PdCuAu ternary alloy membranes: Hydrogen permeation properties in the presence of H2S

Tarditi, Ana María; Imhoff, Carolina Guadalupe; Braun, Fernando; Miller, James B.; Gellman, Andrew J.; Cornaglia, Laura María

doi:10.1016/j.memsci.2014.12.030

Cited by 36 publications

(20 citation statements)

References 26 publications

(46 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The commercial product are available soon owing to the significant advances in the technology using mostly perovskites . Hydrogen can also be produced by a hydrogen‐selective membrane reactor (MR), with which high efficiency, cost reductions and flexibility of operation can be achieved …”

Section: Extended Applicationssupporting

confidence: 67%

Perovskite as a Cathode Material: A Review of its Role in Solid‐Oxide Fuel Cell Technology

et al. 2016

View full text Add to dashboard Cite

Solid oxide fuel cells (SOFCs) are characterized by low pollution, and are therefore the best alternative both for distributed energy sources and large‐scale integration. Fuel flexibility, including hydrocarbons, is the main advantage of SOFCs. For the successful introduction of SOFC technology to the market, reduced temperature operation at 600–800 °C is an essential factor. One of the important issues for the reduced temperature operation is to get rid of stability issues while maintaining a certain level of performance. Therefore, the development of alternative materials such as perovskite cathodes is essential to create not only practically acceptable performance, but also to ensure the highly reliable and stable operation of the resulting SOFCs. This review provides a critical and comprehensive survey on the perovskite materials for SOFC cathodes and suggests effective and stable alternatives for the realiable operation of SOFCs.

show abstract

Section: Extended Applicationssupporting

confidence: 67%

Perovskite as a Cathode Material: A Review of its Role in Solid‐Oxide Fuel Cell Technology

et al. 2016

View full text Add to dashboard Cite

show abstract

“…In agreement with the XRD results, sulfur was not detected in the bulk of H 2 S‐exposed PdCuAu samples by EDX. A summary of our results compared with those reported in the literature is presented in Table . Note that our results are consistent with the previous reports.…”

Section: Resultsmentioning

confidence: 78%

“…The presence of excess Cu atoms at the top surface, where H 2 S first interacts with the alloy, may contribute to the alloy's resistance to corrosion. We tested the hydrogen permeability and H 2 S tolerance of selected PdCuAu ternary alloy membranes synthesized on top of porous stainless steel disks . Upon exposure to 100 ppm H 2 S/H 2 at 400 °C for 24 h, all PdCuAu membranes experienced flux reductions of ~55%, followed by recovery to ~80% of the initial hydrogen flux upon reintroduction of pure hydrogen at 400 °C.…”

Section: Resultsmentioning

confidence: 99%

Surface composition of PdCuAu ternary alloys: a combined LEIS and XPS study

Tarditi

Imhoff

Miller

et al. 2015

Surface & Interface Analysis

Self Cite

View full text Add to dashboard Cite

PdCuAu ternary alloy samples with different composition were synthesized on top of ZrO 2 -modified porous stainless steel disks by the sequential electroless deposition technique. The structure, morphology and bulk composition of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy and energy dispersive X-ray spectroscopy (EDX). Complete alloy formation with a pure fcc phase for the Pd 71 Cu 26 Au 3 , Pd 70 Cu 25 Au 5 and Pd 67 Cu 24 Au 9 samples and a bcc structure for the Pd 62 Cu 36 Au 2 and Pd 60 Cu 37 Au 3 samples were obtained upon annealing at 500°C for 120 h as revealed by XRD. A combination of low-energy ion scattering (LEIS) and X-ray photoelectron spectroscopy (XPS) was used to investigate the surface properties of the PdCuAu alloys. XPS results confirmed alloy formation under the annealing conditions. XPS analysis also revealed that the near-surface regions of the alloys became enriched in Pd with respect to the bulk composition determined by EDX. In contrast, LEIS and angle-resolved XPS analyses showed that the top-most surface layers in all samples were copper-rich compared with the bulk composition. This high Cu surface concentration could impart resistance to bulk sulfide formation to the PdCuAu alloy membranes.

show abstract

“…However, this option is only possible in case of using metals with analogous properties that can be reduced in similar conditions, i.e., palladium and silver with comparable bath compositions and identical reducing agents. However, kinetics of the reduction process can be different for each component and, consequently, it is not easy to define the bath conditions to achieve a desired alloy composition [ 28 , 74 , 200 , 201 ].…”

Section: Pd-alloy Membranesmentioning

confidence: 99%

Review of Supported Pd-Based Membranes Preparation by Electroless Plating for Ultra-Pure Hydrogen Production

et al. 2018

View full text Add to dashboard Cite

In the last years, hydrogen has been considered as a promising energy vector for the oncoming modification of the current energy sector, mainly based on fossil fuels. Hydrogen can be produced from water with no significant pollutant emissions but in the nearest future its production from different hydrocarbon raw materials by thermochemical processes seems to be more feasible. In any case, a mixture of gaseous compounds containing hydrogen is produced, so a further purification step is needed to purify the hydrogen up to required levels accordingly to the final application, i.e., PEM fuel cells. In this mean, membrane technology is one of the available separation options, providing an efficient solution at reasonable cost. Particularly, dense palladium-based membranes have been proposed as an ideal chance in hydrogen purification due to the nearly complete hydrogen selectivity (ideally 100%), high thermal stability and mechanical resistance. Moreover, these membranes can be used in a membrane reactor, offering the possibility to combine both the chemical reaction for hydrogen production and the purification step in a unique device. There are many papers in the literature regarding the preparation of Pd-based membranes, trying to improve the properties of these materials in terms of permeability, thermal and mechanical resistance, poisoning and cost-efficiency. In this review, the most relevant advances in the preparation of supported Pd-based membranes for hydrogen production in recent years are presented. The work is mainly focused in the incorporation of the hydrogen selective layer (palladium or palladium-based alloy) by the electroless plating, since it is one of the most promising alternatives for a real industrial application of these membranes. The information is organized in different sections including: (i) a general introduction; (ii) raw commercial and modified membrane supports; (iii) metal deposition insights by electroless-plating; (iv) trends in preparation of Pd-based alloys, and, finally; (v) some essential concluding remarks in addition to futures perspectives.

show abstract

PdCuAu ternary alloy membranes: Hydrogen permeation properties in the presence of H2S

Cited by 36 publications

References 26 publications

Perovskite as a Cathode Material: A Review of its Role in Solid‐Oxide Fuel Cell Technology

Perovskite as a Cathode Material: A Review of its Role in Solid‐Oxide Fuel Cell Technology

Surface composition of PdCuAu ternary alloys: a combined LEIS and XPS study

Review of Supported Pd-Based Membranes Preparation by Electroless Plating for Ultra-Pure Hydrogen Production

Contact Info

Product

Resources

About