Large-scale fabrication of a flexible, highly conductive composite paper based on molybdenum disulfide–Pt nanoparticle–single-walled carbon nanotubes for efficient hydrogen production

Abstract

Creating efficient hydrogen production properties from the macroscopic assembly of two-dimensional materials is still an unaccomplished goal. Here we report a facile route to fabricate a flexible MoS/PtNPs/SWCNT paper with an ultralow onset potential of -35 mV, a Tafel slope of 39.6 mV per decade and over 60 h of electrochemical durability.

Enhanced Electrocatalytic Hydrogen Evolution Activity in Single-Atom Pt-Decorated VS2 Nanosheets

“…To understand the effect of different Pt species in VS 2 on their HER activity, the linear sweep voltammetry (LSV) curves of Pt/VS 2 /CPs were measured in comparison with pure CP, pure VS 2 /CP, and 20% Pt/C catalyst. As shown in Figure a, the CP without VS 2 NSs exhibits nearly no HER activity, which is consistent with previous studies. ,, Pristine VS 2 /CP without Pt atom anchoring shows improvement in activity, but it is still not as good as the 20% Pt/C catalyst. It is noted that, after anchoring Pt structures, the HER activity significantly enhances before 1Pt/VS 2 /CP, in which the Pt SAs or clusters are atomically dispersed on VS 2 NSs.…”

“…As shown in Figure 4a, the CP without VS 2 NSs exhibits nearly no HER activity, which is consistent with previous studies. 9,21,35 Pristine VS 2 /CP without Pt atom anchoring shows improvement in activity, but it is still not as good as the 20% Pt/C catalyst. It is noted that, after anchoring Pt structures, the HER activity significantly enhances before 1Pt/VS 2 /CP, in which the Pt SAs or clusters are atomically dispersed on VS 2 NSs.…”

Integration of Ultrathin MoS2/PANI/CNT Composite Paper in Producing All-Solid-State Flexible Supercapacitors with Exceptional Volumetric Energy Density

“…Carbon nanotubes (CNTs) offer superior electrical conductivity, mechanical properties, and chemical stability, but the charge storage capabilities are limited. − Thanks to expeditious developments in the synthesis of high-quality CNTs and scaling-up techniques, breakthroughs in developing thin, conductive, flexible composite films for practical applications have significantly accelerated over the past few years. Hence, an alternative way to overcome the problem of the low electrical conductivity of MoS 2 is the addition of one-dimensional high-quality CNTs to the thin MoS 2 sheets. , When the surfaces of the sheets come in contact with CNTs, the sheets can possibly store much more energy.…”

“…Hence, an alternative way to overcome the problem of the low electrical conductivity of MoS 2 is the addition of one-dimensional high-quality CNTs to the thin MoS 2 sheets. 21,22 When the surfaces of the sheets come in contact with CNTs, the sheets can possibly store much more energy.…”

Insertion of Platinum Nanoparticles into MoS2 Nanoflakes for Enhanced Hydrogen Evolution Reaction

“…From the high resolution Pt 4f XPS peaks shown in Figure 5 e, characteristic peaks of Pt 4f 7/2 , Pt 4f 5/2 at 71.2 eV and 74.6 eV, respectively, should be attributed to metallic Pt nanoparticles. The Pt 4f peak shows two shoulders on the high binding energy side of the Pt 4f 5/2 and Pt 4f 7/2 peaks at a binding energy of 75.2 eV and 72.1 eV, which can be assigned to the Pt atoms linked to the oxygen and sulfur atoms respectively [ 39 , 40 ]. The formation of Pt–S bond can cause sulfur vacancies, and then enhance the catalytic activity of MoS 2 inner planes [ 29 , 41 , 42 ].…”