Redox effect of Fe2+/Fe3+ in iron phosphates for enhanced electrocatalytic activity in Li-O2 batteries

Iron-Based Theranostic Nanoplatform for Improving Chemodynamic Therapy of Cancer

“…Despite being promising, there are still some critical challenges for improving the therapeutic efficacy of the iron-based CDT theranostic nanoplatforms . For instance, abundance glutathione (GSH) produced by tumor would scavenge •OH and reduce oxidative stress. − Meanwhile, endogenous H 2 O 2 is insufficient to support continuous •OH production. − Additionally, insufficient acidity in TME directly results in low Fenton reaction rates catalyzed by iron-containing nanoparticles. , Last but not least, the electron transfer process from Fe 3+ to Fe 2+ is very slow (0.002–0.01 M –1 s –1 ), − which also hindered the efficiency of ROS production.…”

Photochemical construction of the ZnCdS/PO/FeCoNiPi–MnO composite for efficient tandem application of photocatalytic partial water splitting and overall water splitting

“…33 The P 2p XPS peaks of ZCS/PO/FCNPi–MO located at 133.1 and 133.9 eV are ascribed to the H 2 PO 2 − and PO 4 3− species (Fig. 4D), 39 respectively. As shown in Fig.…”

“…4E, the O 1s levels of ZCS/PO/FCNPi–MO show two signals; one for P–O species (∼532.8 eV) and another for transition metal–O species of Fe x Co y Ni z Pi and MnO a materials (∼531.4 eV). 39 The Fe 2p, Co 2p and Mn 2p 3/2 XPS peaks located at higher (713.2, 781.9 and 642.6 eV) and lower (710.8, 779.9 and 641.2 eV) binding energies (Fig. 4F, G and I) can be assigned to the 2+ and 3+ oxidation states of 2p 3/2 spectra, 39 respectively.…”

“…39 The Fe 2p, Co 2p and Mn 2p 3/2 XPS peaks located at higher (713.2, 781.9 and 642.6 eV) and lower (710.8, 779.9 and 641.2 eV) binding energies (Fig. 4F, G and I) can be assigned to the 2+ and 3+ oxidation states of 2p 3/2 spectra, 39 respectively. The Ni 2p 3/2 spectrum exhibits two peaks at 856.3 and 853.4 eV, respectively (Fig.…”

Iron pyrophosphate doped carbon nanocomposite for tetracycline degradation by activation of peroxymonosulfate

“…26,27 The divalent pyrophosphate, as a kind of phosphate, has been shown to not only act as a proton receptor to ensure the stability of the catalyst but also to induce structural distortions in the transition metals, thus facilitating the adsorption between the material and the contaminant. 28,29 Yang et al found in a previous study that pyrophosphate can accelerate the decomposition of PMS during its activation. 30 However, the specific mechanism has not been investigated.…”