Enhanced oxygen reduction activity and stability of double-layer nitrogen-doped carbon catalyst with abundant Fe-Co dual-atom sites

催化作用 Atom(片上系统) 材料科学 双金属片 吸附 碳纤维 无机化学 结晶学 物理化学 化学 有机化学 计算机科学 嵌入式系统 复合数 复合材料
作者
Lei Zhang,Yuchen Dong,Lubing Li,Liting Wei,Jinzhan Su,Liejin Guo
出处
期刊:Nano Energy [Elsevier BV]
卷期号:117: 108854-108854 被引量:39
标识
DOI:10.1016/j.nanoen.2023.108854
摘要

The synergistic effect between metal atoms gives dual-atom catalysts superior catalytic performance to single-atom catalysts. Herein, we report a ZIF-derived double-layer Fe-Co dual-atom catalyst (D-FeCo-DAs-N-C) for oxygen reduction reaction (ORR). The formation of N3-Fe-Co-N3 Fe-Co dual-atom structure was confirmed by X-ray absorption spectroscopy. A ZIF-derived Zn/Co bimetallic double-layer structure was used as a host, and the guest Fe3+ ions were encapsulated to the cavities by dual solvent method to form the ZIF-derived Zn/Co/Fe trimetallic double-layer structure. During the pyrolysis process, part of the Fe3+ ions were reduced by the generated carbon and combined with adjacent Co atoms to form Fe-Co dual-atom catalyst. The special double-layer structure provided abundant active sites and stable coordination environment for Fe-Co dual-atom sites. The density functional theory calculation shows that Fe-Co dual-atom sites promote the accumulation of electrons, and regulate the adsorption free energy of reaction intermediates, leading to higher limit potential. The D-FeCo-DAs-N-C exhibits excellent ORR performance (E1/2 =0.927 V) and extraordinary stability in alkaline media. The ORR chronoamperometry test showed that the current maintained 94.18% of the initial value after 100 h. The catalytic activity and stability of D-FeCo-DAs-N-C are higher than those of single-atom and single-layer catalysts synthesized as control samples. In addition, the practical zinc-air battery using D-FeCo-DAs-N-C as cathodic catalyst showed a maximum power density of 259 mW cm−2, a specific capacity of 814 W h kg−1 at 10 mA cm−2, and a stability of 400 cycles without detectable attenuation for 200 h. Furthermore, this catalyst also exhibits excellent performance in flexible zinc-air battery with a maximum power density of 140.3 mW cm−2 and excellent mechanical flexibility.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
如约而至完成签到 ,获得积分10
1秒前
1秒前
2秒前
3秒前
3秒前
aifd完成签到,获得积分10
4秒前
4秒前
每天都在找完成签到,获得积分10
6秒前
6秒前
7秒前
淡烟流水发布了新的文献求助10
8秒前
8秒前
小李发布了新的文献求助30
9秒前
汉堡包应助明芬采纳,获得30
9秒前
爆米花应助彭栋采纳,获得10
9秒前
10秒前
10秒前
MeiyanZou完成签到 ,获得积分10
10秒前
13秒前
13秒前
潇湘雪月发布了新的文献求助10
14秒前
14秒前
14秒前
15秒前
感动黄豆发布了新的文献求助10
15秒前
hhhblabla应助东方红采纳,获得10
17秒前
Poker应助sb采纳,获得10
18秒前
Ginger发布了新的文献求助10
18秒前
吃骨头的猫完成签到,获得积分10
18秒前
小李完成签到,获得积分10
18秒前
18秒前
19秒前
明芬发布了新的文献求助30
21秒前
21秒前
Smile完成签到,获得积分10
21秒前
Chaoe完成签到,获得积分10
24秒前
建国发布了新的文献求助10
25秒前
闪闪w发布了新的文献求助10
28秒前
淡烟流水完成签到,获得积分10
28秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989115
求助须知:如何正确求助?哪些是违规求助? 3531367
关于积分的说明 11253688
捐赠科研通 3269986
什么是DOI,文献DOI怎么找? 1804868
邀请新用户注册赠送积分活动 882078
科研通“疑难数据库(出版商)”最低求助积分说明 809105