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Layered Perovskite Nanofibers via Electrospinning for Overall Water Splitting
Author(s) -
Hildebrandt Nils C.,
Soldat Julia,
Marschall Roland
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201402679
Subject(s) - nanofiber , electrospinning , calcination , materials science , chemical engineering , photocatalysis , perovskite (structure) , catalysis , amorphous solid , morphology (biology) , methanol , water splitting , nanotechnology , polymer , composite material , organic chemistry , chemistry , biology , engineering , genetics
The (111)‐layered perovskite materials Ba 5 Ta 4 O 15 , Ba 5 Ta 2 Nb 2 O 15 and Ba 5 Nb 4 O 15 are prepared with nanofiber morphology via electrospinning for the first time. The nanofibers are built up from small single crystals, with up to several micrometers length even after calcination. The formation mechanism is investigated in detail, revealing an intermediate formation of amorphous barium carbonate strengthening the nanofiber morphology for high temperature treatment. All nanofiber compounds are able to generate hydrogen without any co‐catalyst in photocatalytic reformation of methanol. After photodeposition of Rh‐Cr 2 O 3 co‐catalysts, the nanofibers show better activity in overall water splitting compared to sol–gel‐derived powders.