Comparative study on the effect of H2 pre-adsorption on CO oxidation in O2-poor atmosphere over Au/TiO2 and TiO2: Temperature programmed surface reaction by a multiplexed mass spectrometer testing
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- 作者：Ruiru Si ; Junfeng Liu ; Yujuan Zhang ; Xun Chen ; Wenxin Dai ; daiwenxin@fzu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Xianzhi Fu
- 关键词：Carbon monoxide oxidation ; Titanium dioxide supported gold catalyst ; Titanium&ndash ; bonded hydroxyl species ; Hydrogen spillover ; Temperature programmed surface reaction
- 刊名：Applied Surface Science
- 出版年：2016
- 出版时间：30 November 2016
- 年：2016
- 卷：387
- 期：Complete
- 页码：1062-1071
- 全文大小：2868 K
文摘
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A TPSR method was designed to study the effect of H2 on CO oxidation over Au/TiO2.
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H2 promoted CO oxidation over Au/TiO2 by forming the Ti-bonded hydroxyl species.
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H adatoms spillover from Au to TiO2 formed the new Ti-bonded hydroxyl species.
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H2 directly adsorbed at TiO2 consumed the Ti-bonded hydroxyl species.
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H2 played a role on CO oxidation similar to H2O over Au/TiO2 but different over TiO2.