From plastic-waste to H2: Electrolysis of a Poly(methyl methacrylate) model molecule on polymer electrolyte membrane reactors

New insights into lignin electrolysis on nickel-based electrocatalysts: Electrochemical performances before and after oxygen evolution

“…On the other hand, as in our previous study [29], the composition of the gas produced at the cathode was online recorded during the cyclic voltammetry experiments in the AEM configuration with a quadrupole mass spectrometer (Portable Quadrupole MS, Aspec). The QMS operated under vacuum (~ 1.3 x 10 -6 mbar), evacuated by a 70 L s -1 turbo molecular drag pump combined with a backing pump.…”

“…In order to verify the purity of the hydrogen production, during the cyclic voltammetry tests with 2-PE and lignin (Figs. 4b and c, respectively), the composition of the gas produced at the cathode was qualitatively measured by mass spectrometry, as we described in our previous study for the electrolysis of a plastic model molecule [29]. Figs.…”

“…In addition, this technology could valorize feedstocks of organic wastes that are usually incinerated to produce heat, with the subsequent production of hazardous pollutants. For instance, few recent works focused on the valorization of plasticwastes via electrolysis for hydrogen production [28,29]. On the other hand, the number of publications dealing with the electrolysis of lignin is exponentially increasing in the last years [30][31][32][33][34][35][36][37][38][39][40][41][42].…”

Current Developments in the Chemical Upcycling of Waste Plastics Using Alternative Energy Sources

“…[15a] To avoid the issue of poor plastics solubility in conductive media, most previous studies focused on the electrocatalytic conversion of the primary depolymerization products from condensation plastics (e. g., 6-acetamidohexanoic acid, the primary acetylation product of Nylon-6) [41] or model molecules such as methyl pivalate, which possesses similar functional groups to poly(methyl methacrylate). [42] However, the direct production of value-added chemicals from waste plastics is still not overcome since there are no obvious pathways for converting the plastics to these depolymerization products or model molecules. To partly address the low solubility of plastics, one approach was to dissolve them in acids at high temperatures, which could be applied mainly for polyurethane, Nylon, and Vinylon.…”

Coupling of PET waste electroreforming with green hydrogen generation using bifunctional catalyst

“…Water splitting is the only method to produce green H 2 . [4][5][6] A thermodynamic voltage of at least 1.23 V is required for H 2 O molecular breakage, where substantial amount of energy is used to oxidize water that produces the by-product oxygen. 7,8 Therefore, replacing water oxidation with a new oxidation reaction to reduce energy consumption and to produce higher value product (than oxygen) is attracting ever-increasing interest.…”