P‐doped MoS₂/Ni₂P/Ti₃C₂T_x heterostructures for efficient hydrogen evolution reaction in alkaline media

Abstract

By combining the advantages of doping to change the electronic structure of molybdenum disulfide (MoS 2 ), transition metal phosphides, and MXene, we proposed the idea of designing and preparing a new type of composite material, P-doped MoS 2 /Ni 2 P/Ti 3 C 2 T x heterostructures (denoted as P@MNTC), to serve as the hydrogen evolution reaction (HER) catalyst of electrochemical water splitting. The as-prepared P@MNTC heterostructures show a significant HER activity with an overpotential of 120 mV at 10 mA cm -2 in alkaline electrolyte, with decreasing 105 and 125 mV compared with those of MoS 2 and MXene, respectively. The density functional theory indicates that the P doping and synergy effect of Ti 3 C 2 T x can enhance the activation of MoS 2 and thus promote dissociation and absorption of H 2 O during HER process. This strategy provides a promising way to develop high-efficiency MoS 2 -and Ti 3 C 2 T x -based composite catalysts for alkaline HER.

K Intercalation-Assisted Co-Doped MoS2 Nanoflowers for an Efficient Hydrogen Evolution Reaction

“…It has the potential for use in a broad range of applications. − Among various H 2 generation technologies, electrochemical water hydrolysis enabled by renewable energy shows great promise for ecofriendly hydrogen production. Pt-based catalysts are currently the state-of-art electrocatalysts for electrocatalytic hydrogen evolution. , However, due to their rarity and exorbitant cost, large-scale implementation of water splitting remains extremely challenging. , As a promising alternative, 2D transition metal disulfides have garnered considerable attention as cost-effective and Earth-abundant electrocatalysts for hydrogen production. , …”

“…6,7 As a promising alternative, 2D transition metal disulfides have garnered considerable attention as cost-effective and Earth-abundant electrocatalysts for hydrogen production. 8,9 Molybdenum disulfides (MoS 2 ) is a material with stacked layers bound together by van der Waals force, possessing a near zero free energy of H adsorption similar to Pt-like catalysts. 10,11 However, both experimental and theoretical research studies have shown that the inert basal plane and large bandgap limit the electron transfer rate, hindering the improvement of intrinsic activity.…”

P–Nb4C3Tx Nanosheets Fabricated by a Low-Temperature Phosphating Process as Electrocatalysts for Electrochemical Water Splitting

“…19 Dang et al reported that the P-doped MoS 2 /Ni 2 P/Ti 3 C 2 T x heterostructures serving as the HER catalyst show a significant HER activity with an overpotential of 120 mV to 10 mA cm −2 in the alkaline electrolyte. 20 Xu's team recorded that the incorporation in P element could enhance the HER properties of Mo 2 CT x MXene. 21 Lee et al obtained nitrogen-doped Ti 3 C 2 T x MXene catalyst through ammonia heat treatment, which exhibited a small overpotential and favorable stability.…”

“…Shahid et al reported a novel electrocatalyst (NSMGA) fabricated with different mass loadings of Ti 3 C 2 MXene with remarkable stability during electrochemical applications . Dang et al reported that the P-doped MoS 2 /Ni 2 P/Ti 3 C 2 T x heterostructures serving as the HER catalyst show a significant HER activity with an overpotential of 120 mV to 10 mA cm –2 in the alkaline electrolyte . Xu's team recorded that the incorporation in P element could enhance the HER properties of Mo 2 CT x MXene .…”

Robust and Efficient Carbon-Based Planar Perovskite Solar Cells with a CsPbBr3–MoS2 Hybrid Absorber

“…Nanoparticles with a minuscule size have been widely utilized for enhancing the photovoltaic performance of PSCs due to their adjustable optical/electronic character, high light absorption coefficient, multiple exciton generation, and solution processability. ,,− Various nanocrystals such as PbS, Sb 2 S 3 , Ag 2 S, and MoS 2 have been developed as efficient absorbers for solar conversion applications. − MoS 2 has attracted noteworthy interest due to its high carrier mobility (470 cm 2 ·V –1 ·s –1 for electrons and 480 cm 2 ·V –1 ·s –1 for holes), low-cost, adjustable semiconductor type, and appropriate band gap. − Kakavelakis et al have reported that the utilization of MoS 2 as a hole transport interlayer in inverted PSCs could achieve improved PCE and enhanced stability . Tang et al have utilized MoS 2 to modify the hole transport layer in inverted PSCs for improving the perovskite layer quality .…”