A carbon nanotube-gold nanohybrid was used as catalyst for the reduction of molecular oxygen in acidic and alkaline media, the relevant cathode reaction in fuel cells. In alkaline medium, the nanohybrid exhibits excellent activity with a dominant 4e(-) reduction of O2 and low overpotential requirement compared to previously reported nano-gold materials. This property is linked to its capability...

the effect of mechanical activation on structural changes and kinetics of carbothermic reduction of hematite with graphite was studied in this research. hematite powder mixture with graphite (with stoichiometry ratio c/o=1) was milled for the time periods of zero to 50 hours, and the structural changes were studied using x ray diffraction (xrd). the effect of mechanical activation on the kineti...

Surface self-reconstruction via incorporating an amorphous structure on the surface of a catalyst can induce abundant defects and unsaturated sites for enhanced hydrogen evolution reaction (HER) activity. Herein, electrochemical activation method is proposed to reconstruct Cu-Fe3O4 catalyst. Following “dissolution–redeposition” path, defective FeOOH formed under potential stimulation precursor ...

Metal tellurides attract recent attention because of their promising applications as effective catalysts for the oxygen evolution reaction (OER). However, inappropriate adsorption energy between OER intermediates and telluride leads to an unsatisfactory electrocatalytic intrinsic activity. Herein, we adopt a unique in-situ cathodic electrochemical activation process facilitate surface self-reco...

The mechanism whereby structural modification on the mesoscale order (10–100 ?m) improves electrochemical performance of anode-supported solid oxide fuel cells (SOFCs) is elucidated. After preparing two types SOFC having different electrode–electrolyte interfacial areas, we carry out their analyses and characterization. Next, develop a two-dimensional (2D) numerical model in which structures ar...

This article has been written for students and teachers of the science technology low-temperature fuel cells, as well scientists engineers actively involved in research development this area. It offers first an analysis cell electrocatalytic processes, identifying a common pattern mechanisms these processes which serves basis universal expression describing non-linear V vs log J dependences obs...

Metastable 1T? MoTe2 has attracted much attention as a cost-effective electrocatalyst for hydrogen evolution reaction (HER) in recent years. However, few studies were done over common stable 2H phase because it often exhibits inferior performance. Herein, with S-doped Te vacancies been synthesized by one-step telluride conversion of 1T MoS2 at 700°C under Ar/H2 atmosphere. It is demonstrated th...