Oxygen reduction reaction electrocatalytic activity of tilted pt nanorod arrays fabricated by glancing angle deposition

ABSTRACTIn this work, we investigated the electrocatalytic oxygen reduction reaction (ORR) activity of vertically aligned, single-layer, carbon-free, and single crystal Pt nanorod arrays utilizing cyclic voltammetry (CV) and rotating-disk electrode (RDE) techniques. A glancing angle deposition (GLAD) technique was used to fabricate 200 nm long Pt nanorods, which corresponds to Pt loading of 0.16 mg/cm2, on glassy carbon (GC) electrode at a glancing angle of 85° as measured from the substrate normal. An electrode comprised of conventional carbon-supported Pt nanoparticles (Pt/C) was also prepared for comparison with the electrocatalytic ORR activity and stability of Pt nanorods. CV results showed that the Pt nanorod electrocatalyst exhibits a more positive oxide reduction peak potential compared to Pt/C, indicating that GLAD Pt nanorods are less oxophilic. In addition, a series of CV cycles in acidic electrolyte revealed that Pt nanorods are significantly more stable against electrochemically-active surface area loss than Pt/C. Moreover, room temperature RDE results demonstrated that GLAD Pt nanorods exhibit higher area-specific ORR activity than Pt/C. The enhanced electrocatalytic ORR activity of Pt nanorods is attributed to their larger crystallite size, single-crystal property, and the dominance of (110) crystal planes on the large surface area nanorods sidewalls, which has been found to be the most active plane for ORR. However, the Pt nanorods showed lower mass specific activity than the Pt/C electrocatalyst due to the large diameter of the Pt nanorods.

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Structure and Electrocatalytic Activity of Carbon-Supported Pt−Ni Alloy Nanoparticles Toward the Oxygen Reduction Reaction

The Journal of Physical Chemistry B ◽

10.1021/jp049034+ ◽

2004 ◽

Vol 108 (30) ◽

pp. 11024-11034 ◽

Cited By ~ 239

Author(s):

Hui Yang ◽

Walter Vogel ◽

Claude Lamy ◽

Nicolás Alonso-Vante

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Electrocatalytic Activity ◽

Reduction Reaction ◽

Alloy Nanoparticles ◽

Ni Alloy

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Surface Structure Dependent Electrocatalytic Activity of Co3O4 Anchored on Graphene Sheets toward Oxygen Reduction Reaction

Scientific Reports ◽

10.1038/srep02300 ◽

2013 ◽

Vol 3 (1) ◽

Cited By ~ 204

Author(s):

Junwu Xiao ◽

Qin Kuang ◽

Shihe Yang ◽

Fei Xiao ◽

Shuai Wang ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Surface Structure ◽

Oxygen Reduction ◽

Electrocatalytic Activity ◽

Reduction Reaction ◽

Graphene Sheets

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Tailoring molecular architectures of Fe phthalocyanine on nanocarbon supports for high oxygen reduction performance

Journal of Materials Chemistry A ◽

10.1039/c5ta01400j ◽

2015 ◽

Vol 3 (18) ◽

pp. 10013-10019 ◽

Cited By ~ 39

Author(s):

Shiming Zhang ◽

Heyou Zhang ◽

Xing Hua ◽

Shengli Chen

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Alkaline Solution ◽

Electrocatalytic Activity ◽

Reduction Reaction ◽

High Oxygen ◽

Molecular Architectures

Tailored molecular architectures of FePc on nanocarbon supports from nanorods to uniform shells exhibit excellent electrocatalytic activity for the oxygen reduction reaction in alkaline solution.

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