IrCo Nanodendrite as an Efficient Bifunctional Electrocatalyst for Overall Water Splitting under Acidic Conditions

Fu, Luhong; Zeng, Xiangli; Cheng, Gongzhen; Luo, Wei

doi:10.1021/acsami.8b08717

Cited by 83 publications

(64 citation statements)

References 30 publications

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“…Introducing other low-cost components have been demonstrated to be an effective route to dilute noble metals (Ru, Ir) content. [50,69,87,89,114,[168][169][170][171][172][173][174][175] Although diluted, the trace amount of noble metals still plays major roles in catalyzing OER under acidic condition. The introduced components can have electron interactions with noble metals, and this leads to a notable effect on the charge distribution, lattice parameter, and orbital state.…”

Section: Combining With Low-cost Elementsmentioning

confidence: 99%

“…By introducing the same elements, the OER activity of catalysts may not be consistent, because of the various synthesis conditions and surface structures. Different fabrication methods, such as galvanic replacement, [174] thermal annealing, [100,103] and acid leaching, [103] can generate different morphologies and structural states, such as ultrasmall particles, [174] nanodendrites, [170] and nanorods. [178]…”

Section: Combining With Low-cost Elementsmentioning

confidence: 99%

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Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

et al. 2021

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a-d) Reproduced with permission. [61] Copyright 2017, Springer Nature. e) Possible OER routes on Zn 0.2 Co 0.8 O 2 with LOM mechanism. [59] Copyright 2019, Springer Nature. f) Scheme representing the proposed OER mechanism on the surface of La 2 LiIrO 6 in acid. Reproduced with permission. [66] Copyright 2016, Nature Publishing Group. g) The mechanism suggested for amorphous iridium oxide and leached perovskites with participation of activated oxygen in the reaction forming oxygen vacancies. Reproduced with permission. [51] Copyright 2018, Springer Nature.

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Section: Combining With Low-cost Elementsmentioning

confidence: 99%

Section: Combining With Low-cost Elementsmentioning

confidence: 99%

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

et al. 2021

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“…From 1970s, the electrocatalysts in acidic environment are mainly thin films based on metal oxides, such as MoO 2 , WO 2 , ReO 2 , OsO 2 , RuO 2 , and IrO 2 . [ 36–38 ] At present, the catalytic performance and stability of catalysts in acid have made great progress, including precious metal, [ 39–42 ] oxides, [ 43,44 ] perovskite, [ 45–47 ] nonprecious metal, [ 27,48 ] and metal‐free compounds. [ 49 ]…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Lei

Wang

Zhao

et al. 2020

Advanced Energy Materials

200

161

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Hydrogen is a clean and renewable energy carrier for powering future transportation and other applications. Water electrolysis is a promising option for hydrogen production from renewable resources such as wind and solar energy. To date, tremendous efforts have been devoted to the development of electrocatalysts and membranes for water electrolysis technology. In principle, water electrolysis in acidic media has several advantages over that in alkaline media, including favorable reaction kinetics, easy product separation, and low operating pressure. However, acidic water electrolysis poses higher requirements for the catalysts, especially the ones for the oxygen evolution reaction. It is a grand challenge to develop highly active, durable, and cost‐effective catalysts to replace precious metal catalysts for acidic water oxidation. In this article, an overview is presented of the latest developments in design and synthesis of electrocatalysts for acidic water oxidation, emphasizing new strategies for achieving high electrocatalytic activity while maintaining excellent durability at low cost. In particular, the reaction pathways and intermediates are discussed in detail to gain deeper insight into the oxygen evolution reaction mechanism, which is vital to rational design of more efficient electrocatalysts. Further, the remaining scientific challenges and possible strategies to overcome them are outlined, together with perspectives for future‐generation electrocatalysts that exploit nanoscale materials for water electrolysis.

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“…Iridium-cobalt alloy based nanostructured catalysts exhibited excellent HER activity in acid electrolyte [15] owing to the strong electronic interaction and alloying effect of Ir and Co at the atomic level [15].…”

Section: The Her On Iridium In Acid Solutionsmentioning

confidence: 99%

Sub-monolayers of iridium electrodeposited on Ti2AlC substrate as catalysts for hydrogen evolution reaction in sulfuric acid solution

Elezović¹,

Krstajić-Pajić²,

Jović³

2020

Zaštita materijala

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The hydrogen evolution reaction (HER) was investigated at sub-monolayers of iridium electrodeposited on Ti 2 AlC substrate. The lowest amount of electrodeposited iridium was 3 closepacked (111) monolayers (3 ML), while the highest one was 22 ML (3, 5, 10, 15 and 22 ML). The lowest and the highest amounts of iridium were electrodeposited by linear sweep voltammetry (LSV), while the other three samples were electrodeposited by controlled potential coulometry, from the solution containing 1 mM, or 3 mM K 3 IrCl 6 + 0.5 M Na 2 SO 4 (pH 6.2) at 70 o C. The HER was investigated by polarization and electrochemical impedance spectroscopy (EIS) measurements. Polarization curves for iridium sub-monolayers equal, or higher than 6 ML showed low Tafel slope of-14 to-16 mV dec-1 up to about-0.1 A cm-2 , while at higher current densities the Tafel slopes increased, varying between-40 and-72 mV dec-1. The highest value of exchange current density (j o) was obtained for 6 ML of electrodeposited iridium, being-27.89 A g-1. The overpotential at j =-0.3 A cm-2 could be determined for samples containing 15 ML and 22 ML of iridium, being 82 mV.

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IrCo Nanodendrite as an Efficient Bifunctional Electrocatalyst for Overall Water Splitting under Acidic Conditions

Cited by 83 publications

References 30 publications

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

Recent Development of Oxygen Evolution Electrocatalysts in Acidic Environment

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Sub-monolayers of iridium electrodeposited on Ti2AlC substrate as catalysts for hydrogen evolution reaction in sulfuric acid solution

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