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协同钴-铜基双金属有机骨架纳米盒用于高效电化学析氧
作者:小柯机器人 发布时间:2021/10/21 16:17:58

新加坡南洋理工大学Xiong-Wen (David) Lou报道了协同钴-铜基双金属-有机骨架纳米盒用于高效电化学析氧。相关研究成果于2021年10月18日发表在《德国应用化学》。

开发高效的氧电催化剂并了解其潜在的催化机理对于高性能的能量转换和存储技术具有重要意义。

该文中,研究人员报道了新型CoCu基双金属有机骨架纳米盒(CoCu-MOF-NBs),作为通过连续阳离子和配体交换策略制备的高效电化学析氧反应(OER)的有希望的催化剂。凭借高度暴露的双金属中心和精心设计的结构,CoCu MOF NBs显示出优异的OER活性和稳定性,在10 mA cm-2时具有271 mV的小过电位,在300 mV的过电位下具有0.326 s-1的高翻转频率(TOF)值。

结合准原位X射线吸收精细结构光谱和密度泛函理论计算,研究人员认为OER过程中形成的CoCu基羟基氧化类似物可以解释CoCu MOF NBs的高OER活性,其中,Co和相邻Cu原子之间的电子协同作用促进O-O键耦合朝着快速OER动力学方向发展。

附:英文原文

Title: Synergetic Cobalt-Copper-Based Bimetal-Organic Framework Nanoboxes toward Efficient Electrochemical Oxygen Evolution

Author: Xiong-Wen (David) Lou

Issue&Volume: 2021-10-18

Abstract: The development of efficient oxygen electrocatalysts and understanding their underlying catalytic mechanism are of significant importance for the high-performance energy conversion and storage technologies. Herein, we report novel CoCu-based bimetal-organic framework nanoboxes (CoCu-MOF NBs) as promising catalysts toward efficient electrochemical oxygen evolution reaction (OER), fabricated via a successive cation and ligand exchange strategy. With the highly exposed bimetal centers and the well-designed architecture, the CoCu-MOF NBs show excellent OER activity and stability, with a small overpotential of 271 mV at 10 mA cm  -2  and a high turnover frequency (TOF) value of 0.326 s  -1  at an overpotential of 300 mV. In combination of quasi in-situ X-ray absorption fine structure spectroscopy and density-functional theory calculations, the post-formed CoCu-based oxyhydroxide analogue during OER is believed to account for the high OER activity of CoCu-MOF NBs, where the electronic synergy between Co and neighbouring Cu atoms promotes the O-O bond coupling toward fast OER kinetics.

DOI: 10.1002/anie.202112775

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202112775

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx