Constructing azobenzene-decorated Ni-MOF toward efficient oxygen evolution reaction,Chemical Engineering Journal

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Constructing azobenzene-decorated Ni-MOF toward efficient oxygen evolution reaction
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2024-12-19 , DOI: 10.1016/j.cej.2024.158779
Mingbiao Luo, Xingyu Liu, Liu Yang, Zhenzhen Xu, Yuan Tao, Qingsheng Huang, Sijia Lv, Peiyan Bi, Zhi Gao

Swithcing MOFs configuration utilizating external stimulus to promote the electrocatalytic oxygen evolution reaction (OER) is highly desired but remaines huge challenge. Here, the azobenzene-decorated Ni-MIL-53-azo is elaborately synthesized to successfully achieve this goal for the first time. Electrocatalytic results indicate that the OER activity can be significantly enhanced by the trans-to-cis isomerization of azobenzene in Ni-MIL-53-azo achieved upon UV light irradiation. Compared to Ni-MIL-53-azo (trans), Ni-MIL-53-azo (cis) shows the 36 times improvement of TOF. Interestingly, Ni-MIL-53-azo (trans) with poor activity can be reversiblely switched to Ni-MIL-53-azo (cis) with excellent activity, which is ascribed to the reversible isomerization of azobenzene group in Ni-MIL-53-azo. As demonstrated by the theoretical computation, Ni-MIL-53-azo (cis) can exhibit the stronger absorption strength toward *OH than Ni-MIL-53-azo (trans), thus effecitvely triggering OER process. This intriguing adjustment of OER activity stimulated by light irradiation may give new insight into highly efficient OER electrocatalysts.

更新日期：2024-12-20

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