Enhancing the electrocatalytic activity of 2H-WS2 for hydrogen evolution via defect engineering
Literature Information
Publication Date
2019-02-21
DOI
10.1039/C9CP00722A
Impact Factor
3.676
Authors
Longfei Wu, Arno J. F. van Hoof, Nelson Y. Dzade, Lu Gao, Heiner Friedrich, Nora H. De Leeuw, Emiel J. M. Hensen, Jan P. Hofmann
View Original
Abstract
Transition metal dichalcogenides (TMDs), such as MoS2 and WS2, are promising alternative non-noble metal catalysts to drive the electrocatalytic H2 evolution reaction (HER). However, their catalytic performance is inherently limited by the small number of active sites as well as their poor electrical conductivity. Here, we grow vertically aligned 2H-WS2 on different substrates to expose their edge sites for the HER and introduce a scalable approach to tune these active sites via defect engineering. In a thermal hydrogen treatment procedure, sulfur vacancies and metallic tungsten nanoparticles are formed. The extent of desulfurization, and thus the HER activity, can be tuned via controlling the H2 annealing conditions. The obtained W/WS2−x electrocatalysts are evaluated experimentally and theoretically to arrive at a better understanding of how to modify the inherently inert 2H-WS2 for more efficient HER.
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Source Journal
Physical Chemistry Chemical Physics
CiteScore:
5.5
Self-citation Rate:
10.3%
Articles per Year:
3036
Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.
Recommended Compounds
![2,6-Di(thiophen-2-yl)dithieno[3,2-b:2',3'-d]thiophene structure](https://static.chemtradehub.com/structs/910/910788-24-8-5b70.webp "2,6-Di(thiophen-2-yl)dithieno[3,2-b:2',3'-d]thiophene structure")
2,6-Di(thiophen-2-yl)dithieno[3,2-b:2',3'-d]thiophene
CAS Number:
910788-24-8
Molecular Formula:
C16H8S5
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