# Direct Growth of Platinum Monosulfide Nanoparticles on MXene via Single‐Source Precursor for Enhanced Hydrogen Evolution Reaction

## TL;DR

Researchers developed a method to grow platinum monosulfide nanoparticles directly on MXene, improving hydrogen production efficiency.

## Contribution

A single-source precursor enables direct growth of PtS on MXene, enhancing HER performance without binders or surfactants.

## Key findings

- PtS nanoparticles on MXene show a low overpotential of −104 mV at −10 mA cm−2.
- The Tafel slope is 48.3 mV dec−1, indicating efficient charge transfer.
- The PtS/MXene heterostructure outperforms standalone PtS or MXene in HER activity and durability.

## Abstract

2D Ti3C2Tx MXene offers high electrical conductivity and a large surface area, making it attractive for electrocatalysis. However, its intrinsic hydrogen evolution reaction (HER) activity remains poor due to the lack of active catalytic sites. To activate the otherwise inert surface, platinum monosulfide (PtS) nanoparticles are synthesized directly on Ti3C2Tx nanosheets via thermal decomposition of a single‐source precursor, Pt(dmampS)2, in a solution‐based process. This direct growth strategy enables uniform dispersion of PtS nanoparticles and intimate interfacial contact with the MXene surface, without the need for binders or surfactants. The resulting PtS/Ti3C2Tx heterostructure exhibits significantly enhanced HER performance, achieving a low overpotential of −104 mV at a current density of −10 mA cm−2 and a Tafel slope of 48.3 mV dec−1.

Direct growth of platinum monosulfide (PtS) nanoparticles on Ti3C2Tx MXene via a single‐source precursor creates robust interfacial coupling and efficient charge transfer. The PtS/MXene heterostructure demonstrates superior hydrogen evolution activity and remarkable durability compared to standalone PtS or pristine Ti3C2Tx, highlighting the synergistic effect and scalable potential of Pt‐based chalcogenide/MXene electrocatalysts.© 2025 WILEY‐VCH GmbH