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Improved Operating Parameters for Hydrogen Peroxide‐Generating Gas Diffusion Electrodes
Author(s) -
Muddemann Thorben,
Haupt Dennis R.,
Sievers Michael,
Kunz Ulrich
Publication year - 2020
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201900137
Subject(s) - gas diffusion electrode , electrolyte , separator (oil production) , electrolysis , chemistry , electrode , hydrogen , gaseous diffusion , oxygen , hydrogen peroxide , nickel , diffusion , current density , analytical chemistry (journal) , current (fluid) , stoichiometry , inorganic chemistry , chemical engineering , materials science , thermodynamics , chromatography , organic chemistry , physics , engineering , quantum mechanics
The influence of process parameters on the H 2 O 2 yield of gas diffusion electrodes (GDE) are investigated. The investigated GDEs consist of Vulcan XC72 carbon black and PTFE on gold‐plated nickel wire cloth. An electrolysis cell is used to evaluate the influence of various process parameters, such as temperature, pH value, oxygen pressure and stoichiometric factor, electrolyte flow regime, current density and separator material at steady‐state conditions. It is found that the investigated GDE enables current efficiencies greater than 90 % at up to 2 kA m −2 , whereby lower electrolyte temperatures and higher pH values contribute to higher H 2 O 2 yields above 90 % current efficiency.