Developing highly active and durable methanol electrooxidation reaction electrocatalysts for direct methanol fuel cells is crucial to achieve their practical application in future energy storage and conversion. Herein, we demonstrate that a nickel supported Pt-decorated electrode with an ultralow mass loading (1.50 μg cm⁻²) featuring Ni-Pt hybrid nanoparticles growing on self-reconstructed porous nickel frameworks (Pt/p-Ni) is synthesized via a facile electrochemical activation process. The self-supported Pt/p-Ni exhibits 3.65-fold higher activity for catalyzing the methanol electrooxidation reaction than that of commercial Pt/C with the same Pt loading under alkaline media. The activation approach results in surface rearrangement of Ni substrate to form nanoporous skeletons and highly dispersed Ni-Pt hybrid nanoparticles with a mean size of 4.34 nm grown on the nano-ligaments of the Ni porous skeletons. The porous skeletons decorated with nano-dispersion of Pt significantly increase the surface active sites and, therefore, yield a superior catalytic activity. Experiments coupled with density-functional theory calculations suggest the existence of a strong electronic interaction at the superface of the Pt/p-Ni, which leads to efficiently weaken the adsorption of CO on the catalyst surface and alleviate the CO_ads poisoning of the active sites, resulting in remarkably enhanced methanol electrooxidation activity and durability.

开发用于直接甲醇燃料电池的高活性和持久性甲醇电氧化反应电催化剂，对于在未来的能量存储和转换中实现其实际应用至关重要。本文中，我们证明了镍负载的Pt装饰电极具有超低的质量负荷（1.50μgcm ^-2）具有特征的Ni-Pt杂化纳米颗粒生长在自重构多孔镍骨架（Pt / p-Ni）上，是通过一种简便的电化学活化过程合成的。自负载的Pt / p-Ni催化甲醇电氧化反应的活性比在碱性介质下相同的Pt负载下的商业Pt / C活性高3.65倍。活化方法导致Ni基质的表面重排，以形成纳米多孔骨架和高度分散的Ni-Pt杂化纳米粒子，平均粒径为4.34 nm，生长在Ni多孔骨架的纳米配体上。用Pt的纳米分散体装饰的多孔骨架显着增加了表面活性位，因此产生了出色的催化活性。_会污染活性位点，从而显着提高甲醇的电氧化活性和耐久性。