Results 31 to 40 of about 135,433 (268)

Preparation of Tin-doped Carbon Hollow Spheres and Their Electrocatalytic activity in Water Electrolysis

International Journal of Electrochemical Science, 2013
Hollow carbon sphere electrocatalysts were synthesized by combining the hydrothermal and intermittent microwave heating (IMH) technique. The addition of P123 as surfactant has created huge amount of pores, resulted in the ultrahigh surface area of 1300 ...
Jayeeta Chattopadhyay, Rohit Srivastava, P.K. Srivastava   +2 more
doaj   +1 more source

Memory of the Unjamming Transition during Cyclic Tiltings of a Granular Pile [PDF]

, 2005
Discrete numerical simulations are performed to study the evolution of the micro-structure and the response of a granular packing during successive loading-unloading cycles, consisting of quasi-static rotations in the gravity field between opposite ...
A. Coniglio, A. Kabla, A. Mangeney, A. Mehta, B. Utter, F. Radjai, G. D. R. MiDi, H. A. Joer, J.-P. Vilotte, L. Staron, M. Oda, M. Satake, N. P. Kruyt, O. Dauchot, R. J. Bathurst, S. Deboeuf, S. F. Edwards, S. Nemat-Nasser, S. Nemat-Nasser   +18 more
core   +4 more sources

Study on stress state and integrity of cement sheath in well cementing of CCS pilot well in block A, East China Sea [PDF]

Youqicang pingjia yu kaifa
The shallow CO2 geological storage in block A of the East China Sea faces challenges such as large difference in horizontal in-situ stress and significant influence of cyclic stress.
HAO Feng, DU Shuai, YANG Xuefeng, WANG Kexin, GAO Dongliang, HUANG Da
doaj   +1 more source

Plastic collapse of pipe bends under combined internal pressure and in-plane bending [PDF]

, 2005
Plastic collapse of pipe bends with attached straight pipes under combined internal pressure and in-plane closing moment is investigated by elastic–plastic finite element analysis.
Li, H., Mackenzie, D., Robertson, A.C.
core   +1 more source

Nitride‐Reinforced Metal Matrix Nanocomposite Powders Production by Plasma‐Assisted Thermochemical Treatment of Intermetallic Powders

Advanced Engineering Materials, EarlyView.
This study proposes a new methodology for producing metal matrix nanocomposites in the solid state. The process involves the plasma‐assisted thermochemical treatment of metallic alloy powders. As a proof‐of‐concept, TiN nanoparticles are synthesized directly on the surface of FeTi intermetallic powder particles, enabling the development of the ...
Deivison Daros Paim, Antônio Rogério de Souza, Tatiana Bendo, Aloisio Nelmo Klein, Rodrigo Perito Cardoso   +4 more
wiley   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

Advanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan, Marie Le Pivert, Alireza Ranjbari, Diana Dragoe, Daniel Bahena‐Uribe, Christophe Colbeau‐Justin, Christian Herrero, Dorota Rutkowska‐Zbik, Johnny Deschamps, Hynd Remita   +9 more
wiley   +1 more source

Bimetallic Nanoparticles as Cocatalysts for Photocatalytic Hydrogen Production

Advanced Functional Materials, EarlyView.
Recent developments have introduced bimetallic nanoparticles as effective cocatalysts for photocatalytic systems. This review explores the rapidly expanding research on bimetallic cocatalysts for photocatalytic production of hydrogen, emphasizing the creation of carrier‐selective contacts, localized surface plasmon resonance effects, methodologies for ...
Yufen Chen, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Jordi Llorca, Lluís Soler   +4 more
wiley   +1 more source

Expediting redox kinetics of sulfur species by atomic‐scale electrocatalysts in lithium–sulfur batteries

InfoMat, 2019
Lithium–sulfur (Li–S) batteries have extremely high theoretical energy density that make them as promising systems toward vast practical applications.
Bo‐Quan Li, Long Kong, Chang‐Xin Zhao, Qi Jin, Xiao Chen, Hong‐Jie Peng, Jin‐Lei Qin, Jin‐Xiu Chen, Hong Yuan, Qiang Zhang, Jia‐Qi Huang   +10 more
doaj   +1 more source

Effects of intermittently applied cyclic loading on proteoglycan metabolism and swelling behaviour of articular cartilage explants

Osteoarthritis and Cartilage, 1999
The aim of this study was to evaluate the effect of tissue load, frequency and load duration on the biosynthesis and release of proteoglycans (PGs) as well as on the swelling behaviour of cultured mature bovine articular cartilage superimposed with intermittent loads.Cyclic compressive pressure was introduced for 1, 3 or 6 days using a sinusoidal ...
Steinmeyer, Jürgen, Knue, Sabine, Raiss, Ruth X., Pelzer, Ingeborg   +3 more
openaire   +2 more sources

CO2 Reduction on Copper‐Nitrogen‐Doped Carbon Catalysts Tuned by Pulsed Potential Electrolysis: Effect of Pulse Potential

Advanced Functional Materials, EarlyView.
This study demonstrates that pulsed potential electrolysis significantly improves CO2 reduction performance on copper‐nitrogen doped carbon electrodes. The formation of cationic copper sites and metallic clusters as a function of applied intermittent potential leads to notable selectivity changes compared to potentiostatic reduction.
Dorottya Hursán, Janis Timoshenko, Andrea Martini, Hyo Sang Jeon, Eduardo Ortega, Martina Rüscher, Arno Bergmann, Aram Yoon, Uta Hejral, Antonia Herzog, Clara Rettenmaier, Felix T. Haase, Philipp Grosse, Beatriz Roldan Cuenya   +13 more
wiley   +1 more source