Journal ArticleDOI
Operando Unraveling of the Structural and Chemical Stability of P-Substituted CoSe2 Electrocatalysts toward Hydrogen and Oxygen Evolution Reactions in Alkaline Electrolyte
Yanping Zhu,Hsiao Chien Chen,Hsiao Chien Chen,Chia-Shuo Hsu,Ting Sheng Lin,Chia Jui Chang,Sung Chun Chang,Li Duan Tsai,Hao Ming Chen +8 more
TLDR
In this article, a series of operando measurements, including in situ X-ray absorption spectroscopy, liquid phase transmission electron microscopy, and in situ Raman spectrograms, were conducted to unravel in real time the structural and chemical stability of P-substituted CoSe2 electrocatalysts under both hydrogen and oxygen evolution reactions (HER and OER) in an alkaline electrolyte.Abstract:
The question of whether the metal chalcogenides (phosphides) that have been acknowledged to be efficient materials for bifunctional electrocatalysts really perform as the active species or just “pre-catalysts” has been debated Herein, a series of operando measurements, including in situ X-ray absorption spectroscopy, liquid-phase transmission electron microscopy, and in situ Raman spectroscopy, were conducted to unravel in real time the structural and chemical stability of P-substituted CoSe2 electrocatalysts under both hydrogen and oxygen evolution reactions (HER and OER, respectively) in an alkaline electrolyte It can be conclusively revealed that, in an alkaline electrolyte, the P-substituted CoSe2 electrocatalyst was acting as the “pre-catalyst” rather than the real reactive species The introduction of phosphorus is speculated to generate more vacancies or defects around Co cations in the initial CoSe2 and considerably facilitates the structural transformation into the “real reactive species”, suchread more
Citations
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Journal ArticleDOI
Recent advances in transition metal-based electrocatalysts for alkaline hydrogen evolution
TL;DR: In this paper, a review of transition metal-based catalysts for the hydrogen evolution reaction (HER) is presented, and the challenges for the future development of novel catalysts are also analyzed.
Journal ArticleDOI
Recent advances in activating surface reconstruction for the high-efficiency oxygen evolution reaction.
TL;DR: A comprehensive review of the surface reconstruction of transition metal-based OER catalysts including oxides, non-oxides, hydroxides and alloys can be found in this article.
Journal ArticleDOI
In Situ/Operando Studies for Designing Next-generation Electrocatalysts
TL;DR: It has been widely acknowledged that most of the electrocatalysts would undergo a structural reconstruction during the water splitting as well as carbon dioxide (CO2) reduction reactions as discussed by the authors.
Journal ArticleDOI
Stability challenges of electrocatalytic oxygen evolution reaction: From mechanistic understanding to reactor design
TL;DR: In this article, the authors provide catalysts and reactor design principles for overcoming OER stability challenges and focus more attention from the field on the great importance of oxygen evolution reaction (OER) stability as well as future large scale electrocatalysis applications.
Journal ArticleDOI
Operando time-resolved X-ray absorption spectroscopy reveals the chemical nature enabling highly selective CO 2 reduction
Sheng Chih Lin,Chun Chih Chang,Shih Yun Chiu,Hsiao Tien Pai,Tzu Yu Liao,Chia-Shuo Hsu,Wei Hung Chiang,Ming Kang Tsai,Hao Ming Chen +8 more
TL;DR: An operando seconds-resolved X-ray absorption spectroscopy is developed to uncover the chemical state evolution of working catalysts in a carbon dioxide electroreduction process and offer understandings of the fundamental chemical states and insights to the establishment of selective CO2RR.
References
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Journal ArticleDOI
Electrocatalysis for the oxygen evolution reaction: recent development and future perspectives
TL;DR: This review acquaints some materials for performing OER activity, in which the metal oxide materials build the basis of OER mechanism while non-oxide materials exhibit greatly promising performance toward overall water-splitting.
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.
PatentDOI
Metal-free bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions
TL;DR: A mesoporous carbon foam co-doped with nitrogen and phosphorus that has a large surface area and good electrocatalytic properties for both ORR and OER and is tested as an air electrode for primary and rechargeable Zn-air batteries.
Journal ArticleDOI
Enhancing Hydrogen Evolution Activity in Water Splitting by Tailoring Li+-Ni(OH)2-Pt Interfaces
Ram Subbaraman,Dusan Tripkovic,Dusan Strmcnik,Kee-Chul Chang,Masanobu Uchimura,Arvydas P. Paulikas,Vojislav R. Stamenkovic,Nenad M. Markovic +7 more
TL;DR: It is found that a controlled arrangement of nanometer-scale Ni(OH)2 clusters on platinum electrode surfaces manifests a factor of 8 activity increase in catalyzing the hydrogen evolution reaction relative to state-of-the-art metal and metal-oxide catalysts.
Journal ArticleDOI
CoSe2 Nanoparticles Grown on Carbon Fiber Paper: An Efficient and Stable Electrocatalyst for Hydrogen Evolution Reaction
TL;DR: A two-step reaction for preparing three-dimensional electrodes composed of CoSe2 nanoparticles grown on carbon fiber paper shows excellent catalytic activity for a hydrogen evolution reaction in an acidic electrolyte, and offers an attractive catalyst material for large-scale water-splitting technology.