电催化剂
沸石咪唑盐骨架
咪唑酯
电池(电)
催化作用
碳纤维
材料科学
氮气
铜
无机化学
阳极
多孔性
化学工程
化学
电极
金属有机骨架
电化学
冶金
物理化学
吸附
有机化学
复合材料
功率(物理)
工程类
物理
复合数
量子力学
作者
Wen‐Jun Niu,Qiaoqiao Sun,Jin‐Zhong He,Jiang‐Lei Chen,Bing‐Ni Gu,Mingjin Liu,Chia‐Chen Chung,Yang‐Chang Wu,Yu‐Lun Chueh
标识
DOI:10.1021/acs.chemmater.2c00350
摘要
Here, copper single atoms anchored on nitrogen-doped porous carbon (Cu-N/PC) derived from zeolitic imidazolate frameworks (ZIFs) as a highly efficient electrocatalyst for the oxygen reduction reaction (ORR) were demonstrated. Specifically, as a nitrogen-rich bridge molecule, tubular g-C3N4 (TCN) can trap free Cu ions through the electrostatic interaction in the initial stage. Then, Cu-ion-doped TCN can be used to regulate the content of copper and nitrogen doping, the electronic structure, as well as the specific surface area and pore diameter of Cu-N/PC. As a result, the high density of exposed Cu-N4 active sites and the high level of porosity in Cu-N/PC may significantly enhance the ORR activity with a more positive onset potential (E0 = 0.97 V versus reversible hydrogen electrode (RHE)) and half-wave potential (E1/2 = 0.88 V) than the commercially available Pt/C catalyst (E0 = 0.94 V, E1/2 = 0.85 V). Furthermore, the homemade Zn–air battery (ZAB) equipped with Cu-N/PC is able to deliver excellent performance, including a peak power density of 215.8 mW cm–2 and a specific capacity of 704.9 mAh g–1 based on Zn anode, outperforming the Pt/C catalyst. The finding highlights a new guideline for constructing Cu-N/PC catalyst with a well-designed structure and superior property for advanced fuel cell cathode materials.
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