Journal ArticleDOI
A perovskite oxide optimized for oxygen evolution catalysis from molecular orbital principles.
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TLDR
The high activity of BSCF was predicted from a design principle established by systematic examination of more than 10 transition metal oxides, which showed that the intrinsic OER activity exhibits a volcano-shaped dependence on the occupancy of the 3d electron with an eg symmetry of surface transition metal cations in an oxide.Abstract:
The efficiency of many energy storage technologies, such as rechargeable metal-air batteries and hydrogen production from water splitting, is limited by the slow kinetics of the oxygen evolution reaction (OER). We found that Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3–δ (BSCF) catalyzes the OER with intrinsic activity that is at least an order of magnitude higher than that of the state-of-the-art iridium oxide catalyst in alkaline media. The high activity of BSCF was predicted from a design principle established by systematic examination of more than 10 transition metal oxides, which showed that the intrinsic OER activity exhibits a volcano-shaped dependence on the occupancy of the 3d electron with an e g symmetry of surface transition metal cations in an oxide. The peak OER activity was predicted to be at an e g occupancy close to unity, with high covalency of transition metal–oxygen bonds.read more
Citations
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Journal ArticleDOI
In-situ local phase-transitioned MoSe2 in La0.5Sr0.5CoO3-δ heterostructure and stable overall water electrolysis over 1000 hours
Nam Khen Oh,Changmin Kim,Junghyun Lee,Ohhun Kwon,Yunseong Choi,Gwan Yeong Jung,Hyeong Yong Lim,Sang Kyu Kwak,Guntae Kim,Hyesung Park +9 more
TL;DR: Perovskite-oxide and molybdenum sulfide heterostructures are prepared as bifunctional water-splitting electrocatalysts that showed excellent stability at the high current density over 1,000 h, which is exceptionally better than the stability of the state-of-the-art platinum and iridium oxide couple.
Journal ArticleDOI
Surface reconstruction engineering of cobalt phosphides by Ru inducement to form hollow Ru-RuPx-CoxP pre-electrocatalysts with accelerated oxygen evolution reaction
Lei Wang,Quan Zhou,Zonghua Pu,Zhang Qi,Xueqin Mu,Haiyan Jing,Suli Liu,Changyun Chen,Shichun Mu +8 more
TL;DR: In this article, a facile solid-liquid-phase chemical method was adopted to yield hollow Ru-RuPx-CoxP polyhedra, which showed remarkable high OER catalytic activity (η10 = 291mV) and stability (at least 10000 cycles).
Journal ArticleDOI
Recent Advances in Perovskite Oxides as Electrode Materials for Nonaqueous Lithium–Oxygen Batteries
TL;DR: In this article, the effect of nanostructure and morphology on oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) on the surface of perovskite oxides is discussed.
Journal ArticleDOI
High activity and durability of novel perovskite electrocatalysts for water oxidation
TL;DR: In this article, a family of highly active and durable perovskite oxides is proposed to lower the oxygen evolution reaction (OER) barriers in water splitting and further improvement of their activity and durability is an important objective.
Journal ArticleDOI
Hierarchical Mesoporous/Macroporous Perovskite La0.5Sr0.5CoO3-x Nanotubes: A Bifunctional Catalyst with Enhanced Activity and Cycle Stability for Rechargeable Lithium Oxygen Batteries.
Guoxue Liu,Hongbin Chen,Lu Xia,Suqing Wang,Liang-Xin Ding,Dongdong Li,Dongdong Li,Kang Xiao,Sheng Dai,Haihui Wang,Haihui Wang +10 more
TL;DR: The synergy of high catalytic activity and hierarchical mesoporous/macroporous nanostructured perovskite-type catalysts results in the Li-O2 batteries with good rate capability and excellent cycle stability.
References
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Powering the planet: Chemical challenges in solar energy utilization
Nathan S. Lewis,Daniel G. Nocera +1 more
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Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs
TL;DR: In this article, the authors quantified the activities and voltage loss modes for state-of-the-art MEAs (membrane electrode assemblies), specifies performance goals needed for automotive application, and provides benchmark oxygen reduction activities for state of the art platinum electrocatalysts.
Journal ArticleDOI
Improved Oxygen Reduction Activity on Pt3Ni(111) via Increased Surface Site Availability
Vojislav R. Stamenkovic,Vojislav R. Stamenkovic,Ben Fowler,Bongjin Simon Mun,Guofeng Wang,Philip N. Ross,Chris Lucas,Nenad M. Markovic +7 more
TL;DR: It is demonstrated that the Pt3Ni( 111) surface is 10-fold more active for the ORR than the corresponding Pt(111) surface and 90-foldMore active than the current state-of-the-art Pt/C catalysts for PEMFC.
Journal ArticleDOI
In Situ Formation of an Oxygen-Evolving Catalyst in Neutral Water Containing Phosphate and Co2+
TL;DR: A catalyst that forms upon the oxidative polarization of an inert indium tin oxide electrode in phosphate-buffered water containing cobalt (II) ions is reported that not only forms in situ from earth-abundant materials but also operates in neutral water under ambient conditions.