On the catalytic effect of Pd(s) on the reduction of with H₂ in aqueous solution

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• 作者：Sara Nilsson ; Mats Jonsson
• 关键词：Liquid alloys and liquid metals ; X-ray diffraction
• 刊名：Journal of Nuclear Materials
• 出版年：2008
• 出版时间：29 February 2008
• 年：2008
• 卷：374
• 期：1-2
• 页码：290-292
• 全文大小：109 K

文摘

The catalytic effect of Pd(s) (as a model for noble metal particles) on the reduction of by H₂ has been studied experimentally. The experiments were performed in aqueous solution in an autoclave. The aqueous solutions were pressurized with H₂ or N₂ and the concentration was measured as a function of time. The experiments clearly show that Pd catalyzes the reaction between and H₂. The rate constant of the reaction was found to be close to diffusion controlled and independent of the H₂ pressure in the range 1.5–40 bar. The effect of a catalyzed reduction of U(VI) to U(IV) in the solid phase is also discussed.