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- W3041779729 abstract "High loadings of Cu were integrated on the light-facing side of Si microwire arrays used under simulated sunlight for the photoelectrochemical reduction of CO2(aq) to hydrocarbons in 0.10 M KHCO3(aq). Radial-junction n+p-Si microwire arrays decorated with Cu exhibited absolute photocurrent densities comparable to an uncovered Si surface. Moreover, with respect to a Cu foil electrode, the positive shift in the onset potential for hydrocarbon formation at n+p-Si/Cu microwire arrays was equal to or greater than the photovoltage of the semiconductor alone. Selective electrodeposition of Cu on the tips and sidewalls of Si microwires was responsible for the minimal parasitic reflection and absorption exhibited by the catalyst, such that light-limited, absolute current densities >25 mA·cm–2 were sustained for 48 h under simulated sunlight. Photoelectrodes prepared from semiconductors with low diode quality factors and electrocatalysts with large Tafel slopes are shown to benefit from increased microstructured surface area. Si microwire arrays are thus suitable for photoelectrochemical reactions requiring high loadings of metallic and reflective electrocatalysts." @default.
- W3041779729 created "2020-07-16" @default.
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- W3041779729 date "2020-07-07" @default.
- W3041779729 modified "2023-09-25" @default.
- W3041779729 title "Si Microwire-Array Photocathodes Decorated with Cu Allow CO<sub>2</sub> Reduction with Minimal Parasitic Absorption of Sunlight" @default.
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- W3041779729 doi "https://doi.org/10.1021/acsenergylett.0c01334" @default.
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