Electrocatalysts for Zinc-Air Batteries Featuring Single Molybdenum Atoms in a Nitrogen-Doped Carbon Framework

被引：176

作者：

Balamurugan, Jayaraman ^{[1
]}

Austeria, P. Muthu ^{[2
,3
]}

Kim, Jun Beom ^{[1
]}

Jeong, Eun-Suk ^{[4
,5
]}

Huang, Hsin-Hui ^{[6
]}

Kim, Do Hwan ^{[2
,3
]}

Koratkar, Nikhil ^{[7
,8
]}

Kim, Sang Ouk ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol KAIST, Natl Creat Res Initiat Ctr Multidimens Directed Na, Dept Mat Sci & Engn, Daejeon 34141, South Korea

[2] Jeonbuk Natl Univ Jeonju, Div Sci Educ, Convers Engn Grad Sch, Jeonju 54896, South Korea

[3] Jeonbuk Natl Univ Jeonju, Inst Fus Sci, Convers Engn Grad Sch, Dept Energy Storage, Jeonju 54896, South Korea

[4] Jeonbuk Natl Univ Jeonju, Dept Phys Educ, Jeonju 54896, South Korea

[5] Jeonbuk Natl Univ Jeonju, Inst Fus Sci, Jeonju 54896, South Korea

[6] Japan Fine Ceram Ctr, Div Nanostruct Res Lab, 2-4-1 Mutsuno,Atsuta ku, Nagoya 4568587, Japan

[7] Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, 110 8th St, Troy, NY 12180 USA

[8] Rensselaer Polytech Inst, Dept Mat Sci & Engn, 110 8th St, Troy, NY 12180 USA

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 35期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

core-shell interface; interfacial engineering; oxygen evolution reaction; oxygen reduction reaction; single-atom catalysts; zinc-air batteries; OXYGEN REDUCTION REACTION; CATALYSTS; SITES; NANOPARTICLES; GRAPHENE; COBALT;

D O I：

10.1002/adma.202302625

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Bifunctional catalysts can facilitate two different electrochemical reactions with conflicting characteristics. Here, a highly reversible bifunctional electrocatalyst for rechargeable zinc-air batteries (ZABs) is reported featuring a "core-shell structure" in which N-doped graphene sheets wrap around vanadium molybdenum oxynitride nanoparticles. Single Mo atoms are released from the particle core during synthesis and anchored to electronegative N-dopant species in the graphitic shell. The resultant Mo single-atom catalysts excel as active oxygen evolution reaction (OER) sites in pyrrolic-N and as active oxygen reduction reaction (ORR) sites in pyridinic-N environments. ZABs with such bifunctional and multicomponent single-atom catalysts deliver high power density (& AP;376.4 mW cm(-2)) and long cycle life of over 630 h, outperforming noble-metal-based benchmarks. Flexible ZABs that can tolerate a wide range of temperatures (-20 to 80 & DEG;C) under severe mechanical deformation are also demonstrated

引用

页数：10

共 48 条

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