Sodium borohydride hydrolysis over mesoporous spherical carbon obtained from jasmine flower extract

In this contribution, we have utilized Jasmine flower (Tabernaemontana divaricata) extract as a green source during the synthesis of carbon under hydrothermal conditions. Phase characterization indicated that the prepared material is graphitic carbon with various functional groups. TEM images revealed that the prepared material is composed of quasispherical particles having diameters in the 15 nm range, which are accumulated in microspherical ones as indicated by SEM images. N2-adsorption measurements indicated that this spherical carbon possesses a mesoporous character. XPS data revealed the coexistence of various C, N, and O species at the surface of this carbon. Sodium borohydride (NaBH4) hydrolysis activity of the synthesized carbon was investigated over the 25-45 degrees C range of temperature. The catalytic activity was found to increase with both the temperature and NaBH4 concentration (up to 5 wt. %). Moreover, the activity was quenched in the presence of strong bases.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.