Preparation of (Ga0.2Cr0.2Mn0.2Ni0.2Zn0.2)3O4 high-entropy oxide with narrow bandgap for photocatalytic CO2 reduction with water vapor

An Industrially Applicable Passivation Strategy for Significantly Improving Cyclability of Zinc Metal Anodes in Aqueous Batteries

“…The rate performances of Zn||Zn symmetric batteries with pristine Zn or TCCF@Zn electrodes were evaluated at different current densities. The symmetric TCCF@Zn||TCCF@Zn battery shows a voltage hysteresis of 22,23,25,35,48, and 62 mV under 0.5, 1, 2, 4, 6, and 12 mA cm −2 , respectively (Figure 4e). The voltage hysteresis returns to 17 mV once the corresponding current density reverts to 0.5 mA cm −2 , demonstrating the outstanding stability of the TCCF@Zn electrode.…”

“…Within the deconvoluted high‐resolution Cr 2p 3/2 spectrum (Figure 1e), a group of fitting peaks located at 573.8, 576.4, 577.3, 578.3, and 579.2 eV is attributed to Cr(III)–O species whereas a fitting peak centered at 578.1 eV is attributed to Cr(III)–OH species. [ 47,48 ] The asymmetric O 1s spectrum was split into two peaks at 530.2 and 531.5 eV (Figure 1f), which were attributed to the O 2− species present in the Cr─O and Cr─OH bonds, respectively. [ 48 ] Therefore, the abovementioned XRD and XPS analyses verify that the TCCF are not composed by toxic Cr(VI) compounds but by native Cr(III) oxides, namely, a mixture of Cr 2 O 3 and CrO(OH).…”

“…[ 47,48 ] The asymmetric O 1s spectrum was split into two peaks at 530.2 and 531.5 eV (Figure 1f), which were attributed to the O 2− species present in the Cr─O and Cr─OH bonds, respectively. [ 48 ] Therefore, the abovementioned XRD and XPS analyses verify that the TCCF are not composed by toxic Cr(VI) compounds but by native Cr(III) oxides, namely, a mixture of Cr 2 O 3 and CrO(OH). The as‐deposited TCCF on the ZMAs abide by a well‐accepted formation mechanism previously reported in the literature.…”

Insights and Progress on Photocatalytic and Photoelectrocatalytic Reactor Configurations and Materials for CO2 Reduction to Solar Fuels

“…The fabricated Pd@ TiO 2 /Ti 3 CN||SCE||BiVO 4 catalyst showed maximum formation rate of 45.6 μM/cm 2 •h methanol, ethanol, and formate as major CO 2 reduction products. Jiang et al 119 reported excellent photocatalytic activity and stability for CO 2 reduction with the presence of water vapor under visible light irradiation by the high-entropy oxides of (Ga 0.2 Cr 0.2 Mn 0.2 Ni 0.2 Zn 0.2 ) 3 O 4 with Fd3̅ m spinel structure prepared by the sol−gel method. The results indicated that the high performance was attributed to the ultranarrow bandgap (1.6 eV), abundant structural defects, uniform metal dispersion, and appropriate band structure.…”

High-entropy oxides: an emerging anode material for lithium-ion batteries

“…50 The porous structure HEOs with high specific surface areas can be easily obtained using the solgel method, for example, (CrFeCoNiZn) 3 O 4 51 and Li 1.8 (CrMnFe-CoZn) 3 O x . 52 Wang et al 53 employed the sol-gel method to synthesize the single spinel phase (GaCrMnNiZn) 3 O 4 . (GaCrMn-NiZn) 3 O 4 is composed of the close-packing of spherical particles, verified the characteristic of type IV isotherms with H2 type hysteresis loop.…”