TY - JOUR

T1 - Influence of the Oxidized Carbon Nanotubes Modification Conditions on Their Catalytic Activity and Selectivity in the Oxygen Reduction Reaction to Hydrogen Peroxide

AU - Maltseva, N. V.

AU - Moseenkov, S. I.

AU - Lebedeva, M. V.

AU - Kozlov, D. V.

N1 - Authors are grateful to the VTAN Common Use Center of the Novosibirsk State University supported by the Ministry of Sciences and Higher Education of the Russian Federation under the Contract no. 075-12-2021-697 for the assistance in the performing of the transmission electron microscopy measurements. The electrocatalysts were prepared under financial support from the NTI Competence Center \u201CThe modelling and development of novel functional materials with targeted properties\u201D (the Novosibirsk State University). The materials\u2019 electrochemical activity was studied using the equipment and competence from the Youth Laboratory of composite materials for electronics (the Novosibirsk State University) under the State Contract no. FSUS-2022-0022.

PY - 2024/7

Y1 - 2024/7

N2 - Catalysts of the hydrogen peroxide cathodic synthesis are obtained from multiwalled carbon nanotubes pre-oxidized with nitric acid, follow by hydrogen reduction in the 300–500°C temperature range. Evaluation of physico-chemical properties of the catalysts showed the synthesis method used to be able controlling changes in the surface oxygen groups’ composition without any change in the multiwalled carbon nanotubes’ structure and morphology. Investigation of catalytic activity in the cathodic process for hydrogen peroxide production demonstrated the sample prepared by hydrogen reduction at 300°C with oxygen content of 5.2 at % (according to XPS data) to have the highest efficiency. The sample produced the hydrogen peroxide with the rate of 0.34 mol/(g h) and Faradaic efficiency of 78%. Increase in the reduction temperature above 300°C resulted in a decrease in the rate of Н2О2 accumulation without severe changes in Faradaic efficiency.

AB - Catalysts of the hydrogen peroxide cathodic synthesis are obtained from multiwalled carbon nanotubes pre-oxidized with nitric acid, follow by hydrogen reduction in the 300–500°C temperature range. Evaluation of physico-chemical properties of the catalysts showed the synthesis method used to be able controlling changes in the surface oxygen groups’ composition without any change in the multiwalled carbon nanotubes’ structure and morphology. Investigation of catalytic activity in the cathodic process for hydrogen peroxide production demonstrated the sample prepared by hydrogen reduction at 300°C with oxygen content of 5.2 at % (according to XPS data) to have the highest efficiency. The sample produced the hydrogen peroxide with the rate of 0.34 mol/(g h) and Faradaic efficiency of 78%. Increase in the reduction temperature above 300°C resulted in a decrease in the rate of Н2О2 accumulation without severe changes in Faradaic efficiency.

KW - hydrogen peroxide synthesis

KW - multi-walled carbon nanotubes

KW - oxygen reduction reaction

KW - oxygen-containing groups

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85198711237&origin=inward&txGid=d502e3bf37425114a9082b0aff6e3a26

UR - https://www.mendeley.com/catalogue/58d4b574-62de-3159-8e33-4d9366782f69/

U2 - 10.1134/S1023193524700137

DO - 10.1134/S1023193524700137

M3 - Article

VL - 60

SP - 544

EP - 556

JO - Russian Journal of Electrochemistry

JF - Russian Journal of Electrochemistry

SN - 1023-1935

IS - 7

ER -