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Spatial Location Engineering of Oxygen Vacancies for Optimized Photocatalytic H 2 Evolution Activity
Author(s) -
Bi Wentuan,
Ye Chunmiao,
Xiao Chong,
Tong Wei,
Zhang Xiaodong,
Shao Wei,
Xie Yi
Publication year - 2014
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.201303548
Subject(s) - oxygen evolution , oxygen , photocatalysis , recombination , service (business) , materials science , absorption (acoustics) , computer science , chemistry , business , organic chemistry , biochemistry , electrode , composite material , electrochemistry , gene , catalysis , marketing
Enhanced H 2 evolution efficiency is achieved via manipulating the spatial location of oxygen vacancies in niobates. The ultrathin K 4 Nb 6 O 17 nanosheets which are rich in surface oxygen vacancies show enhanced optical absorption and band gap narrowing. Meanwhile, the fast charge separation effectively reduces the probability of hole‐electron recombination, enabling 20 times hydrogen evolution rate compared with the defect‐free bulk counterpart.