纳米笼
双功能
析氧
电催化剂
催化作用
材料科学
电池(电)
尖晶石
化学工程
钙钛矿(结构)
异质结
纳米技术
化学
电化学
电极
光电子学
物理化学
生物化学
功率(物理)
物理
量子力学
工程类
冶金
作者
Beibei He,Yanzhu Deng,Huanwen Wang,Rui Wang,Jun Jin,Yansheng Gong,Ling Zhao
标识
DOI:10.1016/j.jcis.2022.06.048
摘要
Interface engineering strategy has been developed to design efficient catalysts for boosting electrocatalytic performance in past few decades. Herein, heterojunctions of PrCoO3/Co3O4 nanocages (PCO/Co3O4 NCs) with atomic-level engineered interfaces and rich oxygen vacancies are proposed for Zn-air batteries. The synthesized product shows exceptional bifunctional activity and robust stability towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The enhanced catalytic capacity is primary attributed to the synergistic effect of PCO/Co3O4, evidenced by the experimental results and theoretical calculations. More importantly, the PCO/Co3O4 NCs assembled liquid Zn-air battery exhibits a power density of 182 mW cm-2 and a long-term operation of 185 h. When assembled into solid-state cable type battery, this newly designed catalyst also reaches a stable open circuit voltage (1.359 V) and a peak power density of 85 mW cm-3. Our findings provide essential guidelines of engineering heterostructured electrocatalysts for future wearable electronic devices.
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