F a C o Y

Configurational entropy and instability of tachyonic braneworld

“…Tachyon dynamics on unstable D-branes was investigated in [2][3][4] through boundary conformal field theory and effective field theory. In particular, such effective field theory has been extensively applied to inhomogeneous rolling tachyon [5][6][7][8], creation of closed string and particle [9,10] and instability of D-branes of codimension-one [9,[11][12][13].…”

Configurational entropy of tachyon kinks on unstable Dp-branes

“…It was found that rolling tachyon solutions through boundary conformal field theory and effective field theory describe the motion of the tachyon on unstable D-branes [2][3][4]. It was extensively studied for the inhomogeneous tachyon condensation [5][6][7][8], the emission of closed string radiation [9,10] and for instability of codimension-one D-branes [9,[11][12][13].…”

Polypyrrole‐Assisted Co3O4 Anchored Carbon Fiber as a Binder‐Free Electrode for Seawater Batteries

“…[1][2][3][4] Viable ways to meet these requirements are regarded as rechargeable metal-air batteries owing to their extremely high theoretical energy density compared to that of Li-ion batteries (~150-400 Wh kg À 1 ). [2,5,6] Because these metal-air batteries are sharing the same electrochemical reaction mechanisms, well known as oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), oxygen related electrochemical catalysts are intensively researched for the last decade. However, due to their complex nature of electrochemical reactions, the high overpotentials during ORR and OER are inevitable and usually have forced the use of noble metal-based catalysts (Pt/C, RuO 2 , and IrO 2 ).…”

“…[9][10][11][12][13][14][15] In spite of these advances, it has been pointed out that it cannot be a key solution for metal-air batteries because carbon-based catalysts are usually suffering corrosions under an electrochemically oxidative condition, resulting in serious deteriorations of overall cell performances. [5] Meanwhile, transition metal oxides, such as spinel, pyrochlore, and perovskite oxides, have been suggested as potential candidates to noble metal-based OER catalysts. [6,[16][17][18][19][20] Though their efficient OER activities, the sluggish ORR kinetics of these transition metal oxides necessitate proper support of carbon.…”

“…[6,[16][17][18][19][20] Though their efficient OER activities, the sluggish ORR kinetics of these transition metal oxides necessitate proper support of carbon. [5,[21][22][23] Thus many works have been carried out to fabricate bifunctional electrocatalysts by growing or mixing the oxide catalysts to carbon-based materials. [22,[24][25][26][27] From a different view, it is important to recognize the drawbacks of metal-air batteries are not only arisen from the activities and kinetics of catalysts.…”