Ru-incorporated Co3O4 nanoparticles from self-sacrificial ZIF-67 template as efficient bifunctional electrocatalysts for rechargeable metal-air battery

被引：78

作者：

Huang, Changfei ^{[1
]}

Ji, Qianqian ^{[1
]}

Zhang, Hongliang ^{[1
]}

Wang, Yating ^{[1
]}

Wang, Shuoming ^{[1
]}

Liu, Xuehua ^{[1
]}

Guo, Youmin ^{[2
]}

Zhang, Chuanhui ^{[1
]}

机构：

[1] Qingdao Univ, Coll Mat Sci & Engn, Inst Mat Energy & Environm, Qingdao 266071, Peoples R China

[2] Anhui Univ, Sch Phys & Mat Sci, Hefei 230601, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 606卷

基金：

中国国家自然科学基金;

关键词：

Zinc-air battery; Extrinsic metal incorporation; Bifunctional electrocatalyst; Lattice distortion; Oxygen vacancy; OXYGEN REDUCTION REACTION; ORGANIC FRAMEWORK; DOPED CARBON; COBALT; CATALYSTS; NANOSHEETS; GRAPHENE; CATHODE; OXIDE; POLYHEDRA;

D O I：

10.1016/j.jcis.2021.08.046

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ru-incorporated Co3O4 nanoparticles have been synthesized from self-sacrificial ZIF-67 template and utilized as efficient electrocatalysts towards oxygen reduction and evolution reactions (ORR and OER). Amongst, Ru@Co3O4-1.0 exhibited the optimum electrocatalytic behavior with an ultra-low potential gap (0.84 V) between the OER potential (1.61 V at 10 mA cm(-2)) and ORR half-wave potential (0.77 V). The zinc-air battery using Ru@Co3O4-1.0 as a cathode presented high specific capacity (788.1 mAh g(-1)) and power density (101.2 mW cm(-2)). Meanwhile, this battery possessed relatively lower voltage gap and higher cycling stability compared with the commercial Pt/C-based one. Ruthenium incorporation induced remarkable lattice expansion of Co3O4 and engineered more oxygen vacancies, promoting the lattice oxygen mobility from the subsurface/bulk phase onto surface. All these properties were recognized to be the crucial parameters for electrocatalytic activity improvement. This work provided a facile approach to design highly active metal oxide with broad potentiality for rechargeable metal-air batteries. (C) 2021 Elsevier Inc. All rights reserved.

引用

页码：654 / 666

页数：13

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