CO2-derived edge-boron-doped hierarchical porous carbon catalysts for highly effective electrochemical H2O2 production

Efficient Electrosynthesis of Hydrogen Peroxide Using Oxygen-Doped Porous Carbon Catalysts at Industrial Current Densities

“…The LSV test of the optimized flow cell (Figure c) could reach a current density of 342.5 mA cm –2 at an E cell of 3 V, using a gas diffusion electrode loaded with C-0.1M80. Stability tests were performed at 100 mA cm –2 with an impressive uninterrupted run time of 200 h and an average Faraday efficiency of 95.8%, demonstrating that the catalyst has a long-term stable and highly selective performance for hydrogen peroxide production, exceeding the results reported in most articles (Figure e) ,,− ,− . In addition, the voltage decay rate was only 7.0 mV h –1 at 100 mA cm –2 , indicating that the reduction of the thermal effect of ohmic polarization improved the stability of the electrolytic cell.…”

“…(a) Schematic structure of the three-phase flow cell with solid electrolyte, (b) the LSV curves of the three-phase flow cell tested with C-0.1M80 and C-1.0M70, (c,d) V – t curves and yield plots for C-0.1M80 tested at 50 to 250 mA cm –2 , (e,f) plots of three-phase flow cell stability data ,,− ,− and Faraday efficiency ,,− plots reported in the literature, (g) a plot of the 100 h stability test of C-0.1M80 at 50 mA cm –2 . E cell, iR‑free are the cell voltages without iR correction.…”

Maximizing Thiophene–Sulfur Functional Groups in Carbon Catalysts for Highly Selective H2O2 Electrosynthesis

“…After this durability testing, the produced H 2 O 2 was quantified as 47.1 ± 0.1 mg according to the standard ceric sulfate titration (Figures S23 and S24). Significantly, the H 2 O 2 production rate is estimated as 117.7 ± 0.2 mg·mg –1 Cat ·h –1 (Table S2) with a faradaic efficiency of about 92.8 ± 0.2%, which is among the greatest reported values …”

Review and perspectives on carbon-based electrocatalysts for the production of H2O2via two-electron oxygen reduction

“…The B–C conformations of B 4 C, BC 3 , BCO 2 , and BC 2 O in the 2e − ORR have been reported, but the effect of B-doping on the carbon-edge defect sites has been less well studied. A CO 2 -derived edge B-doped porous carbon catalyst (E-BPC) with high activity (54.7 A g −1 ) and high selectivity (>80%) for the efficient production of H 2 O 2 via 2e − ORR was reported by Byeon et al 159 The E-BPC synthesized by the CO 2 process has the advantages of a large specific surface area and controlled B-doping. The authors demonstrated by DFT that in the B and O double-doped system, BC 3 and B 4 C have a negative impact on 2e − ORR activity when located at the carbon edge, and the E-BPC, consisting mainly of BC 3 , BC 2 O, and BCO 2 , exhibits good 2e − ORR performance.…”