Tunable active edge sites in PtSe2films towards hydrogen evolution reaction

Shenghuang Lin, Yang Liu, Zhixin Hu, Wei Lu, Chun Hin Mak, Longhui Zeng, Jiong Zhao, Yanyong Li, Feng Yan, Yuen Hong Tsang, Xuming Zhang, Shu Ping Lau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

63 Citations (Scopus)

Abstract

Recent research effort on the development of effective hydrogen evolution reaction (HER) is to modulate the active edge sites through controlling surface structure at the atomic scale. Here we firstly demonstrate a facile strategy to synthesize large-area and edge-rich platinum diselenide (PtSe2) via selenization of Pt films by magnetron sputtering physical deposition method. The edge site density of the PtSe2can be effectively controlled by tuning the thickness of Pt films. The HER activity of the PtSe2can be enhanced significantly as the active edge site density increases. The maximum cathodic current density of 227 mA/cm2can be obtained through increasing the edge density, which well agrees with the density functional theory calculations. Our work provides a fundamental insight on the effect of active edge site density towards HER.
Original languageEnglish
Pages (from-to)26-33
Number of pages8
JournalNano Energy
Volume42
DOIs
Publication statusPublished - 1 Dec 2017

Keywords

  • Active sites
  • Hydrogen evolution reaction
  • Layered materials
  • PtSe 2

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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