Papillae-like morphology of Ni/Ni(OH)<sub>2</sub> hybrid crystals by stepwise electrodeposition for synergistically improved HER

Liu, Yiheng; Wang, Jian‐Zhi; Tian, Qifeng; Liu, Manyu; Wang, Xianming; Li, Pan; Li, Wei; Cai, Ning; Chen, Weimin; Yu, Faquan

doi:10.1039/c9ce00304e

Cited by 25 publications

(14 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The O 1s spectra of the samples are displayed in Figure d; they are well deconvoluted into two oxygen-containing species. The peaks at 529.1 and 531.2 eV can be attributed to Ni–O–Ni and Ni–O–H bonds, respectively. , More importantly, the absence of Ni–O–Ni bonds and the higher intensity of the Ni–O–H bonds (compared to the bare NF sample) indicate that Ni(OH) 2 was formed in situ on the surface of NF during the activation process. All of these observations completely support the conclusion that as-obtained Ni(OH) 2 @NF has a core–shell structure, which is composed of a metallic Ni core and an ultrathin Ni(OH) 2 layer as a shell.…”

Section: Resultsmentioning

confidence: 96%

In Situ Growth of Porous Ultrathin Ni(OH)₂ Nanostructures on Nickel Foam: An Efficient and Durable Catalysts for Urea Electrolysis

Xia

Liao

Qing

et al. 2020

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Urea electrolysis is a potential energy-efficient hydrogen (H 2 ) production method that can simultaneously purify urea-rich wastewater. However, the lack of inexpensive and effective electrocatalysts for the urea oxidation reaction (UOR) hampers its widespread use. Herein, hierarchically porous and ultrathin Ni(OH) 2 nanostructures in situ grown onto nickel foam (Ni(OH) 2 @NF) are developed as efficient and durable electrocatalysts for UOR via a simple and cost-effective ultrasonic/heating-assisted activation strategy. The ultrathin Ni(OH) 2 nanostructures comprise highly active surfaces and rapid diffusion pathways for active species; meanwhile, the excellent electrical conductivity of the NF skeletons effectively improves the charge transfer of the catalyst. Consequently, this Ni(OH) 2 @NF electrode exhibits excellent urea catalytic activity (low oxidation potential of ∼1.35 V at 10 mA cm −2 ) and has remarkable operational stability (potential increase by only 0.22% after 40 h of durability testing) that is superior to most UOR catalysts. By employing the freestanding electrode as the anode and commercial Pt/C supported on NF as the cathode, this two-electrode urea electrolysis cell exhibited a current density of 50 mA cm −2 at a low cell voltage (1.45 V, 250 mV below a urea-free counterpart) with a robust durability (>40 h). This work provides a valuable insight for designing scalable and high-performance UOR electrocatalysts, which are promising for utilization in energy-efficient H 2 production.

show abstract

Section: Resultsmentioning

confidence: 96%

In Situ Growth of Porous Ultrathin Ni(OH)₂ Nanostructures on Nickel Foam: An Efficient and Durable Catalysts for Urea Electrolysis

Xia

Liao

Qing

et al. 2020

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…Thus, Ni/Ni(OH) 2 displayed an overpotential of only 53 mV when the cathodic current density was 10 mA cm −2 in alkaline condition. [ 74 ]…”

Section: Recent Progressmentioning

confidence: 99%

“…Thus, Ni/Ni(OH) 2 displayed an overpotential of only 53 mV when the cathodic current density was 10 mA cm À2 in alkaline condition. [74] Another appealing strategy is the logical design of Ni nanolayered double hydroxides (LDHs). Ni-based LDHs have the advantages of simple processing, low synthesis cost, and favorable stability.…”

Section: Nickel-based Hydroxidementioning

confidence: 99%

Applications of Nickel‐Based Electrocatalysts for Hydrogen Evolution Reaction

Huo

Jin

Jiang

et al. 2022

Adv Energy and Sustain Res

View full text Add to dashboard Cite

The desire to exploit clean and sustainable energy sources with high gravimetric energy density has greatly inspired the exploration of hydrogen energy as an affordable alternative to fossil energy. Electrocatalytic water splitting is an efficient method for the low‐cost production of pure H2, but the use of platinum (Pt)‐like active electrocatalysts for the hydrogen evolution reaction (HER) remains necessary. In attempts to replace high‐value, scarce Pt catalysts, nickel‐based materials are being developed, as earth‐abundant HER electrocatalysts. Recently, a number of advanced nickel (Ni)‐based catalysts have been developed by rational synthesis strategies, including morphology control, structure tailoring, and interface engineering, significantly improving the HER performance. This review summarizes recent achievements in the application of Ni‐based HER electrocatalysts and demonstrates the advantages of each category in enhancing the HER performance. The current progress in the theory of water evolution and various modern techniques for characterizing catalysts are also reviewed, along with the rational design of Ni‐based nanostructure catalysts. Finally, the challenges in the practical applications of Ni‐based HER catalysts are highlighted.

show abstract

“…Faqua Yu's group synthesized catalysts on a Nickel foam substrate by a simple two‐step electrodeposition . Nanoarrays were formed in the first electrodeposition and the coarsening of the nanoarrays occurred on the surface of the catalysts during the second electrodeposition.…”

Section: Self‐supported Her Catalystmentioning

confidence: 99%

Current Status of Self‐Supported Catalysts for Robust and Efficient Water Splitting for Commercial Electrolyzer

et al. 2019

View full text Add to dashboard Cite

The development of cost effective and high-performance electrocatalyst is challenging but essential for realizing industrial hydrogen production by electolyzer. Electrocatalysts for water splitting must have active catalytic performance as well as high stability in strong alkaline or acidic media to be used in commercial elecrolyzer. Transition metal based electrocatalysts are considered as highly promising candidates due to their excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance and stability with low materials cost. Recently, binder free self-supported electrocatalysts based on transition metals have emerged as state-ofthe-art catalytic electrodes due to their high activity and robustness. These properties are attributed to lack of catalyst powder aggregation and a strong synergetic effect between the electrode surface and catalyst. In this mini review, recent development in self-supported electrocatalysts for OER, HER and also bifunctional OER & HER are reviewed in terms of superior activity and robust stability. Material design strategies, structural and compositional properties, and catalytic performance of recently reported self-supported electrocatalysts are summarized. Finally, overview of recent studies, challenges and prospects related to self-supported electrocatalysts are discussed.

show abstract

Papillae-like morphology of Ni/Ni(OH)₂ hybrid crystals by stepwise electrodeposition for synergistically improved HER

Abstract: The stepwise electrodeposition of Ni/Ni(OH)2 dual composition resulted in 3D hierarchical nanoarrays with a papillae-like hybrid crystal structure.

Cited by 25 publications

References 43 publications

In Situ Growth of Porous Ultrathin Ni(OH)₂ Nanostructures on Nickel Foam: An Efficient and Durable Catalysts for Urea Electrolysis

In Situ Growth of Porous Ultrathin Ni(OH)₂ Nanostructures on Nickel Foam: An Efficient and Durable Catalysts for Urea Electrolysis

Applications of Nickel‐Based Electrocatalysts for Hydrogen Evolution Reaction

Current Status of Self‐Supported Catalysts for Robust and Efficient Water Splitting for Commercial Electrolyzer

Contact Info

Product

Resources

About

Papillae-like morphology of Ni/Ni(OH)2 hybrid crystals by stepwise electrodeposition for synergistically improved HER

Abstract: The stepwise electrodeposition of Ni/Ni(OH)2 dual composition resulted in 3D hierarchical nanoarrays with a papillae-like hybrid crystal structure.

Cited by 25 publications

References 43 publications

In Situ Growth of Porous Ultrathin Ni(OH)2 Nanostructures on Nickel Foam: An Efficient and Durable Catalysts for Urea Electrolysis

In Situ Growth of Porous Ultrathin Ni(OH)2 Nanostructures on Nickel Foam: An Efficient and Durable Catalysts for Urea Electrolysis

Applications of Nickel‐Based Electrocatalysts for Hydrogen Evolution Reaction

Current Status of Self‐Supported Catalysts for Robust and Efficient Water Splitting for Commercial Electrolyzer

Contact Info

Product

Resources

About

Papillae-like morphology of Ni/Ni(OH)₂ hybrid crystals by stepwise electrodeposition for synergistically improved HER

In Situ Growth of Porous Ultrathin Ni(OH)₂ Nanostructures on Nickel Foam: An Efficient and Durable Catalysts for Urea Electrolysis

In Situ Growth of Porous Ultrathin Ni(OH)₂ Nanostructures on Nickel Foam: An Efficient and Durable Catalysts for Urea Electrolysis