Synthesis of Co3O4 catalysts with different morphologies and their excellent catalytic performance for soot combustion†

IF 4.4 3区 化学 Q2 CHEMISTRY, PHYSICAL
Xinyu Zhang , Chunlei Zhang , Siyu Gao , Xinyu Chen , Siyuan Chen , Shengran Zhou , Di Yu , Lanyi Wang , Xiaoqiang Fan , Xuehua Yu , Zhen Zhao
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引用次数: 0

Abstract

Soot particles released from diesel engines have resulted in significant environmental pollution and have been widely recognized as an important factor for haze weather conditions. Soot emissions can be effectively mitigated using catalytic purification technologies, which necessitate the development of high-efficiency catalysts. Co3O4 catalysts with flower-, rod-, urchin-, sheet-, and cube-like morphologies were prepared via a hydrothermal method and were analyzed using characterization methods including XRD, SEM, and H2-TPR. Compared to the other synthesized catalysts, the urchin-like (Co3O4-U) catalyst exhibited better redox ability, stronger oxygen adsorption and activation ability, and the ability to convert NO into NO2. Therefore, the Co3O4-U catalyst displayed the best catalytic activity for soot combustion, with T10, T50, and T90 values of 274 °C, 327 °C, and 359 °C, respectively. Moreover, based on the characterization and catalytic performance results, the reaction mechanisms for the Co3O4-U catalyst were proposed. The Co3O4-U catalyst possesses advantages such as a simple preparation process, economic feasibility, and excellent catalytic performance.

Abstract Image

不同形态Co3O4催化剂的合成及其对煤烟燃烧的优异催化性能
柴油机排放的烟尘颗粒造成了严重的环境污染,已被广泛认为是造成雾霾天气的重要因素。利用催化净化技术可以有效地减少煤烟排放,这就需要开发高效催化剂。采用水热法制备了具有花状、棒状、海胆状、片状和立方体形态的Co3O4催化剂,并采用XRD、SEM和H2-TPR等表征方法对催化剂进行了分析。与其他合成的催化剂相比,海胆样(Co3O4-U)催化剂表现出更好的氧化还原能力,更强的氧吸附和活化能力,以及将NO转化为NO2的能力。因此,Co3O4-U催化剂对煤烟燃烧表现出最好的催化活性,其T10、T50和T90分别为274℃、327℃和359℃。在表征和催化性能的基础上,提出了Co3O4-U催化剂的反应机理。Co3O4-U催化剂具有制备工艺简单、经济可行、催化性能优异等优点。
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来源期刊
Catalysis Science & Technology
Catalysis Science & Technology CHEMISTRY, PHYSICAL-
CiteScore
8.70
自引率
6.00%
发文量
587
审稿时长
1.5 months
期刊介绍: A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis. Editor-in-chief: Bert Weckhuysen Impact factor: 5.0 Time to first decision (peer reviewed only): 31 days
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