Synthesis of Vanadium-Doped Palladium Nanoparticles for Hydrogen Storage Mater
Synthesis of Vanadium-Doped Palladium Nanoparticles for Hydrogen Storage Mater
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储氢材料用钒掺杂钯纳米粒子的合成
DOI：
10.1007/s11051-011-0628-0
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
and Hiroshi Nishihara
中科院分区：
文献类型：
--
作者：
Yuki Yamamoto;Mariko Miyachi;Yoshinori Yamanoi;Ai Minoda;Shunsuke Maekawa;Shinji Oshima;Yoshihiro Kobori;and Hiroshi Nishihara
采用四乙二醇和 NaOH 在 250 °C 下通过简单的多元醇合成路线制备了用正戊基异氰化物稳定的钯-钒 (Pd/V) 合金纳米颗粒作为新型储氢材料。由此获得的纳米粒子的尺寸分布在直径4.0±1.1和1.4±0.3nm处具有两个峰，它们是Pd/V合金和Pd纳米粒子的混合物。 Pd/V 与 Pd 纳米粒子的数量之比为 51:49，总产物的 Pd:V 重量比为 9:1，表明 4.0 nm Pd/V 纳米粒子由 81% Pd 和 19% V 组成。钒的加入导致 d 间距增加，从而导致晶格常数扩大。在低氢气压力下，Pd/V 纳米粒子的氢含量快速增加，并且在 10 MPa 的氢气压力和 303 K 条件下实现了 0.47 wt% 的氢气吸附容量。与 Pd 纳米粒子相比，Pd/V 合金纳米粒子的储氢性能更为优越。
Palladium–vanadium (Pd/V) alloy nanoparticles stabilized withn-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 H2pressures was observed for the Pd/V nanoparticles, and a 0.47 wt% H2adsorption capacity was achieved under a H2pressure of 10 MPa at 303 K. Hydrogen storage performances of Pd/V alloy nanoparticles was superior compared with Pd nanoparticles.