Nanoporous PtRu alloys for electrocatalysis

Langmuir : the ACS Journal of Surfaces and Colloids
Caixia XuYi Ding

Abstract

We describe a facile route to the straightforward fabrication of nanoporous (NP) PtRu alloys with predetermined bimetallic compositions. Electron microscopy and X-ray diffraction characterizations demonstrate that selective etching of Al from ternary PtRuAl source alloys generates three-dimensional bicontinuous NP-PtRu alloy nanostructures with a single-phase face-centered-cubic crystalline structure. X-ray photoelectron spectroscopy shows a slight electronic structure modification of Pt by alloying with Ru as well as uniform surface and bulk bimetallic ratio. With characteristic structural dimensions less than 5 nm, these high surface area bimetallic nanostructures show distinct electrocatalytic performance as the Ru content varies within the structure. Among all samples, NP-Pt(70)Ru(30) shows the highest specific activity as well as the most negative onset potential toward methanol oxidation reaction. NP-Pt(50)Ru(50) was found to possess a similar specific activity to the commercial E-TEK Pt(50)Ru(50)/C catalyst, but its onset and peak potentials are about 70 mV more negative. CO stripping experiments demonstrate that the adsorption of CO is the weakest on NP-Pt(70)Ru(30), and further increasing the Ru content actually shifts...Continue Reading

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Citations

Jun 1, 2011·Physical Chemistry Chemical Physics : PCCP·Masataka HakamadaMamoru Mabuchi
Apr 21, 2011·Chemical Communications : Chem Comm·Robert Minch, Mohammed Es-Souni
Dec 6, 2012·Biosensors & Bioelectronics·Rui FengQin Wei
Mar 29, 2014·Nanoscale·Shengchun Yang, Xiao Luo
Aug 24, 2010·Journal of Colloid and Interface Science·Aize LiDavid T Pierce
Feb 14, 2013·Chemistry, an Asian Journal·Prasannan KarthikaYusuke Yamauchi
Mar 22, 2012·Chemistry, an Asian Journal·Hamed Ataee-EsfahaniYusuke Yamauchi
Feb 24, 2015·Journal of Colloid and Interface Science·Dianyun Zhao, Caixia Xu
Jun 25, 2014·Frontiers in Chemistry·Athanasios PapaderakisSotiris Sotiropoulos
Jul 19, 2016·Physical Chemistry Chemical Physics : PCCP·Jie LiHaoran Geng
Mar 8, 2017·The Journal of Physical Chemistry. a·Hongbo ShiAshwin Ramasubramaniam
Jul 29, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Weiyue ZhaoXun Wang
Dec 29, 2020·Journal of Environmental Science and Health. Part C, Toxicology and Carcinogenesis·Chuang LiuWeiwei He
Oct 5, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Chuqing LiuZhiyong Gu
Jun 2, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Lei BaiZirong Li
Mar 11, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Biyi HuangKefa Cen

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