Premium
Enhanced Electrochemical H 2 Evolution by Few‐Layered Metallic WS 2(1− x ) Se 2 x Nanoribbons
Author(s) -
Wang Fengmei,
Li Jinshan,
Wang Feng,
Shifa Tofik Ahmed,
Cheng Zhongzhou,
Wang Zhenxing,
Xu Kai,
Zhan Xueying,
Wang Qisheng,
Huang Yun,
Jiang Chao,
He Jun
Publication year - 2015
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201502680
Subject(s) - overpotential , tafel equation , materials science , ternary operation , electrocatalyst , platinum , metal , electrochemistry , catalysis , transition metal , water splitting , nanotechnology , chemistry , metallurgy , electrode , programming language , biochemistry , computer science , photocatalysis
As an effective alternative to noble platinum electrocatalyst, earth abundant and inexpensive layered transition metal dichalcogenides (TMDs) are investigated for the hydrogen evolution reaction (HER). Compared with binary TMDs, the tunably composed ternary TMDs have hitherto received relatively little attention. Here, few‐layered ternary WS 2(1− x ) Se 2 x nanoribbons (NRs) with metallic 1T phases, much more catalytically active in HER, are prepared for the first time. The favorable Δ G H o introduced by the tensile region on the surface, along with the presence of local lattice distortions of the WS 2(1− x ) Se 2 x nanoribbons with metallic 1T phases, greatly promotes the HER process. These ternary NRs achieve the lowest overpotential of ≈0.17 V at 10 mA cm −2 and a Tafel slope of ≈68 mV dec −1 at a low catalyst loading (≈0.30 ± 0.02 mg cm −2 ). Notably, the long‐term durability suggests the potential of practical applications in acid electrolytes. The results here suggest that the ternary WS 2(1− x ) Se 2 x NRs with 1T phases are prominent alternatives to platinum‐based HER electrocatalysts.