Metal Hydroxide Salt Monolayer Nanoparticles: Synthesis, Redox Characterization, and Electrochemical Catalytic Performance
Metal Hydroxide Salt Monolayer Nanoparticles: Synthesis, Redox Characterization, and Electrochemical Catalytic Performance
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DOI：
10.1021/acsmaterialslett.2c00411
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发表时间：
2022-07-05
影响因子：
11.4
通讯作者：
Inumaru, Kei
中科院分区：
文献类型：
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作者：
Tarutani, Naoki;Kimura, Sota;Inumaru, Kei
已知用低分子量物质改性的二维材料显示出独特的电子性质。在本研究中，我们专注于合成和电化学研究的金属氢氧化物盐单层纳米粒子修饰不同的分子，以改善电化学功能。以烷基羧酸盐为原料，通过环氧树脂碱化法成功制备了纳米氢氧化镍羧酸盐。结果发现，单层纳米粒子的大小约为2 nm的形成直接从离子前体或超声后处理。锰、铁和钴氢氧化物碳酸盐被发现通过相同的程序形成单层纳米颗粒。合成的碳酸氢镍单层纳米粒子与短的烷基羧酸盐表现出增强的氧化还原过程和电化学功能，由于更高的质子扩散系数，更低的电子转移电阻，并提高了固有的催化活性。我们建议，在这项研究中获得的结果将提供一种新的设计策略，金属氢氧化物单层纳米颗粒催化剂走向高功能。
Two-dimensional materials modified with low molecular weight species are known to show unique electronic properties. In this study, we focus on the synthesis and electrochemical investigation of metal hydroxide salt monolayer nanoparticles modified with different molecules toward improved electrochemical functions. Nickel hydroxide carboxylate nanoparticles were successfully prepared through the epoxide-mediated alkalinization method using alkylcarboxylates. It was found that the monolayer nanoparticles with a size of approximately 2 nm were formed directly from an ionic precursor or after ultrasonication post-treatment. Manganese, iron, and cobalt hydroxide carbonates were found to form monolayer nanoparticles through the same procedure. Synthesized nickel hydroxide carbonate monolayer nanoparticles with a short alkylcarboxylate showed enhanced redox processes and electrochemical functions due to higher proton diffusion coefficient, lower electron transfer resistance, and improved intrinsic catalytic activity. We propose that the results obtained in this study will provide a novel design strategy for metal hydroxide monolayer nanoparticulate catalysts toward high functionality.