Catalytic Properties of Vanadium Diselenide: A Comprehensive Study on Its Electrocatalytic Performance in Alkaline, Neutral, and Acidic Media

Abstract

Here, we report the synthesis of vanadium diselenide (VSe 2 ) three-dimensional nanoparticles (NPs) and two-dimensional (2D) nanosheets (NSs) utilizing nanosecond pulsed laser ablation technique followed by liquid-phase exfoliation. Furthermore, a systematic study has been conducted on the effect of NP and NS morphologies of VSe 2 in their catalytic activities toward oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) under alkaline, neutral, and acidic conditions. Research on VSe 2 clearly demonstrates that these morphologies do not have a significant difference for ORR and OER; however, a drastic effect of morphology was observed for HER. The ORR activity of both NSs and NPs involves ∼2.85 numbers of electrons with the Tafel slope of 120 mV/dec in alkaline and neutral pH. In alkaline solution, NPs are proved to be an efficient catalyst for OER with an onset potential 1.5 V; however, for HER, NSs have a better onset potential of −0.25 V. Moreover, the obtained NPs have also better catalytic activity with a 400 mV anodic shift in the onset potential compared to NSs. These results provide a reference point for the future application of VSe 2 in energy storage and conversion devices and mass production of other 2D materials.

Atomic Layer Deposition of NiOOH/Ni(OH)2 on PIM‐1‐Based N‐Doped Carbon Nanofibers for Electrochemical Water Splitting in Alkaline Medium

“…Despite the better catalytic activity of these catalysts, their high cost, scarcity, and poor stability limit their commercial and widespread use. Therefore, enormous efforts have been devoted to replacing these catalysts with non‐noble‐metal‐based, abundant, and highly efficient electrocatalysts for water splitting such as VSe 2 , Co oxide, and Fe oxide . The challenge of using such non‐noble‐metal catalysts for water splitting in an alkaline solution is their instability.…”

“…[1,2] Despite the better catalytic activity of thesec atalysts, their high cost, scarcity, and poor stability limit their commercial and widespread use. Therefore, enormous efforts have been devotedt or eplacing these catalysts with non-noble-metalbased, abundant, and highly efficient electrocatalysts for water splitting such as VSe 2 , [3] Co oxide, [4,5] and Fe oxide. [6] The challenge of using such non-noble-metal catalysts for water splitting in an alkaline solutioni st heir instability.N ih as as imilar binding energy with hydrogena sP t [7,8] and has been widely considered and applieda sawater-splitting catalysti nv arious forms such as sea-urchin-shaped Ni 3 (VO 4 ) 2 , [9] bimetallic NiMoN nanowires, [10] and Ni 3 Se 2 .…”

Emerging photoluminescence from defective vanadium diselenide nanosheets

“…Besides the extra-high electrical conductivity of a VSe 2 monolayer (that has been experimentally proved recently [47]), some other unexpected properties of this material have also been investigated in recent years. Its unique charge density wave (CDW) [50], ferromagnetism behavior [51][52][53], and electrochemical activity [toward a hydrogen evolution reaction (HER)] [54][55][56][57][58] are examples of these explorations. Owing to its metallic nature with no optical band gap, it has been expected that it should not be considered for optical applications.…”

Recent Developments on Emerging Properties, Growth Approaches, and Advanced Applications of Metallic 2D Layered Vanadium Dichalcogenides

“…Image of catalysis, fuel cell: Reproduced with permission. [ 139 ] Copyright 2017, American Chemical Society. Image of cancer theranostics: Reproduced with permission.…”

“…[ 136,137 ] Similarly, HER activities of 2D VSe 2 nanosheets are reported, which is summarized in Table 6. [ 63,69,138–140 ] A comparative experimental and DFT studies of VX 2 revealed that VTe 2 emerge as the best performing material for HER with overpotential at 0.5 V versus RHE and Tafel slope of 55 mV dec −1 with an order as VS 2 < VSe 2 < VTe 2 . [ 52 ]…”