<br>聚[(2-甲基丙烯酰氧基)乙基]三甲基氯化铵负载的氧化钴纳米粒子作为有效析氧反应的活性电催化剂,Chemistry - An Asian Journal

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聚[(2-甲基丙烯酰氧基)乙基]三甲基氯化铵负载的氧化钴纳米粒子作为有效析氧反应的活性电催化剂
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2023-12-15 , DOI: 10.1002/asia.202301012
Santa Islam ₁ , S M Abu Nayem ₁ , Nasrin Sultana ₁ , Syed Shaheen Shah ₂ , Abdul Awal ₁ , Ahtisham Anjum ₃ , Mohammad A Jafar Mazumder _{4,

5} , M Nasiruzzaman Shaikh ₆ , Md Abdul Aziz ₆ , A J Saleh Ahammad ₁

Affiliation

为了应对清洁能源的能源危机，析氧反应（OER）对于在现实生活中实现电解氢燃料生产至关重要。在这里，遵循简单的化学合成途径，使用聚[(2-甲基丙烯酰氧基)乙基]三甲基氯化铵 (Co ₃ O ₄ NPs@PMTC) 作为支持物，在碱性 OER 工艺中制备四氧化钴纳米颗粒 (Co ₃ O ₄ NPs)，以防止聚合。在材料表征中，X射线衍射（XRD）图证实了合成的Co ₃ O ₄ NPs@PMTC的结晶度，拉曼光谱表明Co ₃ O ₄ NPs含有立方密排氧化物。形态分析揭示了由于折叠的纳米片阵列而均匀分布的皱纹状破坏。能量色散 X 射线光谱表明 Co ₃ O ₄纳米颗粒中存在大量钴原子，元素图谱分析表明了纳米颗粒的组成。在10 mA cm ^-2的电流密度下，在1.67 V的电压下释放氧气，产生440 mV的过电势。 Co ₃ O ₄ NPs@PMTC 的这种独特结构提供了有益的功能，可提供大量活性位点和快速释放氧气并具有长期稳定性。通过动力学研究，我们发现Tafel斜率为48.9 mV dec ^-1 ，这证明Co ₃ O ₄ NPs@PMTC的催化行为对OER过程很有前景。

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Poly[(2-methacryloyloxy)Ethyl]Trimethylammonium Chloride Supported Cobalt Oxide Nanoparticles as an Active Electrocatalyst for Efficient Oxygen Evolution Reaction

To combat with energy crisis considering clean energy, oxygen evolution reaction (OER) is crucial to implement electrolytic hydrogen fuel production in real life. Here, straightforward chemical synthesis pathways are followed to prepare cobalt tetraoxide nanoparticles (Co₃O₄NPs) in an alkaline OER process using poly[(2-methacryloyloxy)ethyl]trimethylammonium chloride (Co₃O₄NPs@PMTC) as support to prevent aggregation. In material characterization, the X-ray diffraction (XRD) pattern confirms the crystallinity of the synthesized Co₃O₄NPs@PMTC, and Raman spectroscopy indicates that the Co₃O₄NPs contain cubic close-packed oxides. The morphological analysis reveals the wrinkle-like disruption which is distributed evenly owing to the folded nanosheet arrays. Energy-dispersive X-ray spectroscopy indicates the presence of a significant number of cobalt atoms in the Co₃O₄NPs, and elemental mapping analysis demonstrates the composition of the NPs. At a current density of 10 mA cm⁻², oxygen is emitted at 1.67 V delivering an overpotential of 440 mV. This unique structure of Co₃O₄NPs@PMTC provides beneficial functions that are responsible for a large number of active sites and the rapid release of oxygen gas with long-term stability. Through kinetic study, we found a Tafel slope of 48.9 mV dec⁻¹ which proves the catalytic behavior of Co₃O₄NPs@PMTC is promising toward the OER process.

更新日期：2023-12-15

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