ORCID Profile
0000-0002-7843-6811
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Publisher: Springer Science and Business Media LLC
Date: 18-07-2014
Publisher: American Chemical Society (ACS)
Date: 13-01-2015
DOI: 10.1021/CM503784X
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3NR06675D
Abstract: 3D electrodes are critical to high-performance power sources. Now by combining imprint and soft-printing technologies, 3D nanocone arrays have been designed and fabricated for high performance pseudocapacitors.
Publisher: Elsevier BV
Date: 2015
Publisher: American Chemical Society (ACS)
Date: 11-03-2014
DOI: 10.1021/NL500359E
Abstract: Photoelectrochemical (PEC) solar water splitting represents a clean and sustainable approach for hydrogen (H2) production and substantial research are being performed to improve the conversion efficiency. Hematite (α-Fe2O3) is considered as a promising candidate for PEC water splitting due to its chemical stability, appropriate band structure, and abundance. However, PEC performance based on hematite is hindered by the short hole diffusion length that put a constraint on the active layer thickness and its light absorption capability. In this work, we have designed and fabricated novel PEC device structure with ultrathin hematite film deposited on three-dimensional nanophotonic structure. In this fashion, the nanophotonic structures can largely improve the light absorption in the ultrathin active materials. In addition, they also provide large surface area to accommodate the slow surface water oxidation process. As the result, high current density of 3.05 mA cm(-2) at 1.23 V with respect to the reversible hydrogen electrode (RHE) has been achieved on such nanophotonic structure, which is about three times of that for a planar photoelectrode. More importantly, our systematic analysis with experiments and modeling revealed that the design of high performance PEC devices needs to consider not only total optical absorption, but also the absorption profile in the active material, in addition to electrode surface area and carrier collection.
Publisher: Elsevier BV
Date: 03-2015
Publisher: American Chemical Society (ACS)
Date: 18-09-2014
DOI: 10.1021/JP507800T
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR00480B
Abstract: The mesoporous Li 2 S–C nanofiber cathode demonstrated a low activation potential and a high initial discharge capacity of 800 mA h g −1 .
Publisher: Elsevier BV
Date: 04-2018
Publisher: Wiley
Date: 02-05-2017
No related grants have been discovered for Yongcai Qiu.