Improving the photocatalytic H₂ evolution activity of Keggin polyoxometalates anchoring copper-azole complexes

Abstract

Eliminating the use of precious metals as cocatalysts and using visible light are two important aspects in the field of photocatalytic H2 evolution with polyoxometalates (POMs) as photosensitizers. Here we...

A Facile Strategy to Create Electrocatalysts of Highly Dispersive Ni–Mo Sulfide Nanosheets on Graphene by Derivation of Polyoxometalate Coordination Polymer for Advanced H2 Evolution

“…As shown in Figure , these measurements show a hysteresis loop, indicating that both materials are mesoporous structures. , The calculated Brunauer–Emmett–Teller (BET) surface area of Ni–Mo–S–rGO-200-24-2 and Ni–Mo–S-200-24-2 are 23.43 and 13.13 m 2 ·g –1 , respectively. These mesoporous structures provide sufficient channels for the electrolyte diffusion and emission of H 2 bubbles. , …”

“…These mesoporous structures provide sufficient channels for the electrolyte diffusion and emission of H 2 bubbles. 20,22 Electrocatalytic HER Measurements. The electrochemical measurements were performed with a three-electrode cell, a graphite rod as counter electrode, and a saturated calomel electrode (SCE) as reference electrode in 1.0 M KOH.…”

“…Till now, several nonprecious metal catalysts including carbides, − nitrides, − oxides, − phosphides, ,− sulfides, − selenides, − alloy systems, − and their derivatives have been created and described as prospective electrocatalysts for the HER. Among them, molybdenum disulfide (MoS 2 ), given its graphene-like 2D layered structure, Pt-like behavior, low cost, and mild synthetic conditions, has aroused a lot of interest. − Nevertheless, its limited number of exposed active sites of unsaturated Mo- and S-edges and its weak inherent charge carrier mobility hinder its potential development and application as an efficient catalyst for the HER.…”

A series of POM compounds constructed using a flexible ligand containing three coordination groups: electrocatalytic and photocatalytic reduction and amperometric detection of Cr(vi)

“…Polyoxometalates (POMs), as metal-oxo clusters with rich structures and various properties, have been widely used in many fields such as electricity, optics, catalysis, and materials. 1–9 The combination of POMs as inorganic units and transition metal complexes (TMCs) can form a variety of structures. 10 Moreover, the selection of appropriate organic ligands is very important for the construction of POM–TMC structures.…”

Cobalt complexes tuned by Anderson-type polyoxometalates and bis-amide derivative ligands featuring a ‘V’-like connector for efficient ampere sensing and the visible-light catalytic reduction of Cr(vi)

“…In particular, N-donor ligands containing pyridyl, tetrazole, and imidazole groups have become popular candidates in recent years, due to the fact that the multiple N-donors makes it possible for them to play active roles in the construction of versatile structures and stable POM-based frameworks. [26][27][28] Further, the design of amide derivative ligands containing multiple N/O sites enriched the structures and expanded the application of POM-based complexes. For instance, two Evans-type POMbased complexes constructed from two different bis-pyridinebis-amide ligands, synthesized by Li et al showed excellent catalytic oxidation performance.…”