标题：Support-free 3D hierarchical nanoporous Cu@Cu2O for fast tandem ammonia borane dehydrogenation and nitroarenes hydrogenation under mild conditions
作者：Du, Jialei ;Hou, Jiagang ;Li, Bing ;Qin, Rong ;Xu, Caixia ;Liu, Hong
作者机构：[Du, Jialei ;Li, Bing ;Qin, Rong ;Xu, Caixia ;Liu, Hong ] Institute for Advanced Interdisciplinary Research (iAIR), Collaborative Innovation Center of 更多
来源：Journal of Alloys and Compounds
摘要：A support-free hierarchical nanoporous (NP) Cu@Cu2O composite is easily fabricated by dealloying Cu5Al95 alloy in dilute NaOH solution. This bulk material has a support-free spongy structure composed of three-dimensional interconnected ligaments and open pore channels with multimodal pore size distributions. The NP-Cu@Cu2O catalyst exhibits high activity, good chemoselectivity, and excellent recyclability toward one-pot transfer hydrogenation reactions of diverse nitroarenes to anilines. NP-Cu@Cu2O can effectively activate ammonia borane under mild conditions and complete the transfer hydrogenation reactions with high yields within a short time period of 5 min Cu2O formed at the nanoporous surface is proposed to be the actual active site causing this advanced performance. The main reaction intermediates were successfully separated and characterized, and a plausible condensation mechanism has been proposed for nitro reduction.
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