Ni optimizes Ir reaction pathway through IrNi alloy synergistic effect to improve overall water splitting efficiency

Zhou, Zhang-Hong; Li, Wei-Hang; Zhang, Zhen; Zhao, Xiaochong; Cao, Wei; Huang, Qingsong

doi:10.1016/j.ijhydene.2022.11.178

Cited by 15 publications

(1 citation statement)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…24,121 However, the scarcity and high price of Ir hinder its application on a large scale. Thus, to minimize the Ir content in OER catalysts, various types of Ir-based composite materials with earth-abundant metals such as mixed metal oxides, 127 oxyhydroxides, 128 alloys, 129–131 and LDH 132 have been prepared. Some NiIr composite materials of NiIr x /CNT hybrid 131 and monolayer NiIr LDH 132 showed higher OER performances compared to their Ir counterparts.…”

Section: Bimetallic Nickel Catalystsmentioning

confidence: 99%

Prominent development of Ni-based oxygen-evolving electrocatalysts for water splitting

Tsubonouchi,

Zahran,

Chandra

et al. 2024

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

Section: Bimetallic Nickel Catalystsmentioning

confidence: 99%

Prominent development of Ni-based oxygen-evolving electrocatalysts for water splitting

Tsubonouchi,

Zahran,

Chandra

et al. 2024

Catal. Sci. Technol.

View full text Add to dashboard Cite

show abstract

NiIr Nanowire Assembles as an Efficient Electrocatalyst Towards Oxygen Evolution Reaction in Both Acid and Alkaline Media

Zhang,

Wang,

et al. 2024

Chemistry An Asian Journal

View full text Add to dashboard Cite

Oxygen evolution reaction (OER) is the rate‐limiting step in water electrolysis due to its sluggish kinetic, and it is challenging to develop an OER catalyst that could work efficiently in both acid and alkaline environment. Herein, NiIr nanowire assembles (NAs) with unique nanoflower morphology were prepared by a facile hydrothermal method. As a result, the NiIr NAs exhibited superior OER activity in both acid and alkaline media. Specifically, in 0.1 M HClO4, NiIr NAs presented a superior electrocatalytic performance with a low overpotential of merely 242 mV at 10 mA cm‐2 and a Tafel slope of only 58.1 mV dec‐1, surpassing that of commercial IrO2 and pure Ir NAs. And it achieved a significantly higher mass activity of 148.40 A/g at ‐1.5 V versus RHE. In 1.0 M KOH, NiIr NAs has an overpotential of 291 mV at 10 mA cm‐2 and a Tafel slope of 42.1 mV dec‐1. Such remarkable activity makes the NiIr NAs among the best of recently reported representative Ir‐based OER electrocatalysts. Density functional theory (DFT) calculations confirmed alloying effect promotes surface bonding of NiIr with oxygen‐containing reactants, resulting in excellent catalytic properties.

show abstract

Scalable 2D Semiconductor‐Based van der Waals Heterostructure Interface with Built‐in Electric Field for Enhanced Electrochemical Water Splitting

Eom,

Cho,

Lee

et al. 2024

Small Structures

View full text Add to dashboard Cite

Electrochemical water splitting has received tremendous attention as an eco‐friendly approach to produce hydrogen. Noble metals and their oxides are commonly used as electrocatalysts to reduce activation energy barriers for hydrogen and oxygen evolution reactions in high‐performance electrodes, but their cost, scarcity, and limited stability hinder widespread adoption of electrochemical water splitting. Further advancements are therefore needed to reduce reliance on noble metals and improve the long‐term stability. Herein, solution‐processed 2D van der Waals (vdW) p–n heterostructures as an interfacial layer between catalysts and the electrode are introduced to enhance the catalytic performance. These heterostructures are formed by sequentially assembling electrochemically exfoliated black phosphorus and molybdenum disulfide nanosheets into electronic‐grade p‐ and n‐type semiconductor thin films, with the scalability extending across tens‐of‐centimeter scale areas. Benefiting from the charge distribution and built‐in electric field developed upon heterojunction formation, the vdW heterostructure interfacial layer increases both the catalytic activity and stability of commercial Pt/C and Ir/C catalysts compared to when these catalysts are directly loaded onto electrodes. Additionally, the vdW heterostructure also serves as a template for synthesizing nanostructured Pt and Ir catalysts through electrodeposition, further enhancing the catalytic performance in terms of mass activity and stability.

show abstract

Ni optimizes Ir reaction pathway through IrNi alloy synergistic effect to improve overall water splitting efficiency

Cited by 15 publications

References 47 publications

Prominent development of Ni-based oxygen-evolving electrocatalysts for water splitting

Prominent development of Ni-based oxygen-evolving electrocatalysts for water splitting

NiIr Nanowire Assembles as an Efficient Electrocatalyst Towards Oxygen Evolution Reaction in Both Acid and Alkaline Media

Scalable 2D Semiconductor‐Based van der Waals Heterostructure Interface with Built‐in Electric Field for Enhanced Electrochemical Water Splitting

Contact Info

Product

Resources

About