石墨二炔@Janus磁鐵礦用於光催化固氮
作者:
小柯機器人發布時間:2020/10/29 13:28:45
石墨二炔@Janus磁鐵礦用於光催化固氮,這一成果由中國科學院化學研究所Yuliang Li研究團隊經過不懈努力而取得。 相關論文於2020年10月27日發表在國際學術期刊《德國應用化學》上。
研究人員設計並製造了一個具有高活性的石墨二炔異質結與高效的光催化相結合。該催化劑在光催化合成氨反應上表現出轉化性能。這種優異的性能是由於石墨二炔含有Fe位點特定的磁鐵礦,從而導致催化劑中的價態轉變。結果顯示石墨二炔在有效調節磁鐵礦活性和配位環境上的強大優勢,同時揭示了磁鐵礦可以選擇性地形成兩種不同價態的四面體配位Fe和八面體配位Fe。
該催化劑對光催化合成氨表現出顯著的催化性能,表現出優異的轉化光催化活性,氨產率(YNH3)達到前所未有的1762.35±153.71 μmol h-1 gcat -1(最高可達1916.06 μmol h-1 gcat -1)。這項工作充分利用了石墨二炔的結構和性質特點,在催化領域為光催化開闢了一個新的方向。
附:英文原文
Title: Graphdiyne@Janus Magnetite for Photocatalysis Nitrogen Fixation
Author: Yuliang Li, Yan Fang, Yurui Xue, Lan Hui, Huidi Yu
Issue&Volume:
Abstract: A highly active graphdiyne heterojunction integrated with high‐efficiency photocatalysis is designed and fabricated. This catalyst demonstrates transformative properties on photocatalysis for ammonia synthesis. Such excellent properties are reigned from graphdiyne incorporating Fe site‐specific magnetite resulting in a valence state transition within the catalyst. Our results show the strong advantages of graphdiyne in effectively regulating magnetite activity and coordination environments and also indicate that magnetite can selectively form two different valence tetrahedral coordination Fe and octahedral coordination Fe. The catalysts show remarkable catalytic performance for ammonia synthesis by photocatalysis, indicating transformative photocatalytic activity with an ammonia yield (Y NH3 ) of unprecedented level of 1762.35 ± 153.71 μmol h ‐1 g cat. ‐1 (the highest Y NH3 could reach up to 1916.06 μmol h ‐1 g cat. ‐1 ). This work makes full use of the structural and property features of graphdiyne and opens up a new direction for photocatalysis in the field of catalysis.
DOI: 10.1002/anie.202012357
Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202012357