Ir-Doped Co(OH)<sub>2</sub> nanosheets as an efficient electrocatalyst for the oxygen evolution reaction

Yuan, Guoqing; Bai, Jie; Zhou, Tianning; Gong, Yaqiong

doi:10.1039/d2dt01366e

Cited by 9 publications

(4 citation statements)

References 63 publications

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“…At present, the rational design of advanced HER electrocatalysts should consider the two points of the dissociation of water molecules and the H* adsorption energy. Nowadays, the precious metal doping strategy has been widely applied in constructing excellent electrocatalysts in water splitting [ 33 , 34 , 35 ], which can form the optimized catalyst sites with the best free energy profile, thus leading to an ultrahigh mass activity based on precious metals.…”

Section: Heteroatom Doping Strategymentioning

confidence: 99%

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Bao

Liu

et al. 2023

Molecules

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Water splitting technology is an efficient approach to produce hydrogen (H2) as an energy carrier, which can address the problems of environmental deterioration and energy shortage well, as well as establishment of a clean and sustainable hydrogen economy powered by renewable energy sources due to the green reaction of H2 with O2. The efficiency of H2 production by water splitting technology is intimately related with the reactions on the electrode. Nowadays, the efficient electrocatalysts in water splitting reactions are the precious metal-based materials, i.e., Pt/C, RuO2, and IrO2. Ni (Co, Fe)-based layered double hydroxides (LDH) two-dimensional (2D) materials are the typical non-precious metal-based materials in water splitting with their advantages including low cost, excellent electrocatalytic performance, and simple preparation methods. They exhibit great potential for the substitution of precious metal-based materials. This review summarizes the recent progress of Ni (Co, Fe)-based LDH 2D materials for water splitting, and mainly focuses on discussing and analyzing the different strategies for modifying LDH materials towards high electrocatalytic performance. We also discuss recent achievements, including their electronic structure, electrocatalytic performance, catalytic center, preparation process, and catalytic mechanism. Furthermore, the characterization progress in revealing the electronic structure and catalytic mechanism of LDH is highlighted in this review. Finally, we put forward some future perspectives relating to design and explore advanced LDH catalysts in water splitting.

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Section: Heteroatom Doping Strategymentioning

confidence: 99%

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Bao

Liu

et al. 2023

Molecules

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show abstract

“…At present, rational design of advanced HER electrocatalysts should consider from two points of the dissociation of water molecules and H* adsorption energy. Nowadays, precious metal doping strategy has been widely applied in constructing excellent electrocatalysts in water splitting [33][34][35], which can form the optimized catalysts sites with a best free energy profile, thus leading to an ultrahigh mass activity-based on precious metals.…”

Section: Precious Metal Dopingmentioning

confidence: 99%

Recent Advances of Modified Ni (Co, Fe)-based LDH 2D Materials for Water Splitting

Li¹,

Bao²,

Liu³

et al. 2023

Preprint

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Water splitting technology is an efficient approach to generate hydrogen (H2) energy, which can well address the problems of environmental deterioration and energy shortage, as well as establishment of a clean and sustainable hydrogen economy powered by renewable energy sources due to the green reaction of H2 with O2. While the efficiency of H2 production by water splitting technology is intimately related with the reactions on electrode. Nowadays, the efficient electrocatalysts in water splitting reactions are the precious metal-based materials, i.e., Pt/C, RuO2 and IrO2. Ni (Co, Fe)-based layered double hydroxides (LDH) 2D materials are the typical non-precious metal-based materials in water splitting with advantages of low cost, excellent electrocatalytic performance and simple preparation methods, which exhibits a great potential for the substitution for precious metal-based materials. This review summarizes the recent progress of Ni (Co, Fe)-based LDH 2D materials for water splitting, which mainly focuses on discussing and analyzing the different strategies to modify LDH materials towards high electrocatalytic performance. We also discuss the recent achievements including their electronic structure, electrocatalytic performance, catalytic center, preparation process and catalytic mechanism. Furthermore, the characterization progress in revealing electronic structure and catalytic mechanism of LDH is highlighted in this review. Finally, we put forward some future perspectives related to design and explore advanced LDH catalysts in water splitting.

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“…In contrast, doping of very small or ultralow amount of noble metals, such as Ru and Ir into TM-based oxides, hydroxides, and LDHs also evidenced as an effective modulation strategy to enhance OER activity. [138][139][140][141][142] The advantages of ultralow noble metal doping include adsorption energy optimization of OER intermediates on the electrocatalyst surface through electronic structure modulation, acting as additional active sites, increase in electrical conductivity, and active surface areas by inducing lattice distortion. [143][144][145] These factors highly facilitate the OER kinetics and decrease the overpotential.…”

Section: Cycles and 23 Hmentioning

confidence: 99%

Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

Karmakar

Chavan

Jeong

et al. 2022

Adv Energy and Sustain Res

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To date, conventional fossil fuels have been considered the main energy source for modern civilization. [1] The nonrenewable nature and continuous depletion of fossil fuels and the increasing CO 2 emission levels necessitate the development of cost-effective renewable energy conversion/storage systems. [2][3][4][5] In this context, hydrogen, as a fuel, is considered an important alternative to many conventional energy resources owing to its several advantages, such as facile energy storage/carrier, high energy density, and zero-emission upon combustion. [6][7][8] Hydrogen has applications in heat generation, [9] refining processes in industry, [10] and provides electricity in stationary and transport/ vehicle. [11] Hydrogen can be manufactured using a variety of methods, such as hightemperature steam reforming, water electrolysis, solar water splitting-thermolysis, and biomass conversion. [12] Among these methods, steam reforming is the preferred method; it fulfills %96% of global hydrogen demand. [13,14] However, this process requires high temperatures (700-1100 °C) and fossil fuels/natural hydrocarbons, and it is accompanied by greenhouse gas (CO 2 ) emissions. [15][16][17] Among various hydrogen production technologies, water electrolysis can be considered a major contributor to the production of ultrapure hydrogen (>99.9%); moreover, water electrolysis is environmentally benign. In addition, the electrolysis of water in alkaline media is a highly cost-effective, sustainable, and industrially viable method for hydrogen production. [18] However, efficient hydrogen production through water electrolysis is limited by the high overpotential and sluggish kinetics of the anodic oxygen evolution reaction (OER) and the cathodic hydrogen evolution reaction (HER). [11] The OER involves four-electron transfer pathways under acidic and alkaline conditions. Further, OER is associated with many other energy conversion and storage processes/devices, such as solar fuel production [2] and metal-air batteries. [19] The OER is a four-electron transfer process and has a relatively higher overpotential than the HER and a complex reaction mechanism; hence, OER can be considered the rate-determining step (RDS) for hydrogen production through water electrolysis. [20] Furthermore, the OER has unusually low rate constants and high

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Ir-Doped Co(OH)₂ nanosheets as an efficient electrocatalyst for the oxygen evolution reaction

Abstract: In recent years, Co-based metal-organic frameworks (Co-MOFs) have received significant research interest because of their large specific surface area, high porosity, tunable structure and topological flexibility. However, the comparatively weak...

Cited by 9 publications

References 63 publications

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Recent Advances of Modified Ni (Co, Fe)-based LDH 2D Materials for Water Splitting

Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

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Ir-Doped Co(OH)2 nanosheets as an efficient electrocatalyst for the oxygen evolution reaction

Abstract: In recent years, Co-based metal-organic frameworks (Co-MOFs) have received significant research interest because of their large specific surface area, high porosity, tunable structure and topological flexibility. However, the comparatively weak...

Cited by 9 publications

References 63 publications

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Recent Advances of Modified Ni (Co, Fe)-based LDH 2D Materials for Water Splitting

Mixed Transition Metal Carbonate Hydroxide‐Based Nanostructured Electrocatalysts for Alkaline Oxygen Evolution: Status and Perspectives

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Ir-Doped Co(OH)₂ nanosheets as an efficient electrocatalyst for the oxygen evolution reaction