화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.37, No.8, 1387-1393, August, 2020
DOI10.1007/s11814-020-0604-4  Export Citation
Composition-dependent catalytic activity of bimetallic PtPd dendrimer-encapsulated nanoparticles having an average size of 1.7 nm for hydrolytic dehydrogenation of ammonia borane
Youngwon Ju, and Joohoon Kim†
  • Department of Chemistry, Research Institute for Basic Sciences, KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Korea
E-mail:
We investigated composition-dependent catalytic activity of bimetallic PtPd dendrimer-encapsulated nanoparticles (DENs) that had a uniform size of ~1.7 nm for hydrolytic dehydrogenation of ammonia borane (AB). The PtPd DENs, composed of seven different Pt : Pd ratios, were synthesized using hydroxyl-terminated sixth-generation polyamidoamine dendrimers as a molecular template. The dendrimer-templating method allowed for synthesizing bimetallic PtPd DENs with controllable nanoparticle composition while fixing the size of the nanoparticles uniformly at ~1.7 nm. Compared with monometallic Pt and Pd DENs, the bimetallic PtPd DENs showed superior catalytic activity for the hydrolytic dehydrogenation of AB. Furthermore, the bimetallic PtPd DENs exhibited composition-dependent activity with the maximum activity (i.e., average turnover frequency=108.5 ± 15.9mol H2ㆍmol atomPt+Pd -1ㆍmin-1) at a Pt : Pd ratio of 1 : 1 for the catalytic hydrolysis of AB.
Keywords:Dendrimer-encapsulated Nanoparticle (DEN);Hydrolytic Dehydrogenation;Ammonia Borane;Bimetallic PtPd Nanoparticles;Composition-dependent Catalysis
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