2007
DOI: 10.1007/s10562-007-9064-2
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Pd-based bimetallic catalysts prepared by replacement reactions

Abstract: Several Pd-based bimetallic catalysts, Pd/Co, Pd/Ni and Pd/Cu, were synthesized by replacement reactions. The catalysts were characterized by XRD and CO chemisorption and their catalytic properties were evaluated using cyclohexene self-hydrogenation. The results suggest that the high catalytic activity of Pd/Ni is most likely due to the monolayer-dispersion of Pd on the Ni surface. The results also suggest that Pd is monolayer-dispersed on the Co surface in Pd/Co, whereas Pd forms surface alloy or solid soluti… Show more

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Cited by 14 publications
(9 citation statements)
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“…Moreover, the unique physical and chemical properties can be introduced by adding a small amount of second elements such as Pd, Pt, Ir, or Ru to Ni catalysts. These elements are dispersed on the surface of Ni to form bimetallic catalysts and the interactions at the metal–metal interface lead to the improved performance of Ni catalysts [ 18 , 19 , 20 , 21 ]. Thus, a promising endeavor is to explore a combination of noble metal, e.g., Pt and Ni NPs to enhance the catalytic activity.…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, the unique physical and chemical properties can be introduced by adding a small amount of second elements such as Pd, Pt, Ir, or Ru to Ni catalysts. These elements are dispersed on the surface of Ni to form bimetallic catalysts and the interactions at the metal–metal interface lead to the improved performance of Ni catalysts [ 18 , 19 , 20 , 21 ]. Thus, a promising endeavor is to explore a combination of noble metal, e.g., Pt and Ni NPs to enhance the catalytic activity.…”
Section: Introductionmentioning
confidence: 99%
“…The approach based on galvanic replacement reaction (GRR) provides a very facile and effective method for generating bimetallic nanoparticle with noble metal-rich surface . By using GRR, Wang et al prepared several Pd-based bimetallic Pd/M (M = Co, Ni, or Cu) catalysts, which delivered enhanced catalytic activity in cyclohexen self-hydrogenation due to the monolayer-dispersion of Pd on the non-noble metal surface . Soon afterward, Wu et al reported the synthesis of Pd/Ni–B bimetallic nanoparticle catalyst by GRR, which showed better catalytic activity and stability in the hydrodechlorination of chlorobenzene compared to those over the reference catalysts .…”
Section: Introductionmentioning
confidence: 99%
“…Soon afterward, Wu et al reported the synthesis of Pd/Ni–B bimetallic nanoparticle catalyst by GRR, which showed better catalytic activity and stability in the hydrodechlorination of chlorobenzene compared to those over the reference catalysts . Despite effectiveness, the non-noble metals in the above-mentioned Pd/M systems were only used as inert “support” which were inactive for the performed catalytic reactions. , Consequently, the possible synergetic properties between two transition metals was still not clearly illustrated. In the present work, highly dispersed Pd on Co–B amorphous alloy was prepared by GRR.…”
Section: Introductionmentioning
confidence: 99%
“…Hence, this paper discusses the first attempt made towards the evaluation of PEDOT as suitable catalyst supports for Pd where the nanostructured Pd catalyst has been prepared by electrodeposition of Cu followed by galvanic replacement of Pd. It is well known that Pd can galvanically displace Cu 22,23 . Motivated by the preceding studies, we planned a strategy of initially depositing Cu on PEDOT matrix and then impregnating Pd NPs by galvanic displacement phenomenon between Pd ions and Cu.…”
Section: Introductionmentioning
confidence: 99%