Synthesis of RuO 2 nanowires from Ru thin films by atmospheric pressure micro-post-discharge

Abstract

Oxidation by a micro-post-discharge at atmospheric pressure of thin films of ruthenium deposited on fused silica by pressure-modulated magnetron sputtering is studied. Single-crystalline RuO 2 nanowires are obtained for the first time with a diffusion process over large areas. Nanowires grow typically at temperatures below 550-600 K, provided the level of stress is high enough to fragment grains in sub-grains with sizes between 30 and 50 nm. Because of the alternation of dense and porous layers forming the coating, inward diffusion of vacancies leads to no patent Kirkendall's effect, pores being distributed over the whole coating thickness and not mainly at the interface with the substrate. The centre of the treatment being heated at temperatures higher than 900 K, gaseous RuO 4 is formed, leading to an evaporated area. At its edge, a ring of microcrystals is formed, likely by a CVD mechanism.

Construction of Zn-doped RuO2 nanowires for efficient and stable water oxidation in acidic media

“…In addition, the py-RuO 2 :Zn nanowire arrays could readily be fabricated on other substrates, such as carbon fiber paper (CFP) and fluorine-doped tin oxide (FTO) glass (Supplementary Fig. 8 ), highlighting the versatility of one-step pyrolysis catalyst fabrication strategy developed herein 50 – 54 . But both CFP and FTO supported py-RuO 2 :Zn catalyst shows a relatively lower OER activity for acidic OER (Supplementary Fig.…”