Active hydrogen evolution on the plasma-treated edges of WTe2

Ning Ling, Shoujun Zheng, Yongjoon Lee, Mali Zhao, Eunah Kim, Suyeon Cho, Heejun Yang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The tuning catalytic functionality of transition metal dichalcogenides (TMDs) with multi-dimensional defects, such as interfaces (2D), edges (1D), and atomic vacancies (0D), is currently considered a promising strategy for energy applications. The pristine edges and plasma-treated basal planes of various TMDs have been extensively studied for practical hydrogen evolution reaction (HER). Here, we demonstrate active HER on the plasma-treated edges of semimetallic layered tungsten ditellurides (WTe2) using a microcell device. Atomic defects, substitutions, and new chemical bonds were locally induced on the basal plane and the edges of WTe2 by mild plasma treatment, leading to catalytically activated WTe2 for HER. The plasma treated WTe2 was characterized by Raman spectroscopy and x-ray photoemission spectroscopy. The local HER at the plasma-treated edges in the microcell device exhibited active electrocatalytic activity with an improved overpotential (325 mV at 10 mA/cm2) and Tafel slope (96 mV/dec), compared with pristine WTe2 (overpotential of 538 mV at 10 mA/cm2 and Tafel slope of 145 mV/dec). Our study proposes a novel strategy to tune the catalytic functionality with multi-dimensional defects for practical catalytic applications.

Original languageEnglish
Article number061108
JournalAPL Materials
Volume9
Issue number6
DOIs
StatePublished - 1 Jun 2021

Bibliographical note

Funding Information:
This work is supported by National Research Foundation of Korea (NRF) under Grant Nos. NRF-2020R1A2B5B02002548 and NRF-2018M3D1A1058793. S.C. acknowledges support from the National Research Foundation of Korea (NRF) under Grant No. NRF-2020R1A2C2003377.

Publisher Copyright:
© 2021 Author(s).

Fingerprint

Dive into the research topics of 'Active hydrogen evolution on the plasma-treated edges of WTe2'. Together they form a unique fingerprint.

Cite this