67201-98-3Relevant articles and documents
Construction of Donor–Acceptor Heterojunctions in Covalent Organic Framework for Enhanced CO2 Electroreduction
Wu, Qiao,Mao, Min-Jie,Wu, Qiu-Jin,Liang, Jun,Huang, Yuan-Biao,Cao, Rong
, (2021)
Covalent organic frameworks (COFs) are promising candidates for electrocatalytic reduction of carbon dioxide into valuable chemicals due to their porous crystalline structures and tunable single active sites, but the low conductivity leads to unmet current densities for commercial application. The challenge is to create conductive COFs for highly efficient electrocatalysis of carbon dioxide reduction reaction (CO2RR). Herein, a porphyrin-based COF containing donor–acceptor (D–A) heterojunctions, termed TT-Por(Co)-COF, is constructed from thieno[3,2-b]thiophene-2,5-dicarbaldehyde (TT) and 5,10,15,20-tetrakis(4-aminophenyl)-porphinatocobalt (Co-TAPP) via imine condensation reaction. Compared with COF-366-Co without TT, TT-Por(Co)-COF displays enhanced CO2RR performance to produce CO due to its favorable charge transfer capability from the electron donor TT moieties to the acceptor Co-porphyrin ring active center. The combination of strong charge transfer properties and enormous amount of accessible active sites in the 2D TT-Por(Co)-COF nanosheets results in good catalytic performance with a high Faradaic efficiency of CO (91.4%, ?0.6?V vs reversible hydrogen electrode (RHE) and larger partial current density of 7.28?mA cm?2 at ?0.7?V versus RHE in aqueous solution. The results demonstrate that integration of D–A heterojunctions in COF can facilitate the intramolecular electron transfer, and generate high current densities for CO2RR.
Intrinsic Activity of Metal Centers in Metal-Nitrogen-Carbon Single-Atom Catalysts for Hydrogen Peroxide Synthesis
Liu, Chang,Li, Hao,Liu, Fei,Chen, Junsheng,Yu, Zixun,Yuan, Ziwen,Wang, Chaojun,Zheng, Huiling,Henkelman, Graeme,Wei, Li,Chen, Yuan
, p. 21861 - 21871 (2020)
Metal-nitrogen-carbon (M-N-C) single-atom catalysts (SACs) show high catalytic activity for many important chemical reactions. However, an understanding of their intrinsic catalytic activity remains ambiguous because of the lack of well-defined atomic str
Two-dimensional porphyrin covalent organic frameworks with tunable catalytic active sites for the oxygen reduction reaction
Yue, Jie-Yu,Wang, Yu-Tong,Wu, Xin,Yang, Peng,Ma, Yu,Liu, Xuan-He,Tang, Bo
supporting information, p. 12619 - 12622 (2021/12/07)
Four novel two-dimensional porphyrin COFs (M-TP-COF, M = H2, Co, Ni and Mn) with donor-acceptor dyads were fabricated and served as electrocatalysts for the oxygen reduction reaction (ORR). The ORR catalytic activity of M-TP-COF was tuned by changing the