Thermally driven interfacial diffusion synthesis of nitrogen-doped carbon confined trimetallic Pt3CoRu composites for the methanol oxidation reaction. Issue 30 (18th July 2019)

• Record Type: Journal Article
• Authors: Wang, Qingmei; Chen, Siguo; Lan, Huiying; Li, Pan; Ping, Xinyu; Ibraheem, Shumaila; Long, Daojun; Duan, Yijun; Wei, Zidong
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 30(2019)
• Page Start: 18143
• Page End: 18149
• Publication Date: 2019-07-18
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta04412d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A thermally driven interfacial diffusion strategy was employed to fabricate a trimetallic Pt3 CoRu/C@NC catalyst with excellent enhancement towards the MOR in terms of superior stability and anti-CO poisoning. Abstract : A current challenge to direct methanol fuel cells (DMFCs) is the insufficient electrocatalytic activity and anti-CO poisoning ability of Pt-based alloy catalysts toward the methanol oxidation reaction (MOR). In this work, a simple thermally driven interfacial diffusion alloying method is adopted to synthesize Pt3 CoRu/C@NC trimetallic nanoparticles (NPs) with enhanced MOR activity and anti-CO poisoning ability. The MOR mass activity of the Pt3 CoRu/C@NC catalyst (0.97 mA μgPt −1 ) is 4.2 times larger than that of the commercial Pt/C catalyst (0.23 mA μgPt −1 ). Moreover, the Pt3 CoRu/C@NC catalyst exhibits a much lower CO oxidation onset potential than the commercial Pt/C catalyst (0.35 V vs. 0.82 V), which directly indicates the improved anti-CO poisoning ability of the catalyst. This enhancement in MOR activity as well as anti-CO poisoning ability of the Pt3 CoRu/C@NC catalyst is mainly attributed to the synergistic effect of Ru (as a water activator) and Co (as an electronic modifier). Indeed, this work not only provides a satisfactory strategy for improving the activity and anti-CO poisoning ability of MOR electrocatalysts but also gives a significant insight into simple and cost-effective alloying methods for developing homogeneous trimetallic alloy catalysts.