Two kinds of ternary cobalt gold palladium (CoAuPd) and three kinds of binary AuPd alloy nanocatalysts are synthesized by co-reduction and successive reduction method. The CoAuPd nanocatalysts obtained by the successive reduction method possess a hollow structure with some solid nanospheres, nanodendrites and show much better catalytic activity for methanol oxidation reaction (MOR) (1.26 mA cm⁻²) than another CoAuPd NCs (1.14 mA cm⁻²) and binary AuPd nanocatalysts (0.85 mA cm⁻²). CO adsorption and electrochemical dealloying method can restructure nanocatalyst surface and improve MOR and oxygen reduction reaction (ORR) activities. Electrochemical dealloying reconstructs the hollow CoAuPd alloy to a [email protected] core-shell structure with pinholes and the dealloyed NCs exhibits better MOR (1.92 mA cm⁻²) and ORR (6.3 mA cm_GEO⁻²) catalytic activities than the initial CoAuPd nanocatalysts (1.26 mA cm⁻² for MOR and 3.4 mAcm_GEO⁻² for ORR). Accelerated durability tests (ADT) quantify the changes of stability before and after the surface reconstruction. The ternary CoAuPd nanocatalysts have excellent durability before and after surface reconstruction (current density decrease 14.04% for MOR and 0.3 mA cm_GEO⁻² for ORR) in alkaline medium.

通过共还原和连续还原的方法合成了两种三元钴金钯（CoAuPd）和三种二元AuPd合金纳米催化剂。通过连续还原法获得的CoAuPd纳米催化剂具有带有一些固体纳米球，纳米树枝状晶体的中空结构，并且对甲醇氧化反应（MOR）（1.26 mA cm ^-2）的催化活性比另一种CoAuPd NCs（1.14 mA cm ^-2）好得多。和二元AuPd纳米催化剂（0.85 mA cm ^-2）。CO吸附和电化学脱合金的方法可以重组纳米催化剂表面并提高MOR和氧还原反应（ORR）的活性。电化学脱合金将空心CoAuPd合金重构为具有针孔的[受电子邮件保护的]核-壳结构，并且脱合金的NC表现出比初始CoAuPd纳米催化剂更好的MOR（1.92 mA cm ^-2）和ORR（6.3 mA cm _GEO ^-2）催化活性。 （1.26 mA cm ^-2用于MOR和3.4 mAcm _GEO ^-2对于ORR）。加速耐久性测试（ADT）可以量化表面重建前后的稳定性变化。在碱性介质中，三元CoAuPd纳米催化剂在表面重建前后具有出色的耐久性（MOR的电流密度降低14.04％，ORR的电流密度降低0.3 mA cm _GEO ^-2）。