Edge-rich MoS2 Naonosheets Rooting into Polyaniline Nanofibers as Effective Catalyst for Electrochemical Hydrogen Evolution. (20th October 2015)

• Record Type: Journal Article
• Authors: Zhang, Nan; Ma, Weiguang; Wu, Tongshun; Wang, Haoyu; Han, Dongxue; Niu, Li
• Is Part Of: Electrochimica acta. Volume 180(2015)
• Page Start: 155
• Page End: 163
• Publication Date: 2015-10-20
• Subjects: polyaniline -- integrative hybrid -- edge-rich -- MoS2 nanosheets -- hydrogen evolution reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.08.108
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: For the first time polyaniline (PANI) was employed as an admirable substrate to construct the hierarchical integrative hybrid with MoS2 (MoS2 /PANI) for hydrogen evolution reaction (HER), which achieved great active edges exposure and excellent HER performance. Highlights: PANI is first applied as the support of MoS2 for enhanced HER performance. Great active edges exposure of the hybrid significantly benefits the HER activity. Superior HER activity and excellent stability of MoS2 /PANI have been achieved. Abstract: Conductive polymer polyaniline (PANI) with abundant protonated sites which are beneficial to hydrogen evolution reaction (HER), was applied as the support of MoS2 for enhanced HER performance for the first time. The novel three dimensional (3D) HER catalyst (MoS2 /PANI) was constructed with two dimensional (2D) MoS2 building blocks rooting into the integrative nanowires. PANI nanofibers acted as excellent substrates for the uniform, dense and approximate vertical growth of MoS2 nanosheets exposing abundant active edges. Consequently, excellent HER performance has been achieved with a low onset overpotential of 100 mV and a small Tafel slope of 45 mV dec −1 . Most importantly, it only needed 200 and 247 mV overpotential to reach the current density of 30 and 100 mA/cm 2 respectively. Additionally, MoS2 /PANI has achieved superior stability over other MoS2 -polymer-based HER electrocatalyst. In general, for the first time, employing PANI for the construction of the edge-rich integrative hybrid has successfully achieved an outstanding HER performance.