In:
Energy Technology, Wiley, Vol. 10, No. 2 ( 2022-02)
Abstract:
It is crucial to develop efficient bifunctional electrocatalysts toward oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) for practical application. Herein, for the first time, Co‐based phosphate ((H 2 en) 0.5 CoPO 4 )) as a precursor with unique CoO 4 tetrahedra and diprotonated ethanediamine template (H 2 en) is simply and rapidly prepared, and the amorphous cobalt phosphate can be obtained via a mild calcination of this host–guest material. Furthermore, the optimal calcined electrocatalyst exhibits a low overpotential of 284 mV at 10 mA cm −2 toward OER and 0.78 V of half‐wave potential for ORR in 1.0 m KOH electrolyte. Furthermore, this bifunctional electrocatalyst as the cathode of zinc–air batteries displays a high‐power density of 178 mW cm −2 and specific capacitance of 754.5 mAh g −1 , accompanied by good cycling stability (for 50 h of operation). This work offers a new strategy to design heteroatom doping electrocatalysts using this host–guest method under a mild and environmental condition.
Type of Medium:
Online Resource
ISSN:
2194-4288
,
2194-4296
DOI:
10.1002/ente.202100940
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
2700412-0
