| 刘启宪,唐小苏,段言康,宋忠贤,宁平,张秋林.不同沉淀剂对Co3O4催化剂催化分解N2O活性的影响[J].分子催化,2016,30(4):363-371 |
| 不同沉淀剂对Co3O4催化剂催化分解N2O活性的影响 |
| Effects of precipitations on the catalytic activity of Co3O4 catalysts for the N2O decomposition |
| 投稿时间：2016-06-30 修订日期：2016-08-24 |
| DOI： |
| 中文关键词: N2O催化分解 沉淀剂 Co3O4 |
| 英文关键词:The catalytic decomposition of N2O Precipitant Co3O4 |
| 基金项目:国家自然科学基金 |
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| 摘要点击次数: 1081 |
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| 中文摘要: |
| 摘要：采用了不同沉淀剂（K2CO3、Na2CO3、NaOH、NaHCO3）制备了一系列Co3O4 氧化物催化剂。通过XRD、XPS、BET、H2-TPR、O2-TPD 表征手段，探究了催化剂物相结构和氧化还原性能对N2O催化分解性能的影响。研究表明，以K2CO3为沉淀剂制备的Co3O4催化剂具有优越的氧化还原性能。此外，较低结晶度有助于提高催化剂的催化性能,催化剂表面物种与其沉淀剂相关：丰富的表面Co物种促进催化活性,较多氧空位有利于催化剂表面的电子传递和氧气的脱附。以K2CO3为沉淀剂制备的Co3O4催化剂表现出最佳的N2O催化分解活性，在450癈达到90%以上的转化率。 |
| 英文摘要: |
| Abstract: A series of Co3O4 catalysts with different precipitants (K2CO3、Na2CO3、NaOH and NaHCO3) were synthesized by the precipitation method. Relevant characterization was conducted employing XRD, BET, XPS, H2-TPR and O2-TPD. The influence of phase structure and redox properties on catalytic activity of N2O was studied. The analytical results indicated that the Co3O4 catalysts prepared by K2CO3 possessed excellent redox properties, lower crystallinity, abundant Co species, which could contribute to the catalytic activity. Besides, the rich oxygen vacancy was beneficial for the electron transfer and the O2 desorption, resulting in the improvement of catalytic activity. The Co3O4 catalysts prepared by K2CO3 exhibited the best catalytic activity and more than 90% N2O conversion was achieved at 450癈. |
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