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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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Article information


Submitted
31 Jan 2015
Accepted
23 Mar 2015
First published
23 Mar 2015

Energy Environ. Sci., 2015,8, 1443-1449
Article type
Communication

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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