Toggle Main Menu Toggle Search

ePrints

Three-dimensional cubic ordered mesoporous carbon (CMK-8) as highly efficient stable Pd electro-catalyst support for formic acid oxidation

Lookup NU author(s): Taiwo Alaje, Professor Keith Scott

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

In this work, Pd nanoparticles were supported on two types of three-dimensional cubic highly ordered mesoporous carbon (CMK-8) by the sodium borohydride reduction method and the activity of the Pd/CMK-8 electro-catalysts towards formic acid oxidation was evaluated and compared with that of commercial Pd/C (E-TEK) catalyst. The catalysts were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), cyclic voltammetry, and chronoamperometry. Cyclic voltammetry revealed Pd/CMK-8 with larger pores as being the most electroactive with a mass specific activity (mA mg(Pd)(-1)) of 486.4 that exceeded not only that of the Pd/C (E-TEK) (386.5 mA mg(Pd)(-1)) but also that of recently reported Pd/CNT (200 mA mg(Pd)(-1)), Pd/Graphene (210 mA mg(Pd)(-1)) and Pd/Vulcan XC 72 (193 mA mg(Pd)(-1)). As demonstrated with chronoamperometry, the larger pore Pd/CMK-8 also proved to be the most stable catalyst. This exceptional performance can be ascribed to the very high surface area and la3d symmetry that yields a relatively isotropic graphitized structure with a high conductivity. In addition, the open framework of the 3-D bicontinous channels and highly ordered mesopores allows for an advanced mass transfer characteristics. The results show that CMK-8 support would significantly improve the power output and stability of Pd-based electro-catalysts for formic acid oxidation. (C) 2012 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Maiyalagan T, Nassr AA, Alaje TO, Bron M, Scott K

Publication type: Article

Publication status: Published

Journal: Journal of Power Sources

Year: 2012

Volume: 211

Pages: 147-153

Print publication date: 10/04/2012

ISSN (print): 0378-7753

ISSN (electronic): 1873-2755

Publisher: Elsevier SA

URL: http://dx.doi.org/10.1016/j.jpowsour.2012.04.001

DOI: 10.1016/j.jpowsour.2012.04.001


Altmetrics

Altmetrics provided by Altmetric


Actions

    Link to this publication


Share