In:
Advanced Science, Wiley
Abstract:
Electrochemical oxygen reduction reaction (ORR) is an attractive and alternative route for the on‐site production of hydrogen peroxide (H 2 O 2 ). The electrochemical synthesis of H 2 O 2 in neutral electrolyte is in early studying stage and promising in ocean‐energy application. Herein, N‐doped carbon materials (N‐C x ) with different N types are prepared through the pyrolysis of zeolitic imidazolate frameworks. The N‐C x catalysts, especially N‐C 800 , exhibit an attracting 2e − ORR catalytic activity, corresponding to a high H 2 O 2 selectivity (≈95%) and preferable stability in 0.5 m NaCl solution. Additionally, the N‐C 800 possesses an attractive H 2 O 2 production amount up to 631.2 mmol g −1 h −1 and high Faraday efficiency (79.8%) in H‐type cell. The remarkable 2e − ORR electrocatalytic performance of N‐C x catalysts is associated with the N species and N content in the materials. Density functional theory calculations suggest carbon atoms adjacent to graphitic N are the main catalytic sites and exhibit a smaller activation energy, which are more responsible than those in pyridinic N and pyrrolic N doped carbon materials. Furthermore, the N‐C 800 catalyst demonstrates an effective antibacterial performance for marine bacteria in simulated seawater. This work provides a new insight for electro‐generation of H 2 O 2 in neutral electrolyte and triggers a great promise in ocean‐energy application.
Type of Medium:
Online Resource
ISSN:
2198-3844
,
2198-3844
DOI:
10.1002/advs.202302446
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2808093-2
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