Angewandte Chemie - International Edition

Công bố khoa học tiêu biểu

Sắp xếp:  
Electrochemical Synthesis of One‐Dimensional Mesoporous Pt Nanorods Using the Assembly of Surfactant Micelles in Confined Space
Angewandte Chemie - International Edition - Tập 52 Số 31 - Trang 8050-8053 - 2013
Cuiling Li, Takaaki Sato, Yusuke Yamauchi
Supportless Pt and PtPd Nanotubes as Electrocatalysts for Oxygen‐Reduction Reactions
Angewandte Chemie - International Edition - Tập 46 Số 22 - Trang 4060-4063 - 2007
Zhongwei Chen, Mahesh Waje, Wenzhen Li, Yushan Yan
All‐Metal Mesoporous Nanocolloids: Solution‐Phase Synthesis of Core–Shell Pd@Pt Nanoparticles with a Designed Concave Surface
Angewandte Chemie - International Edition - Tập 52 Số 51 - Trang 13611-13615 - 2013
Hamed Ataee‐Esfahani, Masataka Imura, Yusuke Yamauchi
Tunable‐Sized Polymeric Micelles and Their Assembly for the Preparation of Large Mesoporous Platinum Nanoparticles
Angewandte Chemie - International Edition - Tập 55 Số 34 - Trang 10037-10041 - 2016
Bo Jiang, Cuiling Li, Jing Tang, Toshiaki Takei, Jung Ho Kim, Yusuke Ide, Joel Henzie, Satoshi Tominaka, Yusuke Yamauchi
AbstractPlatinum nanoparticles with continuously tunable mesoporous structures were prepared by a simple, one‐step polymeric approach. By virtue of their large pore size, these structures have a high surface area that is accessible to reagents. In the synthetic method, variation of the solvent composition plays an essential role in the systematic control of pore size and particle shape. The mesoporous Pt catalyst exhibited superior electrocatalytic activity for the methanol oxidation reaction compared to commercially available Pt catalysts. This polymeric‐micelle approach provides an additional design concept for the creation of next generation of metallic catalysts.
Graphitic Carbon Nitride Polymers toward Sustainable Photoredox Catalysis
Angewandte Chemie - International Edition - Tập 54 Số 44 - Trang 12868-12884 - 2015
Yun Zheng, Lihua Lin, Bo Wang, Xinchen Wang
AbstractAs a promising two‐dimensional conjugated polymer, graphitic carbon nitride (g‐C3N4) has been utilized as a low‐cost, robust, metal‐free, and visible‐light‐active photocatalyst in the field of solar energy conversion. This Review mainly describes the latest advances in g‐C3N4 photocatalysts for water splitting. Their application in CO2 conversion, organosynthesis, and environmental purification is also briefly discussed. The methods to modify the electronic structure, nanostructure, crystal structure, and heterostructure of g‐C3N4, together with correlations between its structure and performance are illustrated. Perspectives on the challenges and opportunities for the future exploration of g‐C3N4 photocatalysts are provided. This Review will promote the utilization of g‐C3N4 materials in the fields of photocatalysis, energy conversion, environmental remediation, and sensors.
Integration of Lanthanide–Transition‐Metal Clusters onto CdS Surfaces for Photocatalytic Hydrogen Evolution
Angewandte Chemie - International Edition - Tập 57 Số 51 - Trang 16796-16800 - 2018
Rong Chen, Zhi‐Hao Yan, Xiang‐Jian Kong, La‐Sheng Long, Lan‐Sun Zheng
AbstractHeterometallic lanthanide–transition‐metal (4f–3d) clusters with well‐defined crystal structures integrate multiple metal centers and provide a platform for achieving synergistic catalytic effects. Herein, we present a strategy for enhanced hydrogen evolution by loading atomically precise 4f–3d clusters Ln52Ni56 on a CdS photoabsorber surface. Interestingly, some Ni2+ ions in the clusters Ln52Ni56 were exchanged by the Cd2+ to form Ln52Ni56−xCdx/CdS composites. Photocatalytic studies show that the efficient synergistic multipath charge separation and transfer from CdS to the Eu52Ni56−xCdx cluster enable high visible‐light‐driven hydrogen evolution at 25 353 μmol h−1 g−1. This work provides the strategy to design highly active photocatalytic hydrogen evolution catalysts by assembling heterometallic 4f–3d clusters on semiconductor materials.
Three‐Dimensional N‐Doped Graphene Hydrogel/NiCo Double Hydroxide Electrocatalysts for Highly Efficient Oxygen Evolution
Angewandte Chemie - International Edition - Tập 52 Số 51 - Trang 13567-13570 - 2013
Sheng Chen, Jingjing Duan, Mietek Jaroniec, Shi Zhang Qiao
In Situ and Theoretical Studies for the Dissociation of Water on an Active Ni/CeO<sub>2</sub> Catalyst: Importance of Strong Metal–Support Interactions for the Cleavage of O–H Bonds
Angewandte Chemie - International Edition - Tập 54 Số 13 - Trang 3917-3921 - 2015
Javier Carrasco, David López‐Durán, Zongyuan Liu, Tomáš Duchoň, Jonathan P. Evans, Sanjaya D. Senanayake, Ethan J. Crumlin, Vladimı́r Matolín, José A. Rodríguez, M. V. Ganduglia-Pirovano
AbstractWater dissociation is crucial in many catalytic reactions on oxide‐supported transition‐metal catalysts. Supported by experimental and density‐functional theory results, the effect of the support on OH bond cleavage activity is elucidated for nickel/ceria systems. Ambient‐pressure O 1s photoemission spectra at low Ni loadings on CeO2(111) reveal a substantially larger amount of OH groups as compared to the bare support. Computed activation energy barriers for water dissociation show an enhanced reactivity of Ni adatoms on CeO2(111) compared with pyramidal Ni4 particles with one Ni atom not in contact with the support, and extended Ni(111) surfaces. At the origin of this support effect is the ability of ceria to stabilize oxidized Ni2+ species by accommodating electrons in localized f‐states. The fast dissociation of water on Ni/CeO2 has a dramatic effect on the activity and stability of this system as a catalyst for the water‐gas shift and ethanol steam reforming reactions.
Efficient Solar Light Harvesting CdS/Co<sub>9</sub>S<sub>8</sub> Hollow Cubes for Z‐Scheme Photocatalytic Water Splitting
Angewandte Chemie - International Edition - Tập 56 Số 10 - Trang 2684-2688 - 2017
Bocheng Qiu, Qiaohong Zhu, Mengmeng Du, Linggang Fan, Mingyang Xing, Jinlong Zhang
AbstractHollow structures with an efficient light harvesting and tunable interior component offer great advantages for constructing a Z‐scheme system. Controlled design of hollow cobalt sulfide (Co9S8) cubes embedded with cadmium sulfide quantum dots (QDs) is described, using hollow Co(OH)2 as the template and a one‐pot hydrothermal strategy. The hollow CdS/Co9S8 cubes utilize multiple reflections of light in the cubic structure to achieve enhanced photocatalytic activity. Importantly, the photoexcited charge carriers can be effectively separated by the construction of a redox‐mediator‐free Z‐scheme system. The hydrogen evolution rate over hollow CdS/Co9S8 is 134 and 9.1 times higher than that of pure hollow Co9S8 and CdS QDs under simulated solar light irradiation, respectively. Moreover, this is the first report describing construction of a hollow Co9S8 based Z‐scheme system for photocatalytic water splitting, which gives full play to the advantages of light‐harvesting and charges separation.
Dye‐Sensitizer Effects on a Pt/KTa(Zr)O<sub>3</sub> Catalyst for the Photocatalytic Splitting of Water
Angewandte Chemie - International Edition - Tập 45 Số 9 - Trang 1420-1422 - 2006
Hidehisa Hagiwara, N. Ono, Takanori Inoue, Hiroshige Matsumoto, Tatsumi Ishihara
Tổng số: 362   
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 37