Mixed-phase PdRu bimetallic structures with high activity and stability for formic acid electrooxidation

Physical Chemistry Chemical Physics : PCCP
Dongshuang WuRong Cao

Abstract

Aiming at investigating the effect of structure on electrocatalytic properties, Pd(50)Ru(50) nanoparticles (NPs) with three different structures were carefully designed in a one-pot polyol process for application in formic acid electrooxidation. The three structures are: (1) single-phase PdRu nanodendrites (denoted as PR-1), (2) a mixed-phase mixture of PdRu nanodendrites and monometallic Ru NPs (denoted as PR-2), and (3) a mixed-phase mixture of monometallic Pd and Ru NPs (denoted as PR-3). From PR-1 to PR-3, the structure was varied from single-phase to mixed-phase. The relative position of Ru was altered from completely Pd-connected (PR-1), to a mixture of Pd-connected and monometallic (PR-2), and completely monometallic (PR-3). All PdRu NPs outperform the commercial Pd/C. PR-2 exhibits the highest peak current density, but its stability is slightly lower than that of PR-3. When both the current density and the durability are taken into consideration, PR-2 is the best choice of catalyst for formic acid oxidation. It indicates that both the Pd-connected Ru NPs and monometallic Ru NPs in the mixed-phase PR-2 are essential to improve the electrocatalytic properties. Our study also illustrates that the electrochemical active sur...Continue Reading

References

Jan 24, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·C RothD J Schiffrin
May 10, 2008·Journal of the American Chemical Society·Feng-Ru FanZhong-Qun Tian
Feb 18, 2010·Chemical Communications : Chem Comm·Qiang YuanXun Wang
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Jan 8, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Hung-lung ChouBing-Joe Hwang
Jan 11, 2011·Advanced Materials·Dingsheng Wang, Yadong Li
Mar 2, 2011·Physical Chemistry Chemical Physics : PCCP·Hongrae JeonJaeyoung Lee

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