TY - JOUR
T1 - Seeded Growth of Au@PdAg Alloy Core-Shell Nano-Dendrites with Tunable Size and Composition
AU - Zhang, Gongguo
AU - Ma, Yanyun
AU - Liu, Feng
AU - Fu, Xiaowei
AU - Luan, Xiaoqian
AU - Qu, Fengli
AU - Liu, Maochang
AU - Zheng, Yiqun
N1 - Publisher Copyright:
© 2020 Wiley-VCH GmbH
PY - 2021/1/15
Y1 - 2021/1/15
N2 - We report a facile synthesis of Au@PdAg alloy core-shell nanocrystals in dendrite form, having tunable size and composition. In particular, using spherical Au nanoparticles as seeds, the co-reduction of Pd and Ag precursor in growth stage results in the formation of PdAg alloy shells with a dendrite shape. Their size and elemental composition can be tuned by varying the seed amount and feeding ratio in Pd and Ag precursor, respectively, illustrating the versatility of the current synthetic strategy. The size, morphology, and elemental composition of the products have been characterized using a set of techniques, including SEM, TEM, XRD, XPS, HAADF-STEM, and EDX-STEM mapping. When working as electrocatalysts, the current Au@PdAg alloy core-shell nanocrystals supported by carbon black exhibit enhanced activity and excellent operation stability for electroxidation of ethanol as compared to commercial Pd/C. The current work offers a feasible strategy to preparation of multi-metallic core-shell dendritic nanocrystals with controllable size and composition and could find important use in fuel cells and related fields.
AB - We report a facile synthesis of Au@PdAg alloy core-shell nanocrystals in dendrite form, having tunable size and composition. In particular, using spherical Au nanoparticles as seeds, the co-reduction of Pd and Ag precursor in growth stage results in the formation of PdAg alloy shells with a dendrite shape. Their size and elemental composition can be tuned by varying the seed amount and feeding ratio in Pd and Ag precursor, respectively, illustrating the versatility of the current synthetic strategy. The size, morphology, and elemental composition of the products have been characterized using a set of techniques, including SEM, TEM, XRD, XPS, HAADF-STEM, and EDX-STEM mapping. When working as electrocatalysts, the current Au@PdAg alloy core-shell nanocrystals supported by carbon black exhibit enhanced activity and excellent operation stability for electroxidation of ethanol as compared to commercial Pd/C. The current work offers a feasible strategy to preparation of multi-metallic core-shell dendritic nanocrystals with controllable size and composition and could find important use in fuel cells and related fields.
KW - Dendrites
KW - Nanocrystals
KW - Palladium
KW - Seeded growth
KW - Silver
UR - https://www.scopus.com/pages/publications/85097281763
U2 - 10.1002/ejic.202000776
DO - 10.1002/ejic.202000776
M3 - 文章
AN - SCOPUS:85097281763
SN - 1434-1948
VL - 2021
SP - 156
EP - 165
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 2
ER -