引用本文:
张敏, 金振声, 王守斌, 张顺利, 张治军. 在Pd/TiO2上CO的光催化增强效应[J]. 物理化学学报,
2003, 19(02): 100-104.
doi:
10.3866/PKU.WHXB20030202
Citation: Zhang Min, Jin Zhen-Sheng, Wang Shou-Bin, Zhang Shun-Li, Zhang Zhi-Jun. The Photocatalytic Enhancement Effect of CO on Pd/TiO2[J]. Acta Physico-Chimica Sinica, 2003, 19(02): 100-104. doi: 10.3866/PKU.WHXB20030202
Citation: Zhang Min, Jin Zhen-Sheng, Wang Shou-Bin, Zhang Shun-Li, Zhang Zhi-Jun. The Photocatalytic Enhancement Effect of CO on Pd/TiO2[J]. Acta Physico-Chimica Sinica, 2003, 19(02): 100-104. doi: 10.3866/PKU.WHXB20030202
在Pd/TiO2上CO的光催化增强效应
摘要:
在Pd(2％)/TiO2上CO催化氧化的研究中发现：室温下， 以黑光灯（λ=365 nm）照时， CO的氧化活性比暗态显著提高，产生了明显的光催化增强效应（两者速率常数比约为15）.但在TiO2上，无论暗态还是黑光灯（λ=365 nm）照，均无CO氧化反应发生.这可能是由于氧分子解离吸附时的键能减弱，使Pd表面氧原子（或O－）浓度增加和氧原子的溢流（oxygen spillover）两种效应结合产生的.
English
The Photocatalytic Enhancement Effect of CO on Pd/TiO2
Abstract:
The photocatalytic oxidation of CO on Pd(2％)/TiO2 was investigated. It was found that CO oxidation activity on Pd/TiO2 was greatly enhanced if illuminated with UV light(λ=365 nm) as compared with that in the dark(the ratio of the above two rate constants is ca. 15). But on bare TiO2 no CO oxidation reaction was observed both in the dark and under UV light illumination. The photocatalytic enhancement of CO on Pd/TiO2 could be elucidated by the increase of surface concentration of oxygen atoms (or O－) on Pd and the spillover of oxygen atoms from Pd to TiO2.
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