Electrocatalysis: Co‐doping Strategy for Developing Perovskite Oxides as Highly Efficient Electrocatalysts for Oxygen Evolution Reaction (Adv. Sci. 2/2016)

Xu, Xiaomin; Su, Chao; Zhou, Wei; Zhu, Yinlong; Chen, Yubo; Shao, Zongping

doi:10.1002/advs.201670010

Cited by 11 publications

(15 citation statements)

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“…utilized a co‐doping strategy to synthesize BaCo 0.9− x Fe x Sn 0.1 O 3− δ with a transformation from a hexagonal phase to cubic symmetry ( Figure a–c) that showed a considerable increase in OER activity. [ 61 ] Zhu et al. reported a Nb‐doped bulk perovskite oxide SrNb 0.1 Co 0.7 Fe 0.2 O 3− δ based on the parent perovskite oxide SrCo 0.8 Fe 0.2 O 3− δ (a cubic structure with a Pm

\overset{true¯}{3}

m space group) (Figure 6d).…”

Section: High‐valence Metal Sitesmentioning

confidence: 99%

Section: High‐valence Metal Sitesmentioning

confidence: 99%

“…[ 9e,57,65b,69 ] Doping is a facile and effective strategy for promoting the catalytic activity (simple doping, great deal) due to finely modulating electronic properties, which results in the fine‐tuning of the adsorption energies of reaction intermediates. [ 21a,57,61,70 ]…”

Section: High‐valence Metal Sitesmentioning

confidence: 99%

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Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Sun

Song

et al. 2021

Adv Funct Materials

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239

162

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Electrochemical water splitting is a critical energy conversion process for producing clean and sustainable hydrogen; this process relies on low‐cost, highly active, and durable oxygen evolution reaction/hydrogen evolution reaction electrocatalysts. Metal cations (including transition metal and noble metal cations), particularly high‐valence metal cations that show high catalytic activity and can serve as the main active sites in electrochemical processes, have received special attention for developing advanced electrocatalysts. In this review, heterogenous electrocatalyst design strategies based on high‐valence metal sites are presented, and associated materials designed for water splitting are summarized. In the discussion, emphasis is given to high‐valence metal sites combined with the modulation of the phase/electronic/defect structure and strategies of performance improvement. Specifically, the importance of using advanced in situ and operando techniques to track the real high‐valence metal‐based active sites during the electrochemical process is highlighted. Remaining challenges and future research directions are also proposed. It is expected that this comprehensive discussion of electrocatalysts containing high‐valence metal sites can be instructive to further explore advanced electrocatalysts for water splitting and other energy‐related reactions.

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\overset{true¯}{3}

m space group) (Figure 6d).…”

Section: High‐valence Metal Sitesmentioning

confidence: 99%

Section: High‐valence Metal Sitesmentioning

confidence: 99%

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Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Sun

Song

et al. 2021

Adv Funct Materials

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239

162

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“…Many noble metal‐based, noble metal‐free, or even metal‐free complexes and materials have been discovered as HER and OER catalysts . Among them, noble metal‐based systems generally showed superior performance.…”

Section: Electrocatalytic Hydrogen and Oxygen Evolution Reactionsmentioning

confidence: 99%

Solar‐to‐Hydrogen Energy Conversion Based on Water Splitting

Zhang

Cao

2017

Advanced Energy Materials

493

250

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Artificial photosynthesis provides a blueprint to harvest solar energy to sustain the future energy demands. Solar‐driven water splitting, converting solar energy into hydrogen energy, is the prototype of photosynthesis. Various systems have been designed and evaluated to understand the reaction pathways and/or to meet the requirements of potential applications. In solar‐to‐hydrogen conversion, electrocatalytic hydrogen and oxygen evolution reactions are key research areas that are meaningful both theoretically and practically. To utilize hydrogen energy, fuel cell technology has been extensively investigated because of its high efficiency in releasing chemical energy. In this review, general concepts of the photosynthesis in green plants are discussed, different strategies for the light‐driven water splitting proposed in laboratories are introduced, the progress of electrocatalytic hydrogen and oxygen evolution reactions are reviewed, and finally, the reactions in hydrogen fuel cells are briefly discussed. Overall, the mass and energy circulation in the solar‐hydrogen‐electricity circle are delineated. The authors conclude that attention from scientists and engineers of relevant research areas is still highly needed to eliminate the wide disparity between the aspirations and realities of artificial photosynthesis.

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“…At present, noble metal–based materials for OER, such as ruthenium oxides, are still ranking the highest level. [ 16,17 ] Meanwhile, nonnoble metal compounds, for instance, transition metal oxides, [ 18–21 ] perovskite, [ 22,23 ] hydroxide, [ 24,25 ] nitrides, [ 26,27 ] borates, [ 28,29 ] and so on, have also captured extensive interests for preparing high‐efficient OER catalysts. Among them, the metal fluoride, mostly literature reported for supercapacitor, lithium ion battery, etc., [ 30–33 ] is rarely wielded in the field of water electrolysis, possibly due to the chemical/electrochemical instability of fluoride ions and the weak bond between the metal ions and fluoride ions.…”

Section: Introductionmentioning

confidence: 99%

Atomic Doping and Anion Reconstructed CoF₂ Electrocatalyst for Oxygen Evolution Reaction

Dong

et al. 2020

Adv Materials Inter

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limits the availability of new types of energy. [4] Accordingly, hydrogen has been considered as a promising energy carrier to storage renewable energy through electrocatalytic water splitting. Great progress has been achieved to improve the electrolytic efficiency of the hydrogen evolution reaction (HER) [5,6] and oxygen evolution reaction (OER). [7,8] For HER, many nonnoble metal compounds have replaced traditional noble metal catalysts and have been utilized with satisfying catalytic efficiency. [9][10][11][12] Concerning to the fourelectron OER process, its reaction rates determine the overall catalytic efficiency of the water electrolysis. [13][14][15] Therefore, it is of particular importance to develop OER catalysts with high activity and durability.At present, noble metal-based materials for OER, such as ruthenium oxides, are still ranking the highest level. [16,17] Meanwhile, nonnoble metal compounds, for instance, transition metal oxides, [18][19][20][21] perovskite, [22,23] hydroxide, [24,25] nitrides, [26,27] borates, [28,29] and so on, have also captured extensive interests for preparing high-efficient OER catalysts. Among them, the metal fluoride, mostly literature reported for supercapacitor, lithium ion battery, etc., [30][31][32][33] is rarely wielded in the field of water electrolysis, possibly due to the chemical/electrochemical instability of fluoride ions and the weak bond between the metal ions and fluoride ions. Actually, fluoride ions can be easily replaced by other anions during the testing process, which is beneficial to optimize the catalytic activity by anionic reconstruction. [34] Consequently, metal fluoride is one of the most promising candidates to enhance the OER activity. Cobalt-based compounds, high-efficient catalytic activity for OER, have been considered one of the most prospective nonnoble catalysts in alkaline conditions for their low cost, rich source, and excellent corrosion resistance. [35][36][37][38][39] In addition, atomic doping or substitution can further improve its electrocatalytic performance by introducing more defects and catalytic active sites. [40][41][42] Herein, we took Fe-doped CoF 2 as research object to explore its electrocatalytic performance and catalytic mechanism in water splitting. Pristine CoF 2 was fabricated through a facile two-step reaction of hydrothermal method and chemical vapor deposition fluorination process. Furthermore, Fe 3+ was introduced into the resultant by adding iron agent into the precursor solution. The obtained Fe-doped CoF 2 revealed better electrocatalytic performance compared to pristine CoF 2 in 1 m Electrocatalytic water splitting is one of the most promising green solutions for large-scale hydrogen production, which has developed rapidly in recent years. The slow reaction rate of oxygen evolution reaction (OER) has become the bottleneck to improve the electrocatalytic efficiency. Herein, Fe-doped CoF 2 nanowire arrays on 3D nickel foam are prepared by two steps of hydrothermal reaction and fluorination process. The increa...

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Electrocatalysis: Co‐doping Strategy for Developing Perovskite Oxides as Highly Efficient Electrocatalysts for Oxygen Evolution Reaction (Adv. Sci. 2/2016)

Cited by 11 publications

References 0 publications

Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Solar‐to‐Hydrogen Energy Conversion Based on Water Splitting

Atomic Doping and Anion Reconstructed CoF₂ Electrocatalyst for Oxygen Evolution Reaction

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Electrocatalysis: Co‐doping Strategy for Developing Perovskite Oxides as Highly Efficient Electrocatalysts for Oxygen Evolution Reaction (Adv. Sci. 2/2016)

Cited by 11 publications

References 0 publications

Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Designing High‐Valence Metal Sites for Electrochemical Water Splitting

Solar‐to‐Hydrogen Energy Conversion Based on Water Splitting

Atomic Doping and Anion Reconstructed CoF2 Electrocatalyst for Oxygen Evolution Reaction

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Atomic Doping and Anion Reconstructed CoF₂ Electrocatalyst for Oxygen Evolution Reaction