Tridentate bis(2-pyridylmethyl)amine iron catalyst for electrocatalytic proton reduction

A mono-oxo-bridged binuclear iron(iii) complex with a Fe–O–Fe angle of 180.0° and its catalytic activity for hydrogen evolution

“…It is not easy to compare the catalytic activity among different electrocatalytic systems in terms of TOF values, due to possible differences in the experimental conditions conducted and calculated methods. For example, an iron complex, [Fe(L)Cl 3 ] (L: bis(pyridin-2-ylmethyl)amine) can electrocatalyze hydrogen evolution with a TOF of 16 s −1 at −0.95 V vs. SHE, 42 a nickel complex, Ni 3 (L N2S2 ) 2 (L N2S2 : N , N ′-dimethyl- N-N ′-bis(2-mercaptoethyl)-ethylenediaminato) can provide H 2 with a TOF of 715 s −1 at −1.58 V vs. SCE, 43 an iron complex, Fe 2 ( μ -odt)(CO) 5 {Ph 2 P(CH 2 NMe 2 )} (odt: oxadithiolate) can afford H 2 with a TOF of 5.4 s −1 44 and a nickel complex, Ni(L′) 2 (HL′: 2-(diphenylphosphanyl)benzenethiol) can electro-catalyze hydrogen production with a TOF of 51 s −1 . 45…”

Recent findings and future directions in photosynthetic hydrogen evolution using polypyridine cobalt complexes

“…Moreover, they also represent discrete, molecular models of the active sites of bulk materials, allowing for detailed mechanistic insight into the catalytic process during the HER when using these materials. Examples of molecular catalysts are coordination complexes based on iron, 6–9 nickel, 10–13 and copper. 14–16 Within this framework, cobalt complexes have so far played a prominent role as molecular catalysts for the HER under both electrochemical and light-driven conditions.…”

Electrocatalytic Hydrogen Evolution by Water‐Soluble Cobalt (II), Copper (II) and Iron (III)meso‐Tetrakis(carboxyl)porphyrin

“…In the past few decades, the most effective catalysts are still based on precious metals, such as Pt, [6] Ru, Re [7] and Ir, which are not a sustainable resource. [8] Recently, a majority of first-row transition metal complexes have been studied either as photocatalysts or electrocatalysts for hydrogen production, such as Fe, [9,10] Cu [11][12][13] and Co [14][15][16] complexes.Currently, most of these complexes use organic acids as a proton source to drive hydrogen evolution. Clearly, those catalysts which can directly drive water splitting to produce hydrogen are more attractive in terms of renewable energy sources and environmental friendly.…”