The micrograph and elemental compositions of Pt/MgO/CNT catalysts were characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively. The electrocatalytic properties of the Pt/ MgO/CNT catalyst for ethanol oxidation have been investigated by cyclic voltammetry in 1.0 mol L -1 CH 3 -CH 2 OH and 1.0 mol L -1 KOH aqueous solution. The effect of the content of MgO on the electrocatalytic activity of the Pt/MgO/CNT catalyst was also investigated. Under the same Pt loading mass and experimental conditions for ethanol oxidation, the Pt/MgO/CNT catalyst shows higher electrocatalytic activity than the Pt/ CNT catalyst. Additionally, the Pt/MgO/CNT catalyst possesses a good antipoisoning ability.

Two novel titanium alloys, Ti-10V-2Cr-3Al and Ti-10V-1Fe-3Al (wt%), have been designed, fabricated, and tested for their intended stress-induced martensitic (SIM) transformation behavior. The results show that for Ti-10V-1Fe-3Al the triggering stress for SIM transformation is independently affected by the b domain size and b phase stability, when the value of the molybdenum equivalent is higher than *9. The triggering stress was well predicted using the equations derived separately for the commercial Ti-10V-2Fe-3Al alloy. For samples containing b with a lower molybdenum equivalence value, pre-existing thermal martensite is also present and this was found to have an obstructive effect on SIM transformation. In Ti-10V-2Cr-3Al, the low diffusion speed of Cr caused local gradients in the Cr level for many heat treatments leading even to martensite free zones near former b regions.

Dopamine, a sustainable and cheap raw material, was selected as the carbon and nitrogen sources to synthesize hollow nitrogen‐doped carbon microspheres (HNCMS). The obtained HNCMS were used as a non‐noble‐metal electrocatalyst for oxygen reduction in alkaline solution and show high electrocatalytic activity, excellent long‐term stability, and tolerance to crossover effect of methanol.

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Polyaniline (PANI) films were deposited on titanium (Ti) electrode in a bath containing 0.3 mol L À1 aniline and 1 mol L À1 HNO 3 by pulse potentiostatic method (PPM) and potentiostatic method (PM). The chronoamperograms during aniline polymerization were recorded, and the morphologies of PANI films prepared with different polymerization periods were examined under scanning electron microscope. The difference between the processes of PANI films growth was studied. The growth processes of PANI films prepared by PPM and PM are divided into two stages. For both PPM and PM, the first stage corresponds to the formation of a compact granular PANI layer on the surface of Ti electrode. The second stage corresponds to further growth of PANI film on the surface of the compact granular PANI film. However, the PANI films prepared by PPM and PM show different morphologies in this stage. In addition, the electrochemical properties of the PANI films prepared by PPM and PM are obviously different.