粗糙钼微电极上溶解二氧化碳的电还原,RSC Advances

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粗糙钼微电极上溶解二氧化碳的电还原
RSC Advances ( IF 3.9 ) Pub Date : 2023-11-08 , DOI: 10.1039/d3ra05592b
Siti Hajjar Yahya ₁ , Firas A Al-Lolage ₂ , Mohd Muzamir Mahat ₃ , Muhammad Zahir Ramli ₄ , Mohd Syamsul ₅ , Shaili Falina ₆ , Dania Adila Ahmad Ruzaidi ₇ , Wan Hazman Danial ₁ , Saiful Arifin Shafiee _{1,

4,

8,

9}

Affiliation

Department of Chemistry, Kulliyyah of Science, International Islamic University Malaysia Jalan Sultan Ahmad Shah, Bandar Indera Mahkota 25200 Kuantan Pahang Malaysia
Department of Chemistry, College of Science, University of Mosul Mosul 41002 Iraq.
Textile Research Group, Faculty of Applied Sciences, Universiti Teknologi MARA 40450 Shah Alam Selangor Malaysia.
Institute of Oceanography and Maritime Studies (INOCEM), Kulliyyah of Science, International Islamic University Malaysia Kampung Cherok Paloh 26060 Kuantan Pahang Malaysia.
Institute of Nano Optoelectronics Research and Technology (INOR), Universiti Sains Malaysia, Bayan Lepas 11900 Pulau Pinang Malaysia.
Collaborative Microelectronic Design Excellence Centre (CEDEC), Universiti Sains Malaysia, Bayan Lepas 11900 Pulau Pinang Malaysia.
School of Physics and Material Studies, Faculty of Applied Sciences, Universiti Teknologi MARA 40450 Shah Alam Selangor Malaysia.
IIUM Health, Safety, and Environment, Kulliyyah of Medicine, International Islamic University Malaysia Jalan Sultan Ahmad Shah, Bandar Indera Mahkota 25200 Kuantan Pahang Malaysia.
Sustainable Chemistry Research Group, Kulliyyah of Science, International Islamic University Malaysia, Jalan Sultan Ahmad Shah, Bandar Indera Mahkota 25200 Kuantan Pahang Malaysia.

大气中二氧化碳（CO _{2 ）含量的增加可能会溶解到海洋中并影响海洋生态系统。}_{确定海洋中溶解的CO 2}水平对于采取适当的缓解行动至关重要。传统的电极材料价格昂贵且容易受到氯离子的侵蚀。因此，需要寻找合适的替代材料。_{这项新颖的研究研究了溶解的CO 2}在粗糙化的钼（Mo）微盘电极上的电化学行为，该电极使用碳化硅纸进行了机械抛光。使用扫描电子显微镜观察电极表面可以看到凹坑和凹痕。X 射线衍射光谱证实电极表面不存在研磨材料且存在缺陷。粗糙电极的电化学表面高于平滑电极的电化学表面。_{我们的研究结果表明，对于溶解CO 2}的还原，粗糙电极表现出比平滑电极显着更高的电催化活性。我们的结果揭示了电流与扫描速率平方根之间的线性关系。此外，我们证明对于50 mL 溶液，使用仅20 分钟的鼓泡时间、5 L min ^-1的流速就足以用CO _{2饱和电解质溶液。}_{这项研究为溶解CO 2}在粗糙化Mo微盘电极上的电化学行为提供了新的见解，并强调了它们作为CO ₂还原和其他电化学应用的有前景材料的潜力。最终，我们的工作有助于减轻气候变化的影响并迈向可持续的未来。

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Electroreduction of dissolved carbon dioxide on roughened molybdenum microelectrodes

The increasing levels of carbon dioxide (CO₂) in the atmosphere may dissolve into the ocean and affect the marine ecosystem. It is crucial to determine the level of dissolved CO₂ in the ocean to enable suitable mitigation actions to be carried out. The conventional electrode materials are expensive and susceptible to chloride ion attack. Therefore, there is a need to find suitable alternative materials. This novel study investigates the electrochemical behaviour of dissolved CO₂ on roughened molybdenum (Mo) microdisk electrodes, which were mechanically polished using silicon carbide paper. Pits and dents can be seen on the electrode surface as observed using scanning electron microscopy. X-ray diffraction spectra confirm the absence of abrasive materials and the presence of defects on the electrode surface. The electrochemical surface for the roughened electrodes is higher than that for the smoothened electrodes. Our findings show that the roughened electrodes exhibit a significantly higher electrocatalytic activity than the smoothened electrodes for the reduction of dissolved CO₂. Our results reveal a linear relationship between the current and square root of scan rate. Furthermore, we demonstrate that saturating the electrolyte solution with CO₂ using a bubbling time of just 20 minutes at a flow rate of 5 L min⁻¹ for a 50 mL solution is sufficient. This study provides new insights into the electrochemical behaviour of dissolved CO₂ on roughened Mo microdisk electrodes and highlights their potential as a promising material for CO₂ reduction and other electrochemical applications. Ultimately, our work contributes to the ongoing efforts to mitigate the effects of climate change and move towards a sustainable future.

更新日期：2023-11-08

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