Critical to the feasibility of electrochemical reduction of waste NOx (NOxRR), as a sustainable pathway and to close the NOx cycle for the emerging NH3 economy, is the requirement of...

To save energy and decrease cost, it is essential to explore a low-temperature green process for the synthesis of electrode materials. We developed a facile onestep room-temperature strategy for the scalable fabrication of Na 3 (VOPO 4 ) 2 F (e.g., 150 g per patch). UV-vis spectra are first employed to investigate the chargetransfer feature during charge and discharge process. The as-synthesized product delivers superior rate capability and outstanding cycling stability: 81 mA hr g À1 and about 70% capacity retention after 3,000 cycles at 15-C rate.

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