XPS investigation of MnO2 deposits functionalized with graphitic carbon nitride

Mattia Benedet, Alberto Gasparotto, Gian Andrea Rizzi, Chiara Maccato, Davide Mariotti, Ruairi McGlynn, Davide Barreca

Research output: Contribution to journalArticlepeer-review

Abstract

Composite materials based on MnO2 deposits functionalized with graphitic carbon nitride (gCN) nanostructures are promising (photo)electrocatalysts for oxygen evolution reaction (OER). Besides the individual properties of the two electrode components, mutual interactions at their interface can also exert a significant influence on functional performances. In this work, MnO2 deposits are synthesized by plasma enhanced-chemical vapor deposition on Ni foam supports and subsequently decorated with two different forms of carbon nitride via electrophoretic deposition. Structural and morphological analyses revealed the formation of β-MnO2 2D structures hierarchically assembled into flowerlike architectures, whose surface appeared decorated by 3D particles built up from gCN nanoflakes. Based on the intimate contact between the two semiconductors, an effective electronic and chemical coupling was established at their interface. In the following, we report on a comparative XPS characterization of a bare MnO2 electrode material and of two MnO2-gCN composite systems prepared from different carbon nitride powders. Survey spectra as well as detailed scans for C 1s, N 1s, O 1s, and Mn 2p regions are presented and critically discussed.
Original languageEnglish
Article number024018
Pages (from-to)1-17
Number of pages17
JournalSurface Science Spectra
Volume30
Issue number2
Early online date29 Aug 2023
DOIs
Publication statusPublished (in print/issue) - 1 Dec 2023

Bibliographical note

Funding Information:
The authors acknowledge funding received from CNR (Progetti di Ricerca @CNR—avviso 2020—ASSIST), Padova University (P-DiSC#04BIRD2020-UNIPD EUREKA, DOR 2020-2023), INSTM Consortium (INSTM21PDGASPAROTTO—NANO, INSTM21PDBARMAC—ATENA), AMGA Foundation (NYMPHEA project), and EPSRC (EP/V055232/1 and EP/R008841/1). Thanks are also due to Dr. Andrea Gallo for his valuable experimental support. MAT

Publisher Copyright:
© 2023 Author(s).

Keywords

  • Surfaces, Coatings and Films
  • Surfaces and Interfaces
  • Condensed Matter Physics
  • gCN
  • x-ray photoelectron spectroscopy
  • electrophoretic deposition
  • PE-CVD
  • MnO

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