Synthesis of Co/Ni-MOFs with mixed ligands and their Oxygen Evolution Reaction (OER) performance

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Structure Pub Date : 2024-11-07 DOI:10.1016/j.molstruc.2024.140549

Xuejiao Sun , Lei Yang , Dongmei Li , Zhongzhen Tian

引用次数: 0

Abstract

Two new transition metal–organic framework (MOF) complexes, Co-MOF (C₂₈H₁₇CoN₆O₉S₂) and Ni-MOF (C₂₈H₆NNi₈O₂S_0.06), were synthesized using a hydrothermal method. Upon characterization and analysis, Co-MOF and Ni-MOF showed similar structures, in which Co²⁺ or Ni²⁺ coordinated with two pyridine-2,6-dicarboxylic acid ligands to form octahedral geometric configurations, which in turn formed one-dimensional layered structure, while Py₂TTz ligands existed between these layers to enlarge the pore size of MOFs. Co-MOF showed superior performance than Ni-MOF in the OER process, with a low overpotential (227 mV) and Tafel slope (51.4 mV dec^‑1) at 10 mA cm^-2 current density. This work provided new insight into designing transition MOFs for electrocatalytic water splitting.

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具有混合配体的 Co/Ni-MOFs 的合成及其氧进化反应 (OER) 性能

采用水热法合成了两种新的过渡金属有机框架（MOF）配合物 Co-MOF（C28H17CoN6O9S2）和 Ni-MOF （C28H6NNi8O2S0.06）。经表征和分析，Co-MOF 和 Ni-MOF 显示出相似的结构，其中 Co2+ 或 Ni2+ 与两个吡啶-2,6-二羧酸配体配位形成八面体几何构型，进而形成一维层状结构，而 Py2TTz 配体则存在于这些层之间，以扩大 MOF 的孔径。在 10 mA cm-2 电流密度下，Co-MOF 的过电位（227 mV）和 Tafel 斜率（51.4 mV dec-1）均较低，在 OER 过程中表现出比 Ni-MOF 更优越的性能。这项工作为设计用于电催化水分离的过渡 MOF 提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

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