Dealloying and heat treatment methods are combined to regulate the surface structure of CoAuPd nanocatalysts (NCs), and improve their activity and stability for methanol oxidation. The effect of the sequence of the two methods on the structure-activity-stability relationship is investigated and optimized. CoAuPd-1 and CoAuPd-3 NCs were prepared by simple co-reduction and successive reduction method, respectively. The CoAuPd NCs obtained by dealloying after heat treatment (CoAuPd-HD) have better dispersity, larger electrochemical active surface area (ECSA), higher activity, stability, and anti-CO poisoning durability. The mass and specific activity of CoAuPd-3-HD are 333.478 mA mg_Pd⁻¹ and 1.109 mA cm⁻², respectively, which are higher than the CoAuPd-3 obtained by heat treatment after dealloying (CoAuPd-3-DH). The current densities of CoAuPd-3-DH and CoAuPd-3-HD remain 44.6 and 80.7% after 500 cycles, respectively, indicating that dealloying after heat treatment can significantly enhance the stability. The combination of heat treatment and dealloying is expected to provide a new idea for the design of low Pd, Pt-based catalysts with high activity and stability.

脱合金和热处理方法相结合，以调节CoAuPd纳米催化剂（NCs）的表面结构，并提高其活性和甲醇氧化的稳定性。研究和优化了两种方法的顺序对结构-活性-稳定性关系的影响。CoAuPd-1和CoAuPd-3 NCs分别通过简单的共还原和连续还原的方法制备。通过热处理后脱合金获得的CoAuPd NC（CoAuPd-HD）具有更好的分散性，更大的电化学活性表面积（ECSA），更高的活性，稳定性和抗CO中毒耐久性。CoAuPd-3-HD的质量和比活度为333.478 mA mg _Pd ^-1和1.109 mA cm ^-2分别高于脱合金后通过热处理获得的CoAuPd-3（CoAuPd-3-DH）。在500次循环后，CoAuPd-3-DH和CoAuPd-3-HD的电流密度分别保持44.6和80.7％，表明热处理后的脱合金可以显着提高稳定性。热处理和脱合金的结合有望为设计具有高活性和稳定性的低Pd，Pt基催化剂提供新的思路。