Polyoxometalates etched bimetal metal-organic frameworks boosted photocatalytic CO<sub>2</sub> reduction

Li Xiaohong; Dong Yiyan; Kou Xihao; Wang Ziling; Sun Meng; Zhang Yuteng; Yu Haihui; Ma Youzhi; Zhang Haifeng

doi:10.11949/0438-1157.20251265

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Polyoxometalates etched bimetal metal-organic frameworks boosted photocatalytic CO₂ reduction

更新时间：2026-04-07

- Polyoxometalates etched bimetal metal-organic frameworks boosted photocatalytic CO₂ reduction
- CIESC Journal Pages: 1-13(2026)
- 作者机构：
  
  东北电力大学化学工程学院，吉林吉林，132012
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20251265
  CLC： TQ135.3
- Received：13 November 2025，
  
  Revised：2026-01-06，
  
  Online First：07 April 2026，
- 稿件说明：
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李晓红, 董一宴, 寇曦皓, 王梓灵, 孙萌, 张誉腾, 于海辉, 马友志, 张海丰. 多金属氧酸盐刻蚀双金属有机框架促进光催化CO₂还原[J]. 化工学报, DOI: 10.11949/0438-1157.20251265

Li Xiaohong, Dong Yiyan, Kou Xihao, Wang Ziling, Sun Meng, Zhang Yuteng, Yu Haihui, Ma Youzhi, Zhang Haifeng. Polyoxometalates etched bimetal metal-organic frameworks boosted photocatalytic CO₂ reduction[J]. CIESC Journal, DOI: 10.11949/0438-1157.20251265
李晓红, 董一宴, 寇曦皓, 王梓灵, 孙萌, 张誉腾, 于海辉, 马友志, 张海丰. 多金属氧酸盐刻蚀双金属有机框架促进光催化CO₂还原[J]. 化工学报, DOI: 10.11949/0438-1157.20251265 DOI：

Li Xiaohong, Dong Yiyan, Kou Xihao, Wang Ziling, Sun Meng, Zhang Yuteng, Yu Haihui, Ma Youzhi, Zhang Haifeng. Polyoxometalates etched bimetal metal-organic frameworks boosted photocatalytic CO₂ reduction[J]. CIESC Journal, DOI: 10.11949/0438-1157.20251265 DOI：

摘要

光催化技术能够将CO

高效转化为高附加值的碳基化合物与燃料，为缓解能源危机与环境问题提供可持续路径。然而，催化剂表面活性位点不足及严重的电子-空穴复合问题仍然是限制其催化性能的关键瓶颈。本研究创新性地构筑了多金属氧酸盐（POMs）刻蚀双金属有机框架（BiMOFs）光催化剂（PMo

/MIL-88A（FeNi）），并系统探究其催化性能与反应机理。CO生成速率可达1990.2 μmol g

-1

，显著优于纯PMo

（149.7 μmol g

-1

）和MIL-88A（FeNi）（361.2 μmol g

-1

），实现了13.3倍和5.5倍的提升，且CO选择性高达98.9%。性能提升主要归因于PMo

与MIL-88A（FeNi）之间的协同效应：PMo

诱导MIL-88A（FeNi）形成空心壳层结构，产生“中空化”效应，促进对CO

的吸附和活化；进一步缩短电子传输距离，增强载流子分离和迁移。同时，PMo

电子泵可以有效捕获MIL-88A（FeNi）的激发电子，促进更多电子转移，有效抑制电子-空穴对的复合，从而显著提升催化性能。原位红外光谱揭示整个反应路径。本研究不仅阐明了POMs刻蚀BiMOFs提高催化性能的内在机制，也为设计高效催化剂提供新的思路和方向。

Abstract

Photocatalytic conversion of CO

into high-value carbon-based compounds and fuels presents a promising strategy to alleviate energy crisis and environmental issues. However

insufficient active sites on catalyst surface and severe electron-hole recombination still remain the key bottlenecks restricting catalytic performance. Herein

a kind of polyoxometalates (POMs)-based bimetal metal-organic frameworks (BiMOF) (PMo

/MIL-88A(FeNi)) was innovatively synthesized via an etching strategy

and its catalytic performance and reaction mechanism were systematically explored. The photocatalytic conversion efficiency of CO

to CO reached 1990.2 μmol g

-1

which is 13.3 and 5.5 times higher than that of PMo

(149.7 μmol g

-1

) and MIL-88A (FeNi) (361.2 μmol g

-1

)

respectively

with a CO selectivity of 98.9%. The excellent performance of PMo

/MIL-88A(FeNi) is mainly attributed to the synergistic effect between PMo

and MIL-88A (FeNi): PMo

etching MIL-88

A (FeNi) induces the formation of a hollow shell structure with a "hollowing" effect

thus promoting CO

adsorption and activation and shortening the electron transfer distance in favor of enhancing the separation and migration of photogenerated carriers. Meanwhile

PMo

as electron-sponge effectively captures excited electrons of MIL-88A(FeNi)

facilitate more electron transfer and inhibit electron-hole pairs recombination

thereby significantly boosting the photocatalytic performance. Also

the entire reaction pathway was revealed via

in-situ

diffuse reflectance infrared Fourier transform spectroscopy. This study clarifies the intrinsic mechanism of enhanced catalytic performance through POMs etching BiMOFs

and provides new ideas and directions for the design of efficient catalysts.

关键词

Keywords

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⁰

Polyoxometalates etched bimetal metal-organic frameworks boosted photocatalytic CO2 reduction

DOI：10.11949/0438-1157.20251265

摘要

Abstract

关键词

Keywords

references

Polyoxometalates etched bimetal metal-organic frameworks boosted photocatalytic CO₂ reduction