Dense films formed during Ti anodization in NH4F electrolyte: Evidence against the field-assisted dissolution reactions of fluoride ions

Zhou, Qinyi; Tian, Mengmeng; Zhang, Ying; Dan, Yuxin; Tang, Fengrui; Zhang, Jianpeng; Zhu, Jun; Zhu, Xufei

doi:10.1016/j.elecom.2020.106663

Cited by 102 publications

(65 citation statements)

References 46 publications

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“…The formation of TNTAs in this study can also explain based on the oxygen bubble mold and the ionic current and electronic current model [31][32][33]. The high the conductivity of ethylene glycol electrolyte [34], and at high voltage (about 60 V) lead to high values of both the initial electronic current (Equation ( 1)) at the beginning of anodization due to growth of the compact oxide layer in ethylene glycol electrolyte and ionic current chemical which contributes to the formation of the anion contaminated layer. So with the existence of the compact layer oxide and anion contaminated layer by F -, the electronic current is rapidly produced and accompanied with oxygen bubbles evolution.…”

Section: Morphological and Crystalline Phase Characterizationmentioning

confidence: 56%

Double layer lanthanide –Pt/TiO₂ nanotube arrays electrode as a cost-highly efficient electrocatalyst for hydrogen evolution in acid media

Emran

Alanazi

2021

Journal of Experimental Nanoscience

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Self-organized anodic double layer TiO 2 nanotube arrays (TNTAs) were sensitized by an electrochemical anodization process on a Ti sheet with a two-step anodization method. The prepared sample, followed by hydrothermal treatment with Nd(NO 3 ) 3 and/or Gd(NO 3 ) 3 and/or PtCl 4 solution at 180 C for 2 h, produced Nd-Pt-TNTAs, Gd-Pt-TNTAs, Nd-Gd-Pt-TNTAs and Pt-TNTAs. The morphological and structural properties were studied by SEM, XRD and Raman spectra techniques. The hydrogen evolution reaction (HER) performance on Lanthanides-Pt-TNTAs was investigated using the Tafel linear polarization technique. The calculated values of the activation energy are in good agreement with the trend in catalytic activity. The excellent performance of doped TNTAs with low activation energy (E a ) is due to the formation of an excitation energy level below the conduction band of TiO 2 from the binding of electrons with oxygen vacancies decreasing the excitation energy resulting in robust electrocatalytic activity. The very low value of E a for Nd-Gd-Pt-TNTAs (2.02 kJ/mol) compared to other electrochemical catalysts used for hydrogen evolution reactions containing titanium nanotubes was achieved for the first time. This makes the Lanthanides -Pt-TNTAs prepared in the present work optimal catalysts for electrodes and promising for applications in fuel cells or as water splitting materials. HIGHLIGHTSSynthesis of self-organized anodic double layer TiO 2 nanotube arrays (TNTAs) on a Ti sheet with a two-step anodization method. Nd, Gd, Pt were deposited on anodic TNTAs arrays by hydrothermal method. The HER mechanisms on Lanthanides-Pt-TNTAs in acidic media has been discussed. The order of catalytic activity based on the values of activation energy was Nd-Gd-Pt-TNTAs > Gd-Pt-TNTAs > Nd-Pt-TNTAs > Pt-TNTAs > undoped TNTAs.

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Section: Morphological and Crystalline Phase Characterizationmentioning

confidence: 56%

Double layer lanthanide –Pt/TiO₂ nanotube arrays electrode as a cost-highly efficient electrocatalyst for hydrogen evolution in acid media

Emran

Alanazi

2021

Journal of Experimental Nanoscience

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“…The new oxide grows at both the metal/oxide interface and the electrolyte/oxide interface. 20 At this stage, the J total is almost equal to the ionic current. the oxide film which is near the electrolyte will become an anion contaminated layer and the one which is near the Ti substrate will become a barrier oxide layer.…”

Section: Nanoscale Advances Accepted Manuscriptmentioning

confidence: 98%

“…19 Although these reactions have been repeatedly cited to explain the mechanism of nanopore formation, it has never been reported that any of these dissolution reactions actually exist. [9][10][11][12]20 On the contrary, in recent years there have been a number of articles denying the field-assisted dissolution reaction. [20][21][22][23] Skeldon et al 21 demonstrated that the acid dissolves alumina weakly, 21 which could not sustain the growth of the pores.…”

Section: Introductionmentioning

confidence: 99%

Evidence of oxygen bubbles forming nanotube embryos in porous anodic oxides

Gong

et al. 2021

Nanoscale Adv.

Self Cite

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“…[40][41][42] For the battery-type electrode of LICs, the materials can be divided into three kinds according to their various Li + storage behavior: insertion-type of pre-lithiated carbonaceous materials (graphite, hard carbon, and soft carbon, etc. ), TiO 2 , [43][44] and LTO; [45] conversion-type of metal oxides and hydroxides materials (SnO 2 , [46][47] [48] Nb 2 O 5 , [49][50] CoO, [51] etc. ), and alloy-type metal or metallic compounds (Si, [23,52] Sn, [53][54] etc.).…”

Section: Introductionmentioning

confidence: 99%

Recent Advances on Carbon‐Based Materials for High Performance Lithium‐Ion Capacitors

Liu

Zhang

et al. 2021

Batteries & Supercaps

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Lithium‐ion capacitors (LICs) combining of lithium‐ion batteries (LIBs) and supercapacitors (SCs) with improved performance bridge the gap between these two devices, and have attracted huge attention in the field of high‐efficiency electrochemical energy storage. The behavior of electrode materials is essential for the realization of high energy and high output LICs devices. As the most widely utilized electrodes, carbon materials demonstrated their ability in LICs with fast charge storage and long life‐span. Here, an overview of carbon materials for advanced LICs applications is given. The advantages and shortcomings of carbon materials as electrodes are systematically analyzed with the purpose of disclosing their influence on LICs devices. In light of this analysis, the critical aspects are discussed, which should be dealt with in the future for the realization of desires high‐performance LICs devices.

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Dense films formed during Ti anodization in NH4F electrolyte: Evidence against the field-assisted dissolution reactions of fluoride ions

Cited by 102 publications

References 46 publications

Double layer lanthanide –Pt/TiO₂ nanotube arrays electrode as a cost-highly efficient electrocatalyst for hydrogen evolution in acid media

Double layer lanthanide –Pt/TiO₂ nanotube arrays electrode as a cost-highly efficient electrocatalyst for hydrogen evolution in acid media

Evidence of oxygen bubbles forming nanotube embryos in porous anodic oxides

Recent Advances on Carbon‐Based Materials for High Performance Lithium‐Ion Capacitors

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Dense films formed during Ti anodization in NH4F electrolyte: Evidence against the field-assisted dissolution reactions of fluoride ions

Cited by 102 publications

References 46 publications

Double layer lanthanide –Pt/TiO2 nanotube arrays electrode as a cost-highly efficient electrocatalyst for hydrogen evolution in acid media

Double layer lanthanide –Pt/TiO2 nanotube arrays electrode as a cost-highly efficient electrocatalyst for hydrogen evolution in acid media

Evidence of oxygen bubbles forming nanotube embryos in porous anodic oxides

Recent Advances on Carbon‐Based Materials for High Performance Lithium‐Ion Capacitors

Contact Info

Product

Resources

About

Double layer lanthanide –Pt/TiO₂ nanotube arrays electrode as a cost-highly efficient electrocatalyst for hydrogen evolution in acid media

Double layer lanthanide –Pt/TiO₂ nanotube arrays electrode as a cost-highly efficient electrocatalyst for hydrogen evolution in acid media