亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

The effect of heteroatoms doping for the Pt supported graphene hollow spheres on electrocatalytic properties towards oxygen reduction and hydrogen evolution reaction

塔菲尔方程 杂原子 石墨烯 催化作用 电解质 材料科学 贵金属 化学工程 可逆氢电极 限制电流 金属 纳米技术 化学 无机化学 电化学 电极 冶金 物理化学 工作电极 有机化学 工程类 戒指(化学)
作者
Hong Yun Huang,Zhongqing Jiang,Xiaoning Tian,Yingying Zheng,Zhong‐Jie Jiang
出处
期刊:International Journal of Hydrogen Energy [Elsevier BV]
卷期号:48 (9): 3385-3401 被引量:19
标识
DOI:10.1016/j.ijhydene.2022.10.194
摘要

Noble metal Pt is the acknowledged efficient catalyst for oxygen reduction (ORR) and hydrogen evolution reaction (HER) in commercial applications. However, due to its high price and limited reserves, its large-scale application is limited. In order to overcome this defect, the loaded Pt nanoparticles (NPs) should be small and dispersed efficiently through the design of electrode materials, so as to improve the utilization efficiency of Pt. In addition, the introduction of non-noble metal active sites can reduce the consumption of Pt efficiently. In this work, hollow graphene spheres are used as the carrier and the heteroatoms (N, Fe and Co) are introduced. The results show that the introduction of Fe and Co can form very effective heteroatom active sites (carbon encapsulated Fe/Co metals and FeCo alloy, and/or metal nitrides Fe/Co-Nx-C) in the substrate material, which improve the catalytic activity of the electrode material effectively and the utilization efficiency of Pt. In addition, the generation of Fe/Co-Nx-C active sites and the loading of Pt are also closely related to the doped N atoms. The onset potential, limiting current density (JL), half-wave potential (E1/2) and Tafel slope of sample FeCo-NxHGSs/Pt (10 wt%) can exceed or comparable to those of commercial catalysts Pt/C (20 wt%) towards ORR both in acid and alkaline electrolyte. Moreover, the values of η100 and the Tafel slope for FeCo-NxHGSs/Pt towards HER can also exceed the commercial catalysts Pt/C (20 wt%) in acid and alkaline electrolytes. The purpose of reducing the usage amount of precious metals without reducing the catalytic performance is realized. The relationship between the ORR and HER performance of the resultant electrode catalyst and the doped heteroatoms, such as nitrogen (N), iron (Fe) and cobalt (Co) atoms, was studied and discussed in detail.
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
量子星尘发布了新的文献求助10
12秒前
机灵自中发布了新的文献求助10
35秒前
机灵自中完成签到,获得积分10
52秒前
执着的草丛完成签到,获得积分10
1分钟前
1分钟前
Anna完成签到 ,获得积分10
1分钟前
1分钟前
绝世冰淇淋完成签到 ,获得积分10
1分钟前
科研通AI5应助科研通管家采纳,获得50
1分钟前
breeze完成签到,获得积分10
1分钟前
量子星尘发布了新的文献求助10
1分钟前
1分钟前
顺心蜜粉给远航的求助进行了留言
1分钟前
silence发布了新的文献求助10
1分钟前
zhanglq发布了新的文献求助10
1分钟前
silence完成签到,获得积分10
2分钟前
CipherSage应助zhaoaotao采纳,获得10
2分钟前
2分钟前
2分钟前
zhaoaotao发布了新的文献求助10
2分钟前
科研通AI5应助祖之微笑采纳,获得10
2分钟前
zhaoaotao完成签到,获得积分10
2分钟前
2分钟前
量子星尘发布了新的文献求助10
2分钟前
2分钟前
隐形曼青应助Master采纳,获得10
2分钟前
3分钟前
科研通AI5应助小嘉采纳,获得10
3分钟前
3分钟前
小嘉发布了新的文献求助10
3分钟前
大个应助哈尔滨采纳,获得10
3分钟前
英姑应助科研通管家采纳,获得10
3分钟前
郗妫完成签到,获得积分10
3分钟前
顺心蜜粉完成签到,获得积分10
3分钟前
3分钟前
Master发布了新的文献求助10
3分钟前
英俊的铭应助Magali采纳,获得10
3分钟前
4分钟前
4分钟前
祖之微笑发布了新的文献求助10
4分钟前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
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 3976649
求助须知:如何正确求助?哪些是违规求助? 3520756
关于积分的说明 11204743
捐赠科研通 3257502
什么是DOI,文献DOI怎么找? 1798733
邀请新用户注册赠送积分活动 877897
科研通“疑难数据库(出版商)”最低求助积分说明 806629