期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 135, 期 35, 页码 12932-12935出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja405680p
关键词
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资金
- U.S. Department of Energy through an Office of Energy Efficiency and Renewable Energy (EERE) Postdoctoral Research Award under the SunShot Solar Energy Technologies Program
- Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, U.S. Department of Energy [DE-AC02-05CH11231]
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 similar to 10 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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