Mesocrystal PtRu supported on reduced graphene oxide as catalysts for methanol oxidation reaction

Yandi Shi; Wenxiang Zhu; Huixian Shi; Fan Liao; Zhenglong Fan; Mingwang Shao

doi:10.1016/j.jcis.2019.09.038

Mesocrystal PtRu supported on reduced graphene oxide as catalysts for methanol oxidation reaction

J Colloid Interface Sci. 2019 Dec 1:557:729-736. doi: 10.1016/j.jcis.2019.09.038. Epub 2019 Sep 12.

Authors

Yandi Shi¹, Wenxiang Zhu¹, Huixian Shi¹, Fan Liao², Zhenglong Fan¹, Mingwang Shao³

Affiliations

¹ Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, PR China.
² Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, PR China. Electronic address: fliao@suda.edu.cn.
³ Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, PR China. Electronic address: mwshao@suda.edu.cn.

PMID: 31563605
DOI: 10.1016/j.jcis.2019.09.038

Abstract

Design of catalysts with advanced structures has been extensively studied. Mesocrystal structure with the uniform crystal orientation shows special properties in electrocatalysis. Herein, PtRu mesocrystal was synthesized on F doped graphene by wet chemical method. In this reaction system, silicon nanowires and hydrofluoric acid were used to form Si - H bonds, which served as reducing agents to reduce Pt and Ru ions and grow PtRu particles on reduced graphene oxide (rGO). The electrochemical results showed that the PtRu/rGO catalyst had a favourable electrocatalytic performance on methanol oxidation reaction. The corresponding mass activity reached 739 mA mg^-1_Pt, which was 2.23 times as large as 20% commercial platinum carbon (Pt/C, 332 mA mg^-1_Pt). Its stability and toxicity resistance were also much better than those of commercial Pt/C, showing a great prospect in practice applications. Furthermore, the forming mechanism of PtRu mesocrystal is discussed, which has general implications for the design of superstructure catalysts.

Keywords: Graphene; Mesocrystal; Methanol oxidation reaction; Pt; Ru.