MoP₄/Ni₃S₂/MoO₃ heterogeneous structure nanorod arrays for efficient solar-enhanced overall water splitting

Abstract

NiMo-PS@NF is synthesized using the strategy of simultaneous phosphatization/sulfidation strategy. It exhibits significant electrocatalytic activity for the OWS under solar assistance. Notably, it exhibits an STH of 19.42% in OWS.

Unlocking the potential of NiCo2O4 nanocomposites: morphology modification based on urea concentration and hydrothermal and calcination temperature

“…As an indicator of the intrinsic catalytic activity, turnover frequency (TOF) can be calculated to show the rate of oxygen produced per active site of the material based on the formula TOF = j * A /(4* F * m ), in which j is the current density at a specific potential ( A cm −2 ), A is the surface area of the electrode (1 cm −2 ), F is the Faraday constant (96 485 C mol −1 ), and m is the amount of active material (mol cm −2 ). 52,53 TOF OER for NiCo-S3 and NiCo-S4 is given in Table 2. As can be seen, the TOF for NiCo-S3 and NiCo-S4 is 1.69 and 2.51 (10 −3 S −1 ), respectively, with almost 48% higher TOF for NiCo-S4, in line with the results obtained by LSV, Tafel slope and ECSA.…”

Convenient synthesis and enhanced urea oxidation of NiO–CrO@N–C

“…Precious metal catalysts (Rh and Ir) can improve the kinetics of the UOR, but their scarcity and high price limit their widespread application. 14–16 Therefore, the research target has shifted from precious metals to cheap transition-metal-based UOR catalysts. 17–20 For example, Kim et al synthesized an ultrathin sheet of bimetallic Cu–Fe-based metal–organic frameworks (Cu/Fe-MOFs) anchored on nickel foam (NF) via a drop-casting route, which had excellent activity for the UOR and could drive a current density ( j ) of 10 mA cm −2 with only 1.37 V vs .…”

Preparation of nanocellulose-based nitrogen-doped carbon aerogel electrocatalysts through hydrothermal pretreatment for zinc–air batteries

“…18–23 However, their electrochemical performances and commercial applications are impeded by the sluggish kinetics of the ORR/OER at the cathode. 24–28 To address the above issues, many new electrocatalysts have been developed, in which noble metal catalysts reveal excellent catalytic activity but are limited by their scarcity and high cost. 29,30 The natural advantages that CNF-based carbon aerogels possess give them great potential as cathode catalysts for ZABs.…”