Lanthanides
Regulated the Amorphization–Crystallization
of IrO2 for Outstanding OER Performance
Posted on 2020-07-27 - 11:03
Research
has been focused on regulating the amorphous surface of
Ir-based materials to achieve a higher oxygen evolution reaction (OER)
activity. The IrOx amorphous layer is
generally considered to be substantial enough to break the limitation
created by the conventional adsorbate evolution mechanism (AEM) in
acidic media. In this work, we used lanthanides to regulate IrOx amorphization–crystallization through
inhibiting the crystallization of iridium atoms in the calcination
process. The chosen route created abundant crystalline–amorphous
(c-a) interfaces, which greatly enhanced the charge
transfer kinetics and the stability of the materials. The mass activity
of iridium in the synthesized IrO2@LuIr1–nOx(OH)y structure reached 128.3 A/gIr, which is 14.6-fold
that of the benchmark IrO2. All the IrO2@LnIr1–nOx(OH)y (Ln = La–Lu) structures reflected
290–300 mV of overpotential at 10 mA/cmgeo2. We demonstrate that a highly active c-a interface
possesses an efficient charge transfer capability and is conducive
to the stability of the activated oxygen species. The surface-activated
oxygen species and the tensile strain [IrO6] octahedron
regulated by lanthanides are synergistically beneficial for increasing
the intrinsic OER activity. Our research findings introduce c-a interface generation by the regulation of lanthanides
as a new method for the rational design of robust OER catalysts.
CITE THIS COLLECTION
DataCiteDataCite
3 Biotech3 Biotech
3D Printing in Medicine3D Printing in Medicine
3D Research3D Research
3D-Printed Materials and Systems3D-Printed Materials and Systems
4OR4OR
AAPG BulletinAAPG Bulletin
AAPS OpenAAPS Open
AAPS PharmSciTechAAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität HamburgAbhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)ABI Technik (German)
Academic MedicineAcademic Medicine
Academic PediatricsAcademic Pediatrics
Academic PsychiatryAcademic Psychiatry
Academic QuestionsAcademic Questions
Academy of Management DiscoveriesAcademy of Management Discoveries
Academy of Management JournalAcademy of Management Journal
Academy of Management Learning and EducationAcademy of Management Learning and Education
Academy of Management PerspectivesAcademy of Management Perspectives
Academy of Management ProceedingsAcademy of Management Proceedings
Academy of Management ReviewAcademy of Management Review
Ma, Chenglong; Sun, Wei; Qamar Zaman, Waqas; Zhou, Zhenhua; Zhang, Hao; Shen, Qicheng; et al. (2020). Lanthanides
Regulated the Amorphization–Crystallization
of IrO2 for Outstanding OER Performance. ACS Publications. Collection. https://doi.org/10.1021/acsami.0c08969