Journal
JOURNAL OF POWER SOURCES
Volume 197, Issue -, Pages 38-43Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2011.09.030
Keywords
Direct formic acid fuel cell; Formic acid electrooxidation; Pd catalyst; Electrochemical surface area
Funding
- Science and Technology Ministry of China [2007AA05Z159, 2007AA05Z143]
- National Natural Science Foundation of China [20933004, 21011130027, 20703043, 20876153, 21073180]
- Science & Technology Research Programs of Jilin Province [20102204]
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It is found that the electrocatalytic activity and stability of Pd/C nanocatalyst for formic acid electrooxidation are enhanced by the introduction of EuOx. The morphology, composition and electrocatalytic properties of the PdEuOx/C catalyst are investigated by the transmission electronmicroscopy, energy dispersive X-ray analysis, X-ray diffraction, the linear sweep voltammetry and chronoamperometry, respectively. The EDX results confirm the existence of EuOx in the PdEuOx/C catalysts. The XRD results indicate that the Pd is in the state of face-centered cubic phase structure. The linear sweeping voltammerry and chronoamperometry measurements show that the current of formic acid electrooxidation on the PdEuOx/C catalyst is ca. 2.5 times and 9 times as high as that of the home-made Pd/C catalyst, respectively; moreover, the performances are also much higher than the commercial Pd/C catalyst. The high performances can be attributed to the larger electrochemical surface area and the electronic effect of the EuOx in the PdEuOx/C catalyst. (C) 2011 Elsevier B.V. All rights reserved.
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