Enhanced Electrocatalytic Capacity of Two POM@NH2-MIL-101(Fe) Composites for Oxygen Evolution Reaction

IF 3.9 3区化学 Q2 CHEMISTRY, PHYSICAL ChemCatChem Pub Date : 2024-11-05 DOI:10.1002/cctc.202401594

Xiaoxue Huang, Hongji Kang, Huizhen Wang, Daopeng Zhang, Lu Yang, Zhen Zhou

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Abstract

The development and exploration of efficient bifunctional electrocatalysts for water splitting are in high demand and have garnered significant attention in recent years. Herein, by incorporating the advantages of catalytically active polyoxometalates (POMs) and structural stable metal–organic frameworks (MOFs), two POM@MOFs composite materials, Ni₄Mo₁₂@Fe and Co₄Mo₁₂@Fe, have been successfully prepared via the encapsulation of POMs anions, [Mo^V₁₂O₃₀(μ₂-OH)₁₀H₂{Ni^II₄(H₂O)₁₂}]∙14H₂O (noted as Ni₄Mo₁₂) and [Mo^V₁₂O₃₀(μ₂-OH)₁₀ H₂{Co^II(H₂O)₃}₄]∙12H₂O (noted as Co₄Mo₁₂), into the cavities of MOFs NH₂-MIL-101(Fe), respectively. Compared to each individual components, Ni₄Mo₁₂@Fe and Co₄Mo₁₂@Fe composites, as heterogeneous electrocatalysts, both showed enhanced electrocatalytic capacities for efficient oxygen evolution reaction (OER) under alkaline conditions with overpotentials of 332.64 mV for Ni₄Mo₁₂@Fe and 352.64 mV for Co₄Mo₁₂@Fe at 10 mA cm⁻². Additionally, the enhanced electrocatalytic capacities of these two composites could also achieve towards hydrogen evolution reaction (HER). Such a POMs-assisted strategy for the formation of POM@MOFs composites, described here, paves a new avenue for the development of highly economical, active nonnoble metal bifunctional electrocatalysts for OER and HER.

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两种POM@NH2-MIL-101（Fe）复合材料对析氧反应电催化性能的增强

近年来，开发和探索高效的双功能水分解电催化剂已成为人们关注的热点。本文结合催化活性多金属氧酸盐（POMs）和结构稳定的金属有机骨架（MOFs）的优点，将POMs阴离子[MoV12O30(μ2-OH)10H2{NiII4(H2O)12}]∙14H2O （Ni4Mo12）和[MoV12O30(μ2-OH)10H2{CoII(H2O)3}4]∙12H2O （Co4Mo12）分别包封在mfs NH2-MIL-101（Fe）的空腔中，成功制备了Ni4Mo12@Fe和Co4Mo12@Fe两种POM@MOFs复合材料。与各组分相比，Ni4Mo12@Fe和Co4Mo12@Fe复合材料作为非均相电催化剂，均表现出在碱性条件下高效析氧反应（OER）的电催化能力，在10 mA cm−2下，Ni4Mo12@Fe和Co4Mo12@Fe的过电位分别为332.64 mV和352.64 mV。此外，这两种复合材料的电催化能力的增强也可以实现析氢反应（HER）。本文所述的这种poms辅助策略形成POM@MOFs复合材料，为开发高经济、活性的OER和HER非贵金属双功能电催化剂铺平了新的道路。

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来源期刊

ChemCatChem 化学-物理化学

CiteScore

8.10

自引率

4.40%

发文量

511

审稿时长

1.3 months

期刊介绍： With an impact factor of 4.495 (2018), ChemCatChem is one of the premier journals in the field of catalysis. The journal provides primary research papers and critical secondary information on heterogeneous, homogeneous and bio- and nanocatalysis. The journal is well placed to strengthen cross-communication within between these communities. Its authors and readers come from academia, the chemical industry, and government laboratories across the world. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies, and is supported by the German Catalysis Society.