Electrocatalytic hydrogen evolution with cobalt–poly(4-vinylpyridine) metallopolymers

Abstract

A facile synthetic pathway using poly(4-vinylpyridine) as a polypyridyl platform is reported for the formation of a metallopolymer. Electrochemical studies indicate that the metallopolymer acts as an efficient H 2 evolution catalyst similar to cobalt polypyridyl complexes. It is also observed that the metallopolymer is transformed to cobalt particles when a cathodic potential is applied in the presence of an acid. Electrochemical measurements indicate that an FTO electrode coated with these cobalt particles also acts as an efficient hydrogen evolution catalyst. Approximately 80 µmoles of H 2 gas can be collected during 2 h of electrolysis at − 1.5 V (vs. Fc +/0) in the presence of 60 mM of acetic acid. A comprehensive study of the electrochemical and electrocatalytic behavior of cobalt-poly(4-vinylpyridine) is discussed in detail.

Visible light-driven water oxidation with a ruthenium sensitizer and a cobalt-based catalyst connected with a polymeric platform

“…Moreover, a lack of peaks below 780 eV rules out the decomposition of Co-Fe PBA to a possible catalytically active oxide species. 26 XPS of the O 1s region was conducted to conrm that there is no decomposition of the metal-coordinated clusters which might lead to a mixed metal oxide. Analysis of the O 1s region clearly shows that there is no cobalt oxide species, which typically have binding energies lower than 530 eV, and peaks observed around 531 eV are only due to surface-adsorbed oxygen species (Fig.…”

“…In another study, a Co-P4VP assembly has successfully been prepared and found to be an efficient metallopolymer for water reduction electrocatalysis. 26 Given the successful utilization of P4VP for catalytic applications, herein, we propose a synthetically facile dyad, wherein the ruthenium-based molecular photosensitizer is connected to a Prussian blue type water oxidation catalyst through a P4VP platform. Photocatalytic water oxidation performance has been investigated in comparison with a cobalt-based PBA.…”

4-vinylpyridine derivatives: Protonation, methylation and silver(I) coordination chemistry

“…Thus, the incorporation of pyridyl units in polymer materials will certainly bring versatile physical and chemical properties along with applications in optical, electronic, magnetic, catalytic, conductive and chemosensing materials. 2,3 Remarkable recent progress in PVP chemistry includes applications in solar cells, 4,5 organic-inorganic hybrid functional materials, [6][7][8][9][10] nanomaterials, 11,12 catalysis/electrocatalysis, [13][14][15] heavy metal absorption/removal [16][17][18] and environmental sensors. [19][20][21] In addition to its main applications in polymer materials, 4-VP is also an important synthon in organic synthetic chemistry as well as in small molecular materials.…”

Metallopolymers as Nanostructured Solid‐State Platforms for Electrochemiluminescence Applications

“…ECL‐active metallopolymers are suitable for the fabrication of biosensors due to the ease of deposition and relatively easy synthesis . These polymers find use in numerous application such as electrocatalysis, electrochromic devices, sensors, actuators, energy storage, and energy‐harvesting as extensively reported by different reviews on this topic …”

“…[28] ECL-active metallopolymers are suitable for the fabrication of biosensors due to the ease of deposition and relatively easy synthesis. [29][30][31][32][33] These polymers find use in numerous application such as electrocatalysis, [34,35] electrochromic devices, [36] sensors, [37] actuators, [38,39] energy storage, [40] and energy-harvesting [41] as extensively reported by different reviews on this topic. [28,[42][43][44][45][46] This Concept article aims at illustrating the use of metallopolymers in ECL by presenting and discussing some selected key examples in this growing area of research.…”