In:
Journal of The Electrochemical Society, The Electrochemical Society, Vol. 170, No. 7 ( 2023-07-01), p. 073503-
Abstract:
The cathodic destruction reaction severely restricts the ceiling concentration of H 2 O 2 electrosynthesis. The effects of cathodic destruction reaction and H 2 O 2 accumulation on the H 2 O 2 electrosynthesis performances are investigated particularly. The H 2 O 2 electro-reduction reaction mechanism on the Au 0.5 Pd 0.5 /C is determined. It indicates that the oxygen reduction reaction will be replaced by the H 2 O 2 electro-reduction reaction after H 2 O 2 accumulates to the ceiling concentration. Two simple methods are tried to enhance the H 2 O 2 electrosynthesis performances. When pure oxygen was supplied, the maximum discharge current density was 47.95 mA cm −2 at 0 V. The maximum power density was 2.57 mW cm −2 at 21.54 mA cm −2 . It can self-driven produce 6.75 mmol l −1 H 2 O 2 in H 2 SO 4 medium within 360 min, with a current efficiency of 51.34% and productivity of 0.28 mmol cm −2 h −1 . With the external power source, the energy consumption for 1.02 g l −1 H 2 O 2 solution was only 0.87 kWh kg −1 , with a remarkable productivity of 0.94 mmol cm −2 h −1 .
Type of Medium:
Online Resource
ISSN:
0013-4651
,
1945-7111
DOI:
10.1149/1945-7111/ace4f5
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2023
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