Micelle-Assisted Strategy for the Direct Synthesis of Large-Sized Mesoporous Platinum Catalysts by Vapor Infiltration of a Reducing Agent

Yunqi Li; Yuwei Liu; Yusuke Yamauchi; Yusuf Valentino Kaneti; Saad M Alsheri; Tansir Ahamad; Norah Alhokbany; Jeonghun Kim; Katsuhiko Ariga; Ning Wu; Jun Xu

doi:10.3390/nano8100841

Micelle-Assisted Strategy for the Direct Synthesis of Large-Sized Mesoporous Platinum Catalysts by Vapor Infiltration of a Reducing Agent

Nanomaterials (Basel). 2018 Oct 16;8(10):841. doi: 10.3390/nano8100841.

Authors

Yunqi Li¹, Yuwei Liu², Yusuke Yamauchi^{3

4

5}, Yusuf Valentino Kaneti⁶, Saad M Alsheri⁷, Tansir Ahamad⁸, Norah Alhokbany⁹, Jeonghun Kim¹⁰, Katsuhiko Ariga^{11

12}, Ning Wu¹³, Jun Xu^{14

15}

Affiliations

¹ School of Transportation Science and Engineering and Advanced Vehicle Research Center (AVRC), Beihang University, Beijing 100191, China. yunqi_li@buaa.edu.cn.
² School of Transportation Science and Engineering and Advanced Vehicle Research Center (AVRC), Beihang University, Beijing 100191, China. Yuwei_liu@buaa.edu.cn.
³ Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education), Shandong Key Laboratory of Biochemical Analysis, and Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China. y.yamauchi@uq.edu.au.
⁴ School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia. y.yamauchi@uq.edu.au.
⁵ Department of Plant and Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Korea. y.yamauchi@uq.edu.au.
⁶ International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. KANETI.Valentino@nims.go.jp.
⁷ Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia. AlShehri@ksu.edu.sa.
⁸ Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia. tahamed@ksu.edu.sa.
⁹ Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia. nhokbany@ksu.edu.sa.
¹⁰ School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia. jeonghun.kim@uq.edu.au.
¹¹ International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan. Ariga.Katsuhiko@nims.go.jp.
¹² Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan. Ariga.Katsuhiko@nims.go.jp.
¹³ Bejing Electric Vehicle Co. Ltd., Beijing Economic & Technological Development Area, No. 5 Donghuan Zhonglu, Beijing 100176, China. wuning@bjev.com.cn.
¹⁴ School of Transportation Science and Engineering and Advanced Vehicle Research Center (AVRC), Beihang University, Beijing 100191, China. jun.xu@uncc.edu.
¹⁵ Department of Mechanical Engineering and Engineering Science, The University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, NC 28223, USA. jun.xu@uncc.edu.

Abstract

Stable polymeric micelles have been demonstrated to serve as suitable templates for creating mesoporous metals. Herein, we report the utilization of a core-shell-corona type triblock copolymer of poly(styrene-b-2-vinylpyridine-b-ethylene oxide) and H₂PtCl₆·H₂O to synthesize large-sized mesoporous Pt particles. After formation of micelles with metal ions, the reduction process has been carried out by vapor infiltration of a reducing agent, 4-(Dimethylamino)benzaldehyde. Following the removal of the pore-directing agent under the optimized temperature, mesoporous Pt particles with an average pore size of 15 nm and surface area of 12.6 m²·g^-1 are achieved. More importantly, the resulting mesoporous Pt particles exhibit superior electrocatalytic activity compared to commercially available Pt black.

Keywords: catalysts; mesoporous materials; methanol electro-oxidation; platinum; triblock copolymers.

Publication types

Letter