Cathodic hydrogen production by simultaneous oxidation of methyl red and 2,4-dichlorophenoxyacetate aqueous solutions using Pb/PbO₂, Ti/Sb-doped SnO₂and Si/BDD anodes. Part 1: electrochemical oxidation

Abstract

In this work, the electrochemical oxidation of a dye and an herbicide was investigated on non-active anodes in aqueous acidic medium in order to understand its effect to produce simultaneously hydrogen as eco-friendly energy alternative.

A sustainable solar-driven electrochemical process for reforming lignocellulosic biomass effluent into high value-added products: green hydrogen, carboxylic and vanillic acids

“…7–9 Nevertheless, the effects of some of the parameters, such as cell design, electrode spacing, the use of separation membranes between compartments and even the current effects of the parasite reactions, should be additionally considered on the performance of the system. 39 As last observation, the efficiency of H 2 production relative to energy consumption decreases equivalently, and energy efficiency decreases with j . 73,74…”

“…Electrode selection, as anode and cathode, is the key to the success of an AEM electrolyzer. 37 On the one hand, the Ni and Fe alloys cathodic electrodes have demonstrated higher activities in alkaline media for H 2 production, 38,39 while on the other hand, among the anodic materials commonly used, boron-doped diamond (BDD) anode has outstanding ability to fragment difficult-to-degrade molecules due to the electrogeneration of oxidants such as S 2 O 8 2− , ˙OH, chlorine species, and peroxodiphosphate. 4,40–43…”

“…3,4,35,36 Electrode selection, as anode and cathode, is the key to the success of an AEM electrolyzer. 37 On the one hand, the Ni and Fe alloys cathodic electrodes have demonstrated higher activities in alkaline media for H 2 production, 38,39 while on the other hand, among the anodic materials commonly used, borondoped diamond (BDD) anode has outstanding ability to fragment difficult-to-degrade molecules due to the electrogeneration of oxidants such as S 2 O 8 2− , cOH, chlorine species, and peroxodiphosphate. 4,[40][41][42][43] Within this framework, the aim of this work was to investigate the performance of an innovative hybrid electrochemical system using BDD and Ni-Fe as anode and cathode electrodes for the treatment of a 1 L of an effluent containing 0.5 g L −1 lignocellulosic biomass in NaOH as supporting electrolyte.…”

Relevance of gaseous flows in electrochemically assisted soil thermal remediation

“…Most recent works have been carried out toward of the integration between electrokinetic remediation and production of hydrogen, which despite it is not a pollutant it may have important implications in the sustainability of the processes because of its role as energy carrier. Hydrogen production is an eco-friendly approach that has been investigated for water splitting or simultaneous degradation of organic pollutants in divided or undivided electrochemical cells [40,41]. Nevertheless, the reactive and thermal processes that naturally occur during EK soil remediation can consequently contribute to the production of gases [4].…”

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

“…Nowadays, hybrid electrolysis strategies are particularly attractive in the context of a circular economy as these can be coupled with the use of more complex water matrices to transform organic depollution into an energy resource to produce H 2 as a chemical energy carrier. A recent and original example of this approach is the EO of Methyl Red with PbO 2 , BDD and Sb-doped SnO 2 anodes [ 33 ] in a two-compartment electrochemical reactor with simultaneous H 2 production in the cathode compartment [ 34 ]. Currently, some related studies by using a PEM-type cell have been recently published, oxidizing different sacrificial organic molecules to produce H 2 [ 35 , 36 , 37 ].…”