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Synthesis and electrocatalytic activity of highly porous hollow palladium nanoshells for oxygen reduction in alkaline solution
- Synthesis and electrocatalytic activity of highly porous hollow palladium nanoshells for oxygen reduction in alkaline solution
- Cho Y.-B.; Kim J.E.; Shim J.H.; Lee C.; Lee Y.
- Ewha Authors
- 이종목; 이영미; 심준호
- SCOPUS Author ID
- 이종목; 이영미
- Issue Date
- Journal Title
- Physical Chemistry Chemical Physics
- Physical Chemistry Chemical Physics vol. 15, no. 27, pp. 11461 - 11467
- SCIE; SCOPUS
- Document Type
- 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. © 2013 the Owner Societies.
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