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Issue 5, 2015
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A solution-processed, mercaptoacetic acid-engineered CdSe quantum dot photocathode for efficient hydrogen production under visible light irradiation

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Abstract

We describe here a simple, efficient and stable CdSe QDs/NiO photocathode engineered using a molecular linker, mercaptoacetic acid (MAA), for H2 generation from neutral water. This protocol does not require any sacrificial reagent, external cocatalyst, protecting layer and buffer solution as well. Upon visible-light irradiation, photocurrent as high as −60 μA cm−2 is achieved at a bias of −0.1 V vs. NHE in 0.1 M Na2SO4 (pH 6.8). Simultaneously, the photocathode evolves H2 consistently for 45 h with ∼100% Faradic efficiency, which is unprecedented in the field of sensitized photocathodes for H2 production. A mechanistic study reveals that the exceptional performance is derived from the efficient hole transfer process.

Graphical abstract: A solution-processed, mercaptoacetic acid-engineered CdSe quantum dot photocathode for efficient hydrogen production under visible light irradiation

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Publication details

The article was received on 31 Jan 2015, accepted on 23 Mar 2015 and first published on 23 Mar 2015


Article type: Communication
DOI: 10.1039/C5EE00331H
Citation: Energy Environ. Sci., 2015,8, 1443-1449
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    A solution-processed, mercaptoacetic acid-engineered CdSe quantum dot photocathode for efficient hydrogen production under visible light irradiation

    B. Liu, X. Li, Y. Gao, Z. Li, Q. Meng, C. Tung and L. Wu, Energy Environ. Sci., 2015, 8, 1443
    DOI: 10.1039/C5EE00331H

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