TY - JOUR
T1 - Adaptive Bifunctional Electrocatalyst of Amorphous CoFe Oxide @ 2D Black Phosphorus for Overall Water Splitting
AU - Li, Xingyun
AU - Xiao, Liangping
AU - Zhou, Ling
AU - Xu, Qingchi
AU - Weng, Jian
AU - Xu, Jun
AU - Liu, Bin
PY - 2020/11/16
Y1 - 2020/11/16
N2 - Water electrolysis offers a promising green technology to tackle the global energy and environmental crisis, but its efficiency is greatly limited by the sluggish reaction kinetics of both the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). In this work, by growing amorphous multi-transition-metal (cobalt and iron) oxide on two-dimensional (2D) black phosphorus (BP), we develop a bifunctional electrocatalyst (CoFeO@BP), which is able to efficiently catalyze both HER and OER. The overpotentials for the hybrid CoFeO@BP catalyst to reach a current density of 10 mA cm−2 in 1 m KOH are 88 and 266 mV for HER and OER, respectively. Based on a series of ex-situ and in situ investigations, the excellent catalytic performance of CoFeO@BP is found to result from the adaptive surface structure under reduction and oxidation potentials. CoFeO@BP can be transformed to CoFe phosphide under reduction potential, in situ generating the real active catalyst for HER. © 2020 Wiley-VCH GmbH
AB - Water electrolysis offers a promising green technology to tackle the global energy and environmental crisis, but its efficiency is greatly limited by the sluggish reaction kinetics of both the cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). In this work, by growing amorphous multi-transition-metal (cobalt and iron) oxide on two-dimensional (2D) black phosphorus (BP), we develop a bifunctional electrocatalyst (CoFeO@BP), which is able to efficiently catalyze both HER and OER. The overpotentials for the hybrid CoFeO@BP catalyst to reach a current density of 10 mA cm−2 in 1 m KOH are 88 and 266 mV for HER and OER, respectively. Based on a series of ex-situ and in situ investigations, the excellent catalytic performance of CoFeO@BP is found to result from the adaptive surface structure under reduction and oxidation potentials. CoFeO@BP can be transformed to CoFe phosphide under reduction potential, in situ generating the real active catalyst for HER. © 2020 Wiley-VCH GmbH
KW - amorphous
KW - bifunctional catalyst
KW - black phosphorus
KW - in situ transformation
KW - water electrolysis
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U2 - 10.1002/anie.202008514
DO - 10.1002/anie.202008514
M3 - RGC 21 - Publication in refereed journal
C2 - 32767438
SN - 1433-7851
VL - 59
SP - 21106
EP - 21113
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 47
ER -
