Single-atom palladium anchored N-doped carbon towards oxygen electrocatalysis for rechargeable Zn–air batteries. Issue 32 (28th July 2022)

• Record Type: Journal Article
• Authors: Han, Chunxiao; Yi, Wenwen; Feng, Sisi; Li, Zhongping; Song, Haiou
• Is Part Of: Dalton transactions. Volume 51:Issue 32(2022)
• Page Start: 12314
• Page End: 12323
• Publication Date: 2022-07-28
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt01760a
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Herein, an atomically dispersed palladium catalyst on a hierarchical porous structure of N-doped carbon (Pd1 /N–C) is prepared using a facile freeze-drying-assisted strategy. Abstract : Herein, an atomically dispersed palladium catalyst on a hierarchical porous structure of N-doped carbon (Pd1 /N–C) is prepared using a facile freeze-drying-assisted strategy. Freeze-drying methods not only suppress the aggregation of Pd atoms but also successfully produce abundant nanopores. HAADF-STEM confirms that Pd single atoms are uniformly anchored on the N–C surface. The Pd1 /N–C electrocatalyst enhances the ORR and OER activity and durability compared to N–C and Pd–NPs/N–C. Rechargeable Zn–air batteries (ZABs) based on novel Pd1 /N–C exhibit a peak power density of 113.7 mW cm −2 and maintain a voltage efficiency of 64.0% after 495 cycles at a discharge current density of 5 mA cm −2 . Besides, two ZABs in series can supply an LED light for at least 170 h.