| ZrO2催化剂上吸附甲酸的TPD和IR研究 |
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| 引用本文： | 徐柏庆,梁娟,郑禄彬,山口力,田部浩三.ZrO2催化剂上吸附甲酸的TPD和IR研究[J].物理化学学报,1991,7(6):712-715. |
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| 作者姓名： | 徐柏庆 梁娟 郑禄彬 山口力 田部浩三 |
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| 作者单位： | Dalian Institute of Chemical Physics, Dalian 116023; a: Department of Chemistry, Faculty of Science, Hokkaido University, Japan |
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| 基金项目： | 国家自然科学基金(青年基金) |
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| 摘 要： | 众多的研究表明甲酸在氧化物催化剂上的吸附分解与催化剂的表面酸碱性质有关。研究吸附相甲酸物种的变化表明甲酸分解反应的选择性除受温度影响外,还与甲酸的表面覆盖度有关。Z_rO_2表现为较典型的弱酸弱碱双功能性催化剂。最近我们的研究表明Z_rO_2表面存在表面键诱导酸-碱相互作用,它的酸-碱双功能催化作用在烷基胺分解转化为腈的反应中得到了较好地体现。本文报导Z_rO_2催化剂上吸附甲酸的程序升温脱附(TPD)和红外光谱(IR)研究结果。
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| 关 键 词： | 氧化锆 甲酸 TPD IR 吸附 |
| 收稿时间： | 1990-05-23 |
| 修稿时间： | 1991-01-14 |
TPD AND IR STUDIES ON THE DECOMPOSITION OF FORMIC ACID ADSORBED ON ZrO_2 |
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| Xu Boqing Liang Juan Zheng Lubin Yamaguchi Tsutomua Tanabe Kozoa.TPD AND IR STUDIES ON THE DECOMPOSITION OF FORMIC ACID ADSORBED ON ZrO_2[J].Acta Physico-Chimica Sinica,1991,7(6):712-715. |
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| Authors: | Xu Boqing Liang Juan Zheng Lubin Yamaguchi Tsutomua Tanabe Kozoa |
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| Institution: | Dalian Institute of Chemical Physics, Dalian 116023; a: Department of Chemistry, Faculty of Science, Hokkaido University, Japan |
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| Abstract: | Decomposition of formic acid adsorbed on ZrO_2 catalyst was studied by means of TPD and IR spectroscopy. Two peaks of H_2O were observed at about 423 and 623 K in the TPD process. Between the two peaks of H_2O, evolution of CO appeared and gave a peak at about 563 K. IR study showed that the adsorption of formic acid led to the formation of a formate(Ⅰ)and a dimer species(Ⅱ)of the acid on the surface. At 373-473 K, Ⅱ was decomposed to H_2O which produced the first H_2O peak and some new surface formate species (I). At temperature higher than 473 K, the formated species (I), either formed in the initial adsorption of formic acid or produced from II, were decomposed further to CO and surface hydroxyl groups. The main part of the surface hydroxyl groups were eliminated at above 573 K, which produced the second H_2O peak. |
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| Keywords: | Zirconium dioxide Formic acid TPD IR Adsorption |
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