Patchwork-Structured Heterointerface of 1T-WS2/a-WO3 with Sustained Hydrogen Spillover as a Highly Efficient Hydrogen Evolution Reaction Electrocatalyst

• DOI: 10.1021/acsami.2c03584
• Publication Date: 2022-05-13T10:54:17Z
• Authors: Jinill Cho; Minjun Kim; Hyunho Seok; Gwan Hyun Choi; Seong Soo Yoo; N. Clament Sagaya...; Pil J. Yoo; Taesung Kim
• Keywords: Overpotential; Tungsten disulfide; Proton Transport; Nanocrystalline material

Using tungsten disulfide (WS2) as a hydrogen evolution reaction (HER) electrocatalyst brought on several ways to surpass its intrinsic catalytic activity. This study introduces nanodomain oxide (WO3) interface 1T-WS2, opening new route for facilitating the transfer of proton active sites, thereby enhancing HER performance. After H2S plasma sulfurization W layer realize nanocrystalline subsequent O2 treatment led formation amorphous WO3 (a-WO3), resulting in patchwork-structured heterointerface 1T-WS2/a-WO3 (WSO). Addition hydrophilic facilitates spillover effect, which represents absorbed protons from a-WO3 1T-WS2. Moreover, faster response cathodic current peak (proton insertion) cyclic voltammetry is confirmed by higher degree oxidation. The rationale behind insertion that introduced works channel. As result, WSO-1.2 (the ratio 1T-WS2 a-WO3) exhibits remarkable activity consumes more provided channel, showing an overpotential 212 mV at 10 mA/cm2. Density functional theory calculations also show phase gives binding energies initial adsorption, while shows reduced overpotential. improved performance demonstrates novel strategy water splitting actively elicit related via efficient transport.