Substituent effects of symmetric cobalt porphyrins using graphene oxide as substrate on catalytic oxygen reduction reactions

卟啉 取代基 石墨烯 催化作用 电子转移 化学 电化学 咔唑 光化学 基质(水族馆) 无机化学 电极 材料科学 药物化学 有机化学 物理化学 纳米技术 海洋学 地质学
作者
Rui Yuan,Long Zhao,Yuqin Wei,Yan Chen,Mengran Tang,Zhaoli Xue,Aijian Wang,Jianming Zhang
出处
期刊:Colloids and Surfaces A: Physicochemical and Engineering Aspects [Elsevier BV]
卷期号:640: 128499-128499 被引量:8
标识
DOI:10.1016/j.colsurfa.2022.128499
摘要

Three symmetric cobalt porphyrins with different electron-donating substituents benzyl, triphenylamine-carbazole and carbazole at their meso -positions, nominated as Bz-CoPor , Cb-CoPor and TPACb-CoPor , respectively, were selected to dope onto graphene oxide (GO) as the electrocatalysts to check the substituent effects on oxygen reduction reaction (ORR). The spectroscopic characterization of the composites suggests there is strong electronic coupling between porphyrin and GO. The substituent effects of porphyrins on ORR are examined using a series of electrochemical measurements, suggesting that the reduction potential, diffusion-limited current density and the electron transfer number as well as the H 2 O 2 generation yield can be strongly influenced by the porphyrin structure in acidic medium. Rotating ring-disk electrode (RRDE) tests suggest that TPACb-CoPor/GO exhibits the largest electron transfer number of 3.8 with the lowest H 2 O 2 generation yield of 9% within the three porphyrin/GO models. Our findings suggest that the substituent effects of porphyrins on ORR can still function at the π-π interaction interfaces, and these symmetric cobalt porphyrins can undergo nearly 4-electron transfer path upon using GO as the substrate. • Three symmetric cobalt porphyrin-graphene oxide composites are fabricated. • The catalyst composites are studied in electrocatalytic oxygen reduction reaction. • Substituents of porphyrins show strong effect on the ORR activity. • The electron transfer numbers of all electrocatalysts are greater than 3.5. • The best composite TPACb-CoPor/GO exhibits an n of 3.8 and H 2 O 2 % of 9%.
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
刚刚
CipherSage应助平常的紫蓝采纳,获得10
1秒前
2秒前
xixi很困完成签到 ,获得积分10
3秒前
5秒前
zcy发布了新的文献求助10
5秒前
5秒前
香蕉觅云应助云岫采纳,获得10
5秒前
5秒前
6秒前
全若之发布了新的文献求助10
7秒前
爆米花应助谷大喵唔采纳,获得10
8秒前
小马甲应助旺仔Mario采纳,获得10
8秒前
思源应助乘风采纳,获得10
8秒前
PT177245发布了新的文献求助10
9秒前
9秒前
11秒前
12秒前
12秒前
陈某关注了科研通微信公众号
13秒前
zcy完成签到,获得积分10
14秒前
EgoElysia关注了科研通微信公众号
14秒前
天天快乐应助未道采纳,获得10
15秒前
归尘发布了新的文献求助10
15秒前
16秒前
隐形曼青应助科研通管家采纳,获得10
16秒前
猪猪hero应助科研通管家采纳,获得10
16秒前
orixero应助科研通管家采纳,获得10
17秒前
情怀应助科研通管家采纳,获得10
17秒前
pluto应助科研通管家采纳,获得10
17秒前
17秒前
田様应助科研通管家采纳,获得10
17秒前
17秒前
香蕉觅云应助科研通管家采纳,获得10
17秒前
17秒前
pluto应助科研通管家采纳,获得10
17秒前
彭于彦祖应助科研通管家采纳,获得50
17秒前
科研通AI5应助科研通管家采纳,获得10
17秒前
坦率的匪应助科研通管家采纳,获得10
18秒前
18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 3988827
求助须知:如何正确求助?哪些是违规求助? 3531197
关于积分的说明 11252739
捐赠科研通 3269830
什么是DOI,文献DOI怎么找? 1804815
邀请新用户注册赠送积分活动 881915
科研通“疑难数据库(出版商)”最低求助积分说明 809028