Tungsten-based porous thin-films for electrocatalytic hydrogen generation

Huilong Fei, Yang Yang, Xiujun Fan, Gunuk Wang, Gedeng Ruan, James M. Tour

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Developing inexpensive and efficient electrocatalysts without using precious metals for the hydrogen evolution reaction (HER) is essential for the realization of economical clean energy production. Here we demonstrate a facile approach to access interconnected three-dimensional (3-D) porous tungsten-based (WS2 and WC) thin-films without using any templates. Benefiting from the 3-D open frameworks of these highly porous thin-films, there are enormous amounts of exposed active sites and efficient mass transport in favor of the HER. Both electrodes exhibit excellent catalytic activity towards HER with onset overpotentials of ∼100 mV for WS2 and ∼120 mV for WC, and similar Tafel slopes of ∼67 mV per decade. The long-term operation of these thin-film electrodes is confirmed by their electrochemical stability test. With the low loading mass (∼80 and ∼160 μg cm-2 for WS2 and WC, respectively), these porous thin-films are among the best tungsten-based HER electrocatalysts.

Original languageEnglish
Pages (from-to)5798-5804
Number of pages7
JournalJournal of Materials Chemistry A
Volume3
Issue number11
DOIs
Publication statusPublished - 2015 Mar 21

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ASJC Scopus subject areas

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

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