Chinese dumpling-like NaTi₂(PO₄)₃/MXene@reduced graphene oxide for capacitive deionization with high capacity and good cycling stability

Abstract

Capacitive deionization (CDI) has been emerged as potential energy-efficient desalination technique to provide fresh water from brine, and the rational design of deionization electrode remains a challenge. Cation insertion materials...

Enhanced redox kinetics of Prussian blue analogues for superior electrochemical deionization performance

“…Overall, the modified redox kinetics and improved integrity of the electrode endow the target Mn–NiHCF/ppy-2 with improved charge transfer and enhanced desalination performance. 69…”

“…Noting that the excess loading of NiHCF (Mn–NiHCF/ppy-3) displays inferiority on both SAC and retention compared with Mn–NiHCF/ppy-2, which can be ascribed to the fact that a large amount of NiHCF on ppy may restrict the migration of Na + , resulting in increased electrochemical polarization. 69…”

“…Noting that the excess loading of NiHCF (Mn-NiHCF/ppy-3) displays inferiority on both SAC and retention compared with Mn-NiHCF/ppy-2, which can be ascribed to the fact that a large amount of NiHCF on ppy may restrict the migration of Na + , resulting in increased electrochemical polarization. 69 To highlight the advantages of Mn-NiHCF/ppy-2 for other NiHCF-based electrodes in this work, a detailed comparison of electrochemical and desalination performance (Fig. 7c) demonstrates that the Mn-NiHCF/ppy-2 shows the superiorities on specific capacitance, capacitive contribution, SAC, SAC retention after 50 cycles, and charge efficiency over the other NiHCF electrodes.…”

“…Overall, the modified redox kinetics and improved integrity of the electrode endow the target Mn-NiHCF/ppy-2 with improved charge transfer and enhanced desalination performance. 69 To reveal the potential for practical application of the asfabricated CDI cell, the desalination performance under various voltages and feed concentrations was evaluated. Fig.…”

High-efficiency purification of CH4 and H2 energy sources enabled by a phosphotungstic acid-supported Os single-atom catalyst

“…In this work, we performed systematic DFT computations to evaluate the feasibility of maintaining the dual dissociative O 2 species ( d O 2 ) over a range of M 1 /PTA SACs (M = Mn, Fe, Co, Ni, Ru, Rh, Pd, Re, Os, Ir, and Pt) in gas and 12 commonly used solvents including THF, 48 water, CCl 4 , PhH (Ph = –C 6 H 5 ), PhCl, PhMe, acetone (ACE), MeOH, EtOH, MeCN, dimethyl sulfoxide (DMSO) and CHCl 3 , aiming at developing a generally viable strategy for CH 4 and H 2 purification. Our computational results show that the high activity of dual ROS can be maintained in Re 1 /PTA and Os 1 /PTA SACs across all tested cases.…”