Synthesis of vanadium-doped palladium nanoparticles for hydrogen storage materials

• Published in: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology Vol. 13; no. 12; pp. 6333 - 6338
• Main Authors: Yamamoto, Yuki, Miyachi, Mariko, Yamanoi, Yoshinori, Minoda, Ai, Maekawa, Shunsuke, Oshima, Shinji, Kobori, Yoshihiro, Nishihara, Hiroshi
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-12-2011; Springer Nature B.V
• Subjects: Brief Communication; Characterization and Evaluation of Materials; Chemistry and Materials Science; Hydrogen; Inorganic Chemistry; Lasers; Materials Science; Nanoparticles; Nanotechnology; Optical Devices; Optics; Palladium; Photonics; Physical Chemistry; Sodium hydroxide; Vanadium; Hydrogen storage; Palladium; Polyol method; Nanoparticle; Vanadium; Energy storage
• ISSN: 1388-0764; 1572-896X
• DOI: 10.1007/s11051-011-0628-0

Palladium–vanadium (Pd/V) alloy nanoparticles stabilized with
n
-pentyl isocyanide were prepared as new hydrogen storage materials by a facile polyol-based synthetic route with tetraethylene glycol and NaOH at 250 °C. The size distribution of the nanoparticles thus obtained featured two peaks at 4.0 ± 1.1 and 1.4 ± 0.3 nm in diameter, which were the mixture of Pd/V alloy and Pd nanoparticles. The ratio between the number of Pd/V and that of Pd nanoparticles was 51:49, and the Pd:V ratio of the overall product was 9:1 in wt%, indicating that the 4.0 nm Pd/V nanoparticles were composed of 81% Pd and 19% V. The inclusion of vanadium caused the increase in the d-spacing and thus expansion of lattice constant. A rapid increase in hydrogen content at low H
2
pressures was observed for the Pd/V nanoparticles, and a 0.47 wt% H
2
adsorption capacity was achieved under a H
2
pressure of 10 MPa at 303 K. Hydrogen storage performances of Pd/V alloy nanoparticles was superior compared with Pd nanoparticles.