Meena Abhishek, Ahmed Abu Talha Aqueel, Singh Aditya Narayan, Sree Vijaya Gopalan, Im Hyunsik, Cho Sangeun
Division of System Semiconductor, College of AI Convergence, Dongguk University, Seoul 04620, Republic of Korea.
Department of Energy and Materials Engineering, Dongguk University, Seoul 04620, Republic of Korea.
Nanomaterials (Basel). 2024 Aug 24;14(17):1384. doi: 10.3390/nano14171384.
Developing effective and long-lasting electrocatalysts for oxygen evolution reaction (OER) is critical for increasing sustainable hydrogen production. This paper describes the production and characterization of CoFeP nanoparticles (CFP NPs) as high-performance electrocatalysts for OER. The CFP NPs were produced using a simple hydrothermal technique followed by phosphorization, yielding an amorphous/crystalline composite structure with improved electrochemical characteristics. Our results reveal that CFP NPs have a surprisingly low overpotential of 284 mV at a current density of 100 mA cm, greatly exceeding the precursor CoFe oxide/hydroxide (CFO NPs) and the commercial RuO catalyst. Furthermore, CFP NPs demonstrate exceptional stability, retaining a constant performance after 70 h of continuous operation. Post-OER characterization analysis revealed transformations in the catalyst, including the formation of cobalt-iron oxides/oxyhydroxides. Despite these changes, CFP NPs showed superior long-term stability compared to native metal oxides/oxyhydroxides, likely due to enhanced surface roughness and increased active sites. This study proposes a viable strategy for designing low-cost, non-precious metal-based OER catalysts, which will help advance sustainable energy technology.
开发用于析氧反应（OER）的高效且持久的电催化剂对于提高可持续制氢至关重要。本文描述了作为OER高性能电催化剂的CoFeP纳米颗粒（CFP NPs）的制备与表征。CFP NPs采用简单的水热技术制备，随后进行磷化处理，得到具有改善的电化学特性的非晶/晶体复合结构。我们的结果表明，CFP NPs在电流密度为100 mA cm时具有令人惊讶的低过电位284 mV，大大超过了前驱体CoFe氧化物/氢氧化物（CFO NPs）和商业RuO催化剂。此外，CFP NPs表现出卓越的稳定性，在连续运行70小时后仍保持恒定性能。OER后表征分析揭示了催化剂中的转变，包括钴铁氧化物/羟基氧化物的形成。尽管有这些变化，但与天然金属氧化物/羟基氧化物相比，CFP NPs表现出优异的长期稳定性，这可能归因于表面粗糙度的增加和活性位点的增多。本研究提出了一种设计低成本、非贵金属基OER催化剂的可行策略，这将有助于推动可持续能源技术的发展。
