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Sub‐3 nm Ultrafine Cu2O for Visible Light Driven Nitrogen Fixation
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-10-22 , DOI: 10.1002/anie.202013594 Shuai Zhang 1, 2 , Yunxuan Zhao 1 , Run Shi 1 , Chao Zhou 1 , Geoffrey I. N. Waterhouse 3 , Zhuan Wang 4 , Yuxiang Weng 4, 5, 6 , Tierui Zhang 1, 2
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-10-22 , DOI: 10.1002/anie.202013594 Shuai Zhang 1, 2 , Yunxuan Zhao 1 , Run Shi 1 , Chao Zhou 1 , Geoffrey I. N. Waterhouse 3 , Zhuan Wang 4 , Yuxiang Weng 4, 5, 6 , Tierui Zhang 1, 2
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Cu2O, a low‐cost, visible light responsive semiconductor photocatalyst represents an ideal candidate for visible light driven photocatalytic reduction of N2 to NH3 from the viewpoint of thermodynamics, but it remains unexplored. Reported here is the successful synthesis of uniformly sized and ultrafine Cu2O platelets, with a lateral size of <3 nm, by the in situ topotactic reduction of a CuII‐containing layered double hydroxide with ascorbic acid. The supported ultrafine Cu2O offered excellent performance and stability for the visible light driven photocatalytic reduction of N2 to NH3 (the Cu2O‐mass‐normalized rate as high as 4.10 mmol g
−1 h−1 at λ>400 nm), with the origin of the high activity being long‐lived photoexcited electrons in trap states, an abundance of exposed active sites, and the underlying support structure. This work guides the future design of ultrafine catalysts for NH3 synthesis and other applications.
中文翻译：
亚3 nm超细Cu2O，用于可见光驱动固氮
从热力学的角度来看，低成本的可见光响应型半导体光催化剂Cu 2 O代表了可见光驱动的将N 2还原为NH 3的光催化还原的理想选择，但尚未探索。此处报道的是，通过抗坏血酸原位电势还原含Cu II的层状双氢氧化物，成功合成了横向尺寸小于3 nm的均匀尺寸和超细的Cu 2 O血小板。负载的超细Cu 2 O为可见光驱动的N 2还原为NH 3（Cu 2O质量归一化率在λ > 400 nm时高达4.10 mmol g
-1 h -1），高活性的起源是处于陷阱态的长寿命光激发电子，大量暴露的活性位点以及基础支持结构。这项工作指导了用于NH 3合成和其他应用的超细催化剂的未来设计。
更新日期：2020-10-22
−1 h−1 at λ>400 nm), with the origin of the high activity being long‐lived photoexcited electrons in trap states, an abundance of exposed active sites, and the underlying support structure. This work guides the future design of ultrafine catalysts for NH3 synthesis and other applications.
中文翻译：
亚3 nm超细Cu2O，用于可见光驱动固氮
从热力学的角度来看，低成本的可见光响应型半导体光催化剂Cu 2 O代表了可见光驱动的将N 2还原为NH 3的光催化还原的理想选择，但尚未探索。此处报道的是，通过抗坏血酸原位电势还原含Cu II的层状双氢氧化物，成功合成了横向尺寸小于3 nm的均匀尺寸和超细的Cu 2 O血小板。负载的超细Cu 2 O为可见光驱动的N 2还原为NH 3（Cu 2O质量归一化率在λ > 400 nm时高达4.10 mmol g
-1 h -1），高活性的起源是处于陷阱态的长寿命光激发电子，大量暴露的活性位点以及基础支持结构。这项工作指导了用于NH 3合成和其他应用的超细催化剂的未来设计。
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