In situ synthesis of TiH₂ layer on metallic titanium foil through gaseous hydrogen free acid-hydrothermal method

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• 作者：Na Ren ; Guancong Wang ; Hong Liu ; Tadashi Ohachi
• 关键词：A. Hydrides ; B. Chemical synthesis ; C. X-ray diffraction ; D. Energy storage
• 刊名：Materials Research Bulletin
• 出版年：February, 2014
• 年：2014
• 卷：50
• 期：Complete
• 页码：379-384
• 全文大小：1447 K

文摘

A novel strategy for synthesis of TiH₂ layer on surface of metallic titanium by using an acid-hydrothermal method was proposed. During the synthesis process, no any elemental hydrogen was involved. X-ray powder diffraction, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and scanning electron microscopy results confirmed that a TiH₂ layer of 20 渭m thickness on a Ti foil surface can be formed in situ by an interface reaction of metallic titanium with sulfuric acid solution, hydrochloric acid, or phosphoric acid, which is a hydrogen self-storage process. By tuning reaction parameters, for example, concentration of acid, composition and morphology of TiH₂-Ti hybrid materials can be adjusted. The TiH₂ layer on a metallic titanium surface can be decompounded completely heated below 400 掳C. This convenient, safe and low-cost method is a promising gaseous hydrogen free approach for the synthesis of hydride-based hydrogen storage materials.