Discovery of Crystal Structure-Stability Correlation in Iridates for Oxygen Evolution Electrocatalysis in Acid

Cited 3 time in webofscience Cited 0 time in scopus
  • Hit : 52
  • Download : 0
One of the critical bottlenecks in many energy-conversion devices associated with the oxygen evolution reaction (OER) is to find adequate catalysts that both show high activity and endure extreme pH conditions of an electrolyte under anodic potentials. As Ir-based compositions are regarded to show better resistance to acidic environments than any other transition metals, a surge of research on many complex iridates recently has been carried out. However, the intrinsic structure-property relationship in iridates remains elusive, although several examples showing exceptional OER activity were reported. Here we discover that eleven different A(x)Ir(y)O(z)-type oxides (A = Ca, Sr, Ba, Y, Pr, Nd) with high OER activity can be categorized into three distinct groups in terms of the [IrO6] connection geometry. Furthermore, a notable common correlation among the crystal structure, activity variation, and stability during the OER is identified in each of the groups. If the iridates consist of a strong edge- or facesharing [IrO6] configuration, their stability and activity are preserved during a remarkably large number of anodic cycles. In addition to comparing the OER performance between many high-activity iridates, our findings emphasize that the [IrO6] connectivity is a crucial structural factor governing the overall longevity of Ir-based catalysts.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2020-11
Language
English
Article Type
Article
Citation

ENERGY & ENVIRONMENTAL SCIENCE, v.13, no.11, pp.4178 - 4188

ISSN
1754-5692
DOI
10.1039/d0ee01389g
URI
http://hdl.handle.net/10203/278602
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 3 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0