Construction of Ru, O Co‐Doping MoS₂ for Hydrogen Evolution Reaction Electrocatalyst and Surface‐Enhanced Raman Scattering Substrate: High‐Performance, Recyclable, and Durability Improvement

Abstract

Molybdenum disulfide (MoS 2 ) is a promising non-precious material for hydrogen evolution reaction (HER) electrocatalysts and surface-enhanced Raman scattering (SERS) substrates. However, its inert basal plane, poor active sites, and limited stability hamper their commercial prospects. Herein, Ru, O co-doped MoS 2 (MSOR x ) for accelerating the charge transfer and building more active sites using one-step hydrothermal method is designed to address these obstacles. The outstanding HER performances of the MSOR 1 with low overpotentials at 10 mA cm −2 in both acidic (197 mV) and alkaline solution (43 mV), which even rivals that of commercial Pt/C. Meanwhile, this MSOR 1 is also used as SERS substrate that has excellent sensitivity with the enhancement factor of 1.7 × 10 6 . Additionally, label-free detection of bilirubin using MSOR 1 with a detection limit of 10 −10 m has been demonstrated, also better than that of most previously reported semiconductors. Superior HER and SERS activity, universality in wide PH range and long-term stability are achieved based on the introduction of Ru and O. This study provides guidance for the synthesis of highly active catalysts and SERS substrate, and holds considerable promise for low-cost HER over the whole pH and clinical translation in accurate diagnosis of jaundice.

Material design, development, and trend for surface-enhanced Raman scattering substrates

“…Element doping is another promising method to optimize the SERS performance of semiconductor substrates by energy band engineering. 148–152 Yang et al found that Mo-doped Ta 2 O 5 substrate could exhibit a remarkable SERS sensitivity with an EF of 2.2 × 10 7 and a low LOD 9 × 10 −9 M for methyl violet (MV) molecules under the 532 nm laser excitation (Fig. 4B).…”

Review—Recent Advances in Nickel Phosphide-Based Heterostructures for Electrochemical Hydrogen Evolution Reaction

“…77 This strategy could create abundant catalytic centers and electron transfer effect from the Ni 2 P phase to the (Fe, Ni) 2 P phase, as Enormous works have proved that heteroatom doping can regulate the electronic properties of materials which could improve the HER performance. [80][81][82][83] Therefore, several groups introduced integrated strategies of doping and heterostructure construction. To illustrate, Yuan et al used sulfur for doping the core-shell architecture of Co 2 P@Ni 2 P to promote hydrogen production, as shown in Fig.…”

SACs on Non‐Carbon Substrates: Can They Outperform for Water Splitting?

“…For example, Gao et al reported that the O incorporated into Ru 1 /MoS 2 (O-Ru 1 /MoS 2 ) was successfully prepared by one-pot hydrothermal method. [155] Due to the incorporated O atoms, the electron density of Ru atom in MoS 2 could be well tuned, subsequently generating the highly catalytic sites for HER. As a result, the O-Ru 1 /MoS 2 was shown to exhibit superior HER activities in full pH media.…”