Engineering Atomic Sites via Adjacent Dual-Metal Sub-Nanoclusters for Efficient Oxygen Reduction Reaction and Zn-Air Battery

被引：67

作者：

Qi, Defeng ^{[1
,2
]}

Liu, Yifan ^{[3
]}

Hu, Min ^{[1
,2
]}

Peng, Xianyun ^{[1
,2
]}

Qiu, Yuan ^{[1
,2
]}

Zhang, Shusheng ^{[4
]}

Liu, Wei ^{[1
,2
]}

Li, Hongyi ^{[5
]}

Hu, Guangzhi ^{[6
]}

Zhuo, Longchao ^{[7
]}

Qin, Yongji ^{[1
,2
]}

He, Jia ^{[1
,2
]}

Qi, Gaocan ^{[8
]}

Sun, Jiaqiang ^{[9
]}

Luo, Jun ^{[1
,2
]}

Liu, Xijun ^{[1
,2
]}

机构：

[1] Tianjin Univ Technol, Sch Mat Sci & Engn, Inst New Energy Mat & Low Carbon Technol, Tianjin 300384, Peoples R China

[2] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin Key Lab Photoelect Mat & Devices, Tianjin 300384, Peoples R China

[3] Shenzhen Univ, Minist Educ & Guangdong Prov, Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China

[4] Zhengzhou Univ, Coll Chem, Zhengzhou 450000, Peoples R China

[5] Xinjiang Uygurs Autonomous Reg, Qualificat Prod Supervis & Inspect Inst Technol, Urumqi 830011, Peoples R China

[6] Yunnan Univ, Sch Ecol & Environm Sci, Inst Ecol Res & Pollut Control Plateau Lakes, Kunming 650504, Yunnan, Peoples R China

[7] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

[8] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

[9] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

来源：

SMALL | 2020年 / 16卷 / 48期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

air cathode; atomic clusters; bimetallic Cu‐ Zn; oxygen reduction reaction; Zn‐ air battery; ELECTROCATALYSTS; NANOPARTICLES; CATALYSTS; FE;

D O I：

10.1002/smll.202004855

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

N-coordinated transition-metal materials are crucial alternatives to design cost-effective, efficient, and highly durable catalysts for electrocatalytic oxygen reduction reaction. Herein, the synthesis of uniformly distributed Cu-Zn clusters on porous N-doped carbon, which are accompanied by Cu/Zn-N-x single sites, is demonstrated. X-ray absorption fine structure tests reveal the co-existence of M-N (M = Cu or Zn) and M-M bonds in the catalyst. The catalyst shows excellent oxygen reduction reaction (ORR) performance in an alkaline medium with a positive half-wave potential of 0.884 V, a superior kinetic current density of 36.42 mA cm(-2) at 0.85 V, and a Tafel slope of 45 mV dec(-1), all of which are among the best-reported results. Furthermore, when employed as an air cathode in Zn-Air battery, it reveals a high open-cycle potential of 1.444 V and a peak power density of 164.3 mW cm(-2). Comprehensive experiments and theoretical calculations approved that the high activity of the catalyst can be attributed to the collaboration of the Cu/Zn-N-4 sites with CuZn moieties on N-doped carbons.

引用

页数：8

共 52 条

[1] Markedly Enhanced Oxygen Reduction Activity of Single-Atom Fe Catalysts via Integration with Fe Nanoclusters [J].