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In situ metal doping during modified anodization synthesis of Nb 2 O 5 with enhanced photoelectrochemical water splitting
Author(s) -
Hu Chenyan,
Teoh Wey Yang,
Ji Shulin,
Ye Changhui,
Iwase Akihide
Publication year - 2016
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15048
Subject(s) - anodizing , dopant , doping , water splitting , materials science , alkali metal , photoelectrochemistry , electrode , metal , analytical chemistry (journal) , nanotechnology , chemical engineering , optoelectronics , electrochemistry , chemistry , metallurgy , catalysis , photocatalysis , aluminium , biochemistry , organic chemistry , chromatography , engineering
Significance A new technique of in situ doping of alkali metal (Li + , Na + , K + , Rb + , and Cs + ) in Nb 2 O 5 was showcased by the modified anodization of Nb foils at high frequency, negative‐to‐positive pulsed voltage. At the optimized dopant concentration and synthesis condition, the doped‐Nb 2 O 5 shows twofold enhancement in photoelectrochemical water splitting efficiencies compared with the undoped Nb 2 O 5 electrode, as a result of improved charge carrier density and enhanced surface charge transfer. © 2015 American Institute of Chemical Engineers AIChE J , 62: 352–358, 2016