Published on June 2021 | Electrocatalysis

Fe and P Doped 1T-Phase Enriched WS23D-Dendritic Nanostructures for Efficient Overall Water Splitting

1T-WS2 is known for its higher hydrogen evolution reaction (HER) performance than 2H-WS2. However, the lack of thermodynamic stability and absence of large-scale synthesis procedures kept 1T-WS2 significantly ignored to date. In this report, for the first time, we have fabricated 1T-WS2 in 3D-dendritic nanostructures over flexible carbon cloth (CC) following doping and intercalation of Fe and P (1T-Fe/P-WS2@CC). The HER and OER activities of 1T-Fe/P-WS2@CC outperform state-of-the-art electrocatalysts, demonstrating a low overpotential (ηHER =116 mV, ηOER =267 mV @ 10 mA cm−2), small Tafel slope (HER =65 mV dec-1, OER =70.1 mV dec-1), and significant durability. The 1T-Fe/P-WS2@CC (+,−) alkaline elctrolyzer also shows exceptional high performance, required only 1.53 V cell voltage at the current density of 10 mA cm−2. Overall, this work opens up a new dimension for simple and scalable fabrication of highly efficient and low-cost electrocatalyst based on WS2.