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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.7b02786
|2 doi
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|a pubmed24n0939.xml
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|a (DE-627)NLM281935653
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|a (NLM)29537275
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Hussain, Shabeeb
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Nanotextured Spikes of α-Fe2O3/NiFe2O4 Composite for Efficient Photoelectrochemical Oxidation of Water
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 21.06.2018
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|a Date Revised 21.06.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We demonstrate for the first time the application of p-NiFe2O4/n-Fe2O3 composite thin films as anode materials for light-assisted electrolysis of water. The p-NiFe2O4/n-Fe2O3 composite thin films were deposited on planar fluorinated tin oxide (FTO)-coated glass as well as on 3D array of nanospike (NSP) substrates. The effect of substrate (planar FTO and 3D-NSP) and percentage change of each component (i.e., NiFe2O4 and Fe2O3) of composite was studied on photoelectrochemical (PEC) water oxidation reaction. This work also includes the performance comparison of p-NiFe2O4/n-Fe2O3 composite (planar and NSP) devices with pure hematite for PEC water oxidation. Overall, the nanostructured p-NiFe2O4/n-Fe2O3 device with equal molar 1:1 ratio of NiFe2O4 and Fe2O3 was found to be highly efficient for PEC water oxidation as compared with pure hematite, 1:2 and 1:3 molar ratios of composite. The photocurrent density of 1:1 composite thin film on planar substrate was equal to 1.07 mA/cm2 at 1.23 VRHE, which was 1.7 times higher current density as compared with pure hematite device (0.63 mA/cm2 at 1.23 VRHE). The performance of p-NiFe2O4/n-Fe2O3 composites in PEC water oxidation was further enhanced by their deposition over 3D-NSP substrate. The highest photocurrent density of 2.1 mA/cm2 at 1.23 VRHE was obtained for the 1:1 molar ratio p-NiFe2O4/n-Fe2O3 composite on NSP (NF1-NSP), which was 3.3 times more photocurrent density than pure hematite. The measured applied bias photon-to-current efficiency (ABPE) value of NF1-NSP (0.206%) was found to be 1.87 times higher than that of NF1-P (0.11%) and 4.7 times higher than that of pure hematite deposited on FTO-coated glass (0.044%). The higher PEC water oxidation activity of p-NiFe2O4/n-Fe2O3 composite thin film as compared with pure hematite is attributed to the Z-path scheme and better separation of electrons and holes. The increased surface area and greater light absorption capabilities of 3D-NSP devices result in further improvement in catalytic activities
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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| 700 |
1 |
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|a Tavakoli, Mohammad Mahdi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Waleed, Aashir
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Virk, Umar Siddique
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Shihe
|e verfasserin
|4 aut
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| 700 |
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|a Waseem, Amir
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fan, Zhiyong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Nadeem, Muhammad Arif
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 34(2018), 12 vom: 27. März, Seite 3555-3564
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:34
|g year:2018
|g number:12
|g day:27
|g month:03
|g pages:3555-3564
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|u http://dx.doi.org/10.1021/acs.langmuir.7b02786
|3 Volltext
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|d 34
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|h 3555-3564
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