As a novel non-aqueous green solvent that can deem to be the optimal substitution of conventional solvents and ionic liquids, deep-eutectic solvents (DESs) have attracted significant attention from academia and industry in terms of chemical synthesis in recent years. Herein, we report the highly effective preparation of Pt nanoparticles with hollow-opened structures (Pt HOSs) as an efficient electrocatalyst for methanol oxidation reaction (MOR) via a facile template-free solvothermal synthesis in DESs. The as-obtained Pt HOSs are consisted of well assembled secondary and tertiary branches, which can remarkably improve the utilization efficiency and electrocatalytic activity of Pt via promoting the access of electroactive species to the full-extent Pt surface. In this regard, the as-prepared Pt HOSs possess higher electrochemically active surface areas (ECSAs) and show improved electrochemical properties for MOR. Furthermore, the Pt HOSs retain a higher reactivity after the long-term testing compared with commercial Pt black, suggesting that they have enhanced electrocatalytic durability. In specific, the rational design of Pt HOSs in DESs may enrich the synthetic strategies for producing more electrocatalysts with impressive activity and stability.

作为可以被认为是传统溶剂和离子液体的最佳替代品的新型非水绿色溶剂，深共晶溶剂（DES）近年来在化学合成方面引起了学术界和工业界的极大关注。在本文中，我们报告了高效的制备具有空心开孔结构（Pt HOSs）的Pt纳米颗粒，它是通过DES中简便的无模板溶剂热合成方法作为甲醇氧化反应（MOR）的有效电催化剂。所获得的Pt HOS由组装良好的二级和三级分支组成，通过促进电活性物质进入全范围的Pt表面，可以显着提高Pt的利用效率和电催化活性。在这方面，所制备的Pt HOS具有更高的电化学活性表面积（ECSA），并且对MOR具有改善的电化学性能。此外，经过长期测试，Pt HOS与市售Pt黑相比保留了更高的反应性，表明它们具有增强的电催化耐久性。特别是，DES中Pt HOS的合理设计可以丰富合成策略，以生产更多具有令人印象深刻的活性和稳定性的电催化剂。