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| 不同碱辅助的沉积沉淀法对三效催化剂稳定性的影响 | |
| 引用本文： | 范君,江雪,焦毅,陈宇圣,王健礼,陈耀强. 不同碱辅助的沉积沉淀法对三效催化剂稳定性的影响[J]. 无机材料学报, 2021, 36(6): 659-664. DOI: 10.15541/jim20200357 |
| 作者姓名： | 范君 江雪 焦毅 陈宇圣 王健礼 陈耀强 |
| 作者单位： | 1.四川大学 化学学院, 成都 610064 2.四川大学 新能源与低碳技术研究院, 成都 610064 |
| 摘 要： | 老化处理会导致三效催化剂(TWCs)严重失活,因此提高催化剂的耐久性能是TWCs设计的目标.本工作采用不同碱辅助的沉积沉淀法,即尿素辅助沉积沉淀法和氨水辅助沉积沉淀法制备了Pt/Ce0.4Zr0.5La0.05Pr0.05O2(Pt/CZ)三效催化剂,分析了不同碱对催化剂物理化学性质、催化活性和耐久性的影响.结果表明,... |
| 关 键 词： | 三效催化剂 沉积沉淀 碱辅助 稳定性 |
| 收稿时间： | 2020-06-29 |
| 修稿时间： | 2020-09-17 |
Effect of Different Alkali-assisted Deposition Precipitation Methods on the Durability of Three-way Catalysts |
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| FAN Jun,JIANG Xue,JIAO Yi,CHEN Yusheng,WANG Jianli,CHEN Yaoqiang. Effect of Different Alkali-assisted Deposition Precipitation Methods on the Durability of Three-way Catalysts[J]. Journal of Inorganic Materials, 2021, 36(6): 659-664. DOI: 10.15541/jim20200357 | |
| Authors: | FAN Jun JIANG Xue JIAO Yi CHEN Yusheng WANG Jianli CHEN Yaoqiang |
| Affiliation: | 1. College of Chemistry, Sichuan University, Chengdu 610064, China 2. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, China |
| Abstract: | The aging treatment always brings about severe deactivation of three-way catalysts (TWCs) so that improving the durability is one goal of TWCs design. In this work, Pt/Ce0.4Zr0.5La0.05Pr0.05O2 (Pt/CZ) TWCs were prepared by two different alkali-assisted deposition precipitation method, urea or ammonia. The effects of different alkali-assisted on the physicochemical properties, catalytic activity and durability were analyzed. It was found that the Pt/CZ catalyst prepared by urea-assisted deposition precipitation method (UDP) had poor aging resistance but the Pt/CZ catalyst prepared by ammonia-assisted (ADP) showed better anti-aging ability. Based on the results of XRD, CO adsorption, XPS and H2-TPR, comparatively larger particle size of Pt species and stronger interaction for ADP make it more difficult to sinter together during the aging treatment, which is favorable for maintaining catalytic activity. Therefore, the ADP catalyst shows a bright future for industrialization. |
| Keywords: | three-way catalysts deposition precipitation alkali-assisted durability |
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