Enhanced electrocatalytic activity of PtRu/nitrogen and sulphur co-doped crumbled graphene in acid and alkaline media.

The low mass activity and high price of pure platinum (Pt)-based catalysts predominantly limit their large-scale utilization in electrocatalysis. Therefore, the reduction of Pt amount while preserving the electrocatalytic efficiency represents a viable alternative. In this work, we prepared new PtRu nanoparticles supported on sulphur and nitrogen co-doped crumbled graphene with trace amounts of iron (PtRu/PF) electrocatalysts.

Plasmon-Driven Electrochemical Methanol Oxidation on Gold Nanohole Electrodes.

Direct methanol oxidation is expected to play a central role in low-polluting future power sources. However, the sluggish and complex electro-oxidation of methanol is one of the limiting factors for any practical application. To solve this issue, the use of plasmonic is considered as a promising way to accelerate the methanol oxidation reaction.

CoO Promoted the Catalytic Activity of Nitrogen-Doped MoS Supported on Carbon Fibers for Overall Water Splitting.

Non-noble metal electrocatalysts have recently witnessed increasing attention for the hydrogen evolution reaction (HER) in acidic electrolytes. However, in alkaline electrolytes, the slow kinetics of water splitting leads to poor HER activities. In this study, we describe the preparation of a hybrid material consisting of cobalt oxide (CoO) decorated on nitrogen-doped MoS supported on carbon fibers (CoO/N-MoS/CF) through a two-step process combining hydrothermal technique and electrochemical deposition.

Thinness- and Shape-Controlled Growth for Ultrathin Single-Crystalline Perovskite Wafers for Mass Production of Superior Photoelectronic Devices.

Thinness-controlled perovskite wafers are directly prepared using a geometry-regulated dynamic-flow reaction system. It is found that the wafers are a superior material for photodetectors with a photocurrent response ≈350 times higher than that made of microcrystalline thin films. Moreover, the wafers are compatible with mass production of integrated circuits.

2D-MoO3 nanosheets for superior gas sensors.

By taking advantages of both grinding and sonication, an effective exfoliation process is developed to prepare two-dimensional (2D) molybdenum oxide (MoO3) nanosheets. The approach avoids high-boiling-point solvents that would leave a residue and cause aggregation. Gas sensors fabricated using the 2D-MoO3 nanosheets provide a significantly enhanced chemical sensor performance.

A Se-doped MoS2 nanosheet for improved hydrogen evolution reaction.

Thanks to the increase in the number of active sites and enhanced conductivity, the Se-doped MoS2 shows excellent catalytic activity with a lower overpotential of -140 mV and a smaller Tafel slope of 55 mV dec(-1), exhibiting enhanced catalytic performance compared with that of pristine MoS2. This work offers an attractive strategy to improve the HER activity of MoS2-based catalysts.