Polymetal-Chelated Fabrication of Bimetallic Nanophosphides as Electrocatalysts for Zinc-Air Batteries.

Autor: Gao XW; Institute for Energy Electrochemistry and Urban Mines Metallurgy, School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110819, China.; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China., Mu JJ; Institute for Energy Electrochemistry and Urban Mines Metallurgy, School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110819, China., Wei R; Institute for Energy Electrochemistry and Urban Mines Metallurgy, School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110819, China., Wang X; Institute for Energy Electrochemistry and Urban Mines Metallurgy, School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110819, China., Gu Q; Australian Synchrotron (ANSTO), 800 Blackburn Rd, Clayton, VIC, 3168, Australia., Zhao LK; Institute for Energy Electrochemistry and Urban Mines Metallurgy, School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110819, China., Luo WB; Institute for Energy Electrochemistry and Urban Mines Metallurgy, School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110819, China.
Jazyk: angličtina
Zdroj: Small methods [Small Methods] 2024 Oct; Vol. 8 (10), pp. e2301645. Date of Electronic Publication: 2024 Apr 12.
DOI: 10.1002/smtd.202301645
Abstrakt: Bimetallic phosphides are considered as promising electrocatalysts for zinc-air batteries toward oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). To address the semi-conductor inherent low electronic conductivity and catalytic activity, a polymetal-chelated strategy is employed to in situ fabricate bimetallic nanophosphides within carbon matrix anchoring by chemical bonding. The employment of biomolecule polydopamine (PDA) efficiently anchors various transition metal ions due to its strong chelating capability via inherent functional groups. Furthermore, the chelation of multi-metal ion is proved to promote the formation of graphitic nitrogen. The bimetallic Fe x Co y P phosphides nanoparticles are intimately encapsulated in carbon matrix through in situ carbonization and phosphatization processes. When utilized in Zinc-air batteries, Fe 0.20 Co 0.80 P anchored within N, P co-doped sub-microsphere (Fe 0.20 Co 0.80 P /PNC) exhibit a maximum power density of 167 mW cm -2 and cycle life up to 270 cycles, with a round-trip voltage of 0.955 V. The mechanisms for catalytic activity passivation are ascribed to the etching of nitrogen and oxidation of phosphorus in carbon matrix, as well as the oxidation of the surface phosphide on the sub-microspheres. This study presents a promising candidate for advancing the further development of energy conversation catalysis.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: