Continuous-flow synthesis of Pd@Pt core-shell nanoparticles

被引：14
|
作者：
Hashiguchi, Yuta [1 ,2 ]
Watanabe, Fumihiro [3 ]
Honma, Tetsuo [4 ]
Nakamura, Isao [3 ]
Poly, Sharmin Sultana [3 ]
Kawaguchi, Tatsuya [2 ]
Tsuji, Tetsurou [2 ]
Murayama, Haruno [5 ]
Tokunaga, Makoto [5 ]
Fujitani, Tadahiro [3 ]
机构：
[1] Res Assoc High Throughput Design & Dev Adv Funct, Tsukuba, Ibaraki 3058565, Japan
[2] UBE Ind Ltd, Corp Res & Dev, Frontier Technol Res Lab, Ichihara, Chiba 2900045, Japan
[3] Natl Inst Adv Ind Sci & Technol, Interdisciplinary Res Ctr Catalyt Chem, Tsukuba, Ibaraki 3058565, Japan
[4] Japan Synchrotron Radiat Res Inst JASRI, SPring 8, Sayo, Hyogo 6795198, Japan
[5] Kyushu Univ, Dept Chem, Grad Sch Sci, Nishi Ku, Fukuoka 8190395, Japan
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2021年 / 620卷
关键词：
Core-shell; Direct support; Flow process; ORR; Structural analysis; PLATINUM-MONOLAYER ELECTROCATALYSTS; OXYGEN REDUCTION REACTION; XAFS MEASUREMENT SYSTEM; MICROFLUIDIC SYNTHESIS; IN-SITU; ALLOY; CATALYSTS; PERFORMANCE; CATHODE; BL14B2;
D O I：
10.1016/j.colsurfa.2021.126607
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A flow manufacturing process was investigated for the synthesis of Pd@Pt core-shell nanoparticles (NPs) with high productivity and exact structural control. Pd@Pt core-shell NPs were successfully synthesized in a flow reactor using polyvinylpyrrolidone (PVP) as a capping agent. However, the oxygen reduction reaction (ORR) activity of the Pd@Pt/PVP/C catalyst was found to be significantly lower than that of commercial Pt/C as the remaining PVP inhibited ORR. In order to improve ORR activity, it is necessary to support the highly dispersed Pd@Pt NPs on activated carbon without the use of PVP. Cyclic voltammetry, transmission electron microscopy, and X-ray absorption fine structure analyses showed that Pd@Pt NPs could be uniformly dispersed on activated carbon by adding bis(2-methoxyethyl) ether (diglyme) as a capping agent. The particle size and core-shell structure of the Pd@Pt NPs did not differ significantly between the NPs synthesized with PVP or diglyme, indicating that advanced structural control was possible without PVP. Furthermore, the mass activity per Pt weight of the Pd@Pt/C catalyst using diglyme was found to be 1.8-fold higher than that of Pt/C. We thus succeeded in synthesizing Pd@Pt core-shell NPs with precisely controlled structure and high ORR activity by flow process.
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页数：10
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