A Facile Strategy to Obtain Low‐Cost and High‐Performance Gold‐Based Catalysts from Artificial Electronic Waste by [Zr<sub>48</sub>Ni<sub>6</sub>] Nano‐Cages in MOFs for CO<sub>2</sub> Electroreduction to CO
Zihao Zhu, Ze‐Long Liang, Zhuo‐Hao Jiao, Xiao‐Lei Jiang, Yao Xie, Hang Xu, Bin Zhao
Abstract
Abstract Expensive gold‐based catalysts are frequently used for electrochemical CO 2 reduction into CO. A feasible approach to obtain low‐cost Au‐based catalysts is needed. Herein, a novel framework 1 assembled from [Zr 48 Ni 6 ] nano‐cages is prepared. It exhibits a high BET surface area of 1569 m 2 g −1 and high solvents/pH stability. 1 can not only selectively extract AuCl 4 − from artificial electronic waste, but can then be transformed into low‐cost catalyst Au nanoparticle@ 1 ‐ x (Au NPs@ 1 ‐ x , x =1, 2, 3, 4) with tuneable Au NPs sizes. The CO 2 RR investigations revealed that the Au NPs@ 1 ‐3 displayed an excellent FE CO of 95.2 % with a current density of 102.9 mA cm −2 at −1.1 V, and such high catalytic activity can be maintained for at least 15 h without obvious decrease because the confinement effect of [Zr 48 Ni 6 ] nano‐cages prevents Au NPs agglomeration. This work offers a facile strategy to obtain low‐cost and high‐performance Au‐based catalysts for various reactions activated by Au.