Results 11 to 20 of about 408 (183)

Atomic Precision CoCu Heterodimers with Pseudo-D_3h Symmetry Enable Tandem Nitrate Reduction. [PDF]

Adv Sci (Weinh)
The Co─Cu heterodimer anchored on nitrogen‐doped graphene oxide substrate facilitates electrochemical nitrate reduction in alkaline medium. Co site promotes water dissociation to supply a proton, while Cu sites enhance nitrate adsorption and activation.
Rajan APS, Theerthagiri J, Junmon P, Limphirat W, Yodsin N, Choi MY.   +5 more
europepmc   +2 more sources

Atomic Level Fabrication of Oxychloride Interface for High-Rate and High-Voltage Lithium-Ion Batteries. [PDF]

Angew Chem Int Ed Engl
Synthesis of a lithium‐ion conductive aluminum‐based oxychloride (LAOC) thin film is realized by a facile atomic‐level chemical fabrication method. LAOC coating enables lithium cobalt oxide (LCO) cathode superior cycling performance at high rates and elevated voltages, owing to the fast interfacial ionic transport and excellent interfacial stability ...
Sun Y, Ma J, Yao X, Ren H, Zhang W, Feng L, Hu H, Lin X, Gao Y, Guan Y, Wang C, Sun X.   +11 more
europepmc   +3 more sources

Pyrolysis-Free Formed Cooperative Coupling Pt-Co Dual-Functional Sites for Saline Electrolysis with High Adaptability. [PDF]

Adv Sci (Weinh)
Through a mild pyrolysis‐free route, cooperative coupling of single cobalt atoms (CoSA) and fully exposed platinum nanoclusters (PtNC) is assembled. As expected, the as‐prepared catalysts PtNC/CPF‐Co exhibit dual‐functional performance and high adaptability, demonstrating low overpotentials of 44 mV for HER and 340 mV for OER at 10 mA cm−2 in saline ...
Yan J, Li WY, Wang ZD, Qin JH, Peng P, Zang SQ.   +5 more
europepmc   +2 more sources

O₂-Accessible Fe-N₄ Active Site Density Boosts Efficient Oxygen Reduction to Fuel-Cell Level. [PDF]

Adv Mater
This study investigates the role of hierarchical nanostructure design in optimizing oxygen mass transport for the oxygen reduction. Using atomically dispersed Fe–N–C catalysts with solid, yolk‐shell, and hollow structures, it demonstrates that the yolk‐shell architecture provides superior O2 accessibility to active Fe–N4 sites.
Zhang T, Liang C, Sun S, Xi S, Zhuang Z, Yuan J, Guo ZX, Liu J.   +7 more
europepmc   +2 more sources

^*OH Adsorption-Mediated Electrochemical Oxidation of 5-Hydroxymethylfurfural to Selective 2,5-Furandicarboxylic Acid at pH 12. [PDF]

Adv Sci (Weinh)
Under the weakly alkaline condition, at pH 12, the *OH adsorption–mediated mechanism of direct aldehyde oxidation is demonstrated to complete HMF oxidation to FDCA, obtaining >95% selectivity and yield. In OH−‐deficient media, high FDCA selectivity is achieved on the CuO/NiOOH interface, a synergistic active site, where Cu enhances *OH utilization, and
Lee E, Hwang J, Yoo S, Choi J, An HJ, Han SH, Kim T, Han JW, Hwang YJ.   +8 more
europepmc   +2 more sources

Shakedown loading optimization under constrained residual displacements—formulation and solution for circular plates

Journal of Civil Engineering and Management, 2002
The adapted plate load optimization problem is formulated applying the non-linear mathematical programming methods. The load variation bounds satisfying the optimality criterion in concert with the strength and stiffness requirements are to be identified.
Ela Jarmolajeva, Juozas Atkočiūnas
doaj   +1 more source

Shakedown analysis method for composites based on homogenization theory

工程科学学报, 2019
Direct methods of plastic analysis are widely used in composites analysis to determine material strength for safety assessment or lightweight optimization design.
Fang QIN, Le-le ZHANG, Song-hua HUANG, Geng CHEN   +3 more
doaj   +1 more source

Assessment of the Durability of Threaded Joints

Applied Sciences, 2021
The article deals with the determination of the resistance to cyclic loading of the threaded joints of pressure vessels and defective elements according to the failure mechanics criteria.
Žilvinas Bazaras, Mindaugas Leonavičius, Vaidas Lukoševičius, Laurencas Raslavičius   +3 more
doaj   +1 more source

A MODIFIED SHAKEDOWN ANALYSIS FOR KINEMATIC HARDENING PIPING UNDER THERMAL-MECHANICAL LOAD

Jixie qiangdu, 2020
Shakedown analysis is a powerful tool for the ratchet ＆ alternating plasticity prediction of the pressure piping under thermal-mechanical loads. In order to achieve the shakedown analysis containing the synergetic influence of the kinematic hardening and
HUANG Song, CHEN ZhiPing, LI You
doaj  

Plastic Shakedown Behavior and Deformation Mechanisms of Ti17 Alloy under Long Term Creep–Fatigue Loading

Metals
Ti17 alloy is mainly used to manufacture aero-engine discs due to its excellent properties such as high strength, toughness and hardenability. It is often subjected to creep–fatigue cyclic loading in service environments.
Jianguo Wang, Tongchi Man, Dong Liu, Zhihong Zhang, Chi Zhang, Yuxiang Sun   +5 more
doaj   +1 more source