Tuning electrochemical catalytic activity of defective 2D terrace MoSe 2 heterogeneous catalyst

Via cobalt doping

Xiaoshuang Chen, Yunfeng Qiu, Guangbo Liu, Wei Zheng, Wei Feng, Feng Gao, Wenwu Cao, Yongqing Fu, Wenping Hu, Pingan Hu

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

This study presents the successful growth of defective 2D terrace MoSe 2 /CoMoSe lateral heterostructures (LH), bilayer and multilayer MoSe 2 /CoMoSe LH, and vertical heterostructures (VH) nanolayers by doping metal cobalt (Co) element into MoSe 2 atomic layers to form a CoMoSe alloy at high temperatures (∼900 °C). After the successful introduction of metal Co heterogeneity in the MoSe 2 thin layers, more active sites can be created to enhance hydrogen evolution reaction (HER) activities combining with metal Co catalysis through mechanisms such as (1) atomic arrangement distortion in CoMoSe alloy nanolayers, (2) atomic level coarsening in LH interfaces and terrace edge layer architecture in VH, and (3) formation of defective 2D terrace MoSe 2 nanolayers heterogeneous catalyst via metal Co doping. The HER investigations indicated that the obtained products with LH and VH exhibited an improved HER activity in comparison with those from pristine 2D MoSe 2 electrocatalyst and LH type MoSe 2 /CoMoSe. The present work shows a facile yet reliable route to introduce metal ions into ultrathin 2D transition metal dichalcogenides (TMDCS) and produce defective 2D alloy atomic layers for exposing active sites, eventually improving their electrocatalytic performance.

Original languageEnglish (US)
Pages (from-to)11357-11363
Number of pages7
JournalJournal of Materials Chemistry A
Volume5
Issue number22
DOIs
StatePublished - Jan 1 2017

Fingerprint

Cobalt
Heterojunctions
Catalyst activity
Tuning
Doping (additives)
Catalysts
Metals
Hydrogen
Electrocatalysts
Coarsening
Chemical elements
Catalysis
Transition metals
Metal ions
Multilayers

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Chen, Xiaoshuang ; Qiu, Yunfeng ; Liu, Guangbo ; Zheng, Wei ; Feng, Wei ; Gao, Feng ; Cao, Wenwu ; Fu, Yongqing ; Hu, Wenping ; Hu, Pingan. / Tuning electrochemical catalytic activity of defective 2D terrace MoSe 2 heterogeneous catalyst : Via cobalt doping. In: Journal of Materials Chemistry A. 2017 ; Vol. 5, No. 22. pp. 11357-11363.
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abstract = "This study presents the successful growth of defective 2D terrace MoSe 2 /CoMoSe lateral heterostructures (LH), bilayer and multilayer MoSe 2 /CoMoSe LH, and vertical heterostructures (VH) nanolayers by doping metal cobalt (Co) element into MoSe 2 atomic layers to form a CoMoSe alloy at high temperatures (∼900 °C). After the successful introduction of metal Co heterogeneity in the MoSe 2 thin layers, more active sites can be created to enhance hydrogen evolution reaction (HER) activities combining with metal Co catalysis through mechanisms such as (1) atomic arrangement distortion in CoMoSe alloy nanolayers, (2) atomic level coarsening in LH interfaces and terrace edge layer architecture in VH, and (3) formation of defective 2D terrace MoSe 2 nanolayers heterogeneous catalyst via metal Co doping. The HER investigations indicated that the obtained products with LH and VH exhibited an improved HER activity in comparison with those from pristine 2D MoSe 2 electrocatalyst and LH type MoSe 2 /CoMoSe. The present work shows a facile yet reliable route to introduce metal ions into ultrathin 2D transition metal dichalcogenides (TMDCS) and produce defective 2D alloy atomic layers for exposing active sites, eventually improving their electrocatalytic performance.",
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Tuning electrochemical catalytic activity of defective 2D terrace MoSe 2 heterogeneous catalyst : Via cobalt doping. / Chen, Xiaoshuang; Qiu, Yunfeng; Liu, Guangbo; Zheng, Wei; Feng, Wei; Gao, Feng; Cao, Wenwu; Fu, Yongqing; Hu, Wenping; Hu, Pingan.

In: Journal of Materials Chemistry A, Vol. 5, No. 22, 01.01.2017, p. 11357-11363.

Research output: Contribution to journalArticle

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T1 - Tuning electrochemical catalytic activity of defective 2D terrace MoSe 2 heterogeneous catalyst

T2 - Via cobalt doping

AU - Chen, Xiaoshuang

AU - Qiu, Yunfeng

AU - Liu, Guangbo

AU - Zheng, Wei

AU - Feng, Wei

AU - Gao, Feng

AU - Cao, Wenwu

AU - Fu, Yongqing

AU - Hu, Wenping

AU - Hu, Pingan

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N2 - This study presents the successful growth of defective 2D terrace MoSe 2 /CoMoSe lateral heterostructures (LH), bilayer and multilayer MoSe 2 /CoMoSe LH, and vertical heterostructures (VH) nanolayers by doping metal cobalt (Co) element into MoSe 2 atomic layers to form a CoMoSe alloy at high temperatures (∼900 °C). After the successful introduction of metal Co heterogeneity in the MoSe 2 thin layers, more active sites can be created to enhance hydrogen evolution reaction (HER) activities combining with metal Co catalysis through mechanisms such as (1) atomic arrangement distortion in CoMoSe alloy nanolayers, (2) atomic level coarsening in LH interfaces and terrace edge layer architecture in VH, and (3) formation of defective 2D terrace MoSe 2 nanolayers heterogeneous catalyst via metal Co doping. The HER investigations indicated that the obtained products with LH and VH exhibited an improved HER activity in comparison with those from pristine 2D MoSe 2 electrocatalyst and LH type MoSe 2 /CoMoSe. The present work shows a facile yet reliable route to introduce metal ions into ultrathin 2D transition metal dichalcogenides (TMDCS) and produce defective 2D alloy atomic layers for exposing active sites, eventually improving their electrocatalytic performance.

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