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Bimetallic Nanostructured Catalysts Prepared by Laser Electrodispersion: Structure and Activity in Redox Reactions
ChemCatChem ( IF 3.8 ) Pub Date : 2020-05-25 , DOI: 10.1002/cctc.202000501 A. A. Bryzhin 1 , E. V. Golubina 1 , K. I. Maslakov 1 , E. S. Lokteva 1 , I. G. Tarkhanova 1 , S. A. Gurevich 2 , D. A. Yavsin 2 , T. N. Rostovshchikova 1
ChemCatChem ( IF 3.8 ) Pub Date : 2020-05-25 , DOI: 10.1002/cctc.202000501 A. A. Bryzhin 1 , E. V. Golubina 1 , K. I. Maslakov 1 , E. S. Lokteva 1 , I. G. Tarkhanova 1 , S. A. Gurevich 2 , D. A. Yavsin 2 , T. N. Rostovshchikova 1
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One‐stage size‐selective method of laser electrodispersion (LED) was used to produce nanostructured NiPd, NiMo and NiW coatings on the surface of alumina, HOPG and Sibunit for the catalytic application. The deposition of nanoparticles produced by LED of bimetallic targets from alloyed or pressed metal powders provides the uniform distribution of both metals on the outer support surface; the metal ratio is similar to that in the original target. The catalytic behaviour of produced “core‐shell” catalysts in comparison with monometallic analogues was tested in two model reactions: the CO oxidation with oxygen on NiPd catalysts supported on alumina and Sibunit; and thiophene oxidation with hydrogen peroxide on NiMo and NiW alumina supported catalysts. Novel LED bimetallic catalysts with extremely low metal content (0.005 %) were superior in terms of activity and stability to monometallic ones and the catalysts obtained by “wet” chemistry methods. Improved catalytic properties of bimetallic LED catalysts are related to the high density of single nanoparticles and the formation of active metal‐oxide interfaces on the support surface.
中文翻译：
激光电分散制备双金属纳米结构催化剂：氧化还原反应的结构和活性
激光电分散（LED）的一级尺寸选择方法用于在氧化铝，HOPG和Sibunit的表面上制备用于催化应用的纳米结构NiPd，NiMo和NiW涂层。由双金属靶材的LED从合金化或压制的金属粉末中产生的纳米颗粒的沉积提供了两种金属在外支撑表面上的均匀分布。金属比例与原始目标相似。在两个模型反应中测试了生产的“核壳”催化剂与单金属类似物的催化行为：在氧化铝和Sibunit上负载的NiPd催化剂上用氧气进行CO氧化；在NiMo和NiW氧化铝负载的催化剂上用过氧化氢氧化噻吩。金属含量极低的新型LED双金属催化剂（0。005％）在活性和稳定性方面均优于单金属催化剂和通过“湿法”化学方法获得的催化剂。双金属LED催化剂改善的催化性能与单个纳米颗粒的高密度以及在载体表面上形成活性金属-氧化物界面有关。
更新日期：2020-05-25
中文翻译：
激光电分散制备双金属纳米结构催化剂：氧化还原反应的结构和活性
激光电分散（LED）的一级尺寸选择方法用于在氧化铝，HOPG和Sibunit的表面上制备用于催化应用的纳米结构NiPd，NiMo和NiW涂层。由双金属靶材的LED从合金化或压制的金属粉末中产生的纳米颗粒的沉积提供了两种金属在外支撑表面上的均匀分布。金属比例与原始目标相似。在两个模型反应中测试了生产的“核壳”催化剂与单金属类似物的催化行为：在氧化铝和Sibunit上负载的NiPd催化剂上用氧气进行CO氧化；在NiMo和NiW氧化铝负载的催化剂上用过氧化氢氧化噻吩。金属含量极低的新型LED双金属催化剂（0。005％）在活性和稳定性方面均优于单金属催化剂和通过“湿法”化学方法获得的催化剂。双金属LED催化剂改善的催化性能与单个纳米颗粒的高密度以及在载体表面上形成活性金属-氧化物界面有关。
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