{"title":"Enhanced Electrocatalytic Capacity of Two POM@NH2-MIL-101(Fe) Composites for Oxygen Evolution Reaction","authors":"Xiaoxue Huang, Hongji Kang, Huizhen Wang, Daopeng Zhang, Lu Yang, Zhen Zhou","doi":"10.1002/cctc.202401594","DOIUrl":null,"url":null,"abstract":"<p>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, Ni<sub>4</sub>Mo<sub>12</sub>@Fe and Co<sub>4</sub>Mo<sub>12</sub>@Fe, have been successfully prepared via the encapsulation of POMs anions, [Mo<sup>V</sup><sub>12</sub>O<sub>30</sub>(<i>μ</i><sub>2</sub>-OH)<sub>10</sub>H<sub>2</sub>{Ni<sup>II</sup><sub>4</sub>(H<sub>2</sub>O)<sub>12</sub>}]∙14H<sub>2</sub>O (noted as Ni<sub>4</sub>Mo<sub>12</sub>) and [Mo<sup>V</sup><sub>12</sub>O<sub>30</sub>(<i>μ</i><sub>2</sub>-OH)<sub>10</sub> H<sub>2</sub>{Co<sup>II</sup>(H<sub>2</sub>O)<sub>3</sub>}<sub>4</sub>]∙12H<sub>2</sub>O (noted as Co<sub>4</sub>Mo<sub>12</sub>), into the cavities of MOFs NH<sub>2</sub>-MIL-101(Fe), respectively. Compared to each individual components, Ni<sub>4</sub>Mo<sub>12</sub>@Fe and Co<sub>4</sub>Mo<sub>12</sub>@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 Ni<sub>4</sub>Mo<sub>12</sub>@Fe and 352.64 mV for Co<sub>4</sub>Mo<sub>12</sub>@Fe at 10 mA cm<sup>−2</sup>. 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.</p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 3","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ChemCatChem","FirstCategoryId":"92","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cctc.202401594","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
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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, [MoV12O30(μ2-OH)10H2{NiII4(H2O)12}]∙14H2O (noted as Ni4Mo12) and [MoV12O30(μ2-OH)10 H2{CoII(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.
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.
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