Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 27, Pages 11461-11467Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp50661d
Keywords
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Funding
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2012-0005422, 2012-0003779]
- General R/D Program of the Daegu Gyeongbuk Institute of Science and Technology (DGIST)
- Ministry of Education, Science and Technology (MEST) of the Republic of Korea
- National Research Foundation of Korea [2010-0004653, 2011-0015619] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A series of hollow Pd nanoshells are prepared by employing Co nanoparticles as sacrificial templates with different concentrations of a Pd precursor (1, 6, 12, 20, and 40 mM K2PdCl4), denoted hPd-X (X: concentration of K2PdCl4 in mM unit). The synthesized hPd series are tested as a cathodic electrocatalyst for oxygen reduction reaction (ORR) in alkaline solution. The morphology and surface area of the hPd catalysts are characterized using scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), and cyclic voltammetry (CV). Rotating disk electrode (RDE) voltammetric studies show that the hPd-20 (prepared using 20 mM K2PdCl4) has the highest ORR activity among all the hPd series, while being comparable to commercial Pd and Pt catalysts (E-TEK). The more facilitated ORR at hPd-20 is presumably induced by the enhanced Pd surface area and efficiently high porosity of Pd nanoshells.
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