Abstract
AbstractExpensive gold‐based catalysts are frequently used for electrochemical CO2 reduction into CO. A feasible approach to obtain low‐cost Au‐based catalysts is needed. Herein, a novel framework 1 assembled from [Zr48Ni6] nano‐cages is prepared. It exhibits a high BET surface area of 1569 m2 g−1 and high solvents/pH stability. 1 can not only selectively extract AuCl4− 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 CO2RR investigations revealed that the Au NPs@1‐3 displayed an excellent FECO 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 [Zr48Ni6] 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.
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