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Morphology control in the synthesis of [Mo3S13]2−/Co-MOF-74 composite catalysts and their application in the oxygen evolution reaction
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-03-31 , DOI: 10.1039/d3nj00887h
Jianxia Gu 1 , Jingting He 2 , Haiyan Zheng 2 , Chunyi Sun 2
Affiliation  

The novel composite electrocatalysts [Mo3S13]2−/Co-MOF-74 have been successfully prepared by using a simple solvothermal method. The morphology of composite catalysts can be effectively controlled by regulating the amount of [Mo3S13]2− because the addition of [Mo3S13]2 can affect the nucleation rate of Co-MOF-74. After the optimization, [Mo3S13]2−/Co-MOF-74 with spindle-like morphology displays remarkable OER electrocatalytic activity with a low overpotential (368 mV) to afford the current density of 10 mA cm−2 and a small Tafel slope of 90.6 mV dec−1, which is almost on a par with IrO2/C (358 mV, 89.1 mV dec−1). Besides, this composite catalyst can continuously work for about 17 h with almost negligible attenuation in current density. Such an excellent electrocatalytic OER performance of [Mo3S13]2−/Co-MOF-74 benefits from the good morphology obtained by the introduction of a moderate amount of [Mo3S13]2− as well as the synergistic effect between the [Mo3S13]2− and Co-MOF-74. This work provides new insight into the development of MOF-based electrocatalysts for the OER.

中文翻译:

[Mo3S13]2−/Co-MOF-74复合催化剂合成中的形貌控制及其在析氧反应中的应用

采用简单的溶剂热法成功制备了新型复合电催化剂[Mo 3 S 13 ] 2− /Co-MOF-74。通过调节[Mo 3 S 13 ] 2−的用量可以有效控制复合催化剂的形貌,因为[Mo 3 S 13 ] 2的添加会影响Co-MOF-74的成核速率。优化后,[Mo 3 S 13 ] 2− /Co-MOF-74 具有纺锤形形态,显示出显着的 OER 电催化活性和低过电位 (368 mV),可提供 10 mA cm -2 的电流密度以及 90.6 mV dec -1的小 Tafel 斜率,几乎与 IrO 2 /C(358 mV,89.1 mV dec -1)相当。此外,这种复合催化剂可以连续工作约17小时,电流密度的衰减几乎可以忽略不计。[Mo 3 S 13 ] 2− /Co-MOF-74如此优异的电催化 OER 性能得益于通过引入适量的 [Mo 3 S 13 ] 2−获得的良好形貌以及两者之间的协同效应[Mo 3 S 13 ] 2−和 Co-MOF-74。这项工作为基于 MOF 的 OER 电催化剂的开发提供了新的见解。
更新日期:2023-03-31
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