Use of Gas Diffusion Electrode for the In Situ Generation of Hydrogen Peroxide in an Electrochemical Flow-By Reactor

被引：118

作者：

Reis, Rafael M. ^{[1
]}

Beati, Andre A. G. F. ^{[1
]}

Rocha, Robson S. ^{[1
]}

Assumpcao, Monica H. M. T. ^{[2
]}

Santos, Mauro C. ^{[2
]}

Bertazzoli, Rodnei ^{[3
]}

Lanza, Marcos R. V. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[2] Univ Fed ABC, Lab Eletroquim & Mat Nanoestruturados, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP, Brazil

[3] Univ Estadual Campinas, Fac Engn Mecan, BR-13083970 Campinas, SP, Brazil

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2012年 / 51卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

FED GRAPHITE/PTFE ELECTRODES; OXYGEN REDUCTION; ACID-MEDIUM; DEGRADATION; OXIDATION; CARBON; ELECTROCATALYSIS; MINERALIZATION; ANILINE; UV/H2O2;

D O I：

10.1021/ie201317u

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Hydrogen peroxide is a powerful oxidant that finds application in several areas, but most particularly in the treatment of industrial wastewaters. The aim of the present study was to investigate the effects of applied potential and electrolyte flow conditions on the in situ generation of hydrogen peroxide in an electrochemical flow-by reactor with a gas diffusion electrode (GDE). The electrolyses were performed in an aqueous acidic medium using a GDE constructed with conductive black graphite and polytetrafluoroethylene (80:20 w/w). Under laminar flow conditions (flow rate = 50 L/h), hydrogen peroxide was formed in a maximum yield of 414 mg/L after 2 h at -2.25 V vs Pt //Ag/AgCl (global rate constant = 3.1 mg/(L min); energy consumption = 22.1 kWh/kg). Under turbulent flow (300 L/h), the maximum yield obtained was 294 mg/L after 2 h at -1.75 V vs Pt//Ag/AgCl (global rate constant = 2.5 mg/ (L min); energy consumption = 30.1 kWh/kg).

引用

页码：649 / 654

页数：6

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