南开大学赵斌团队开发了利用MOFs中的[Zr48Ni6]纳米笼从人造电子废弃物，获得低成本、高性能的将CO₂电还原为CO的金基催化剂的简便策略。相关研究成果于2022年10月11日发表于国际顶尖学术期刊《德国应用化学》。

昂贵的Au基催化剂经常被用于将CO₂RR电化学转化为CO，因此迫切需要探索一种可行的方法来获得低成本的Au系催化剂。

该文中，制备了由[Zr48Ni6]纳米笼组装的新型框架1，具有1569 m² g^-1的高BET表面积和高溶剂/pH稳定性。1不仅可以从人工电子废弃物中选择性富集AuCl₄，还可以进一步转化为低成本催化剂Au NPs@1x（Au NPs@1x，x=1，2，3，4），Au NPs尺寸可调。CO2RR研究表明，获得的AuNPs@13在1.1 V电压下，具有95.2%的优良FECO，电流密度为102.9 mA cm^-2，并且由于[Zr48Ni6]纳米笼的限制效应避免了金纳米粒子的团聚，因此这种高催化活性可以保持至少15 h而没有明显降低。

重要的是，该项工作为制备低成本和高性能的金基催化剂提供了一种简便的策略，用于金活化的各种反应。

附：英文原文

Title: A Facile Strategy to Obtain Low−Cost and High−Performance Gold−Based Catalysts from Artificial Electronic Waste by [Zr48Ni6] Nano−Cages in MOFs for CO2 Electroreduction to CO

Author: Zi-Hao Zhu, Ze-Long Liang, Zhuo-Hao Jiao, Xiao-Lei Jiang, Yao Xie, Hang Xu, Bin Zhao

Issue&Volume: 2022-10-11

Abstract: Expensive Aubased catalysts are frequently used for electrochemical CO2RR into CO, and it is urgent to explore a feasible approach to obtain lowcost Aubased catalysts. Herein, a novel framework 1 assembled by [Zr48Ni6] nanocages was prepared, exhibiting high BET surface area of 1569 m2 g1 and high solvents/pH stability. 1 can not only selectively enrich AuCl4 from artificial electronic waste, but also be further transformed into lowcost catalysts Au nanoparticles@1x (Au NPs@1x, x = 1, 2, 3, 4) with tunable Au NPs sizes. The CO2RR investigations revealed that the obtained Au NPs@13 displayed an excellent FECO of 95.2% with a current density of 102.9 mA cm2 at 1.1 V, and such high catalytic activity can keep at least 15 h without obvious decrease because the confinement effect of [Zr48Ni6] nanocages avoids Au NPs agglomeration. Importantly, this work offers a facile strategy to obtain lowcost and highperformance Aubased catalysts for various reactions activated by Au.

DOI: 10.1002/anie.202214243

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202214243