Alloying-Induced Synthesis of Amorphous PdZnS Hollow Spheres as Enhanced Oxygen Reduction Catalysts.
Donghui ZhaoRui ZhuYiwen SunQian WangJialong YuHui JinHongyu ChenYawen WangPublished in: Small (Weinheim an der Bergstrasse, Germany) (2023)
Amorphous alloys have multiple advantages in electrocatalysis, yet the isotropic nature makes their syntheses a great obstacle in application. In this work, it is shown that the Zn 2+ can interfere with the crystallization of Pd-base structures to form amorphous alloy materials. By simply adjusting the Zn 2+ content, unique PdZnS amorphous hollow spheres (AHS) with various compositions and degrees of crystallinity can be obtained through a facile one-pot wet chemical method. Owing to both the amorphous nature and hollow morphologies, the PdZnS AHSs possess appealing activities and stabilities as oxygen reduction catalysts. Typically, the Pd 20 ZnS 10 AHSs exhibit the highest half-wave potential (E 1/2 ) of 0.940 V (vs reversible hydrogen electrode), and such E 1/2 only negatively shifts 25 mV after 60 000 cycles.