MD3151F1

MD3151F1 - Electrode and process for obtaining thereof for electrolysis of the alkaline aqueous solutions

Info

Publication number: MD3151F1
Application number: MDA20050357A
Authority: MD
Inventors: Olga Covaliova; Mihail Ivanov; Victor Covaliov
Original assignee: Universitatea De Stat Din Moldova
Priority date: 2005-12-05
Filing date: 2005-12-05
Publication date: 2006-09-29
Also published as: MD3151G2

Abstract

Inventia se refera la obtinerea electrozilor si poate fi utilizata in electrochimie, in electrolizaindustriala a solutiilor alcaline, in galvanotehnica, in procedeele de epurare a apelor reziduale. Esenta inventiei consta in aceea ca electrodul contine un substrat metalic din titan si aliajele acestuia si un strat activ depus pe el in forma de aliaj poros de cobalt-nichel-bor, cu includereain compozitia lui a Mo si/sau W si/sau Re. Procedeul de obtinere a electrodului consta in depunereape substratul metalic din titan si aliajele acestuia, tratat in prealabil cu hidruri, a unui stratactiv in forma de aliaj poros de cobalt-nichel-bor din solutiile, care contin sulfati de cobalt sinichel, sarea Seignette, saruri de Mo7+ si/sau W7+ si/sau Re7+, nitrat de taliu(I) si dimetilaminoboran, in urmatorul raport al componentelor, g/l:sulfat de nichel 5…10sulfat de cobalt 10…20sare Seignette 30…40saruri de Mo7+ si/sau W7+ si/sau Re7+ 15…20dimetilaminoboran 1…3nitrat de taliu(I) 0,001…0,002,depunerea se efectueaza la temperatura de 50…70°C si pH 6,5…10,0, la un raport dintre suprafata electrodului si volumul solutiei de 1 : (2…3), cu solubilizare ulterioara a borului din depunerea formata prin tratamentul anodic la o densitate a curentului de 1…2 A/dm2 timp de 10…15 min, in solutie de NaOH cu pH 10…12, in prezenta oxidantului, totodata in calitate de oxidant se utilizeaza peroxid de hidrogen si permanganat de potasiu inurmatorul raport al componentelor, g/l: hidroxidde sodiu 50…100peroxid de hidrogen de 33%, ml 30…50permanganat de potasiu 5…10.The invention relates to the obtaining of electrodes and can be used in electrochemistry, in industrial electrolysis and in alkaline solutions, in electroplating, in wastewater treatment processes. The essence of the invention is that the electrode contains a titanium metal substrate and its alloys and an active layer deposited on it in the form of a porous cobalt-nickel-boron alloy, including its composition of Mo and / or W and / or Re. The process of obtaining the electrode consists of depositing the titanium metal substrate and its alloys, previously treated with hydrides, of a layered porous cobalt-nickel-boron alloy in the solutions, containing sinichel cobalt sulphates, Seignette salt, salts. of Mo7 + and / or W7 + and / or Re7 +, thallium nitrate (I) and dimethylaminoborane, in the following component ratio, g / l: nickel sulphate 5 ... 10 cobalt sulphate 10 ... 20salignite 30 ... 40salts of Mo7 + and / or W7 + and / or Re7 + 15 ... 20 dimethylaminoborane 1 ... 3 thallium nitrate (I) 0.001 ... 0.002, deposition is carried out at 50 ... 70 ° C and pH 6.5 ... 10.0, at a ratio between the electrode surface and the volume of the solution of 1: (2 ... 3), with subsequent solubilization of boron from the deposit formed by the anodic treatment at a current density of 1 ... 2 A / dm2 for 10 ... 15 min, in NaOH solution with pH 10 ... 12, in the presence of the oxidant, at the same time as oxidant is used hydrogen peroxide and per potassium manganate inurmur component ratio, g / l: sodium hydroxide 50 ... 100% 33% hydrogen peroxide, 30 ... 50 potassium permanganate 5 ... 10.