氧化钨纳米线上的孤立钴中心可作为高效一氧化碳光还原反应的开关。
Isolated Cobalt Centers on WO Nanowires Perform as a Reaction Switch for Efficient CO Photoreduction.
作者信息
Zhang Huabin, Wang Yan, Zuo Shouwei, Zhou Wei, Zhang Jing, Lou Xiong Wen David
机构信息
School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
出版信息
J Am Chem Soc. 2021 Feb 10;143(5):2173-2177. doi: 10.1021/jacs.0c08409. Epub 2021 Jan 28.
Isolated cobalt atoms have been successfully decorated onto the surface of WO ultrathin nanowires. The Co-atom-decorated WO nanowires (WO@Co) greatly accelerate the charge carrier separation and electron transport in the catalytic system. Moreover, the surface decoration with Co atoms modifies the energy configuration of the WO@Co hybrid and thus boosts the redox capability of photoexcited electrons for CO reduction. The decorated Co atoms work as the real active sites and, perhaps more importantly, perform as a reaction switch to enable the reaction to proceed. The optimized catalyst delivers considerable activity for photocatalytic CO reduction, yielding an impressive CO generation rate of 21.18 mmol g h.
孤立的钴原子已成功修饰在WO超薄纳米线表面。钴原子修饰的WO纳米线（WO@Co）极大地加速了催化体系中的电荷载流子分离和电子传输。此外，钴原子的表面修饰改变了WO@Co杂化物的能量构型，从而增强了光激发电子用于CO还原的氧化还原能力。修饰的钴原子作为真正的活性位点，也许更重要的是，充当反应开关以使反应能够进行。优化后的催化剂在光催化CO还原方面具有相当高的活性，产生了令人印象深刻的21.18 mmol g⁻¹ h⁻¹的CO生成速率。
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