Direct Synthesis of Hydrogen Peroxide from Hydrogen and Oxygen by Using a Water‐Soluble Iridium Complex and Flavin Mononucleotide

Abstract

H2 und O2 werden H2O2: Die direkte Synthese von Wasserstoffperoxid aus Wasserstoff und Sauerstoff in Wasser gelingt mit dem IrIII‐Komplex [IrIII(Cp*)(4‐(1H‐Pyrazol‐1‐yl‐κN2)benzoesäure‐κC3)(H2O)]2SO4 und Flavinmononucleotid. Die Methode liefert Wasserstoffperoxid mit hoher Umsatzzahl (847) und Ausbeute (19.2 %) bei Umgebungsdruck und ‐temperatur.

Hybrid Organometallic and Enzymatic Tandem Catalysis for Oxyfunctionalisation Reactions

“…The performance of complex 1 compares well with that of [Cp*Rh(bpy)(H 2 O)] 2 + catalysing FMN and FAD reduction with TOF of 74.3 h À 1 (at 310 K and [HCOONa] = 150 mM) and 28.4 h À 1 (at 303 K; [Cp*Rh(bpy)(H 2 O)] 2 + = 0.025 mM; [FAD] = 1 mM and [HCOONa] = 500 mM), respectively. [23] It is worth mentioning that, to best of our knowledge, only one other Ir complex capable of reducing FMN has been reported in literature, [24] utilising H 2 instead of HCOO À to in situ generate the IrÀ H reducing moiety.…”

Electrogeneration of hydrogen peroxide for electro-Fenton via oxygen reduction using polyacrylonitrile-based carbon fiber brush cathode

“…H 2 O 2 is one of the most essential and versatile chemicals for pulp bleaching, waste treatment and numerous compounds manufacture [1][2][3], and it is promising for green chemistry and environmental control, especially for effluents treatment because it decomposes solely into water and oxygen, leaving no hazardous residues [4][5][6]. It can be employed either alone or in combination with UV or metal salts to significantly enhance the oxidizing efficiency.…”

“…The current large-scale manufacture of H 2 O 2 , multi-step anthraquinone oxidation (AO) method, has disadvantages of high energy consumption and waste discharge [1,3,4,11], therefore extensive efforts have been devoted to directly synthesizing H 2 O 2 in situ to reduce the cost and potential risks in purchasing, transporting, storaging and handling of concentrated H 2 O 2 [5,6,12]. Two strategies have aroused wide attention.…”

“…One is a direct synthesis from hydrogen (H 2 ) and oxygen (O 2 ) via precious-metal catalysts (Pd, Au, or Au-Pd) [11,13,14] but with too much undesired side reactions (reactions (1) and (2)) [3,15]and serious problems such as unfavorable high-pressure and danger of explosion [3,11]. 4 The other strategy resorts to an electrochemical synthesis via a 2-electron ORR [16] where only O 2 or air is needed to be reduced on suitable electrode with simple steps and no hazardous products is generated.…”