Photocatalytic hydrogen evolution by Cu(ii) complexes

Abstract

[Cu(TMPA)Cl]Cl (1) and [Cu(Cl-TMPA)Cl2] (2) exhibited efficient photocatalytic H2 evolution with a TON of 6108 and 10014 (6 h), respectively, in CH3CN/H2O solution (9 : 1, v/v) containing an Ir complex as the photosensitizer and triethylamine as the sacrificial reductant, representing the first example of photocatalytic Cu complex-based water reduction catalysts.

The Fe2(NO)2 Diamond Core: A Unique Structural Motif In Non‐Heme Iron–NO Chemistry

“…The ligand TPA was synthesized according to reported procedures, and characterized by 1 H-NMR spectroscopy. [15] Metallation of TPA was carried out using Fe ( with excess NO gas, which led to an immediate color change to black. Complex 1 was isolated as a pure black solid upon crystallization.…”

Recent advances in the mechanisms of the hydrogen evolution reaction by non-innocent sulfur-coordinating metal complexes

“…6,7 Over the years, several groups have developed and studied synthetic metal complexes with excellent performances for electrocatalytic hydrogen production and some of them also provide highly efficient photocatalytic systems. [8][9][10] The development of inexpensive proton reduction catalysts based on Earth-abundant elements 11,12 such as Fe, 13 Ni, [14][15][16] Cu, [17][18][19] and Co 20,21 to replace the less abundant and high cost platinum-based materials for catalytic proton reduction is a great scientific challenge and a significant step towards sustainable solar energy conversion. Some of the most efficient H 2 evolution homogeneous catalysts designed are the distorted octahedral Ni(II) complex [Ni(bztpen)] 2+ (bztpen = N-benzyl-N,N′,N′-tris( pyridine-2ylmethyl)ethylenediamine), which shows a very high TON of 308 000 over 60 h electrolysis with an applied potential of −1.25 V vs. SHE 22 and the distorted octahedral Co(II) complex of 2-bis(2-pyridyl)(methoxy)methyl-6-pyridylpyridine, which produces >55 000 moles of H 2 per mole of catalyst over 60 h under −1.30 V vs. SHE applied potential.…”

Photocatalytic Generation of Hydrogen Using Dinuclear π‐Extended Porphyrin–Platinum Compounds

“…In the field of artificial photosynthesis, the target is to mimic these natural processes and to apply the general construction concept to provide a sustainable energy supply. Hydrogen production via water splitting either electrocatalytically or photocatalytically is of great interest in today's research efforts as it offers one promising solution for both the energy crisis and CO 2 emission induced climate change . The development of highly efficient, long term stable, and low cost water reduction photocatalysts has been of great interest in the scientific community .…”