Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, D-40237 Düsseldorf, Germany.
Chemphyschem. 2010 Sep 10;11(13):2838-43. doi: 10.1002/cphc.201000322.
Gold nanobelts were synthesized by directional solidification of the Fe-Au eutectoid followed by selective phase dissolution. Cleaning from organic molecules was performed in alkaline solution by PbO(2) deposition/dissolution to avoid surface reconstruction. The electrochemical behaviour of the Au nanobelts was determined by structure-sensitive electrochemical reactions, and the findings confirm the results obtained by selected area electron diffraction (SAED). The underpotential deposition (UPD) of lead under alkaline conditions and cyclic voltammograms (CVs) in sulphuric acid revealed an unusual large amount of (110) domains (>65%). Finally, after cleaning the Au nanobelts showed a higher and stable electrocatalytic behaviour toward methanol oxidation in alkaline media. The possible mechanism and the potential applications of the Au nanobelts are discussed.
金纳米带通过共晶 Fe-Au 的定向凝固和选择性相溶解来合成。通过 PbO(2) 的沉积/溶解在碱性溶液中进行有机分子的清洗，以避免表面重构。通过结构敏感的电化学反应来确定 Au 纳米带的电化学行为，并且发现结果与选区电子衍射 (SAED) 的结果一致。在碱性条件下的铅欠电位沉积 (UPD) 和在硫酸中的循环伏安法 (CVs) 显示出异常大量的 (110) 畴 (>65%)。最后，在清洗之后，Au 纳米带在碱性介质中对甲醇氧化表现出更高和更稳定的电催化行为。讨论了 Au 纳米带的可能机制和潜在应用。
