Rational Design of a N,S Co-Doped Supermicroporous CoFe-Organic Framework Platform for Water Oxidation.,ChemSusChem

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Rational Design of a N,S Co-Doped Supermicroporous CoFe-Organic Framework Platform for Water Oxidation.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-03-20 , DOI: 10.1002/cssc.202000376
Zhao-Qian Huang ₁ , Bin Wang ₁ , Dong-Sheng Pan ₁ , Ling-Li Zhou ₁ , Zheng-Han Guo ₁ , Jun-Ling Song ₁

Affiliation

It remains a challenge to rational design of a new metal-organic framework (MOF) as highly efficient direct electrocatalysts for the oxygen evolution reaction (OER). Herein, we developed a simple and effective method to explore a new pillared-layered MOF with syringic acid as a promising OER electrocatalyst. The isostructural mono-, heterobimetallic MOF and N,S co-doped MOF by mixing thiourea were quickly synthesized in a high yield under solvothermal condition. Moreover, the optimized N,S co-doped MOF exhibits the lowest overpotential of 254 mV at 10 mA cm-2 on a glass carbon electrode and a small Tafel slope of 50 mV dec-1 , especially, this catalyst also possesses long-term electrochemical durability for at least 16 h. According to the characterization, the incorporation of N and S atoms into this heterobimetallic CoFe-based MOF could modify its pore structure, tune the electronic structure, accordingly, improve the mass and electron transportation, and facilitate the formation of active species, as a consequence, the improved activity of this new N,S co-doped MOF for OER should be mainly be ascribed to higher electrochemical activation toward the active species via in situ surface modification during the OER process.

中文翻译：

用于水氧化的N，S共掺杂超微孔CoFe-有机骨架平台的合理设计。

合理设计新的金属有机框架（MOF）作为氧释放反应（OER）的高效直接电催化剂仍然是一个挑战。在这里，我们开发了一种简单有效的方法来探索一种新的具有丁香酸作为潜在的OER电催化剂的柱状MOF。在溶剂热条件下，高产率快速合成了通过混合硫脲的同构单，异双金属MOF和N，S共掺杂MOF。此外，优化的N，S共掺杂MOF在玻璃碳电极上的10 mA cm-2处表现出最低的254 mV过电势，以及50 mV dec-1的小Tafel斜率，特别是该催化剂还具有长期电化学耐久性至少16小时。根据特征，

更新日期：2020-03-20

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