Preparation of PdCu Alloy Nanocatalysts for Nitrate Hydrogenation and Carbon Monoxide Oxidation
Preparation of PdCu Alloy Nanocatalysts for Nitrate Hydrogenation and Carbon Monoxide Oxidation
复制标题
PdCu合金纳米催化剂的制备用于硝酸盐加氢和一氧化碳氧化
DOI：
10.3390/catal6070096
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发表时间：
2016-07-01
期刊：
影响因子：
3.9
通讯作者：
Zhong, Chuan-Jian
中科院分区：
文献类型：
--
作者：
Cai, Fan;Yang, Lefu;Zhong, Chuan-Jian
Pd与Cu的合金化对于反硝化反应和CO氧化反应等催化反应很重要，但对催化剂制备及其与催化剂活性和选择性的关系的了解仍然难以捉摸。在此，我们报道了采用不同方法制备PdCu合金纳米催化剂以及催化剂在催化脱氮反应和CO氧化反应中的催化性能的研究结果。采用传统的干浸渍法和基于配体封端的湿化学合成法制备PdCu合金纳米催化剂，并随后进行热化学活化。合金特性取决于双金属成分。 Pd/Cu 比例为 50:50 的 PdCu/Al2O3 对催化脱氮反应表现出优化的加氢活性。 PdCu 催化剂的催化活性高度依赖于载体，观察到使用具有高储氧能力的 TiO2 和 CeO2 载体对 CO 氧化反应的催化活性增强就证明了这一点。还讨论了结果对合金纳米催化剂制备细化的影响。
Alloying Pd with Cu is important for catalytic reactions such as denitrification reaction and CO oxidation reaction, but understanding of the catalyst preparation and its correlation with the catalyst's activity and selectivity remains elusive. Herein, we report the results of investigations of the preparation of PdCu alloy nanocatalysts using different methods and the catalytic properties of the catalysts in catalytic denitrification reaction and CO oxidation reaction. PdCu alloy nanocatalysts were prepared by conventional dry impregnation method and ligand-capping based wet chemical synthesis method, and subsequent thermochemical activation as well. The alloying characteristics depend on the bimetallic composition. PdCu/Al2O3 with a Pd/Cu ratio of 50:50 was shown to exhibit an optimized hydrogenation activity for the catalytic denitrification reaction. The catalytic activity of the PdCu catalysts was shown to be highly dependent on the support, as evidenced by the observation of an enhanced catalytic activity for CO oxidation reaction using TiO2 and CeO2 supports with high oxygen storage capacity. Implications of the results to the refinement of the preparation of the alloy nanocatalysts are also discussed.