Novel nanorod Ti0·7Ir0·3O2 prepared by facile hydrothermal process: A promising non-carbon support for Pt in PEMFCs

Nguyen, At Van; Huynh, Tai Thien; Pham, Hau Quoc; Phan, Vi Thuy Thi; Nguyen, Son Truong; Ho, Van Thi Thanh

doi:10.1016/j.ijhydene.2018.09.054

Cited by 22 publications

(14 citation statements)

References 38 publications

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“…The intensive peaks show that the anatase phase formed accounted for a larger proportion than the rutile phase did. This is consistent with the previous studies [27][28][29]. However, the anatase/rutile TiO 2 ratio gradually increased with the increase of doped iridium concentration.…”

Section: Materials Characteristicssupporting

confidence: 93%

“…The positive difference of Ir 4+ radius compared to Ti 4+ radius might result in crystallinity reduction, limiting the formation of rutile phase, because of this, the peaks of this phase decreased their intensity when the concentration of iridium increased. Moreover, it might due to the synthesis used being hydrothermal synthesis at 250 • C in 8 h. At this reaction condition, amorphous TiO 2 was completely transformed into anatase TiO 2 but not enough for the transformation from anatase phase to rutile phase [27][28][29]. The intensive peaks show that the anatase phase formed accounted for a larger proportion than the rutile phase did.…”

Section: Materials Characteristicsmentioning

confidence: 99%

“…Ti 1−x Ir x O 2 was prepared by one-step hydrothermal method without additional surfactants or stabilizers as described in other previous work [28,29]. The synthesis steps are illustrated in Figure 1.…”

Section: Synthesis Of Ir-doped Tio 2 Samplesmentioning

confidence: 99%

“…This photocatalyst was synthesized by the one-pot hydrothermal method without using any surfactant or subsequent heating. This method has been reported to help reduce the particle size and increased the surface area [27][28][29]. Furthermore, the experiments with different iridium ratios and conditions were also carried out to find the impact of the environment on photodegradation efficiency.…”

Section: Introductionmentioning

confidence: 99%

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A High-Performing Nanostructured Ir Doped-TiO2 for Efficient Photocatalytic Degradation of Gaseous Toluene

Ho¹,

Chau

Bui

et al. 2022

Inorganics

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TiO2-based photocatalysts still have some limitations such as large bandgap and low surface area, leading to low efficiency in the photocatalytic degradation of VOCs and limiting it to use in sunlight. Here we report that the nanostructured Ir-doped TiO2 as an efficient photocatalyst generates an excellent risk-reduction material of gaseous toluene. We have succeeded in developing a nanostructured Ir-doped TiO2 and initially found that excellent efficient photocatalytic VOC decomposition can be achieved in our materials The nanostructured Ir-doped TiO2 was synthesized by a one pot, low temperature hydrothermal process with different ratios of Ir doped into the TiO2. It exhibited a high surface area, uniformly spherical morphology of 10–15 nm. Its activity for the photocatalytic degradation of gaseous toluene exhibited up to 97.5% under UV light. This enhancement could be explained by iridium doping which created a high concentration oxygen vacancy and changed the recombination rate of the photogenerated charge carriers. More generally, our study indicates a strategic way to develop the novel nanostructured material for numerous applications.

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Section: Materials Characteristicssupporting

confidence: 93%

Section: Materials Characteristicsmentioning

confidence: 99%

Section: Synthesis Of Ir-doped Tio 2 Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A High-Performing Nanostructured Ir Doped-TiO2 for Efficient Photocatalytic Degradation of Gaseous Toluene

Ho¹,

Chau

Bui

et al. 2022

Inorganics

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“…In the prepared materials, the single‐crystal structure of the electrocatalyst exhibited a favorable bi‐functional electrocatalytic activity. Similarly, Nguyen et al [46] . also synthesized Ti 0.7 Ir 0.3 O 2 NRs by a facile hydrothermal method without the use of surfactant or stabilizers, and then 20 wt % Pt was loaded on the nanorods by chemical reduction to produce Pt/Ti 0.7 Ir 0.3 O 2 NRs with high catalytic activity.…”

Section: Synthesis Of One‐dimensional Electrocatalystsmentioning

confidence: 99%

A Review of One‐Dimensional Nanomaterials as Electrode Materials for Oxygen Reduction Reaction Electrocatalysis

et al. 2022

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In fuel cells, the generally low oxygen reduction reactions (ORR) rate at the cathode is a major factor limiting the overall performance of fuel cell, so the development of high‐performance, stable and inexpensive ORR electrocatalysts is a major researching direction. Nano‐electrocatalysts, especially one‐dimensional (1D) electrocatalysts, exhibit good catalytic behavior in fuel cell reactions due to their unique anisotropic structure, large specific surface area, high elasticity and excellent stability. To date, many advanced 1D electrocatalysts have been reported for optimizing the cathode ORR of fuel cells. Therefore, a comprehensive review of the structural design of 1D nano‐electrocatalysts and a systematic analysis of their enhanced performance still need further summarized and concluded. In this review, we firstly introduce the main synthetic methods of 1D electrocatalysts, and then discuss the recent advances and advantages of different structured 1D electrocatalysts involving nanofibers, nanotubes, nanorods, nanochains, nanowires, nanobelts, nanoneedles, nanowhiskers, and coaxial nanocables. In addition, we also introduce 1D electrocatalysts while highlighting advanced strategies and preparation methods for these different structured 1D electrocatalysts to improve ORR performance. Finally, we prospect the future development of 1D ORR electrocatalysts.

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Milestones of Electrocatalyst Development for Direct Alcohol Fuel Cells

Nguyen

Pham

Huynh³

et al. 2023

Advanced Sustainable Systems

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With increasing energy demands and environmental issues, renewable energy‐related conversion systems have gained significant attention as a potential substitute for traditional fossil fuel‐based energy technologies. First introduced by S.W.Grove in 1838, fuel cells have been extensively developed into many different types, and direct alcohol fuel cells (DAFCs) are of interest as a potential power source because of their large power density, quick start, simplicity, and nearly zero emission. However, the high cost and poor catalytic efficiency of current catalysts are primary barriers to commercializing DAFCs. Designing advanced nanocatalysts for both anode and cathode electrodes is of crucial importance for practical DAFC development; however, a brief evaluation of current progress in electrocatalyst development for the alcohol oxidation reaction (AOR) and oxygen reduction reaction (ORR) is still very little. Herein, recent advances in fuel cell catalysts, mainly focusing on several most active areas (i.e., Pt‐ and Pt‐free‐based catalysts, metal‐free carbon, carbon‐based nonprecious metal composites) are concisely summarized. Also, challenges and prospects for DAFCs are highlighted to supply a comprehensive view for further designing high‐performance DAFC catalysts.

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Novel nanorod Ti0·7Ir0·3O2 prepared by facile hydrothermal process: A promising non-carbon support for Pt in PEMFCs

Cited by 22 publications

References 38 publications

A High-Performing Nanostructured Ir Doped-TiO2 for Efficient Photocatalytic Degradation of Gaseous Toluene

A High-Performing Nanostructured Ir Doped-TiO2 for Efficient Photocatalytic Degradation of Gaseous Toluene

A Review of One‐Dimensional Nanomaterials as Electrode Materials for Oxygen Reduction Reaction Electrocatalysis

Milestones of Electrocatalyst Development for Direct Alcohol Fuel Cells

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