Tailoring a low-energy ball milled MnCo2O4 spinel catalyst to boost oxygen evolution reaction performance

Interfacial Electronic Modulation on Nickel Cobaltite/Black Phosphorus Heterostructures for Boosting the Electrocatalytic Oxygen Evolution Reaction

“…Among them, the overpotentials of BM-NCO and BM-BP are obviously lower than those of NCO and BP, demonstrating that the ball-milling process accompanied by the size reduction and exfoliation of the catalysts contributes to electrocatalytic OER performance. 41 It should be noted that the overpotential for NCO/BP is significantly lower than that of the NCO + BP mixture, proving that the formation of heterogeneous interfaces greatly enhances the OER performances. The heterogeneous interfacial interaction between the NCO and BP promotes the rapid transfer of electrons from BP to NCO In general, the electrochemically active surface area (ECSA) was calculated using electrochemical double-layer capacitance (C dl ) (Figure S7).…”

“…The BET surface area of NCO/BP is about 38.14 m 2 ·g –1 , which is much larger than that of BP (7.41 m 2 ·g –1 ) (Figure S2a). In fact, the size reduction and exfoliation of NCO and BP are accompanied by the ball-milling process, which maybe the main reason for the increase of the BET surface . From the pore size distributions (Figure S2b), the micropores and mesopores both co-existed in the NCO/BP catalyst .…”

“…In fact, the size reduction and exfoliation of NCO and BP are accompanied by the ball-milling process, which maybe the main reason for the increase of the BET surface. 41 From the pore size distributions (Figure S2b), the micropores and mesopores both co-existed in the NCO/BP catalyst. 23 The unique pore structures and large BET surface area of NCO/BP could facilitate the electrolyte penetration and favor the exposure of more active sites, thus accelerating OER reaction kinetics.…”

“…With the continuous increase in the amount of BP, the NCO/BP shows a trend of an initial decrease, followed by a subsequent increase. Among them, the overpotentials of BM-NCO and BM-BP are obviously lower than those of NCO and BP, demonstrating that the ball-milling process accompanied by the size reduction and exfoliation of the catalysts contributes to electrocatalytic OER performance . It should be noted that the overpotential for NCO/BP is significantly lower than that of the NCO + BP mixture, proving that the formation of heterogeneous interfaces greatly enhances the OER performances.…”

Influence of conductive carbon and MnCo2O4 on morphological and electrical properties of hydrogels for electrochemical energy conversion

“…In the case of a sample where the concentration of particles of conductive carbon reached the value of 54.6 mg/mL (Hgel-MCO-cCB 1:6), much smaller MCO aggregates were visible ( Figure 2c ,f, and i). The average diameter of the used commercial MnCo 2 O 4 particles after 0.5 h in an ultrasound bath was 204.5 ± 92.9 nm [ 46 ]. Also, their arrangement seems to be much more homogeneous than that in the case of composites with a lower concentration of cCB particles.…”