Control of both particle and pore size in nanoporous palladium alloy powders

Jones, Christopher G.; Cappillino, Patrick J.; Stavila, Vitalie; Robinson, David B.

doi:10.1016/j.powtec.2014.07.008

Title: Control of both particle and pore size in nanoporous palladium alloy powders

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Abstract

Energy storage materials often involve chemical reactions with bulk solids. Porosity within the solids can enhance reaction rates. The porosity can be either within or between individual particles of the material. Greater control of the size and uniformity of both types of pore should lead to enhancements of charging and discharging rates in energy storage systems. Furthermore, to control both particle and pore size in nanoporous palladium (Pd)-based hydrogen storage materials, first we created uniformly sized copper particles of about 1 μm diameter by the reduction of copper sulfate with ascorbic acid. In turn, these were used as reducing agents for tetrachloropalladate in the presence of a block copolymer surfactant. The copper reductant particles are geometrically self-limiting, so the resulting Pd particles are of similar size. The surfactant induces formation of 10 nm-scale pores within the particles. Some residual copper is alloyed with the Pd, reducing hydrogen storage capacity; use of a more reactive Pd salt can mitigate this. The reaction is conveniently performed in gram-scale batches.

Authors:

Jones, Christopher G. ^[1]; Cappillino, Patrick J. ^[1]; Stavila, Vitalie ^[1]; Robinson, David B. ^[1]

Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Publication Date:: Tue Jul 15 00:00:00 EDT 2014

Research Org.:: Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1142038

Alternate Identifier(s):: OSTI ID: 1556536

Report Number(s):: SAND-2014-2856J
Journal ID: ISSN 0032-5910; PII: S0032591014006184

Grant/Contract Number:: AC04-94AL85000

Resource Type:: Accepted Manuscript

Journal Name:: Powder Technology

Additional Journal Information:: Journal Volume: 267; Journal Issue: C; Journal ID: ISSN 0032-5910

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE; 36 MATERIALS SCIENCE; mesoporous; monodisperse; uniform; hydride; microspheres; copper

Citation Formats


                    Jones, Christopher G., Cappillino, Patrick J., Stavila, Vitalie, and Robinson, David B. Control of both particle and pore size in nanoporous palladium alloy powders.  United States: N. p., 2014. 
Web.  doi:10.1016/j.powtec.2014.07.008.

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                    Jones, Christopher G., Cappillino, Patrick J., Stavila, Vitalie, & Robinson, David B. Control of both particle and pore size in nanoporous palladium alloy powders.  United States.  https://doi.org/10.1016/j.powtec.2014.07.008

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                    Jones, Christopher G., Cappillino, Patrick J., Stavila, Vitalie, and Robinson, David B. Tue .  
"Control of both particle and pore size in nanoporous palladium alloy powders".  United States.  https://doi.org/10.1016/j.powtec.2014.07.008.  https://www.osti.gov/servlets/purl/1142038.

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@article{osti_1142038,

  title        = {Control of both particle and pore size in nanoporous palladium alloy powders},

  author       = {Jones, Christopher G. and Cappillino, Patrick J. and Stavila, Vitalie and Robinson, David B.},

  abstractNote = {Energy storage materials often involve chemical reactions with bulk solids. Porosity within the solids can enhance reaction rates. The porosity can be either within or between individual particles of the material. Greater control of the size and uniformity of both types of pore should lead to enhancements of charging and discharging rates in energy storage systems. Furthermore, to control both particle and pore size in nanoporous palladium (Pd)-based hydrogen storage materials, first we created uniformly sized copper particles of about 1 μm diameter by the reduction of copper sulfate with ascorbic acid. In turn, these were used as reducing agents for tetrachloropalladate in the presence of a block copolymer surfactant. The copper reductant particles are geometrically self-limiting, so the resulting Pd particles are of similar size. The surfactant induces formation of 10 nm-scale pores within the particles. Some residual copper is alloyed with the Pd, reducing hydrogen storage capacity; use of a more reactive Pd salt can mitigate this. The reaction is conveniently performed in gram-scale batches.},

  doi          = {10.1016/j.powtec.2014.07.008},

  journal      = {Powder Technology},

  number       = C,

  volume       = 267,

  place        = {United States},

  year         = {Tue Jul 15 00:00:00 EDT 2014},

  month        = {Tue Jul 15 00:00:00 EDT 2014}

}

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