TY - JOUR
T1 - Electrochemical fabrication of ZnO-CdSe core-shell nanorod arrays for efficient photoelectrochemical water splitting
AU - Miao, Jianwei
AU - Yang, Hong Bin
AU - Khoo, Si Yun
AU - Liu, Bin
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2013/11/21
Y1 - 2013/11/21
N2 - Efficient hydrogen production from photoelectrochemical (PEC) water splitting is a promising route to solve the approaching energy crisis. Herein, we report a facile all-electrochemical approach to fabricate well-aligned ZnO-CdSe core-shell nanorod arrays with excellent uniformity on transparent indium tin oxide (ITO) substrates. The shell thickness of the core-shell nanorods can be tuned precisely by adjusting the charge density passing through the working electrode during the deposition of CdSe quantum dots (QDs). The optimized ZnO-CdSe nanorod arrays showed excellent PEC performance with a significant saturated photocurrent density of 14.9 mA cm-2 at 0.8 V (vs. RHE) under AM 1.5 illumination, which is, to the best of our knowledge, the highest value ever reported for similar nanostructures, owing to the favourable band alignment and good distribution of CdSe QDs on ZnO nanorods. Our results demonstrate that the electrochemically deposited ZnO-CdSe nanorod arrays can be utilized as efficient photoanodes in PEC water splitting cells. © 2013 The Royal Society of Chemistry.
AB - Efficient hydrogen production from photoelectrochemical (PEC) water splitting is a promising route to solve the approaching energy crisis. Herein, we report a facile all-electrochemical approach to fabricate well-aligned ZnO-CdSe core-shell nanorod arrays with excellent uniformity on transparent indium tin oxide (ITO) substrates. The shell thickness of the core-shell nanorods can be tuned precisely by adjusting the charge density passing through the working electrode during the deposition of CdSe quantum dots (QDs). The optimized ZnO-CdSe nanorod arrays showed excellent PEC performance with a significant saturated photocurrent density of 14.9 mA cm-2 at 0.8 V (vs. RHE) under AM 1.5 illumination, which is, to the best of our knowledge, the highest value ever reported for similar nanostructures, owing to the favourable band alignment and good distribution of CdSe QDs on ZnO nanorods. Our results demonstrate that the electrochemically deposited ZnO-CdSe nanorod arrays can be utilized as efficient photoanodes in PEC water splitting cells. © 2013 The Royal Society of Chemistry.
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U2 - 10.1039/c3nr03425a
DO - 10.1039/c3nr03425a
M3 - RGC 21 - Publication in refereed journal
C2 - 24077389
SN - 2040-3364
VL - 5
SP - 11118
EP - 11124
JO - Nanoscale
JF - Nanoscale
IS - 22
ER -
