Fe/TiO_2/堇青石催化KBH_4水解析氢性能研究

Study on catalytic hydrolysis of kalium borohydride using Fe/TiO_2/Cordierite

以涂敷二氧化钛(TiO2)的蜂窝状堇青石(2MgO2.A l2O3.S iO2)为载体,用水热合成法负载铁盐,经500℃焙烧及硼氢化钾(KBH4)浸渍后,合成了Fe/TiO2/堇青石催化剂.实验研究表明,经KHB4浸渍后的催化剂催化析氢性能明显改善,常温下0.45g该催化剂于质量浓度约为10%的KBH4溶液中催化析氢速率可达30m l/m in,产率接近100%.XRD及XPS测试结果表明,催化剂经KHB4浸渍后,氧化态铁被还原为单质铁,从而使催化剂具有优良的催化析氢性能.

Fe/TiO2/ cordierite catalyst was synthesized with hydrothermal synthesis, then baking at 500℃ and soaking TiO2-coated cordierite as a carrier, supporting iron by in kalium borohydride （KBH4）. Experimental research shows that its performance of hydrogen evolution has been improved obviously after soaking in KBH4, the maximum H2 gas generation rate as a function of 0.45g catalyst in 10% KBH4 solution is 30 ml/min and the generation efficiency is approximate 100% at room temperature. X-ray diffraction（XRD） and X-ray photoelectron spectroscopy （XPS） results show that ferric oxide was deoxidized in the course of soaking in KBH4, so the catalyst has good performance of hydrogen evolution.