Synthetic Mechanism Studies of Iron Selenides: An Emerging Class of Materials for Electrocatalysis
| Autor: | David J. Fermín, David Cherns, Bo Hou, David Benito-Alifonso, M. Carmen Galan, Richard F. Webster |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
iron oxide
synthetic mechanisms Iron oxide TP1-1185 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Chalcogen chemistry.chemical_compound Oleylamine Selenide iron selenides electrocatalysis Reactivity (chemistry) Physical and Theoretical Chemistry QD1-999 iron dichalcogenide Chemical technology Trioctylphosphine 021001 nanoscience & nanotechnology Combinatorial chemistry 0104 chemical sciences Chemistry chemistry Water splitting Tributylphosphine 0210 nano-technology |
| Zdroj: | Catalysts Volume 11 Issue 6 Catalysts, Vol 11, Iss 681, p 681 (2021) Fermin, D J, Hou, B, Benito-Alifonso, D, Webster, R, Cherns, D & Galan, M C 2021, ' Synthetic Mechanism Studies of Iron Selenides: An Emerging Class of Materials for Electrocatalysis ', Catalysts, vol. 11, no. 6, 681 . https://doi.org/10.3390/catal11060681 |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal11060681 |
| Popis: | Solution-processed iron selenide nanocrystals (NCs) have recently attracted considerable attention in electrocatalysis water splitting. Nevertheless, a primary challenge in current iron-based NCs chemical synthesis is controlling phase purities between each chalcogen (monochalcogenide, dichalcogenides, and oxides), which requires a comprehensive understanding of the reaction mechanisms at the early stages of nucleation. Herein, we investigate the fundamental steps in transforming molecular organoiron and organoselenium precursors to iron selenides NCs with the view of developing universal synthesis protocols for phase pure metal selenium and metal oxides NCs. The main intermediate species and volatile by-products are identified by high-resolution electron microscopy and Nuclear Magnetic Resonance (NMR) spectroscopy (1H, 13C, and 31P). Experimental evidence suggests that the phase determining factor is the coordinating reactivity difference between olefins (1-octadecene, oleylamine), tributylphosphine and trioctylphosphine associated with their corresponding Se bond cleavage. This work proposes organoselenium interconversion reaction mechanisms during iron selenides synthesis, offering a universal synthetic strategy for other electrocatalytically or photocatalytically active layered metal selenides materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|