ADSORPTION OF NA+ ONTO GAMMA-ALUMINA STUDIED BY SOLID-STATE NA-23 AND AL-27 NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY
文献类型：期刊论文
| 作者 | YE, CH; DENG, F; DU, YR; KONG, YH |
| 刊名 | SOLID STATE NUCLEAR MAGNETIC RESONANCE
 |
| 出版日期 | 1993-12-01 |
| 卷号 | 2期号:6页码:317-324 |
| 关键词 | Adsorption Gamma-alumina Na-23 Mas H-1-al-27 Cp-mas Na-23 Quadrupolar Nutation Nmr |
| ISSN号 | 0926-2040 |
| 文献子类 | Article |
| 英文摘要 | The adsorption of Na+ on gamma-alumina surfaces at four coverages of Na2CO3 [5, 10, 15 and 20% (w/w)] was characterized by solid-state Na-23 and Al-27 nuclear magnetic resonance (NMR) spectroscopy. The experimental results suggest that two distinct adsorbed species are present on the alumina surface: surface species and surface salts. At the lower coverages of Na2CO3 (5 and 10%), the surface species is predominant, in which the Na+ cations are associated with the oxygen atoms of gamma-alumina. Increasing the loading level to 15% results in the appearance of a second adsorbed species that is attributed to the surface salt, Na2CO3, deposited on the solid surface. Further adsorption of Na2CO3 leads to an increase in the amount of surface salt while the amount of surface species remains unchanged. H-1-Al-27 Cross-polarization magic angle spinning (CP-MAS) experiments give the evidence that some Na+ cations in the form of surface species are coordinated with the Bronsted acid sites of gamma-alumina. This may be the main driving force that improves appreciably the catalytic efficiency of an Na2CO3-Al2O3 catalyst. |
| WOS关键词 | INTEGER QUADRUPOLAR NUCLEI ; HYDRODESULFURIZATION CATALYSTS ; DOUBLE-ROTOR ; NMR ; NUTATION ; ZEOLITE ; FRESH ; IONS |
| WOS研究方向 | Chemistry ; Physics ; Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:A1993MQ09500003 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/12547]  |
| 专题 | 中国科学院武汉物理与数学研究所 |
| 作者单位 | 1.CHINESE ACAD SCI,WUHAN INST PHYS,NUCL MAGNET RESONANCE & ATOM & MOLEC PHYS LAB,WUHAN 430071,PEOPLES R CHINA 2.HUBEI INST CHEM,WUSHAN 430074,PEOPLES R CHINA |
| 推荐引用方式 GB/T 7714 | YE, CH,DENG, F,DU, YR,et al. ADSORPTION OF NA+ ONTO GAMMA-ALUMINA STUDIED BY SOLID-STATE NA-23 AND AL-27 NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY[J]. SOLID STATE NUCLEAR MAGNETIC RESONANCE,1993,2(6):317-324. |
| APA | YE, CH,DENG, F,DU, YR,&KONG, YH.(1993).ADSORPTION OF NA+ ONTO GAMMA-ALUMINA STUDIED BY SOLID-STATE NA-23 AND AL-27 NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY.SOLID STATE NUCLEAR MAGNETIC RESONANCE,2(6),317-324. |
| MLA | YE, CH,et al."ADSORPTION OF NA+ ONTO GAMMA-ALUMINA STUDIED BY SOLID-STATE NA-23 AND AL-27 NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY".SOLID STATE NUCLEAR MAGNETIC RESONANCE 2.6(1993):317-324. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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