CeO<italic style="font-style: italic"><sub>x</sub></italic> nanoislands-coated CoMnAlO<italic style="font-style: italic"><sub>x</sub></italic> layered double oxide for efficient ultralow-temperature photothermal catalytic denitrification

LI Yi; WANG Yu; WU Mingxia; BAI Ruixue; LIU Lin; WAN Jun

doi:10.11949/0438-1157.20260611

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CeO_x nanoislands-coated CoMnAlO_x layered double oxide for efficient ultralow-temperature photothermal catalytic denitrification

更新时间：2026-06-24

- CeO_x nanoislands-coated CoMnAlO_x layered double oxide for efficient ultralow-temperature photothermal catalytic denitrification
- CIESC Journal (2026)
- 作者机构：
  
  延安大学化学与化工学院, 陕西省化学反应工程重点实验室, 陕西延安 716000
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260611
  CLC： TQ 134.1
- Received：29 April 2026，
  
  Revised：2026-06-16，
  
  Accepted：24 June 2026，
- 稿件说明：
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LI Yi, WANG Yu, WU Mingxia, et al. CeO_x nanoislands-coated CoMnAlO_x layered double oxide for efficient ultralow-temperature photothermal catalytic denitrification[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260611.
DOI：

LI Yi, WANG Yu, WU Mingxia, et al. CeO_x nanoislands-coated CoMnAlO_x layered double oxide for efficient ultralow-temperature photothermal catalytic denitrification[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260611. DOI：

摘要

为应对非电行业超低温（＜150 °C）烟气脱硝中氮氧化物（NO

）转化率与N

选择性低的挑战，本研究提出了一种低能耗的光热催化脱硝策略。通过调控水溶液中Ce

羟基络合物的形成及其在载体表面的静电吸附行为，并结合后续高温热处理诱导的界面限域生长，在CoMnAlO

层状双氧化物表面构建了高分散的CeO

纳米岛（NI），制备得到CeO

NI/CoMnAlO

光热催化剂。该催化剂表现出优异的光热转化和光热催化脱硝性能，在90 °C超低温烟气和1.5 W/cm

光照条件下，其NO

转化率高达98.4%，N

选择

性为90.9%，且表现出优异的稳定性。程序升温脱附和原位红外机理研究表明，CeO

纳米岛的引入增强了催化剂的氧化还原能力与Lewis酸性，优化了NH

与NO

吸附与活化，抑制了稳定硝酸盐积累并促进亚硝酸盐生成，从而协同提升超低温光热催化脱硝活性与选择性。本研究创新通过光热催化途径实现了超低温氨气选择性催化还原（NH

-SCR）的高效脱硝过程，为低温SCR催化剂的设计提供了新思路与机理参考，有利于推进超低温烟气脱硝的节能减排改造。

Abstract

To address the challenges of low nitrogen oxide (NO

) conversion and N

selectivity in the selective catalytic reduction (SCR) process of ultra-low temperature (

150 °C) flue gas from non-electric industries

this study proposed a fuel-efficient photothermal catalytic denitrification strategy. By regulating the formation of Ce

hydroxide complexes in the aqueous solution and their electrostatic adsorption behavior on the surface of the carrier

combined with the subsequent high-temperature heat treatment-induced interface confinement growth

highly dispersed CeO

nanodisks (NI) were constructed on the surface of CoMnAlO

layered double oxides

and the CeO

NI/CoMnAlO

photothermal catalyst was prepared. This catalyst exhibited excellent photothermal conversion and photothermal catalytic performance. Under the conditions of ultra-low temperature flue gas at 90 °C and illumination of 1.5 W/cm

the optimized CeO

NI/CoMnAlO

catalyst achieved 98.4% NO

conversion and 90.9% N

selectivity

and it also showed good stability in continuous reaction for 72 hours. Mechanism investigations on temperature-programmed desorption and in-situ infrared spectroscopy reveal that the introduction of CeO

NI enhances the redox ability and Lewis acidity of the catalyst

optimizes the adsorption and activation of NH

and NO

suppresses th

e accumulation of stable nitrates

and promotes the formation of nitrites

thereby synergistically improving the activity and selectivity of ultra-low temperature photothermal catalytic denitrification. This study innovatively achieved an efficient denitrification process for ultra-low temperature ammonia selective catalytic reduction (NH

-SCR) through the photothermal catalytic pathway

offering new insights and mechanistic guidance for the design of advanced low-temperature SCR catalysts

and facilitating the energy-saving and emission-reduction transformation for ultra-low temperature flue gas denitrification.

关键词

Keywords

references

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⁰

CeOx nanoislands-coated CoMnAlOx layered double oxide for efficient ultralow-temperature photothermal catalytic denitrification

DOI：10.11949/0438-1157.20260611

摘要

Abstract

关键词

Keywords

references

CeO_x nanoislands-coated CoMnAlO_x layered double oxide for efficient ultralow-temperature photothermal catalytic denitrification