Benefits and limitations of Pt nanoparticles supported on highly porous antimony-doped tin dioxide aerogel as alternative cathode material for proton-exchange membrane fuel cells

Cognard, Gwenn; Ozouf, Guillaume; Beauger, Christian; Berthomé, G.; Riassetto, David; Dubau, Laëtitia; Chattot, Raphaël; Chatenet, Marian; Maillard, Frédéric

doi:10.1016/j.apcatb.2016.08.010

Cited by 79 publications

(75 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The positive shift of the surface oxide reduction peak observed for Pt/ATO-EG relative to that of Pt/HSAC suggests that larger Pt nanoparticles are present on Pt/ATO-EG, in agreement with TEM observations and the dependence of this peak position on the Pt nanoparticle size. 52 Looking at Figure 6a, 26,30,38 This is usually accounted for by considering a synergy between the Pt nanoparticles and the metal oxide support (SMSI) or preferential crystalline orientation of Pt nanoparticles and particle size effects although none of these phenomena were identified in this study.…”

Section: Resultsmentioning

confidence: 92%

“…Such an arrangement was not observed after similar deposition on carbon XC72. 30 Considering the morphology described above (filament) it is not relevant to estimate the Pt nanoparticle size from the specific surface area data (the Pt nanoparticles are far from being spherical). XRD analysis confirmed the presence of Pt nanocrystallites.…”

Section: Resultsmentioning

confidence: 99%

“…Because of the smaller Pt specific surface area, both materials performed identically in terms of ORR mass activity, in agreement with our former findings. 30 However, due to the pronounced detachment of Pt nanoparticles from the HSAC support, the electrocatalytic advantage of Pt/ATO-EG was enhanced after the AST. After 5,000 potential cycles between 1.0 and 1.5 V vs. RHE, the Pt/ATO-EG electrocatalyst achieved 1.5-fold and 3-fold enhancement over the reference Pt/HSAC electrocatalyst, in specific and mass activity for the ORR, respectively.…”

Section: Initial Performance Of the Different Pt/ato Aerogel Electrocmentioning

confidence: 99%

“…These ATO aerogel-based electrocatalysts have been characterized and their electrocatalytic activity toward oxygen reduction reaction evaluated in previous works. 29,30 In this study, we focus on the impact of the Pt reduction route and that of thermal post-treatments on the physico-chemical and electrochemical properties of the obtained Pt/ATO electrocatalysts. The results show that the deposition process affects the Pt nanoparticle size, the surface of exposed crystallographic facets, and their crystallinity.…”

mentioning

confidence: 99%

“…[21][22][23] Most of the dopant elements added to the SnO 2 matrix are known to inhibit particle growth and modify the material morphology. 21,24 Nb- [25][26][27][28] or Sb- 25,26,[29][30][31][32][33][34][35][36][37] doped SnO 2 materials have already been tested as catalyst support. Pt/SnO 2 -based electrocatalysts have demonstrated high mass activity for the ORR, sometimes surpassing that of Pt/C electrocatalysts.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

Ozouf

Cognard

Maillard

et al. 2018

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Tin dioxide is a promising catalyst support to improve the stability of proton-exchange membrane fuel cells (PEMFC) cathodes at high voltages. However, optimizing the catalytic activity for the oxygen reduction reaction (ORR) of tin dioxide based electrocatalyst still remains challenging. In this study, an antimony doped tin dioxide (ATO) aerogel featuring suitable physico-chemical properties for application at a PEMFC cathode was successfully synthetized. Two platinum nanoparticles deposition methods were tested and compared. One is a chemical reduction route (using ethylene glycol, EG), the other uses ultraviolet (UV) irradiation followed by different thermal post-treatments. Electrocatalysts structure and morphology were analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM) experiments. The highest ORR mass activity measured in liquid electrolyte at 25 • C was obtained for Pt/ATO from EG method (32 A g Pt −1 versus 27 A g Pt −1 for a reference Pt/HSAC 40 wt%). Pt/ATO turned out to be more stable than Pt/HSAC during an accelerated stress test composed of 5,000 potential cycles between 1.0 and 1.5 V vs. RHE at 80 • C.

show abstract

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Initial Performance Of the Different Pt/ato Aerogel Electrocmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

Ozouf

Cognard

Maillard

et al. 2018

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

Efficient OER Catalyst with Low Ir Volume Density Obtained by Homogeneous Deposition of Iridium Oxide Nanoparticles on Macroporous Antimony‐Doped Tin Oxide Support

Böhm

Beetz

Schuster

et al. 2019

Adv Funct Materials

114

105

View full text Add to dashboard Cite

A multistep synthesis procedure for the homogeneous coating of a complex porous conductive oxide with small Ir nanoparticles is introduced to obtain a highly active electrocatalyst for water oxidation. At first, inverse opal macroporous Sb doped SnO 2 (ATO) microparticles with defined pore size, composition, and open-porous morphology are synthesized that reach a conductivity of ≈3.6 S cm −1 and are further used as catalyst support. ATO-supported iridium catalysts with a controlled amount of active material are prepared by solvothermal reduction of an IrO x colloid in the presence of the porous ATO particles, whereby homogeneous coating of the complete outer and inner surface of the particles with nanodispersed metallic Ir is achieved. Thermal oxidation leads to the formation of ATO-supported IrO 2 nanoparticles with a void volume fraction of ≈89% calculated for catalyst thin films based on scanning transmission electron microscope tomography data and microparticle size distribution. A remarkably low Ir bulk density of ≈0.08 g cm −3 for this supported oxide catalyst architecture with 25 wt% Ir is determined. This highly efficient oxygen evolution reaction catalyst reaches a current density of 63 A g Ir −1 at an overpotential of 300 mV versus reversible hydrogen electrode, significantly exceeding a commercial TiO 2 -supported IrO 2 reference catalyst under the same measurement conditions.

show abstract

Promoting Electrocatalysis upon Aerogels

2018

View full text Add to dashboard Cite

Electrocatalysis plays a prominent role in renewable energy conversion and storage, enabling a number of sustainable processes for future technologies. There are generally three strategies to improve the efficiency (or activity) of the electrocatalysts: i) increasing the intrinsic activity of the catalyst itself, ii) improving the exposure of active sites, and iii) accelerating mass transfer during catalysis (both reactants and products). These strategies are not mutually exclusive and can ideally be addressed simultaneously, leading to the largest improvements in activity. Aerogels, as featured by large surface area, high porosity, and self‐supportability, provide a platform that matches all the aforementioned criteria for the design of efficient electrocatalysts. The field of aerogel synthesis has seen much progress in recent years, mainly thanks to the rapid development of nanotechnology. Employing precursors with different properties enables the resulting aerogel with targeted catalytic properties and improved performances. Here, the design strategies of aerogel catalysts are demonstrated, and their performance for several electrochemical reactions is reviewed. The common principles that govern electrocatalysis are further discussed for each category of reactions, thus serving as a guide to the development of future aerogel electrocatalysts.

show abstract

Benefits and limitations of Pt nanoparticles supported on highly porous antimony-doped tin dioxide aerogel as alternative cathode material for proton-exchange membrane fuel cells

Cited by 79 publications

References 69 publications

Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

Efficient OER Catalyst with Low Ir Volume Density Obtained by Homogeneous Deposition of Iridium Oxide Nanoparticles on Macroporous Antimony‐Doped Tin Oxide Support

Promoting Electrocatalysis upon Aerogels

Contact Info

Product

Resources

About

Benefits and limitations of Pt nanoparticles supported on highly porous antimony-doped tin dioxide aerogel as alternative cathode material for proton-exchange membrane fuel cells

Cited by 79 publications

References 69 publications

Sb-Doped SnO2Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

Sb-Doped SnO2Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

Efficient OER Catalyst with Low Ir Volume Density Obtained by Homogeneous Deposition of Iridium Oxide Nanoparticles on Macroporous Antimony‐Doped Tin Oxide Support

Promoting Electrocatalysis upon Aerogels

Contact Info

Product

Resources

About

Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability

Sb-Doped SnO₂Aerogels Based Catalysts for Proton Exchange Membrane Fuel Cells: Pt Deposition Routes, Electrocatalytic Activity and Durability