N/P Co-doped Micro-/Mesoporous Carbons Derived from Polyvinyl Pyrrolidone–Zn0.2@ZIF-67 with Tunable Metal Valence States towards Efficient Water Splitting

Yang Ming, Yidi Wang, Jiachuan Hua, Chang Liu, Jiashen Li, Bin Fei (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

The enhancement of electrocatalytic water splitting by modulating the intrinsic electronic environment of active sites has recently attracted lots of interest. Herein, cobalt-cobalt oxide (CoOx) at carbons derived from metal-organic frameworks (Zn0.2@ZIF-67) have been modulated by using post-phosphine (P-CoOx/NCs), acid leaching (Co/NCs), and oxidation (O−CoOx/NCs) treatments. With the assistance of polyvinyl pyrrolidone, the resultant carbons obtain a high surface area (645.7 m2 g−1) as well as a micro-/mesoporous system after carbonization at 920 °C. These advantages not only enhance the catalytic performance of catalysts, but also facilitate the charge transfer between interfaces towards the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). As a result, the constructed water splitting cell fabricated with 900P-CoOx/NCs requires a low overpotential (89 mV and 343 mV vs. reservable hydrogen electrode respectively) to drive HER and OER at 10 mA cm−2, a low cell voltage (1.69 V), and a high stability with only 4.9 % decay after 15 hours operation in the alkaline medium.

Original languageEnglish
Article numbere202300283
JournalChemElectroChem
Volume10
Issue number18
DOIs
Publication statusPublished - 14 Sept 2023

Keywords

  • heteroatom doping
  • mesoporous carbons
  • metal-organic frameworks
  • phosphine modulation
  • water splitting reaction

ASJC Scopus subject areas

  • Catalysis
  • Electrochemistry

Fingerprint

Dive into the research topics of 'N/P Co-doped Micro-/Mesoporous Carbons Derived from Polyvinyl Pyrrolidone–Zn0.2@ZIF-67 with Tunable Metal Valence States towards Efficient Water Splitting'. Together they form a unique fingerprint.

Cite this