双功能
双金属片
材料科学
电催化剂
氧化还原
催化作用
纳米技术
合理设计
纳米孔
析氧
化学工程
金属
电化学
电极
化学
有机化学
冶金
工程类
物理化学
作者
Qing Zhang,Pengfei Liu,Xiaogang Fu,Yuan Yang,Liguang Wang,Rui Gao,Lirong Zheng,Lin Yang,Zhengyu Bai
标识
DOI:10.1002/adfm.202112805
摘要
Abstract Rational design of efficient non‐precious materials for oxygen redox electrocatalysis is currently a critical obstacle for rechargeable zinc‐air batteries. Herein, this work presents a strategy to modulate the activity and mass transfer performance for advanced bifunctional electrocatalysts. This is achieved via a prior vacuum heat treatment‐assisted pyrolysis approach, obtaining atomically disperse Fe/Co sites and alloy nanoparticle composites rooted in the unique well‐aligned nanotubes hierarchical architecture. The design of multiple metal active species and hierarchically porous structure facilitates the bifunctional activity and accessibility of the active sites, respectively, which affords the catalyst enhanced performance in rechargeable zinc‐air batteries, outperforming the commercial Pt/C‐Ir/C benchmarks. This work provides a new avenue to improve activity and accessibility together with single atomic catalysts as advanced bifunctional air cathodes for efficient oxygen redox electrocatalysis.
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