Molecular Functionalization of 2H-Phase MoS2 Nanosheets via an Electrolytic Route for Enhanced Catalytic Performance

材料科学 表面改性 催化作用 分子 苯胺 电解质 化学工程 相(物质) 无机化学 纳米技术 有机化学 电极 物理化学 化学 工程类
作者
Sergio García‐Dalí,J.I. Paredes,S. Villar–Rodil,A. Martínez-Jódar,A. Martı́nez-Alonso,J.M.D. Tascón
出处
期刊:ACS Applied Materials & Interfaces [American Chemical Society]
卷期号:13 (28): 33157-33171 被引量:14
标识
DOI:10.1021/acsami.1c08850
摘要

The molecular functionalization of two-dimensional MoS2 is of practical relevance with a view to, for example, facilitating its liquid-phase processing or enhancing its performance in target applications. While derivatization of metallic 1T-phase MoS2 nanosheets has been relatively well studied, progress involving their thermodynamically stable, 2H-phase counterpart has been more limited due to the lower chemical reactivity of the latter. Here, we report a simple electrolytic strategy to functionalize 2H-phase MoS2 nanosheets with molecular groups derived from organoiodides. Upon cathodic treatment of a pre-expanded MoS2 crystal in an electrolyte containing the organoiodide, water-dispersible nanosheets derivatized with acetic acid or aniline moieties (∼0.10 molecular groups inserted per surface sulfur atom) were obtained. Analysis of the functionalization process indicated it to be enabled by the external supply of electrons from the cathodic potential, although they could also be sourced from a proper reducing agent, as well as by the presence of intrinsic defects in the 2H-phase MoS2 lattice (e.g., sulfur vacancies), where the molecular groups can bind. The acetic acid-functionalized nanosheets were tested as a non-noble metal-based catalyst for nitroarene and organic dye reduction, which is of practical utility in environmental remediation and chemical synthesis, and exhibited a markedly enhanced activity, surpassing that of other (1T- or 2H-phase) MoS2 materials and most non-noble metal catalysts previously reported for this application. The reduction kinetics (reaction order) was seen to correlate with the net electric charge of the nitroarene/dye molecules, which was ascribed to the distinct abilities of the latter to diffuse to the catalyst surface. The functionalized MoS2 catalyst also worked efficiently at realistic (i.e., high) reactant concentrations, as well as with binary and ternary mixtures of the reactants, and could be immobilized on a polymeric scaffold to expedite its manipulation and reuse.
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
乖猫要努力应助momo采纳,获得10
1秒前
诚心问筠完成签到,获得积分10
1秒前
云泥完成签到,获得积分10
3秒前
3秒前
隐形曼青应助okface采纳,获得10
4秒前
zhang完成签到,获得积分10
5秒前
hopen完成签到 ,获得积分10
6秒前
丘比特应助SS采纳,获得10
8秒前
月亮moon完成签到,获得积分10
8秒前
9秒前
充电宝应助qqq采纳,获得10
12秒前
顾矜应助lihan采纳,获得10
12秒前
爆米花应助周em12_采纳,获得10
13秒前
14秒前
三物完成签到 ,获得积分10
15秒前
jolt发布了新的文献求助10
16秒前
18秒前
18秒前
19秒前
momo发布了新的文献求助10
20秒前
量子星尘发布了新的文献求助30
20秒前
21秒前
22秒前
22秒前
善学以致用应助笃定采纳,获得30
23秒前
SS发布了新的文献求助10
25秒前
25秒前
ZZZ发布了新的文献求助10
25秒前
Justtry发布了新的文献求助20
27秒前
27秒前
顾矜应助momo采纳,获得10
28秒前
28秒前
hnlgdx发布了新的文献求助20
28秒前
30秒前
重要冷之完成签到,获得积分20
30秒前
30秒前
33秒前
VV完成签到,获得积分10
33秒前
ccalvintan发布了新的文献求助10
34秒前
蛋挞发布了新的文献求助10
35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 3989297
求助须知:如何正确求助?哪些是违规求助? 3531418
关于积分的说明 11253893
捐赠科研通 3270097
什么是DOI,文献DOI怎么找? 1804884
邀请新用户注册赠送积分活动 882087
科研通“疑难数据库(出版商)”最低求助积分说明 809158