Journal ArticleDOI
Understanding the Mechanism of the Oxygen Evolution Reaction with Consideration of Spin
Xiaoning Li,Zhenxiang Cheng,Xiaolin Wang +2 more
- Vol. 4, Iss: 1, pp 136-145
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TLDR
In this paper, the authors discuss electron behaviors during OER by taking into consideration of spin attribute and conclude that three in four electrons being extracted from adsorbates should be in the same spin direction before O=O formation, superimposing high requirements on the spin structure of electrocatalysts.Abstract:
The oxygen evolution reaction (OER) with its intractably high overpotentials is the rate-limiting step in many devices, including rechargeable metal–air batteries, water electrolysis systems and solar fuel devices. Correspondingly, spin state transitions from spin singlet OH–/H2O reactants to spin triplet O2 product have not yet received enough attention. In view of this, this article will discuss electron behaviours during OER by taking into consideration of spin attribute. The main conclusion is that, regardless of the possible adopted mechanisms (the adsorbate evolution mechanism or the lattice oxygen mechanism), the underlying rationale of OER is that three in four electrons being extracted from adsorbates should be in the same spin direction before O=O formation, superimposing high requirements on the spin structure of electrocatalysts. Therefore, upon fully understanding of the OER mechanism with considerations of spin, the awareness of the coupling between spin, charge, orbital and lattice parameters is necessary in the optimization of geometric and electronic structures in transition metal systems. Based on this, this article will discuss the possible dependency of OER efficiency on the electrocatalyst spin configuration, and the relevance of well-recognized factors with spin, including the crystal field, coordination, oxidation, bonding, the eg electron number, conductivity and magnetism. It is hoped that this article will clarify the underlying physics of OER to provide rational guidance for more effective design of energy conversion electrocatalysts.read more
Citations
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Journal ArticleDOI
Water electrolysis: from textbook knowledge to the latest scientific strategies and industrial developments
Marian Chatenet,Bruno G. Pollet,Dario R. Dekel,Fabio Dionigi,Jonathan Deseure,Pierre Millet,Richard D. Braatz,Martin Z. Bazant,Michael Eikerling,Iain Staffell,Paul Balcombe,Yang Shao-Horn,Helmut Schäfer +12 more
TL;DR: In this paper , the authors present a review of the fundamentals of electrocatalytically initiated water splitting and the very latest scientific findings from university and institutional research, also covering specifications and special features of the current industrial processes and those processes currently being tested in large-scale applications.
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Self-Supported Electrocatalysts for Practical Water Electrolysis
Journal ArticleDOI
Design and Synthesis of Hollow Nanostructures for Electrochemical Water Splitting
TL;DR: Some recent progress in the structural design of micro-/nanostructured hollow materials as advanced electrocatalysts for water splitting is summarized and the design principles and corresponding strategies toward highly effective hollow electrocatalyststs for oxygen/hydrogen evolution reactions are highlighted.
Journal ArticleDOI
Research Progress of Oxygen Evolution Reaction Catalysts for Electrochemical Water Splitting.
Yanying Liu,Daojin Zhou,Tianyin Deng,Guangli He,Aibing Chen,Xiaoming Sun,Yuhua Yang,Ping Miao +7 more
TL;DR: In this article, the authors summarized the research progress of anode OER catalysts for hydrogen production by electrochemical water splitting in recent years, for noble metal and non-noble metal catalysts.
Journal ArticleDOI
Interface Engineering of Heterogeneous CeO2-CoO Nanofibers with Rich Oxygen Vacancies for Enhanced Electrocatalytic Oxygen Evolution Performance.
TL;DR: In this article, a new nanofibrous hybrid structure with the interface connecting the surface of CeO2 and CoO as a highperformance electrocatalyst toward the oxygen evolution reaction (OER) through an electrospinning-calcination-reduction process is presented.
References
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Journal ArticleDOI
Noble metal-free hydrogen evolution catalysts for water splitting
Xiaoxin Zou,Yu Zhang +1 more
TL;DR: This review highlights the recent research efforts toward the synthesis of noble metal-free electrocatalysts, especially at the nanoscale, and their catalytic properties for the hydrogen evolution reaction (HER), and summarizes some important examples showing that non-Pt HER electrocatsalysts could serve as efficient cocatalysts for promoting direct solar-to-hydrogen conversion in both photochemical and photoelectrochemical water splitting systems, when combined with suitable semiconductor photocatalyst.
Journal ArticleDOI
A perovskite oxide optimized for oxygen evolution catalysis from molecular orbital principles.
TL;DR: 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.
Journal ArticleDOI
Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces
Isabela C. Man,Hai-Yan Su,Federico Calle-Vallejo,Heine Anton Hansen,José I. Martínez,Nilay İnoğlu,John R. Kitchin,Thomas F. Jaramillo,Jens K. Nørskov,Jan Rossmeisl +9 more
TL;DR: In this article, a large database of HO* and HOO* adsorption energies on oxide surfaces was used to analyze the reaction free energy diagrams of all the oxides in a general way.
Journal ArticleDOI
Design principles for oxygen-reduction activity on perovskite oxide catalysts for fuel cells and metal–air batteries
Jin Suntivich,Hubert A. Gasteiger,Hubert A. Gasteiger,Naoaki Yabuuchi,Haruyuki Nakanishi,John B. Goodenough,Yang Shao-Horn +6 more
TL;DR: These findings reflect the critical influences of the σ orbital and metal-oxygen covalency on the competition between O(2)(2-)/OH(-) displacement and OH(-) regeneration on surface transition-metal ions as the rate-limiting steps of the ORR, and highlight the importance of electronic structure in controlling oxide catalytic activity.
Journal ArticleDOI
Recent Trends and Perspectives in Electrochemical Water Splitting with an Emphasis on Sulfide, Selenide, and Phosphide Catalysts of Fe, Co, and Ni: A Review
Sengeni Anantharaj,Sivasankara Rao Ede,Kuppan Sakthikumar,Kannimuthu Karthick,Soumyaranjan Mishra,Subrata Kundu,Subrata Kundu +6 more
TL;DR: In this article, the hydrogen (H2) and oxygen (O2) fuel cell is the one with zero carbon emission and water as the only byproduct, which is essential to ensure higher life cycle and less decay in cell efficiency.