Wang, Qichang;
Zhao, Jing;
Yu, Ran;
Shen, Dekui;
Wu, Chunfei;
Luo, Kai Hong;
Xu, Lian-Hua;
(2023)
Differences in N species induced by pyrolysis temperature: D-band center adjustment over the biomass carbon-supported CoP for boosting hydrogen evolution reaction.
Journal of the Energy Institute
, 111
, Article 101444. 10.1016/j.joei.2023.101444.
Preview |
Text
Luo 2023 JOEI hydrogen accepted.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Nitrogen (N) species in biomass-based carbon can be adjusted through pyrolysis at different temperatures, optimizing the valence band structure of supported metal nanoparticles through electronic metal-support interactions (EMSIs). Herein, ginkgo leaves-based carbon supported cobalt phosphide (CoP@NSPC-T, T = 850, 900 and 950 °C) was obtained via carbothermal reduction method at different pyrolysis temperature. Pyridinic N and pyrrolic N in carbon lattice were dramatically decreased with pyrolysis temperature raised, whereas the graphitic N showed the opposite trend. The change in N species (pyridinic N, pyrrolic N and graphitic N) reconfigured the valence band structure of CoP@NSPC-T, inducing the enhancement of work function and the upshift of d-band center. A relationship between the ratio of (pyridinic N + pyrrolic N)/graphitic N, work function, d-band center, and HER activity (η10) of catalysts was established. CoP@NSPC-900 with a moderate work function value and d-band center tend to achieve a balance for Volmer process and Heyrovsky process, exhibiting the lowest η10 value activity among the resulted catalysts as the ratio of (pyridinic N + pyrrolic N)/graphitic N is 1.33.
| Type: | Article |
|---|---|
| Title: | Differences in N species induced by pyrolysis temperature: D-band center adjustment over the biomass carbon-supported CoP for boosting hydrogen evolution reaction |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.joei.2023.101444 |
| Publisher version: | http://dx.doi.org/10.1016/j.joei.2023.101444 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Nitrogen species; Electronic metal-support interactions; D-band center; Work function; η10; Hydrogen evolution reaction |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10184068 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
