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研究金属（M = 锰、铁和镍）掺杂的氢氧化钴纳米纤维的电催化析氧及电化学生物传感性能。

Investigating metal (M = Mn, Fe, and Ni)-doped Co(OH) nanofibers for electrocatalytic oxygen evolution and electrochemical biosensing performance.

作者信息

Fareed Iqra, Khan Muhammad Danish, Murtaza Sadia, Hassan Farooq Masood Ul, Rehman Zia Ur, Farooq Muhammad Umer, Butt Faheem K, Tahir Muhammad

机构信息

Laboratory of Eco-Materials and Sustainable Technology (LEMST), Natural Sciences and Humanities Department New Campus, UET Lahore 54890 Pakistan.

Department of Physics, University of Engineering and Technology Lahore 54890 Pakistan.

出版信息

RSC Adv. 2024 Aug 22;14(36):26556-26567. doi: 10.1039/d4ra04240a. eCollection 2024 Aug 16.

DOI:10.1039/d4ra04240a
PMID:39175682
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11339775/
Abstract

To achieve efficient and cost-effective electrochemical water splitting, highly active and affordable nanostructured catalysts are the key requirement. The current study presents the investigations of the efficacy of metal (Mn, Fe and Ni)-doped Co(OH) nanofibers towards oxygen evolution water splitting. Notably, Ni-doped Co(OH) demonstrates superior OER performance in KOH electrolyte, surpassing standard IrO with a modest potential of 1.62 V at 10 mA cm. The remarkable activity is attributed to the nanofiber structure, facilitating faster conduction and offering readily available active sites. Ni-doped Co(OH) nanofibers displayed enduring stability even after 1000 cycles. This work underscores the importance of transition-metal based catalysts as effective electrocatalysts, providing the groundwork for the development of cutting-edge catalysts. Additionally, the electrochemical sensing capability towards ascorbic acid is evaluated, with Ni-doped Co(OH) showing the most promising response, characterized by the lowest LOD and LOQ values. These findings highlight the potential of Ni-doped Co(OH) nanofibers for upcoming diagnostic detection devices.

摘要

为实现高效且经济高效的电化学水分解，高活性且价格合理的纳米结构催化剂是关键要求。当前研究展示了金属（锰、铁和镍）掺杂的氢氧化钴纳米纤维对析氧水分解的功效研究。值得注意的是，镍掺杂的氢氧化钴在氢氧化钾电解质中表现出卓越的析氧反应性能，在10 mA cm时以1.62 V的适度电位超过了标准的氧化铱。这种显著的活性归因于纳米纤维结构，它促进了更快的传导并提供了易于利用的活性位点。镍掺杂的氢氧化钴纳米纤维即使在1000次循环后仍表现出持久的稳定性。这项工作强调了基于过渡金属的催化剂作为有效电催化剂的重要性，为前沿催化剂的开发奠定了基础。此外，评估了对抗坏血酸的电化学传感能力，镍掺杂的氢氧化钴显示出最有前景的响应，其特征在于最低的检测限和定量限数值。这些发现突出了镍掺杂的氢氧化钴纳米纤维在即将到来的诊断检测设备中的潜力。

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