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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003776naa a2200397 4500
001oai:DiVA.org:su-187897
003SwePub
008201217s2020 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1878972 URI
0247 a https://doi.org/10.1021/acs.inorgchem.0c019472 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Chen, Zheng4 aut
2451 0a Tailoring the Surface Properties of Bi2O2NCN by in Situ Activation for Augmented Photoelectrochemical Water Oxidation on WO3 and CuWO4 Heterojunction Photoanodes
264 c 2020-09-04
264 1b American Chemical Society (ACS),c 2020
338 a print2 rdacarrier
520 a Bismuth(III) oxide-carbodiimide (Bi2O2NCN) has been recently discovered as a novel mixed-anion semiconductor, which is structurally related to bismuth oxides and oxysulfides. Given the structural versatility of these layered structures, we investigated the unexplored photochemical properties of the target compound for photoelectrochemical (PEC) water oxidation. Although Bi2O2NCN does not generate a noticeable photocurrent as a single photoabsorber, the fabrication of heterojunctions with the WO3 thin film electrode shows an upsurge of current density from 0.9 to 1.1 mA cm–2 at 1.23 V vs reversible hydrogen electrode (RHE) under 1 sun (AM 1.5G) illumination in phosphate electrolyte (pH 7.0). Mechanistic analysis and structural analysis using powder X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and scanning transmission electron microscopy energy-dispersive X-ray spectroscopy (STEM EDX) indicate that Bi2O2NCN transforms during operating conditions in situ to a core–shell structure Bi2O2NCN/BiPO4. When compared to WO3/BiPO4, the in situ electrolyte-activated WO3/Bi2O2NCN photoanode shows a higher photocurrent density due to superior charge separation across the oxide/oxide-carbodiimide interface layer. Changing the electrolyte from phosphate to sulfate results in a lower photocurrent and shows that the electrolyte determines the surface chemistry and mediates the PEC activity of the metal oxide-carbodiimide. A similar trend could be observed for CuWO4 thin film photoanodes. These results show the potential of metal oxide-carbodiimides as relatively novel representatives of mixed-anion compounds and shed light on the importance of the control over the surface chemistry to enable the in situ activation.
650 7a NATURVETENSKAPx Kemi0 (SwePub)1042 hsv//swe
650 7a NATURAL SCIENCESx Chemical Sciences0 (SwePub)1042 hsv//eng
7001 a Corkett, Alex J.4 aut
7001 a de Bruin-Dickason, Casparu Stockholms universitet,Institutionen för material- och miljökemi (MMK)4 aut0 (Swepub:su)cade6390
7001 a Chen, Jianhongu Stockholms universitet,Institutionen för material- och miljökemi (MMK)4 aut0 (Swepub:su)jich2514
7001 a Rokicińska, Anna4 aut
7001 a Kuśtrowski, Piotr4 aut
7001 a Dronskowski, Richard4 aut
7001 a Slabon, Adamu Stockholms universitet,Institutionen för material- och miljökemi (MMK)4 aut0 (Swepub:su)adsl1265
7102 a Stockholms universitetb Institutionen för material- och miljökemi (MMK)4 org
7730 t Inorganic Chemistryd : American Chemical Society (ACS)g 59:18, s. 13589-13597q 59:18<13589-13597x 0020-1669x 1520-510X
8564 u https://doi.org/10.1021/acs.inorgchem.0c01947y Fulltext
8564 u https://pubs.acs.org/doi/pdf/10.1021/acs.inorgchem.0c01947
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-187897
8564 8u https://doi.org/10.1021/acs.inorgchem.0c01947

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