MoS2 and WS2 nanocone arrays: Impact of surface topography on the hydrogen evolution electrocatalytic activity and mass transport

被引：35

作者：

Escalera-Lopez, Daniel ^{[1
,2
]}

Griffin, Ross ^{[2
]}

Isaacs, Mark ^{[3
]}

Wilson, Karen ^{[3
,4
]}

Palmer, Richard E. ^{[5
]}

Rees, Neil V. ^{[1
]}

机构：

[1] Univ Birmingham, Sch Chem Engn, Ctr Hydrogen & Fuel Cell Res, Birmingham B15 2TT, W Midlands, England

[2] Univ Birmingham, Sch Phys & Astron, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, England

[3] Aston Univ, European Bioenergy Res Inst, Birmingham B4 7ET, W Midlands, England

[4] RMIT Univ, Sch Sci, 124 La Trobe St, Melbourne, Vic 3000, Australia

[5] Swansea Univ, Coll Engn, Bay Campus,Fabian Way, Swansea SAL 8EN, W Glam, Wales

来源：

APPLIED MATERIALS TODAY | 2018年 / 11卷

基金：

英国工程与自然科学研究理事会;

关键词：

Transition metal dichalcogenides; Hydrogen evolution; Nanoelectrode array; Plasma etching; AMORPHOUS MOLYBDENUM SULFIDE; TRANSITION-METAL DICHALCOGENIDES; ELECTRON-TRANSFER KINETICS; DEFECT-RICH MOS2; HIGH-PERFORMANCE; NANOELECTRODE ARRAYS; CYCLIC VOLTAMMETRY; CATALYTIC-ACTIVITY; ORDERED ARRAYS; EDGE SITES;

D O I：

10.1016/j.apmt.2018.01.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the fabrication and electrochemical study of edge-abundant transition metal dichalcogenide (TMD) nanocone arrays. Time-dependent etching by sequential use of isotropic O-2 and anisotropic SF6/C4F8 plasmas on nanosphere monolayer-modified TMD crystals results in very high coverage nanocone array structures with tunable aspect ratios and interspacings. Electrochemical characterization of these arrays via the hydrogen evolution reaction (HER), using a low proton concentration electrolyte (2 mM HClO4, 0.1 M NaClO4) to reveal morphology-dependent mass transport features at the proton diffusion-controlled region, show significant changes in electrocatalytic behaviour at both WS2 and MoS2: notably onset potential shifts of 100 and 200 mV, and Tafel slope decreases of 50 and 120 mV dec(-1) respectively. These improvements vary according to the geometry of the arrays and the availability of catalytic edge sites, and thus the observed electrochemical behaviour can be rationalized via kinetic and mass transport effects. (C) 2018 The Authors. Published by Elsevier Ltd.

引用

页码：70 / 81

页数：12

共 83 条

[1] CHARGE-TRANSFER AT PARTIALLY BLOCKED SURFACES - A MODEL FOR THE CASE OF MICROSCOPIC ACTIVE AND INACTIVE SITES
AMATORE, C
SAVEANT, JM
TESSIER, D
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 147 (1-2) : 39 - 51
[2] 2H → 1T phase transition and hydrogen evolution activity of MoS2, MoSe2, WS2 and WSe2 strongly depends on the MX2 composition
Ambrosi, Adriano
Sofer, Zdenek
Pumera, Martin
[J]. CHEMICAL COMMUNICATIONS, 2015, 51 (40) : 8450 - 8453
[3] Role of reaction kinetics and mass transport in glucose sensing with nanopillar array electrodes
Anandan V.
Yang X.
Kim E.
Rao Y.L.
Zhang G.
[J]. Journal of Biological Engineering, 1 (1)
[4] Nanoelectrodes, nanoelectrode arrays and their applications
Arrigan, DWM
[J]. ANALYST, 2004, 129 (12) : 1157 - 1165
[5] Audi AA, 2000, SURF INTERFACE ANAL, V29, P265, DOI 10.1002/(SICI)1096-9918(200004)29:4<265::AID-SIA739>3.0.CO
[6] 2-3
[7] Bard A. J., 2001, ELECTROCHEMICAL METH, DOI [10.1016/B978-0-12-81373-2.00056-9, DOI 10.1016/B978-0-12-81373-2.00056-9]
[8] Enhanced Mass Transport of Electroactive Species to Annular Nanoband Electrodes Embedded in Nanocapillary Array Membranes
Branagan, Sean P.
Contento, Nicholas M.
Bohn, Paul W.
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (20) : 8617 - 8624
[9] An XPS study of the surface modification of natural MoS2 following treatment in an RF-oxygen plasma
Brown, NMD
Cui, NY
McKinley, A
[J]. APPLIED SURFACE SCIENCE, 1998, 134 (1-4) : 11 - 21
[10] Electrocatalytic regeneration of atmospherically aged MoS2 nanostructures via solution-phase sulfidation
Burch, H. A.
Isaacs, M.
Wilson, K.
Palmer, R. E.
Rees, N. V.
[J]. RSC ADVANCES, 2016, 6 (32): : 26689 - 26695

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