NiCo(OH)<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as a Heterogeneous Catalyst for the Electrooxidation of 5-Hydroxymethylfurfural
The electrochemical oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) coupled with water electrolysis for green hydrogen production is a promising strategy to address energy crises and environmental pollution. Despite the suitable adsorption energy for HMF due to their partially filled d-ba...
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MDPI AG
2025-06-01
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| Series: | Inorganics |
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| author | Wen Li Di Yin Wanxin Liu Yi Li Yijin Wu |
| author_facet | Wen Li Di Yin Wanxin Liu Yi Li Yijin Wu |
| author_sort | Wen Li |
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| description | The electrochemical oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) coupled with water electrolysis for green hydrogen production is a promising strategy to address energy crises and environmental pollution. Despite the suitable adsorption energy for HMF due to their partially filled d-band electronic structures, Ni- or Co-based oxides/hydroxides still face challenges in insufficient activity and stability. In this study, a porous heterogeneous nickel cobalt oxide/hydroxide growth on nickel foam (NF), which is defined as NF@NiCo-H/O, was developed via immersion in concentrated alkali solution. Compared with the single-component NiCo oxides, the NF@NiCo-H/O catalyst exhibits a lower application potential of only 1.317 V, 1.395 V, and 1.443 V to achieve current densities of 20, 50, and 100 mA cm<sup>−2</sup>, respectively, in an alkaline solution containing HMF. Additionally, it demonstrates rapid reaction kinetics with a Tafel slope of 27.6 mV dec<sup>−1</sup> and excellent cycling stability. Importantly, the presence of more high-valent Ni<sup>3+</sup>-O species on the catalyst surface contributes to its exceptional selectivity for 2,5-furandicarboxylic acid (86.7%), Faradaic efficiency (93.1%), and conversion rate (94.4%). This catalyst provides some theoretical guidance for the development of biomass electrooxidation catalysts for sustainable energy and chemical production. |
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| spelling | doaj-art-944c98d14d8e48fbb53e63a0e5ab9ab42025-07-25T13:25:23ZengMDPI AGInorganics2304-67402025-06-0113721110.3390/inorganics13070211NiCo(OH)<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as a Heterogeneous Catalyst for the Electrooxidation of 5-HydroxymethylfurfuralWen Li0Di Yin1Wanxin Liu2Yi Li3Yijin Wu4Hunan Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of XiangJiang River, Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, College of Chemistry and Material Science, Hengyang Normal University, Hengyang 421001, ChinaHunan Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of XiangJiang River, Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, College of Chemistry and Material Science, Hengyang Normal University, Hengyang 421001, ChinaHunan Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of XiangJiang River, Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, College of Chemistry and Material Science, Hengyang Normal University, Hengyang 421001, ChinaHunan Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of XiangJiang River, Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, College of Chemistry and Material Science, Hengyang Normal University, Hengyang 421001, ChinaHunan Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of XiangJiang River, Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, College of Chemistry and Material Science, Hengyang Normal University, Hengyang 421001, ChinaThe electrochemical oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) coupled with water electrolysis for green hydrogen production is a promising strategy to address energy crises and environmental pollution. Despite the suitable adsorption energy for HMF due to their partially filled d-band electronic structures, Ni- or Co-based oxides/hydroxides still face challenges in insufficient activity and stability. In this study, a porous heterogeneous nickel cobalt oxide/hydroxide growth on nickel foam (NF), which is defined as NF@NiCo-H/O, was developed via immersion in concentrated alkali solution. Compared with the single-component NiCo oxides, the NF@NiCo-H/O catalyst exhibits a lower application potential of only 1.317 V, 1.395 V, and 1.443 V to achieve current densities of 20, 50, and 100 mA cm<sup>−2</sup>, respectively, in an alkaline solution containing HMF. Additionally, it demonstrates rapid reaction kinetics with a Tafel slope of 27.6 mV dec<sup>−1</sup> and excellent cycling stability. Importantly, the presence of more high-valent Ni<sup>3+</sup>-O species on the catalyst surface contributes to its exceptional selectivity for 2,5-furandicarboxylic acid (86.7%), Faradaic efficiency (93.1%), and conversion rate (94.4%). This catalyst provides some theoretical guidance for the development of biomass electrooxidation catalysts for sustainable energy and chemical production.https://www.mdpi.com/2304-6740/13/7/2115-hydroxymethylfurfuralheterogeneous catalystnickel–cobalt compoundselectrochemical performanceactive species |
| spellingShingle | Wen Li Di Yin Wanxin Liu Yi Li Yijin Wu NiCo(OH)<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as a Heterogeneous Catalyst for the Electrooxidation of 5-Hydroxymethylfurfural Inorganics 5-hydroxymethylfurfural heterogeneous catalyst nickel–cobalt compounds electrochemical performance active species |
| title | NiCo(OH)<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as a Heterogeneous Catalyst for the Electrooxidation of 5-Hydroxymethylfurfural |
| title_full | NiCo(OH)<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as a Heterogeneous Catalyst for the Electrooxidation of 5-Hydroxymethylfurfural |
| title_fullStr | NiCo(OH)<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as a Heterogeneous Catalyst for the Electrooxidation of 5-Hydroxymethylfurfural |
| title_full_unstemmed | NiCo(OH)<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as a Heterogeneous Catalyst for the Electrooxidation of 5-Hydroxymethylfurfural |
| title_short | NiCo(OH)<sub>2</sub>/NiCo<sub>2</sub>O<sub>4</sub> as a Heterogeneous Catalyst for the Electrooxidation of 5-Hydroxymethylfurfural |
| title_sort | nico oh sub 2 sub nico sub 2 sub o sub 4 sub as a heterogeneous catalyst for the electrooxidation of 5 hydroxymethylfurfural |
| topic | 5-hydroxymethylfurfural heterogeneous catalyst nickel–cobalt compounds electrochemical performance active species |
| url | https://www.mdpi.com/2304-6740/13/7/211 |
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