Synthesis, characterization and electrocatalytic performance of a dinuclear triazenidosilver(I) complex for hydrogen production

Abstract

Our group has developed a series of molecular electrocatalysts for hydrogen generation based on triazenido–metal complexes (cobalt, copper, etc.). In this paper, we first present the electrocatalytic performance of a new dinuclear silver complex, [Ag2(L)2], formed by the reaction of the triazenido ligand 1‐[(2‐carboxymethyl)benzene]‐3‐[(2‐methoxy)benzene]triazene (HL) with AgNO3. At room temperature, the silver complex shows photoluminescence at 653 nm. The electrocatalytic systems based on this silver complex can afford 106.57 and 1536.36 moles of hydrogen per mole of catalyst per hour from acetic acid at an overpotential (OP) of 991.6 mV and from a neutral aqueous buffer (pH = 7.0) at an OP of 837.6 mV, respectively. Electrochemical investigations show that both silver ion and triazenido ligand play a role in determining the catalytic activities of the electrocatalytic system.

Accelerated ZnMoO4 photocatalytic degradation of pirimicarb under UV light mediated by peroxymonosulfate

“…For instance, adsorption methods are based on the phase transfer of pollutants without transformation into non‐toxic derivatives, while biological treatments are lengthy with slow kinetics and they require disposal of activated sludges . Meanwhile, research in multidisciplinary fields such as electrochemistry, photophysics and catalysis has emerged as a strong platform to advance practical solutions to various substantial environmental problems . Semiconductors have been actively investigated in water treatment applications leading to efficient catalytic photodegradations of a variety of pollutants into completely non‐toxic or less harmful products…”

Synthesis of 1,3-Diaryltriazenes and Azo Dyes from Aryl Amines Using N-Nitrososulfonamides

“…[13][14][15][16][17][18][19][20] In addition to biological applications, disubstituted triazenes can form anionic ligands useful for organometallic transformations, with recent reports showing that triazenido-metal complexes can serve as efficient catalysts for hydrogen evolution. 21 Azo compounds represent approximately 70% of all synthetic dyes. 22 They are widely used as colorants in the textile industries and as dyes for drug, food, cosmetic, and photography applications.…”

Computational insights into the coupling mechanism of benzoic acid, phenoxy acetylene and dihydroisoquinoline catalyzed by silver ion as polarizer and stabilizer

“…[1,2] Silver salts or Ag 2 O are often added as cocatalyst, additive, oxidant and supporting agent to accelerate reaction processes. [3][4][5][6][7] However, silver ion is generally not regarded as a part of catalyst, but is required for the reaction, which is called the silver effect. With regard to the homogeneous systems aided with high-valence metal ions, for example, Rh (III)catalyzed synthesis of naphthalenes, [8,9] silver salts are normally used as external oxidant to recover the activity of catalysts.…”