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Black Phosphorus‐Based Compound with Few Layers for Photocatalytic Water Oxidation
Author(s) -
Yan Junqing,
Ji Yujin,
Kong Lingqiao,
Li Youyong,
NavlaniGarcía Miriam,
Liu Shengzhong Frank,
Kuwahara Yasutaka,
Mori Kohsuke,
Che Michel,
Yamashita Hiromi
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201800555
Subject(s) - photocatalysis , x ray photoelectron spectroscopy , black phosphorus , catalysis , water splitting , hydroxide , nanosheet , density functional theory , materials science , chemistry , inorganic chemistry , nuclear chemistry , photochemistry , chemical engineering , nanotechnology , computational chemistry , organic chemistry , optoelectronics , engineering
Although black phosphorus (BP) is an interesting 2D nanosheet material with a high hole mobility, its application in the photocatalytic water oxidation for O 2 evolution is not reported yet. Herein the use of BP coupled with a reductive hydroxide, Ni(OH) 2 , is reported for the first time. The developed photo‐assisted process confirms that the BP XPS measurements confirm that the oxidation state of BP is reduced through the photo‐assisted loading method. The obtained P−Ni(OH) 2 samples present the steady and efficient photocatalytic water splitting for O 2 generation. Under the simulated sunlight irradiation in 0.1 M Na 2 S 2 O 4 solution, the O 2 generation rate can reach up to 15.7 μmol/(g catalyst *h) or 224.3 μmol/(g BP *h). The density functional theory (DFT) calculation suggests that the electrons and holes move to surface of BP and Ni(OH) 2 , respectively. The merit of self‐polarization of P−Ni(OH) 2 ensures the stability of BP and achieves the photocatalytic O 2 generation from water.