ملخص: Photocatalytic hydrogen production induced under illumination using a new oxide CuMnO2 has been studied. The applied catalyst was without noble metal. The hydrogen was generated from aqueous solution containing either S2- or SO32-. The conduction band of CuMnO2, with a value of -0.88 V/SCE, allows a spontaneous hydrogen formation. The highest hydrogen evolution rate was 0.95 x 10-2 ml mg-1 h-1 on the crednerite CuMnO2-E obtained by exchange reaction with SO32- as hole scavenger. When S2- was used, the hydrogen production reaches a saturation attributed to the competitive reduction of yellow polysulfides Sn2- as well as their strong light absorption in the visible region. There was no photoactivity observed below pH 12.

لغة: إنجليزية