TY  - JOUR
PB  - Elsevier BV
Y1  - 2023/12//
VL  - 111
A1  - Wang, Qichang
A1  - Zhao, Jing
A1  - Yu, Ran
A1  - Shen, Dekui
A1  - Wu, Chunfei
A1  - Luo, Kai Hong
A1  - Xu, Lian-Hua
N2  - 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 (?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 ?10 value activity among the resulted catalysts as the ratio of (pyridinic N + pyrrolic N)/graphitic N is 1.33.
JF  - Journal of the Energy Institute
AV  - public
ID  - discovery10184068
SN  - 1743-9671
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
TI  - Differences in N species induced by pyrolysis temperature: D-band center adjustment over the biomass carbon-supported CoP for boosting hydrogen evolution reaction
KW  - Nitrogen species; 
Electronic metal-support interactions; D-band center; 
Work function; ?10; 
Hydrogen evolution reaction
UR  - http://dx.doi.org/10.1016/j.joei.2023.101444
ER  -