Results 141 to 150 of about 147,206 (344)

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

Constraining scalar fields with stellar kinematics and collisional dark matter

, 2010
The existence and detection of scalar fields could provide solutions to long-standing puzzles about the nature of dark matter, the dark compact objects at the centre of most galaxies, and other phenomena.
A. Bernal, A. Cruz-Osorio, A.A. Klypin, A.M. Ghez ., A.M. Ghez ., A.M. Ghez ., Argelia Bernal, F. Eisenhauer ., F.E. Schunck, F.S. Guzman, G. Efstathiou, J. Barranco, J. Kormendy, J.F. Navarro, J.R. Herrnstein, J.S. Bullock, J.S. Bullock, Juan Barranco, L.A. Ureña-López, Luciano Rezzolla, M. Alcubierre ., Pau Amaro-Seoane, R. Dave, R. Genzel, R. Schodel ., S. Doeleman ., S. Gillessen ., T. Matos   +27 more
core   +1 more source

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source

Interaction between Dark Matter and Dark Energy and the Cosmological Coincidence Problem

Advances in High Energy Physics, 2014
We consider a quintessence model of dark energy inspired by scalar-tensor theories of gravity where the scalar field is nonminimally coupled to gravity and dark matter. By considering exponential potential as self-interaction potential, the stability and
Kourosh Nozari, Noushin Behrouz, Narges Rashidi   +2 more
doaj   +1 more source

Enhancing CoFe Catalysts with V2CTX MXene‐Derived Materials for Anion Exchange Membrane Electrolyzers

Advanced Functional Materials, EarlyView.
MXene dervied CoFe composites show increased initial Oxygen Evolution Reaction (OER) activity compared to the pure CoFe and MXene in an Anion Exchange Membrane device. Vanadium vacancies in the MXene plays a role in increased OER activity and hinders Fe leaching in the AEM device over using the pure V2C MXene as a support material for the CoFe ...
Can Kaplan, Karuppasamy Dharmaraj, Thorsten Schultz, Leiqiang Qin, Ningjun Chen, Danielle A. Douglas‐Henry, Bastian Schmiedecke, Merve Buldu‐Akturk, Axel Zuber, Iris Dorbandt, Maximilian Reinhardt, Yael Rodriguez‐Ayllon, Yan Lu, Valeria Nicolosi, Norbert Koch, Johanna Rosen, Michelle P. Browne   +16 more
wiley   +1 more source

A singlet scalar assisted $$N_{2}$$ N 2 leptogenesis and pseudo-scalar dark matter

European Physical Journal C: Particles and Fields
We study the Leptogenesis and Dark Matter in the presence of an extra singlet complex scalar field in an extended discrete $$\mathcal {Z_{\textrm{3}}}$$ Z 3 symmetry. The vacuum expectation value of the new scalar spontaneously breaks the $$\mathcal {Z_{\
Dilip Kumar Ghosh, Purusottam Ghosh, Koustav Mukherjee, Nimmala Narendra   +3 more
doaj   +1 more source

Interacting Dark Matter and Dark Energy

, 2003
We discuss models for the cosmological dark sector in which the energy density of a scalar field approximates Einstein's cosmological constant and the scalar field value determines the dark matter particle mass by a Yukawa coupling. A model with one dark
Damour T., Dirac P. A. M., Fierz M., Glennys R. Farrar, Nordstrom G., P. J. E. Peebles, Wetterich C.   +6 more
core   +1 more source

Self‐supportive Three‐Way Photoelectrochemical System Achieving Uranium Recycling, Organic Oxidation, and Electricity Generation in Complex Waters

Advanced Functional Materials, EarlyView.
A self‐sustaining solar photoelectrochemical cell (SS‐PEC) is developed to recover uranium from aqueous UO22+ with concurrent organic oxidation and electricity production. The monolithical photoanode directly captures electrons from organic compounds, leading to the oxidation of organic compounds and the decomposition of uranium‐organic complexes ...
Yumei Wang, Qingming Zeng, Haodong Ji, Rongzhong Wang, Jiachen Wang, Yanjun Wen, Wonyong Choi, Qingyi Zeng   +7 more
wiley   +1 more source

Dynamics of dark matter misalignment through the Higgs portal

Journal of High Energy Physics
A light singlet scalar field feebly coupled through the super-renormalizable Higgs portal provides a minimal and well-motivated realization of ultra-light bosonic dark matter.
Brian Batell, Akshay Ghalsasi, Mudit Rai
doaj   +1 more source

FLRW model coupled with mass less scalar field in f(T) gravity-Two fluid scenario

East European Journal of Physics
In this work, we investigate a cosmological model within the framework of modified teleparallel gravity, known as f(T) gravity, by considering a spatially flat Friedmann-Lemaître-Robertson-Walker (FLRW) Universe filled with two fluids-barotropic matter ...
Vilas B. Raut, Sanjay A. Salve
doaj   +1 more source