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Designing highly excellent and stable catalysts for alkaline oxygen evolution reaction (OER) is gradually pivotal for clean energy development. In this work, a heterogeneous Fe‐doped Ni(OH)2 (Ni/Fe‐0.1) was developed via simple one‐step electrodeposition onto nickel mesh. The heterogeneous interface structure generates sufficient active sites, significantly improving OER performance with an overpotential of 174 mV at 10 mA cm−2 (η10), while Tafel slope is only 43.0 mV dec−1. In particular, Ni/Fe‐0.1 is still able to operate stably at a current density of 1 A cm−2 for 100 h without obvious potential decay. The oxidation of Ni2+ to Ni3+ was detected by X‐ray photoelectron spectroscopy, proving that the heterogeneous catalyst could stabilize the high‐valence state of nickel as active sites to its superior OER performance. This work provides a convenient synthetic strategy for forming heterogeneous catalysts toward efficient water electrolysis. [ABSTRACT FROM AUTHOR]

To simultaneously improve the hole extraction ability of the BiVO4 photoanode and accelerate the surface reaction kinetics, herein, a carbon nanolayer conformally coated Fe2O3 (C−Fe2O3) as oxygen evolution catalyst (OEC) is loaded on the H2 plasma treated nanoporous BiVO4 (BVO(H2)) surface by a hydrothermal reaction. It is found that the H2 plasma induced vacancies in BVO remarkably increases the conductivity, and the C−Fe2O3 enables hole extraction from the bulk to the surface as well as efficient hole injection to the electrolyte. As a result, the C−Fe2O3/BVO(H2) photoanode achieves a photocurrent density of 4.4 mA/cm2 at 1.23 V vs. reversible hydrogen electrode (RHE) and an ABPE value of 1.5 % at 0.68 V vs. RHE, which are 4.8‐fold and 13‐fold higher than that of BVO photoanode, respectively. [ABSTRACT FROM AUTHOR]

Metal‐organic frameworks (MOFs) constructed by ligands and metal clusters, have been considered as a promising material for photocatalytic water splitting. In this work, a solvent‐assisted ligand exchange (SALE) method has been applied through partial reverse substitution of the ligand in NH2‐MIL‐125 (Ti) by 1,4‐dicarboxybenzene (BDC). This modification strategy can optimize the charge transfer dynamics together with the preserved light absorption, resulting in a 3.3 times higher hydrogen production rate compared to the pristine material under visible‐light irradiation. This work broadens the field of ligand modifications of MOFs to boost the photocatalytic performance. [ABSTRACT FROM AUTHOR]

Metallic Ni3P/Ni can be used as a co-catalyst to replace noble metal Pt for efficient photocatalytic hydrogen evolution, due to its excellent trapping-electron ability. The applications of metallic Ni3P/Ni co-catalyst on CdS, Zn0.5Cd0.5S, TiO2 (Degussa P25) and g-C3N4 are further confirmed, indicating its versatile applicability nature like Pt. [ABSTRACT FROM AUTHOR]