Potassium-driven tuning of α-MnO2 tunnel structures for soot oxidation

Fangfang Dai

doi:10.1016/j.jece.2026.123522

Potassium-driven tuning of α-MnO2 tunnel structures for soot oxidation

2026-06-08

0

PRE

AI

F

Fangfang Dai *

C

Chengyun Guo

Z

Zhe Bai

C

Chen Wang

K

Kang Zhang

Z

Zhenhong He

Y

Yuxia Zhang

K

Kai Li

DOI：10.1016/j.jece.2026.123522

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Abstract

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• Tunnel K+ loading in hydrothermally grown α-MnO2 varied for tight-contact soot oxidation. • 0.4KMnO exhibits 96% CO₂ selectivity and a soot removal T90 of 346 °C in O₂. • Characterization resutls show tunnel K+ weakens Mn–O bonds and elevates O species. • DFT shows tunnel K+ promotes vacancy formation and O2/NO adsorption.

Potassium-driven tuning of α-MnO2 tunnel structures for soot oxidation

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