Electrocatalytic Oxygen Evolution Reaction in Acidic Conditions: Recent Progress and Perspectives

Pu, Zonghua; Liu, Tingting; Zhang, Gaixia; Ranganathan, Hariprasad; Chen, Zhangxin; Sun, Shuhui

doi:10.1002/cssc.202101461

Cited by 43 publications

(32 citation statements)

References 237 publications

(329 reference statements)

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“…The OER is a multi-state reaction process, and the reaction kinetic is extremely sluggish, requiring a higher potential (1.23 V or higher) for the reaction, significantly reducing the energy conversion efficiency of the entire water decomposition [ 33 , 37 , 38 ]. Multistep synergistic and non-cooperative proton-electron transfer mechanisms may be used in the precise catalytic stages of OER [ 29 , 30 ].…”

Section: Progress In Catalysts For the Oermentioning

confidence: 99%

Recent Advances Regarding Precious Metal-Based Electrocatalysts for Acidic Water Splitting

Peng¹,

Liao

Ye³

et al. 2022

Nanomaterials

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Electrochemical water splitting has wide applicability in preparing high-density green energy. The Proton exchange membrane (PEM) water electrolysis system is a promising technique for the generation of hydrogen due to its high electrolytic efficiency, safety and reliability, compactness, and quick response to renewable energy sources. However, the instability of catalysts for electrochemical water splitting under operating conditions limits their practical applications. Until now, only precious metal-based materials have met the requirements for rigorous long-term stability and high catalytic activity under acid conditions. In this review, the recent progress made in this regard is presented and analyzed to clarify the role of precious metals in the promotion of the electrolytic decomposition of water. Reducing precious metal loading, enhancing catalytic activity, and improving catalytic lifetime are crucial directions for developing a new generation of PEM water electrolysis catalysts. A summary of the synthesis of high-performance catalysts based on precious metals and an analysis of the factors affecting catalytic performance were derived from a recent investigation. Finally, we present the remaining challenges and future perspectives as guidelines for practical use.

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Section: Progress In Catalysts For the Oermentioning

confidence: 99%

Recent Advances Regarding Precious Metal-Based Electrocatalysts for Acidic Water Splitting

Peng¹,

Liao

Ye³

et al. 2022

Nanomaterials

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“…Water electrolysis is one of the most promising ways to store renewable energy. [1][2][3][4][5] The four-electron oxygen evolution reaction (OER) at the anode is characterized by more sluggish kinetics than the two-electron hydrogen evolution reaction (HER) at the cathode. To split water electrochemically, costeffective electrocatalysts for both half-cell reactions are urgently needed.…”

Section: Introductionmentioning

confidence: 99%

On the Role of Interfacial Water Dynamics for Electrochemical Stability of RuO₂ and IrO₂

2022

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Based on the coincident onsets of oxygen evolution reaction (OER) and metal dissolution for many metal-oxide catalysts it was suggested that OER triggers dissolution. It is believed that both processes share common intermediates, yet exact mechanistic details remain largely unknown. For example, there is still no clear understanding as to why rutile IrO 2 exhibits such an exquisite stability among water-splitting electrocatalysts. Here, we employ density functional theory calculations to analyze interactions between water and the (110) surface of rutile RuO 2 and IrO 2 as a response to oxygen evolution involving lattice oxygen species. We observe that these oxides display qualitatively different interfacial behavior that should have important implications for their electrochemical stability. Specifically, it is found that IrO 2 (110) becomes further stabilized under OER conditions due to the tendency to form highly stable low oxidation state Ir(III) species. In contrast, Ru species at RuO 2 (110) are prone to facile reoxidation by solution water. This should facilitate the formation of high Ru oxidation state intermediates (> IV) accelerating surface restructuring and metal dissolution.

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“…[13] In comparison to alkaline electrochemical water splitting, acidic electrochemical water splitting has the advantages of high hydrogen evolution rate and less by-products. [14][15][16][17] In addition, Iridiumbased catalysts are one kind of the best anodic electrocatalysts for OER in acidic media due to its catalytic activity and stability. [18,19] In order to promote the performance of iridium-based catalysts in water splitting, different strategies have been developed, such as heteroatom incorporation, [20][21][22][23] strain engineering and single atomic.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the development of an efficient OER catalyst is comparatively essential to improve the overall energy conversion efficiency of water splitting, especially in acidic electrolytes [13] . In comparison to alkaline electrochemical water splitting, acidic electrochemical water splitting has the advantages of high hydrogen evolution rate and less by‐products [14–17] . In addition, Iridium‐based catalysts are one kind of the best anodic electrocatalysts for OER in acidic media due to its catalytic activity and stability [18,19] …”

Section: Introductionmentioning

confidence: 99%

Lattice Strain Enhances the Activity of Ir−IrO₂/C for Acidic Oxygen Evolution Reaction

Wang

Zhu

et al. 2022

ChemElectroChem

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Lattice strain plays a critical role in regulating the electronic structure and improving the performance of catalysts. Here, Ir−IrO2/C catalysts with different iridium content are obtained by annealing Ir/C in air. The growth of IrO2 on Ir nanoparticles can form a core–shell structure and introduces strain at their interface. The local compressive strain on Ir nanoparticles is 7.2 % in the optimal Ir−IrO2/C sample with Ir content of 14.3 % (Ir−IrO2/C‐3), which regulates the adsorption energy of intermediates and improves the catalytical performance of oxygen evolution reaction (OER). The overpotential of Ir−IrO2/C‐3 at 10 mA ⋅ cm−2 is 264 mV in acidic electrolyte, 35 mV lower than that of Ir−IrO2/C with no lattice strain. Ir−IrO2/C‐3 also exhibits the highest mass activity of 1304 A ⋅ gIr−1 at 1.55 V vs. RHE, which is higher than those of commercial catalysts. Furthermore, the activity of Ir−IrO2/C‐3 can maintain 42 h with the potential increase of only 18 mV at 10 mA ⋅ cm−2, proving that the lattice strain can also effectively improve the electrochemical stability.

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Electrocatalytic Oxygen Evolution Reaction in Acidic Conditions: Recent Progress and Perspectives

Cited by 43 publications

References 237 publications

Recent Advances Regarding Precious Metal-Based Electrocatalysts for Acidic Water Splitting

Recent Advances Regarding Precious Metal-Based Electrocatalysts for Acidic Water Splitting

On the Role of Interfacial Water Dynamics for Electrochemical Stability of RuO₂ and IrO₂

Lattice Strain Enhances the Activity of Ir−IrO₂/C for Acidic Oxygen Evolution Reaction

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Electrocatalytic Oxygen Evolution Reaction in Acidic Conditions: Recent Progress and Perspectives

Cited by 43 publications

References 237 publications

Recent Advances Regarding Precious Metal-Based Electrocatalysts for Acidic Water Splitting

Recent Advances Regarding Precious Metal-Based Electrocatalysts for Acidic Water Splitting

On the Role of Interfacial Water Dynamics for Electrochemical Stability of RuO2 and IrO2

Lattice Strain Enhances the Activity of Ir−IrO2/C for Acidic Oxygen Evolution Reaction

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Product

Resources

About

On the Role of Interfacial Water Dynamics for Electrochemical Stability of RuO₂ and IrO₂

Lattice Strain Enhances the Activity of Ir−IrO₂/C for Acidic Oxygen Evolution Reaction