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Photochemical Production of Hydrogen from Alkaline Solution Containing Polysulfide Dyes Sang Gi Lee*, Jae-Hyun Kim, Sangwha Lee *~"and Ho-ln Lee' School of Chemical Engineering, Seoul National University, Seoul 151-744, Korea *LG Chemical Ltd., Research Park, Daejeon 305-380, Korea **Department of Chemical Engineering~ Kyungwon University, Kyonggbdo 461-701, Korea (Received 3 September 2001 . accepted 5 October 200[)

Abstract-Efficient hydrogen production was achieved by. irradiating ~lutions containing polysulfide dyes as a photoabv~rber. In the presence of poIysulfide only, considerable amount of hydrogen was initially.' e'~,ol~,edand lbl|owed t,3, the rapid decrease of the evolution rate. On the contrary, in the co-presence of NiO,(x

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