Open AccessA new electrocatalytic systems based on bisorbents from rice husk
Author(s) -
Bazarbai Alibayevich Serikbaev,
Duisek Haisagalievich Kamysbaev,
Galina Sergeevna Arbuz,
Dinara Alimbai,
Akbayan Arin
Publication year - 2017
Publication title -
habaršy - a̋l-farabi atyndag̣y k̦azak̦ memlekettik ụlttyk̦ universiteti. himiâ seriâsy/chemical bulletin of kazakh national university
Language(s) - English
Resource type - Journals
eISSN - 2312-7554
pISSN - 1563-0331
DOI - 10.15328/cb820
Subject(s) - electrocatalyst , husk , electrochemistry , carbonization , sorption , raw material , electrolyte , materials science , chemical engineering , thermal stability , carbon fibers , redox , electrode , chemistry , inorganic chemistry , composite number , composite material , organic chemistry , adsorption , scanning electron microscope , botany , engineering , biology
The article studies the synthesis of carbon-based and amorphous silicon dioxide bisorbents. Sorption characteristics of new bases for producing modified systems to use them in electrocatalysis are presented. For preparation of SiO2/C baseas rice husk (RH) was chosen as the raw material. A series of experiments was performed to optimize parameters of the RH carbonization by varying temperature and time of the process. The material obtained from the RH thermal destruction products was modified by the heteropoly compound (NH4)3[Co3O6Mo6O18H6] · nH2O and thermally reduced by hydrogen. The registration of the voltammetric curves was carried out at pH = 6.22 in the background electrolyte of 0.1 M Na2SO4 and pH = 4.45 in 0.1 M KC8H5O4.The potential ranges were -1.2В – 1.2 V and -1.0 V – 0.2 respectively. The mechanism of the electrochemical processes on these materials has been studied. It is shown that the obtained composite electrode materials exhibit electrochemical activity in the investigated potential regions, and they are characterized by the stability of redox properties. The main ways of using the obtained composites are outlined.