Adaptive Bifunctional Electrocatalyst of Amorphous CoFe Oxide @ 2D Black Phosphorus for Overall Water Splitting

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 gro...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Angewandte Chemie International Edition Jg. 59; H. 47; S. 21106 - 21113
Hauptverfasser: Li, Xingyun, Xiao, Liangping, Zhou, Ling, Xu, Qingchi, Weng, Jian, Xu, Jun, Liu, Bin
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Weinheim Wiley Subscription Services, Inc 16.11.2020
Ausgabe:International ed. in English
Schlagworte:
amorphous
bifunctional catalyst
black phosphorus
Catalysts
Clean technology
Cobalt
Electrocatalysts
Electrolysis
Hydrogen evolution reactions
in situ transformation
Oxidation
Oxygen evolution reactions
Phosphides
Phosphorus
Reaction kinetics
Smart structures
Surface structure
water electrolysis
Water splitting
ISSN:1433-7851, 1521-3773, 1521-3773
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung: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. By growing amorphous multi‐transition‐metal (cobalt and iron) oxide on two‐dimensional (2D) black phosphorus (BP), a bifunctional electrocatalyst (CoFeO@BP), which is able to efficiently catalyze both HER and OER was developed. 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.
Bibliographie:These authors contributed equally to this work.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202008514