Atomic layer deposition of platinum catalysts on nanowire surfaces for photoelectrochemical water reduction.
J Am Chem Soc
; 135(35): 12932-5, 2013 Sep 04.
Article
en En
| MEDLINE
| ID: mdl-23962091
ABSTRACT
The photocathodic hydrogen evolution reaction (HER) from p-type Si nanowire (NW) arrays was evaluated using platinum deposited by atomic layer deposition (ALD) as a HER cocatalyst. ALD of Pt on the NW surface led to a highly conformal coating of nanoparticles with sizes ranging from 0.5 to 3 nm, allowing for precise control of the Pt loading in deep submonolayer quantities. The catalytic performance was measured using as little as 1 cycle of Pt ALD, which corresponded to a surface mass loading of â¼10 ng/cm(2). The quantitative exploration of the lower limits of Pt cocatalyst loading reported here, and its application to high-surface-area NW photoelectrodes, establish a general approach for minimizing the cost of precious-metal cocatalysts for efficient and affordable solar-to-fuel applications.
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MEDLINE
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En
Revista:
J Am Chem Soc
Año:
2013
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Article
País de afiliación:
Estados Unidos