引用本文:
刘旺, 王德军, 李铁津. CO3O4/SrTiO3光催化分解水制氢的研究[J]. 物理化学学报,
1987, 3(02): 123-128.
doi:
10.3866/PKU.WHXB19870204
Citation: Liu Wang, Wang Dejun, Li Tiejin. A STUDY OF HYDROGEN PRODUCTION BY PHOTOCATALYTIC DECOMPOSITION OF LIQUID WATER ON Co3O4/SrTiO3[J]. Acta Physico-Chimica Sinica, 1987, 3(02): 123-128. doi: 10.3866/PKU.WHXB19870204
Citation: Liu Wang, Wang Dejun, Li Tiejin. A STUDY OF HYDROGEN PRODUCTION BY PHOTOCATALYTIC DECOMPOSITION OF LIQUID WATER ON Co3O4/SrTiO3[J]. Acta Physico-Chimica Sinica, 1987, 3(02): 123-128. doi: 10.3866/PKU.WHXB19870204
CO3O4/SrTiO3光催化分解水制氢的研究
摘要:
本文报道了利用掺有Co_3O_4的SrTiO_3多晶粉末进行光催化分解水制氢的研究结果。其中着重考察了光催化剂的预处理和反应液OH~-浓度等因素对催化活性的影响; 同时利用表面光电压谱(SPV)技术和ESR对光催化剂的表面光-伏性质、电子性质进行了研究。并注意从SrTiO_3的能带结构考虑, 借助于表面态的概念, 对光催化机制进行了初步的探讨。
English
A STUDY OF HYDROGEN PRODUCTION BY PHOTOCATALYTIC DECOMPOSITION OF LIQUID WATER ON Co3O4/SrTiO3
Abstract:
This paper reports the results of a study devoted to the hydrogen production from liquid water on Co_3O_4/SrTiO_3 powders under UV irradiation. The results indi- cated that the photocatalysts behave rather actively in alkali solution. A strong con- centration dependence of OH~- for the rate of H_2 formation was observed. Reduction pretreatment of the photocatalysts by H_2 is unfavourable for the H_2 production, but an oxidation pretreatment by O_2 may improve remarkably the catalytic effi- ciency. By using SPV technique and ESR, it is found that near and above valence band of SrTiO_3 the photocatalysts have band-gap surface states, which may associate with surface cobalt ions. We believe that the surface states play a key role in the charge separation and transfer processes. Finally, a mechanism model is proposed.
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