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首页> 外文期刊>ACS applied materials & interfaces >Trash to Treasure: Waste Eggshells as Chemical Reactors for the Synthesis of Amorphous Co(OH)(2) Nanorod Arrays on Various Substrates for Applications in Rechargeable Alkaline Batteries and Electrocatalysis
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Trash to Treasure: Waste Eggshells as Chemical Reactors for the Synthesis of Amorphous Co(OH)(2) Nanorod Arrays on Various Substrates for Applications in Rechargeable Alkaline Batteries and Electrocatalysis

机译：垃圾到宝藏：废蛋壳作为化学反应器，用于合成非晶CO（OH）（2）纳米棒阵列，用于在可充电碱性电池和电殖分析中的应用

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摘要

Bioinspired synthesis has been attracting much attention. Here, we demonstrate a novel approach to directly use waste eggshells as a reactor system for controlled synthesis of nanostructures formed on different substrates. This approach can recycle and transform the "trash" of waste eggshells into "treasure" of unique reactor systems for nanofabrication. The eggshell reactor system can provide unique conditions for the formation of nanostructures on various substrates. Using Co(OH)(2) as a model, amorphous Co(OH)(2) nanorod arrays, which cannot be synthesized conventionally by direct mixing of precursors, have been successfully formed on various substrates, including Ni foam, metal foil, and glass. To illustrate their potential applications, we use the as-fabricated amorphous Co(OH)(2) nanorod arrays on Ni foam as (1) binder-free electrodes for rechargeable alkaline batteries, demonstrating impressively good electrochemical performances, and (2) electrocatalyst for oxygen evolution reaction, demonstrating improved electrocatalytic performances as compared to their crystalline counterpart. We believe the idea outlined here, using eggshell reactor system, can be further expanded to synthesize many different functional materials and precursors which can find additional applications, including self-cleaning, catalysis, sensor, electrochromic devices, etc.
机译：Bioinspired合成一直引起了很多关注。在这里，我们证明了一种新的方法，可以直接使用废蛋壳作为用于控制在不同基材上形成的纳米结构的合成的反应器系统。这种方法可以回收和将废蛋壳的“垃圾”变成纳米制备的独特反应器系统的“宝藏”。蛋壳反应器系统可以为在各种基材上形成纳米结构提供独特的条件。使用CO（OH）（2）作为模型，通过直接混合前体的直接混合在各种衬底上成功地形成了不能通过常规合成的非晶CO（OH）（2）纳米峰阵列，包括Ni泡沫，金属箔和玻璃。为了说明其潜在的应用，我们使用Ni泡沫的AS制造的非晶CO（OH）（2）纳米峰阵列为（1）可充电碱性电池的无粘合剂电极，令人印象深刻的良好电化学性能，以及（2）电催化剂与其结晶对应物相比，氧气进化反应显示出改善的电催化性能。我们认为这里概述的想法可以进一步扩展以合成许多不同的功能材料和前体，可以找到额外的应用，包括自清洁，催化，传感器，电致变色器件等。

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