Platinum Coated Copper Nanowires and Platinum Nanotubes as Oxygen Reduction Electrocatalysts

Shaun M. Alia; Kurt Jensen; Christian Contreras; Fernando Garzon; Bryan Pivovar; Yushan Yan

doi:10.1021/cs300664g

Platinum Coated Copper Nanowires and Platinum Nanotubes as Oxygen Reduction Electrocatalysts

Shaun M. Alia, Kurt Jensen, Christian Contreras, Fernando Garzon, Bryan Pivovar, Yushan Yan

Chemistry and Nanoscience

Research output: Contribution to journal › Article › peer-review

99 Scopus Citations

Abstract

Platinum (Pt) coated copper (Cu) nanowires (Pt/CuNWs) are synthesized by the partial galvanic displacement of Cu nanowires (CuNWs) with a Pt loading of 18 wt %. Pt/CuNWs have an outer diameter of 100 nm, a length of 25-40 μm, and a theoretical Pt layer thickness of 2 nm. Cu templated Pt nanotubes (PtNTs (Cu)) with a wall thickness of 11 nm, an outer diameter of 100 nm, and a length of 5-20 μm are synthesized by the complete galvanic displacement of CuNWs. CuNWs are synthesized by the hydrazine reduction of Cu nitrate in sodium hydroxide. Oxygen reduction reaction (ORR) and durability experiments are conducted on Pt/CuNWs, PtNTs (Cu), silver templated PtNTs (Ag), and carbon supported Pt nanoparticles (Pt/C) to evaluate catalyst activity for use as proton exchange membrane fuel cell cathodes. The ORR area activities of Pt/CuNWs and PtNTs (Cu) are 1.501 and 1.506 mA cm_Pt^-2, respectively. Pt/CuNWs produce a dollar activity of 9.8 A $^-1 (dollar activity calculated from the DOE mass activity target for 2017-2020 of 0.44 A mg_PGM^-1). Durability testing of each catalyst shows improved retention of surface area and ORR activity in comparison to Pt/C.

Original language	American English
Pages (from-to)	358-362
Number of pages	5
Journal	ACS Catalysis
Volume	3
Issue number	3
DOIs	https://doi.org/10.1021/cs300664g https://doi.org/10.1021/cs300664g
State	Published - Mar 2013

NREL Publication Number

NREL/JA-5600-58440

Keywords

core shell catalysts
platinum nanotubes
proton exchange membrane fuel cells

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title = "Platinum Coated Copper Nanowires and Platinum Nanotubes as Oxygen Reduction Electrocatalysts",

abstract = "Platinum (Pt) coated copper (Cu) nanowires (Pt/CuNWs) are synthesized by the partial galvanic displacement of Cu nanowires (CuNWs) with a Pt loading of 18 wt %. Pt/CuNWs have an outer diameter of 100 nm, a length of 25-40 μm, and a theoretical Pt layer thickness of 2 nm. Cu templated Pt nanotubes (PtNTs (Cu)) with a wall thickness of 11 nm, an outer diameter of 100 nm, and a length of 5-20 μm are synthesized by the complete galvanic displacement of CuNWs. CuNWs are synthesized by the hydrazine reduction of Cu nitrate in sodium hydroxide. Oxygen reduction reaction (ORR) and durability experiments are conducted on Pt/CuNWs, PtNTs (Cu), silver templated PtNTs (Ag), and carbon supported Pt nanoparticles (Pt/C) to evaluate catalyst activity for use as proton exchange membrane fuel cell cathodes. The ORR area activities of Pt/CuNWs and PtNTs (Cu) are 1.501 and 1.506 mA cmPt-2, respectively. Pt/CuNWs produce a dollar activity of 9.8 A $-1 (dollar activity calculated from the DOE mass activity target for 2017-2020 of 0.44 A mgPGM-1). Durability testing of each catalyst shows improved retention of surface area and ORR activity in comparison to Pt/C.",

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AU - Alia, Shaun M.

AU - Jensen, Kurt

AU - Contreras, Christian

AU - Garzon, Fernando

AU - Pivovar, Bryan

AU - Yan, Yushan

PY - 2013/3

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N2 - Platinum (Pt) coated copper (Cu) nanowires (Pt/CuNWs) are synthesized by the partial galvanic displacement of Cu nanowires (CuNWs) with a Pt loading of 18 wt %. Pt/CuNWs have an outer diameter of 100 nm, a length of 25-40 μm, and a theoretical Pt layer thickness of 2 nm. Cu templated Pt nanotubes (PtNTs (Cu)) with a wall thickness of 11 nm, an outer diameter of 100 nm, and a length of 5-20 μm are synthesized by the complete galvanic displacement of CuNWs. CuNWs are synthesized by the hydrazine reduction of Cu nitrate in sodium hydroxide. Oxygen reduction reaction (ORR) and durability experiments are conducted on Pt/CuNWs, PtNTs (Cu), silver templated PtNTs (Ag), and carbon supported Pt nanoparticles (Pt/C) to evaluate catalyst activity for use as proton exchange membrane fuel cell cathodes. The ORR area activities of Pt/CuNWs and PtNTs (Cu) are 1.501 and 1.506 mA cmPt-2, respectively. Pt/CuNWs produce a dollar activity of 9.8 A $-1 (dollar activity calculated from the DOE mass activity target for 2017-2020 of 0.44 A mgPGM-1). Durability testing of each catalyst shows improved retention of surface area and ORR activity in comparison to Pt/C.

AB - Platinum (Pt) coated copper (Cu) nanowires (Pt/CuNWs) are synthesized by the partial galvanic displacement of Cu nanowires (CuNWs) with a Pt loading of 18 wt %. Pt/CuNWs have an outer diameter of 100 nm, a length of 25-40 μm, and a theoretical Pt layer thickness of 2 nm. Cu templated Pt nanotubes (PtNTs (Cu)) with a wall thickness of 11 nm, an outer diameter of 100 nm, and a length of 5-20 μm are synthesized by the complete galvanic displacement of CuNWs. CuNWs are synthesized by the hydrazine reduction of Cu nitrate in sodium hydroxide. Oxygen reduction reaction (ORR) and durability experiments are conducted on Pt/CuNWs, PtNTs (Cu), silver templated PtNTs (Ag), and carbon supported Pt nanoparticles (Pt/C) to evaluate catalyst activity for use as proton exchange membrane fuel cell cathodes. The ORR area activities of Pt/CuNWs and PtNTs (Cu) are 1.501 and 1.506 mA cmPt-2, respectively. Pt/CuNWs produce a dollar activity of 9.8 A $-1 (dollar activity calculated from the DOE mass activity target for 2017-2020 of 0.44 A mgPGM-1). Durability testing of each catalyst shows improved retention of surface area and ORR activity in comparison to Pt/C.

KW - core shell catalysts

KW - platinum nanotubes

KW - proton exchange membrane fuel cells

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Platinum Coated Copper Nanowires and Platinum Nanotubes as Oxygen Reduction Electrocatalysts

Abstract

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Keywords

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