@article{discovery10184068,
         journal = {Journal of the Energy Institute},
           month = {December},
           title = {Differences in N species induced by pyrolysis temperature: D-band center adjustment over the biomass carbon-supported CoP for boosting hydrogen evolution reaction},
            year = {2023},
       publisher = {Elsevier BV},
          volume = {111},
            note = {This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.},
            issn = {1743-9671},
        keywords = {Nitrogen species; 
Electronic metal-support interactions; D-band center; 
Work function; {\ensuremath{\eta}}10; 
Hydrogen evolution reaction},
        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 oC) 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 ({\ensuremath{\eta}}10) 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 {\ensuremath{\eta}}10 value activity among the resulted catalysts as the ratio of (pyridinic N + pyrrolic N)/graphitic N is 1.33.},
             url = {http://dx.doi.org/10.1016/j.joei.2023.101444},
          author = {Wang, Qichang and Zhao, Jing and Yu, Ran and Shen, Dekui and Wu, Chunfei and Luo, Kai Hong and Xu, Lian-Hua}
}