Tailoring the crystal forms of the Ni-MOF catalysts for enhanced photocatalytic CO2-to-CO performance

IF 21.1 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2022-07-15 DOI:10.1016/j.apcatb.2022.121232

Kainan Song , Shujie Liang , Xiaohui Zhong , Mengye Wang , Xiaofeng Mo , Xueqian Lei , Zhang Lin

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引用次数: 43

Abstract

While semiconductor nanocrystals with different crystal forms typically show different catalytic performances, such behavior has been scarcely documented for metal-organic frameworks (MOFs). Herein, two Ni-MOF catalysts with different crystal forms have been successfully prepared and used in photo-reduction of CO₂. With a prolonged lifetime (5 h vs 2 h) and higher yield of the product CO (34 μmol vs 18 μmol), Ni-MOF(H₂O) demonstrates a much better performance than Ni-MOF. Theoretical studies reveal that the adsorption energy of a CO₂ molecule is more negative on Ni-MOF(H₂O) than on Ni-MOF (−0.85 eV vs −0.62 eV). Furthermore, the transfer and separation of the photo-generated charge carriers are also more efficient in the Ni-MOF(H₂O) system. This study not only presents a superior Ni-MOF catalyst but also promotes the fabrication of highly active catalysts for the photo-reduction of CO₂.

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裁剪Ni-MOF催化剂的晶体形式，增强光催化CO2-to-CO的性能

虽然不同晶型的半导体纳米晶体通常表现出不同的催化性能，但对于金属有机骨架(mof)来说，这种行为几乎没有记录。本文成功制备了两种不同晶型的Ni-MOF催化剂，并将其用于CO2光还原。Ni-MOF(H2O)寿命长(5 h vs 2 h)，产物CO产率高(34 μmol vs 18 μmol)，性能明显优于Ni-MOF。理论研究表明，CO2分子在Ni-MOF(H2O)上的吸附能比在Ni-MOF上的吸附能更负(- 0.85 eV vs - 0.62 eV)。此外，光生成的载流子在Ni-MOF(H2O)体系中的转移和分离效率也更高。本研究不仅提供了一种优良的Ni-MOF催化剂，而且促进了高活性CO2光还原催化剂的制备。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.