In:
Angewandte Chemie International Edition, Wiley, Vol. 59, No. 6 ( 2020-02-03), p. 2313-2317
Abstract:
Ferric oxides and (oxy)hydroxides, although plentiful and low‐cost, are rarely considered for oxygen evolution reaction (OER) owing to the too high spin state (e g filling ca. 2.0) suppressing the bonding strength with reaction intermediates. Now, a facile adsorption–oxidation strategy is used to anchor Fe III atomically on an ultrathin TiO 2 nanobelt to synergistically lower the spin state (e g filling ca. 1.08) to enhance the adsorption with oxygen‐containing intermediates and improve the electro‐conductibility for lower ohmic loss. The electronic structure of the catalyst is predicted by DFT calculation and perfectly confirmed by experimental results. The catalyst exhibits superior performance for OER with overpotential 270 mV @10 mA cm −2 and 376 mV @100 mA cm −2 in alkaline solution, which is much better than IrO 2 /C and RuO 2 /C and is the best iron‐based OER catalyst free of active metals such as Ni, Co, or precious metals.
Type of Medium:
Online Resource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.201913080
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2011836-3
detail.hit.zdb_id:
123227-7