiko Arai, Chao Zhang, Fengyu Zhao
Summary: The Cl-modified Ru/TiO2 catalyst shows higher phenol selectivity in the conversion of guaiacol, but exhibits weaker aromatic ring hydrogenation ability, resulting in slower consumption of phenol.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Zhuangqing Wang, Xinchao Wang, Chao Zhang, Masahiko Arai, Leilei Zhou, Fengyu Zhao
Summary: The selective hydrogenation of furfural to furfuryl alcohol over Pd/TiH2 catalysts was studied, with 0.5Pd/TiH2 showing the highest selectivity at 73% at 60 degrees C. The physicochemical properties of catalysts were well characterized, revealing the significant influence of Pd particle size, electronic state, and surface defects on catalytic performance. Furfural preferentially adsorbs on the boundary of Pd particles and TiH2 support, leading to high furfuryl alcohol selectivity.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Inorganic & Nuclear
Bin Zhang, Yan Zhang, Guangcai Chang, Zheming Wang, Daoben Zhu
Summary: Crystal-to-crystal transformation is a method to obtain crystals with different structures and properties, where K-2[Co(C2O4)(2)(H2O)(2)]·4H2O (1) can transform into K-2[Co(μ-C2O4)(C2O4)] (2) through dehydration. While 1 is an antiferromagnetic molecular crystal, 2 exhibits antiferromagnetic ordering at 8.2 K.
Article
Chemistry, Multidisciplinary
Bin Zhang, Wei Zhou, Jie Zhang, Zirui Gao, Danyang Cheng, Lipeng Tang, Xingwu Liu, Yueqin Song, Chunyang Dong, Yao Xu, Jie Yan, Mi Peng, Huizhen Liu, Mark Douthwaite, Meng Wang, Ding Ma
Summary: Isomerization of paraffins remains a challenge, but mesoporous tungsten-zirconia supported Pt catalysts showed improved initial productivity. Close proximity between Pt and WOx species plays a significant role in isomerization, while acid density and metallicity affect the triggering of isomerization and activation of C-H bonds.
Correction
Chemistry, Physical
Zhuangqing Wang, Xinchao Wang, Chao Zhang, Masahiko Arai, Leilei Zhou, Fengyu Zhao
MOLECULAR CATALYSIS
(2022)
Article
Electrochemistry
Qiming Sun, Yiwei Zhao, Xiaodan Yu, Chao Zhang, Shuangxi Xing
Summary: This study demonstrates a facile route to synthesize a bifunctional electrocatalyst with CoO nanoparticles embedded in N-doped carbon by interface engineering. The synthesized material exhibits excellent electrocatalytic activity and stability for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in a zinc-air battery.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Qiu Xu, Chungang Wang, Zongling Shang, Chao Zhang, Xinchao Wang, Qiang Liu, Lingling Dang, Yanchun Liu, Fengyu Zhao
Summary: This study investigates the transformation of lactones to diols over Cu/Al2O3 and CuLax/Al2O3 catalysts, and discusses the promoting role of LaOx species in improving the selectivity and stability of the catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Analytical
Ying Qu, Bin Zhang, Hairong Chu, Xiaoxia Yang, Honghai Shen, Jingzhong Zhang
Summary: This paper proposes a linear-nonlinear switching active disturbance rejection control strategy based on linear-nonlinear switching extended state observer and linear-nonlinear switching state error feedback control law to improve the contradiction between response speed and control precision in nonlinear active disturbance rejection control caused by the limitation of parameter alpha. The proposed strategy is applied to a permanent magnet synchronous motor experimental platform, and the results demonstrate that it can balance response speed and control precision effectively and has strong disturbance rejection capability.
Article
Chemistry, Multidisciplinary
Xinchao Wang, Zhuangqing Wang, Leilei Zhou, Yanchun Liu, Yinze Yang, Liyan Zhang, Zongling Shang, Hui Li, Tingting Xiao, Chao Zhang, Fengyu Zhao
Summary: A Ti-modified SiO2 supported catalyst Ru/Ti-SiO2 was developed for the highly efficient conversion of guaiacol to phenol in an aqueous phase, showing enhanced activity and selectivity. The presence of Ti-O-Si linkages in the support promoted the formation of defect-rich TiOx species, which helped inhibit the aggregation of Ru particles and increased their dispersion, leading to improved catalytic performance. The main active sites for the deoxygenation of guaiacol on the Ru/Ti-SiO2 catalyst were found to be the interface between Ru and TiOx species (Ru-0-Ti3+), facilitating the activation of the C-O bond.
Article
Chemistry, Multidisciplinary
Peixuan Wu, Haiyang Cheng, Xinchao Wang, Ruhui Shi, Chao Zhang, Masahiko Arai, Fengyu Zhao
Summary: The synthesis of a new environmentally friendly, self-healing, and recyclable polymeric material PUUa-DA, using CO2 and bio-based furfuryl amine, demonstrates high thermal stability and mechanical properties. The incorporation of reversible hydrogen bonds and heat-responsive Diels-Alder bonds enables 94% recovery of tensile strength upon heating, making it a potential functional material for various practical applications.
Article
Optics
Guo Pengfei, Li Yuxia, Li Jianfeng, Zhang Bin, Wu Xiaoxia
ACTA OPTICA SINICA
(2020)
Article
Chemistry, Physical
Qiang Liu, Zhenbo Zhao, Masahiko Arai, Chao Zhang, Ke Liu, Ruhui Shi, Peixuan Wu, Zhuangqing Wang, Weiwei Lin, Haiyang Cheng, Fengyu Zhao
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Bin Zhang, Mark Douthwaite, Qiang Liu, Chao Zhang, Qifan Wu, Ruhui Shi, Peixuan Wu, Ke Liu, Zhuangqing Wang, Weiwei Lin, Haiyang Cheng, Ding Ma, Fengyu Zhao, Graham J. Hutchings
Article
Chemistry, Physical
Leilei Zhou, Weiwei Lin, Ke Liu, Zhuangqing Wang, Qiang Liu, Haiyang Cheng, Chao Zhang, Masahiko Arai, Fengyu Zhao
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
