Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries

Abstract

Enhancing bifunctionality of CoN nanowires by Mn doping for long-lasting Zn-air batteries. Science China Chemistry.

Modulating Oxygen Vacancies of TiO2 Nanospheres by Mn-Doping to Boost Electrocatalytic N2 Reduction

“…Compared with pristine TiO 2 , the Ti 2p 3/2 and Ti 2p 1/2 peaks of Mn-TiO 2 are positively shifted by 0.25 and 0.70 eV respectively, which is attributed to the lattice distortion of TiO 2 caused by the introduction of Mn. Mn 2p region of Mn-TiO 2 in Figure c shows the binding energies at 640.81 and 642.07 eV correspond to Mn 2p 3/2 , and at 652.54 and 653.35 eV correspond to Mn 2p 1/2 , revealing the presence of both Mn 3+ and Mn 4+ in the sample. − Deconvolution of the O 1s spectrum (Figure d) produces four main peaks located at 530.34, 531.86, 533.01, and 536.30 eV, which are assigned to the Ti–O bond, oxygen defects, hydroxyl groups (OH) and surface-adsorbed oxygen (O) species, respectively. − Therefore, these evidences demonstrate that V O and Ti 3+ defects are generated by doping Mn into TiO 2 .…”

The Passive Effect of MXene on Electrocatalysis: A Case of Ti3C2Tx/CoNi−MOF nanosheets for Oxygen Evolution Reaction

“…The linear sweep voltammetry (LSV) was performed to evaluate the OER activity of the as‐obtained CoNi−MOFNs and CoNi−MOFNs@MX nanocomposites. As shown in Figure 3a, Co−MOFNs reveals a small oxidation peak at 1.28 V vs RHE referring to the Co 2+ /Co 3+ redox couple [29–31] . While Ni−MOFNs reveals a broad oxidation peak at the potential window of 1.35∼1.50 V vs RHE referring to the Ni 2+ /Ni 3+ redox couple before the onset of OER, indicating a redox reaction mediated OER process [32–33] .…”

Scalable CNTs/NiCoSe2 Hybrid Films for Flexible All-Solid-State Asymmetric Supercapacitors

“…The booming market of smart wearable and integrated electronics, such as electronic skins, smart textiles, flexible displays, and personal health monitoring, has stimulated the demand for flexible energy storage devices. − SCs, as one of the commercial power sources, play an increasing significant role in wearable and integrated devices due to their exceptional power density and high cycle efficiency up to a million cycles. − It is well known that Faraday pseudocapacitors can provide much higher energy density than electric double-layer capacitors (EDLCs) due to different energy storage mechanisms. − In the past decades, lots of transition metal compounds have been widely exploited as pseudocapacitor materials to achieve high capacitive performance. However, poor electrical conductivity and low rate performance limit the full play of their theoretical capacitance .…”