双功能
电催化剂
电池(电)
析氧
电解质
阴极
催化作用
化学
材料科学
电化学
化学工程
纳米复合材料
无机化学
纳米技术
电极
有机化学
工程类
功率(物理)
物理化学
物理
量子力学
作者
Zexing Wu,Hengbo Wu,Tengfei Niu,Shuai Wang,Gengtao Fu,Wei Jin,Tianyi Ma
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-05-26
卷期号:8 (24): 9226-9234
被引量:79
标识
DOI:10.1021/acssuschemeng.0c03570
摘要
The development and rational design of highly efficient and Earth-abundant bifunctional nanomaterials for electrocatalytic oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) act as pivotal roles for the practical applications of rechargeable metal–air batteries. In this article, a Ni–Co-derived metal–organic framework (Ni–Co–MOF) is rapidly formed at ambient temperature, followed by a low-temperature sulfuration process to obtain Ni–Co-based sulfides couple with a nitrogen (N) and sulfur (S)-codoped carbon support with a porous structure (Ni–Co–S/NSC). The designed Ni–Co–S/NSC presents excellent electrocatalytic performances for OER (10 mA cm–2 @309 mV) and ORR (0.81 V @ E1/2) and a small ΔE (ΔE = Ej10 – E1/2) of 0.73 V in an alkaline electrolyte, enabling its use as an outstanding cathode in rechargeable Zn–air batteries. In situ Raman spectra demonstrated that metal hydroxides formed during OER endowed the obtained electrocatalyst with a predominant catalytic performance. Impressively, a homemade rechargeable Zn–air battery composed by this nanocomposite as the cathode delivered remarkable properties with a peak power density of 137 mW cm–2 and a high specific capacity of 829 mAh g–1. The battery also demonstrated outstanding long-term stability with a well-maintained porous structure and crystal structure.
科研通智能强力驱动
Strongly Powered by AbleSci AI