Navigation auf zora.uzh.ch

Search ZORA

ZORA (Zurich Open Repository and Archive)

[Ru(tmphen)(3)](2)[Fe(CN)(6)] and [Ru(phen)(3)][Fe(CN)(5)(NO)] complexes and formation of a heterostructured RuO2-Fe2O3 nanocomposite as an efficient alkaline HER and OER electrocatalyst

Mosallaei, Hamta; Hadadzadeh, Hassan; Foelske, Annette; Sauer, Markus; Amiri Rudbari, Hadi; Blacque, Olivier (2022). [Ru(tmphen)(3)](2)[Fe(CN)(6)] and [Ru(phen)(3)][Fe(CN)(5)(NO)] complexes and formation of a heterostructured RuO2-Fe2O3 nanocomposite as an efficient alkaline HER and OER electrocatalyst. Dalton Transactions, 51(16):6314-6331.

Abstract

Water electrolysis is one of the most capable processes for supplying clean fuel. Herein, two novel ionic Ru(ii)-Fe(ii) complexes, [Ru(tmphen)(3)](2)[Fe(CN)(6)] and [Ru(phen)(3)][Fe(CN)(5)(NO)], where tmphen = 3,4,7,8-tetramethyl-1,10-phenanthroline and phen = 1,10-phenanthroline, were synthesized and characterized by UV-Vis spectroscopy, elemental analysis, FT-IR, and single-crystal X-ray structural analysis. By thermally decomposing the [Ru(tmphen)(3)](2)[Fe(CN)(6)] complex at 600 degrees C for 4 h, a heterostructured RuO2-Fe2O3 nanocomposite was fabricated through a facile one-pot treatment and then characterized by FT-IR, XRD, FT-Raman, UV-Vis (DRS), ICP-OES, FE-SEM, TEM, TGA/DTG, BET, and XPS analyses, which revealed the formation of highly crystalline RuO2-Fe2O3 nanoparticles with an average size of 8-12 nm. The prepared nanocomposite was an efficient heterostructured electrocatalyst for performing water-splitting redox reaction processes, including hydrogen and oxygen evolution reactions (HER and OER) in alkaline solutions. In this regard, RuO2 and Fe2O3 samples were also prepared through thermal decomposition of [Ru(tmphen)(3)](NO3)(2) and K-4[Fe(CN)(6)] precursors, respectively, as control experiments to compare their HER and OER electrocatalytic activity with that of the RuO2-Fe2O3 nanocomposite. Specifically, the RuO2-Fe2O3 nanocomposite exhibited significant electrocatalytic performance, generating 10 mA cm(-2) current density at -148 and 292 mV overpotentials, and the Tafel slope results from fitting the LSV curves to the Tafel equation were -43 and 56.08 mV dec(-1) for the HER and OER, respectively. Therefore, the heterostructured RuO2-Fe2O3 nanocomposite can be viewed as a bi-functional electrocatalyst for HER and OER because it exploits the synergistic effects of heterostructures and active sites at its interface.

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Scopus Subject Areas:Physical Sciences > Inorganic Chemistry
Uncontrolled Keywords:Inorganic Chemistry
Language:English
Date:1 January 2022
Deposited On:09 Jan 2023 18:00
Last Modified:28 Oct 2024 02:38
Publisher:Royal Society of Chemistry
ISSN:1477-9226
OA Status:Green
Publisher DOI:https://doi.org/10.1039/d2dt00398h
Project Information:
  • Funder: Isfahan University of Technology
  • Grant ID:
  • Project Title:

Metadata Export

Statistics

Citations

Dimensions.ai Metrics
9 citations in Web of Science®
8 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

80 downloads since deposited on 09 Jan 2023
49 downloads since 12 months
Detailed statistics

Authors, Affiliations, Collaborations

Similar Publications