| Title |
Sieros turinčių Co-Mo oksidinių dangų sintezė, struktūra ir elektrokatalizinės savybės / |
| Translation of Title |
Synthesis, structure and electrochemical properties of S-containing Co–Mo oxide films. |
| Authors |
Mardosaitė, Rasa |
| Full Text |
|
| Pages |
29 |
| Keywords [eng] |
electrochemistry ; electrocatalysis ; sulfur containing cobalt molybdenum oxide ; water splitting ; hydrogen generation |
| Abstract [eng] |
Water electrolysis would be one of the most economically and environmentally friendly, renewable method to produce hydrogen. However, one of the greatest challenges is to find the path toward an effective and noble-metal-free electrocatalyst formation. Recently, amorphous cobalt and molybdenum sulfide systems showed an increased interest in individual catalytic features. Particularly, the distinctive activity characteristics were prescribed for Co sulfides while the stability features were mostly expressed for Mo compounds. Substantial benefits could probably be provided if synergy would affect the mixed composition of Co and Mo sulfide compounds. In this work, one-step potentiodynamic electrodeposition was applied for the synthesis of various S-containing cobalt and molybdenum oxide films on conductive glass substrates. Amorphous S-containing cobalt oxide and molybdenum oxide (Co–O–S and Mo–O–S) films were successfully electrodeposited using thiourea–cobalt chloride and thiourea–ammonium molybdate baths. The codeposition of Co–O–S and Mo–O–S significantly improved the stability and activity properties of the prepared Co–Mo–O–S films for hydrogen evolution reaction in an aqueous phosphate solution (pH 7). It was determined that the activity of Co–Mo–O–S films was extremely dependent on the pH of the electrolysis bath, the precursors concentration and the number of electrodeposition cycles. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Summaries of doctoral thesis |
| Language |
Lithuanian |
| Publication date |
2019 |
