In situ phosphating of Zn-doped bimetallic skeletons as a versatile electrocatalyst for water splitting

Abstract

Highly efficient electrocatalysts for water splitting generally involve noble metals (Pt, Ir, Ru, etc.) or expensive transition metals (Ni, Co, Cu, etc.), which has hindered their widespread application. Here, we...

Directional Charge Transfer Channels in a Monolithically Integrated Electrode for Photoassisted Overall Water Splitting

“…Similar to the C 1 s spectra, the positive shift binding energy from the N 1s XPS spectrum of CCN@FFC compared with that of CCN may be attributed to the injection of electrons from CCN to FFC, resulting in a strong interaction at the heterointerface between the two components . The fine scanning Fe 2p spectrum (Figure d) from the FFC surface consists of two major peaks located at 711.5 and 724.4 eV that can be ascribed to the oxidized Fe 2+ /Fe 3+ , simultaneously with two satellite peaks (abbreviated as “sat.”) at 716.6 and 719.7 eV and metallic Fe at 706.6 eV, suggesting the presence of partially charged Fe species (Fe δ+ , δ is likely close to 0). − Particularly, compared to bare FFC, there is a negative shift of Fe 3+ peaks in the XPS spectra of CCN@FFC meanwhile with an additional sat. peak at 708.3 eV assigned to Fe 2+ , which can be attributed to the formation of the directional charge transfer channels (C–O–Fe) between CCN and FFC enriching the electron densities in Fe sites.…”

Recent research progress on operational stability of metal oxide/sulfide photoanodes in photoelectrochemical cells

“…The multiple oxidation states of Mn-based catalysts reduce the barrier of the O-Mn-O pathway to promote local hole transport around the Mn center, which may benefit the water oxidation activity. Under neutral conditions, the catalytic performance of manganese oxide nanoparticles (NPs) is superior to that of previously reported transition metal-based catalysts [121]. Thus, Jang et al prepared ligand-engineered MnO NP-decorated BiVO4-based anodes [122].…”

Corrosion engineering approach to rapidly prepare Ni(Fe)OOH/Ni(Fe)Sx nanosheet arrays for efficient water oxidation

“…Electrochemical water splitting is regarded as one of the most promising pathways for yielding hydrogen. [1][2][3][4] However, the hydrogen yield suffers from slow kinetics of the oxygen evolution reaction (OER) owing to the multi-electronic transfer in OER. [5][6][7] Noble metals, such as Ru and Ir, with high intrinsic catalytic activity, are regarded as ideal catalysts for OER.…”