eprintid: 10184068
rev_number: 11
eprint_status: archive
userid: 699
dir: disk0/10/18/40/68
datestamp: 2023-12-19 09:26:17
lastmod: 2024-10-27 07:10:06
status_changed: 2023-12-19 09:26:17
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Wang, Qichang
creators_name: Zhao, Jing
creators_name: Yu, Ran
creators_name: Shen, Dekui
creators_name: Wu, Chunfei
creators_name: Luo, Kai Hong
creators_name: Xu, Lian-Hua
title: Differences in N species induced by pyrolysis temperature: D-band center adjustment over the biomass carbon-supported CoP for boosting hydrogen evolution reaction
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F45
keywords: Nitrogen species; 
Electronic metal-support interactions; D-band center; 
Work function; η10; 
Hydrogen evolution reaction
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
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.
date: 2023-12
date_type: published
publisher: Elsevier BV
official_url: http://dx.doi.org/10.1016/j.joei.2023.101444
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2104619
doi: 10.1016/j.joei.2023.101444
lyricists_name: Luo, Kai
lyricists_id: KLUOX54
actors_name: Luo, Kai
actors_id: KLUOX54
actors_role: owner
full_text_status: public
publication: Journal of the Energy Institute
volume: 111
article_number: 101444
issn: 1743-9671
citation:        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 <https://doi.org/10.1016/j.joei.2023.101444>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10184068/1/Luo%202023%20JOEI%20hydrogen%20accepted.pdf