Coordination chemistry offers a ‘bottom-up’ route to synthesize complex structures from simple components with a nanoscale precision, while galvanic replacement has been proved as a versatile and powerful tool for programmable construction of the multidimensional nanomaterials. In this paper, we first present a facile approach to the preparation of palladium-based organometallics by using dimethyl sulfoxide as the unconventional organic ligands, which leads to the formation of (AcO)₂–Pd–(DMSO)₂ microrods with well-defined morphology. A sequential heat treatment combining with galvanic replacement provides access to hierarchically nanostructured mesoporous Pd, Pd@Au and Pd@Pt catalysts, which can be used as excellent electrocatalysts with high activity and stability in methanol oxidation. We anticipate that this coordination-thermal decomposition-galvanic replacement coupled strategy will provide a general route to the manufacture of sophisticated bimetallic catalysts bearing three-dimensionally mesoporous features on the nanometer scale.

中文翻译：

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介孔Pd @ M（M = Pt，Au）微棒是甲醇氧化的优良电催化剂

配位化学提供了一种“自下而上”的途径，可以以纳米级的精度从简单的部件合成复杂的结构，而电化学取代已被证明是用于多维纳米材料可编程构造的多功能且功能强大的工具。在本文中，我们首先提出一种使用二甲基亚砜作为非常规有机配体来制备钯基有机金属的简便方法，这导致了（AcO）₂ -Pd-（DMSO）₂的形成。具有明确形态的微棒。顺序热处理与电流置换相结合可提供分层的纳米结构介孔Pd，Pd @ Au和Pd @ Pt催化剂，这些催化剂可用作具有高活性和甲醇氧化稳定性的出色电催化剂。我们预计，这种配位-热分解-电流置换耦合策略将为制造具有纳米级三维介孔特征的复杂双金属催化剂提供一条通用途径。