促进剂对用于甲醇分解制氢的铜镍催化剂性能的影响

IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Express Pub Date : 2024-09-08 DOI:10.1088/2053-1591/ad74cd
Beidong Zhang, Yankun Jiang, Le Cong, Yexin Chen, Lunhong Chen and Zhengdong Yang
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引用次数: 0

摘要

利用发动机排出的热量分解甲醇以产生氢气,然后将氢气引入燃烧室,是实现节能减排的关键方法之一。在这一应用中,高效稳定的甲醇分解催化剂起着至关重要的作用。因此,我们采用分步浸渍法制备了使用 Zr、La、Mn 和 Mg 等促进剂改性的铜镍基催化剂。使用各种分析方法和表征技术对所开发的催化剂进行了测试。结果表明,Zr 的添加增强了活性成分的分散性,提高了催化剂的还原性。这反过来又提高了催化剂的活性和氢选择性。与原始催化剂相比,Zr 改性催化剂的产氢量平均提高了 12%。此外,Zr 改性催化剂在长期使用后表现出了极高的稳定性。La 可以提高催化剂的低温活性,但在高温下性能较差。促进剂 Mn 对催化剂的整体性能影响很小。相反,添加 Mg 作为促进剂会抑制活性成分的分散,从而对催化剂产生不利影响。
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Effect of promoters on the performance of CuNi catalysts for hydrogen production from methanol decomposition
Utilizing the exhaust heat from engines to decompose methanol for hydrogen production, and subsequently introducing this hydrogen into the combustion chamber, is one of the crucial approaches for achieving energy savings and emission reductions. The role of an efficient and stable catalyst for methanol decomposition is paramount in this application. Therefore, CuNi-based catalysts modified with promoters such as Zr, La, Mn, and Mg were prepared using a stepwise impregnation method. The developed catalysts were tested using various analytical methods and characterization techniques. The results indicate that the addition of the Zr enhances the dispersion of active components, improves the catalyst’s reducibility. This, in turn, enhances the catalyst’s activity and hydrogen selectivity. The hydrogen yield of the Zr modified catalyst increased by an average of 12% compared to the original catalyst. Furthermore, the Zr modified catalyst exhibits exceptional stability after prolonged use. La can enhance the low-temperature activity of the catalyst but performs poorly at high temperatures. The promoter Mn has a minimal impact on the overall performance of the catalyst. Conversely, the addition of Mg as a promoter inhibits the dispersion of active components, resulting in adverse effects on the catalyst.
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来源期刊
Materials Research Express
Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
4.50
自引率
4.30%
发文量
640
审稿时长
12 weeks
期刊介绍: A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.
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