NDLI: The Effect of TiO$_{2}$ on the Catalytic Activity of a PtRu/C Catalyst for Methanol Oxidation

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The Effect of TiO$_{2}$ on the Catalytic Activity of a PtRu/C Catalyst for Methanol Oxidation

Content Provider	Springer Nature Link
Author	Ocampo, Ana Lilia Jiang, Qi Zhong Ma, Zi Feng Varela, Javier Rodríguez Gyves, Josefina
Copyright Year	2014
Abstract	In this work, the effect of the addition of different amounts of TiO$_{2}$ nanotubes to a PtRu catalyst supported on Vulcan XC-72R carbon black for methanol oxidation was studied. Two approaches were used for the catalyst preparation. In the first case, Pt and Ru metal ions were impregnated onto the support (C-TiO$_{2}$) and subsequently reduced with NaBH$_{4}$. In the second case, the metal ions were first reduced and then impregnated, in order to obtain a catalyst with metal loading of 30 % of PtRu (50:50 at.% composition of Pt/Ru) and varying concentrations of TiO$_{2}$ (5–15 wt%); the actual composition was determined by inductively coupled plasma optical emission spectrometry (ICP-OES) analysis. The electrochemical properties were studied via cyclic voltammetry and chronoamperometry in 0.5 M H$_{2}$SO$_{4}$ solution. X-ray diffraction analyses indicated the formation of PtRu alloy with different degrees of alloying. The CO-stripping voltammetry studies showed that both the onset potential and the peak potential are dependent on the catalyst composition; the PtRu/C-TiO$_{2}$(10) exhibited a relatively higher CO oxidation current compared to those exhibited by the other catalysts. Both the linear sweep voltammetry and the chronoamperometric results also demonstrated that the PtRu/C-TiO$_{2}$(10) catalyst exhibited a higher methanol oxidation current and a lower poisoning rate among the investigated catalysts with various TiO$_{2}$ nanotube contents (i.e., 0, 5, and 15 % TiO$_{2}$). The prepared catalysts revealed essentially the same catalytic performance independently of the procedure used for their preparation.
Starting Page	387
Ending Page	395
Page Count	9
File Format	PDF
ISSN	18682529
Journal	Electrocatalysis
Volume Number	5
Issue Number	4
e-ISSN	18685994
Language	English
Publisher	Springer US
Publisher Date	2014-05-09
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alcohol oxidation TiO$_{2}$ Supported catalyst DAFC Electrochemistry Physical Chemistry Catalysis Energy Technology
Content Type	Text
Resource Type	Article
Subject	Electrochemistry

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