The formation of colloidal coppernanoparticles stabilized by zinc stearate: one-pot single-step synthesis and characterization of the core–shell particles

文献情報

出版日 2009-07-13

DOI 10.1039/B908034A

インパクトファクター 3.676

著者

André Rittermeier, Shaojun Miao, Xiaoning Zhang, Maurits W. E. van den Berg, Shankhamala Kundu, Yuemin Wang, Sabine Schimpf, Elke Löffler, Roland A. Fischer, Martin Muhler

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要旨

A highly efficient one-step process to generate Cu–Zn colloids was developed, in which the colloidal particles were synthesized from Cu and Zn stearates by reduction with H2 in a continuously operated stirred tank reactor. The resulting spherical, well separated particles have a size of 5–10 nm, consisting of a crystalline Cu0 core (fcc) stabilized by a Zn stearate shell without long-range order. In situ attenuated total reflection FTIR spectroscopy was used to monitor the shift of the C–O stretching vibration of adsorbed CO as a function of temperature and pressure. The absence of the CO rotation–vibration bands of dissolved CO allowed us to obtain FTIR spectra at a CO pressure of 1.0 MPa at 473 K resulting in three shifted CO bands at 2030–2025, 1979–1978, and 1920 cm−1. These bands indicate the presence of reduced coadsorbed Zn species on the metallic Cu surface. Cyclic CO adsorption experiments demonstrated the dynamics of the interaction between the Cu core and the Zn stearate shell.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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