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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Metallic nickel nitride nanosheets realizing enhanced electrochemical water oxidation.
Kun Xu,Pengzuo Chen,Xiuling Li,Yun Tong,Hui Ding,Xiaojun Wu,Wangsheng Chu,Zhenmeng Peng,Changzheng Wu,Yi Xie +9 more
TL;DR: The finding suggests that metallic nitride nanosheets could serve as a new group of OER electrocatalysts with excellent property, and benefitting from enhanced electrical conductivity with metallic behavior and atomically disordered structure compared with bulk Ni3N and NiO nanOSheets.
Journal ArticleDOI
Oxygen Evolution Reaction Electrocatalysis on Transition Metal Oxides and (Oxy)hydroxides: Activity Trends and Design Principles
TL;DR: In this article, the authors discuss recent advances in understanding the oxygen evolution reaction (OER) in alkaline media for earth-abundant, first-row, transition-metal oxides and (oxy)hydroxides.
Journal ArticleDOI
Nitrogen-doped carbon nanomaterials as non-metal electrocatalysts for water oxidation.
TL;DR: The electrochemical and physical studies indicate that the high oxygen evolution activity of the nitrogen/carbon materials is from the pyridinic-nitrogen- or/and quaternary-Nitrogen-related active sites, suggesting that the non-metal catalysts will be a potential alternative to the use of transition metal-based oxygen evolution catalysts.
Journal ArticleDOI
Low Overpotential in Vacancy-Rich Ultrathin CoSe2 Nanosheets for Water Oxidation
Youwen Liu,Hao Cheng,Mengjie Lyu,Shaojuan Fan,Qinghua Liu,Wenshuai Zhang,Yuduo Zhi,Chengming Wang,Chong Xiao,Shiqiang Wei,Bangjiao Ye,Yi Xie +11 more
TL;DR: The results not only demonstrate the potential of a notable, affordable, and earth-abundant water oxidation electrocatalyst based on ultrathin CoSe2 nanosheets but also open up a promising avenue into the exploration of excellent active and durable catalysts toward replacing noble metals for oxygen electrocatalysis.
Journal ArticleDOI
Recent progress made in the mechanism comprehension and design of electrocatalysts for alkaline water splitting
TL;DR: In this paper, the authors describe the fundamentals of the hydrogen evolution reaction/oxygen evolution reaction (HER/OER) and construct efficient electrocatalysts based on the structure-activity relationship.
References
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Powering the planet: Chemical challenges in solar energy utilization
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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.