期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 297, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120474
关键词
MXene; Layered double hydroxide; Nanohybrids; OER; Synergistic effect
资金
- National Science Fund for Distinguished Young Scholars [52025041]
- National Natural Science Foundation of China [51974021]
- Natural Science Foundation of Shanghai [19ZR1479400]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology)
The synthesized H2PO2-/FeNiLDH-V2C catalyst exhibits excellent OER performance and durability, showing promise for advanced applications in renewable energy technologies. MXene-based nanohybrids have the potential to play a significant role in renewable energy applications.
Oxygen evolution reaction (OER) is a pivotal electrochemical reaction process for many renewable energy technologies. Due to the sluggish OER kinetics, searching for efficient low-cost non-precious metal catalysts is one of the crucial but very challenging steps. Herein, V2C MXene synergistically coupled with hypophosphiteintercalated FeNi (oxy)hydroxide (H2PO2-/FeNi-LDH-V2C) electrocatalyst is synthesized. The H2PO2-/FeNiLDH-V2C exhibits excellent OER performance with an overpotential of 250 mV (eta 10) and small Tafel slope of 46.5 mV dec- 1 in 1.0 M KOH electrolyte, and excellent rechargeable Zn-air battery performance with superior open circuit potential (1.42 eV), power density (137 mW cm-2) and well durability. The strong interaction and electronic coupling with prominent charge-transfer between FeNi-LDHs and V2C MXene endow the composite significant OER performance and structural stability, and the adsorption/desorption balance for the OER reaction pathway, eventually promoting the intrinsic activity. This work demonstrates the great promise of MXene-based nanohybrids as advanced electrocatalysts for renewable energy applications.
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