TY - JOUR
T1 - Direct O-O Coupling Promoted the Oxygen Evolution Reaction by Dual Active Sites from Ag/LaNiO3Interfaces
AU - Lee, Seonggyu
AU - Ashwin Kishore, M. R.
AU - Kim, Dongkyu
AU - Kang, Hari
AU - Chun, Jinyoung
AU - Oh, Lee Seul
AU - Park, Jong Hyeok
AU - Kim, Hyung Ju
AU - Yoo, Jong Suk
AU - Lim, Eunho
N1 - Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/12/26
Y1 - 2022/12/26
N2 - The development of highly active oxygen evolution reaction (OER) electrocatalysts is one of the most important issues for advanced water electrolysis technology with high energy efficiency. However, according to the conventional adsorbate evolution mechanism (AEM), the OER activity is theoretically limited with high overpotential by the scaling relationship in binding energies of the reaction intermediates. We propose an attractive strategy to promote OER activity by direct O-O coupling at the interfacial active sites for Ag (x) nanoparticles decorated on La1-xNiO3perovskite electrocatalysts (Ag/LNO-x). The overpotential of the Ag/LNO-0.05 was 315 mV at a current density of 10 mA cm-2geo, which was much lower than that of other Ag/LNO-x (x = 0, 0.3, and 0.5) and commercial iridium oxide (IrO2, 398 mV) electrocatalysts. The theoretical calculation revealed that the improved OER electrocatalytic activity of Ag/LNO-x originated from a change in the reaction mechanism at the interfacial active sites. At the interface, oxygen evolution via the dual-site mechanism with direct O-O coupling becomes more favorable than that via the conventional AEM. Finally, due to the formation of the interfacial active sites, the synthesized Ag/LNO-0.05 electrocatalyst showed significantly enhanced OER activity, which was 20 times higher mass activity before and 74 times after an accelerated durability test than that of the IrO2electrocatalyst.
AB - The development of highly active oxygen evolution reaction (OER) electrocatalysts is one of the most important issues for advanced water electrolysis technology with high energy efficiency. However, according to the conventional adsorbate evolution mechanism (AEM), the OER activity is theoretically limited with high overpotential by the scaling relationship in binding energies of the reaction intermediates. We propose an attractive strategy to promote OER activity by direct O-O coupling at the interfacial active sites for Ag (x) nanoparticles decorated on La1-xNiO3perovskite electrocatalysts (Ag/LNO-x). The overpotential of the Ag/LNO-0.05 was 315 mV at a current density of 10 mA cm-2geo, which was much lower than that of other Ag/LNO-x (x = 0, 0.3, and 0.5) and commercial iridium oxide (IrO2, 398 mV) electrocatalysts. The theoretical calculation revealed that the improved OER electrocatalytic activity of Ag/LNO-x originated from a change in the reaction mechanism at the interfacial active sites. At the interface, oxygen evolution via the dual-site mechanism with direct O-O coupling becomes more favorable than that via the conventional AEM. Finally, due to the formation of the interfacial active sites, the synthesized Ag/LNO-0.05 electrocatalyst showed significantly enhanced OER activity, which was 20 times higher mass activity before and 74 times after an accelerated durability test than that of the IrO2electrocatalyst.
KW - electrocatalysts
KW - interfacial active sites
KW - LaNiO
KW - oxygen evolution reactions
KW - silver
UR - http://www.scopus.com/inward/record.url?scp=85139560172&partnerID=8YFLogxK
U2 - 10.1021/acsaem.2c01232
DO - 10.1021/acsaem.2c01232
M3 - Article
AN - SCOPUS:85139560172
SN - 2574-0962
VL - 5
SP - 14658
EP - 14668
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 12
ER -