Electrocatalysts Based on Novel Carbon Forms for the Oxidation of Sulphite

Catalysts

Elena Razkazova-Velkova¹  Nadezhda Shukova¹  Dzhamal Uzun²  George Pchelarov²  Konstantin Petrov²  Adriana Gigova²  Ognian Dimitrov²  Sasho Vassilev²  Aleksandar Tsanev³ 

[1] Institute of Chemical Engineering, Bulgarian Academy of Sciences, G. Bonchev St., Building 103, 1113 Sofia, Bulgaria;Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, G. Bonchev St., Building 10, 1113 Sofia, Bulgaria;Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, G. Bonchev St., Building 11, 1113 Sofia, Bulgaria;

关键词: higher fullerenes;    C₆₀/C₇₀;    carbon nanotubes;    manganese oxides;    electrocatalyst;    environment;   

DOI  :  10.3390/catal12010093

来源: DOAJ

【 摘 要 】

Described herewith is an electrochemical method to decontaminate sulphur compounds. Studies were carried out of sulphites (SO₃²⁻) oxidation on a range of anode catalysts. The electrocatalysts were characterized by scanning electron microscopy, XRD, XPS and BET. Polarization curves were recorded of electrodes incorporating lyophilized higher fullerenes and manganese oxides. The experiments showed that lyophilized higher fullerenes and C₆₀/C₇₀ fullerene catalysts in conjunction with manganese oxides electrochemically convert sulphites (SO₃²⁻) to sulphates (SO₄²⁻). The oxidation products do not poison the electrodes. The XPS analysis shows that the catalysts incorporating DWCNTs, MWCNTs and higher fullerenes have a higher concentration of sp³C carbon bonding leading to higher catalytic activity. It is ascertained that higher fullerenes play a major role in the synthesis of more effective catalysts. The electrodes built by incorporating lyophilized catalysts containing higher fullerenes and manganese oxides are shown as most promising in the effective electrochemical decontamination of industrial and natural wastewaters.

【 授权许可】

Unknown