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
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Journal ArticleDOI
Advanced Electrocatalysts with Single-Metal-Atom Active Sites.
Yuxuan Wang,Hongyang Su,Yanghua He,Ligui Li,Shangqian Zhu,Hao Shen,Pengfei Xie,Xianbiao Fu,Guangye Zhou,Chen Feng,Dengke Zhao,Fei Xiao,Xiaojing Zhu,Yachao Zeng,Minhua Shao,Shaowei Chen,Gang Wu,Jie Zeng,Chao Wang +18 more
TL;DR: This review aims to provide a comprehensive summary on the recent development of single-atom electrocatalysts for various energy-conversion reactions using state-of-the-art microscopic and spectroscopic techniques.
Journal ArticleDOI
Ultrafast Formation of Amorphous Bimetallic Hydroxide Films on 3D Conductive Sulfide Nanoarrays for Large-Current-Density Oxygen Evolution Electrocatalysis.
Xu Zou,Yipu Liu,Guo-Dong Li,Yuanyuan Wu,Da Peng Liu,Wang Li,Hai Wen Li,Dejun Wang,Dejun Wang,Yu Zhang,Xiaoxin Zou +10 more
TL;DR: Experimental results indicate that the effective integration of high catalytic reactivity, high structural stability, and high electronic conductivity into a single material system makes Ni-Fe-OH@Ni3 S2 /NF a remarkable catalytic ability for OER at large current densities.
Journal ArticleDOI
Cobalt Phosphide Hollow Polyhedron as Efficient Bifunctional Electrocatalysts for the Evolution Reaction of Hydrogen and Oxygen
Mengjia Liu,Jinghong Li +1 more
TL;DR: The as-prepared CoP hollow polyhedron, which have large specific surface area and high porosity providing rich catalytic active sites, show excellent electrocatalytic performances for both HER and OER in acidic and alkaline media, which are remarkably superior to those of particulate CoP (CoP particles) and comparable toThose of commercial noble-metal catalysts.
Journal ArticleDOI
Electrocatalysts for Nonaqueous Lithium–Air Batteries: Status, Challenges, and Perspective
TL;DR: In this article, the authors review the fundamental understanding of oxygen electrocatalysis in nonaqueous electrolytes and the status and challenges of new electrocatalysts' design and development.
Journal ArticleDOI
Theoretical Insights into Photoinduced Charge Transfer and Catalysis at Oxide Interfaces
TL;DR: In this article, the authors focus on processes that are essential in terms of photovoltaic and photocatlytic cells, and focus on the processes that can be improved.
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.