Delaminated MBene sheets beyond usual 2D transition metal materials for securing Pt single atoms to boost hydrogen evolution

Abstract

The use of minimum active metallic amount makes single atom catalysts (SACs) as an effective route to economically catalyze electrochemical reactions. However, maintaining their desired stability during synthetic and catalytic...

MBenes for Energy Conversion: Advances, Bottlenecks, and Prospects

“…45,46 Recently, MBenes based catalysts have shown immense potential to be utilized in HER, profiting from its higher conductivity and corrosion-limiting strength. 47 Nevertheless, there are several challenges that have impeded the growth of MBenes based HER active materials such as intricated fabrication methodologies, 48 restricted stability, and nonsuitable morphological features 49 which ascertain further probing toward optimizing MBenes for HER activity. The limited electronic stabilities of MBenes make them vulnerable to the oxidation reaction in a similar fashion to other 2D materials such as MXenes 14 and TMDs.…”

“…50 MBenes have achieved success recently as different novel 2D metal boride monolayers have been developed to extend the gamut of MXene-type materials for HER operations. 47 As compared to the conventional selective-etching method, the dealloying process of MBenes synthesis involves an elimination of the In layer from the MAB parental phase to construct MBene monolayers with higher stability and layered structure retention such as TiB. 17 Li et al 51 scrutinized the TiB monolayers that exhibited remarkable conductivity and advanced stability for HER efficiency.…”

Porous core–shell structured MoO2–Mo2C@C electrocatalysts for pH-universal hydrogen evolution reaction

“…The hydrogen evolution reaction (HER) is a crucial process in electrochemical energy conversion and storage systems, such as water splitting and fuel cells. 1–6 However, the sluggish kinetics of the HER hinder its commercialization due to the high energy consumption for efficient catalysis. Therefore, developing efficient electrocatalysts for the HER is the focus of extensive research efforts.…”

High-efficiency purification of CH4 and H2 energy sources enabled by a phosphotungstic acid-supported Os single-atom catalyst

“…Single-atom catalysts (SACs), known for their maximal atom utilization, are highly active for CO and H 2 oxidation, making them ideal for CO PROX and a top choice for CH 4 and H 2 purification. 16,18–24 Unfortunately, the fabrication of robust SACs is not easy as the metal single atoms are highly active and generally unstable when exposed to environmental stress, 25 and thus tend to sinter to form nanoparticles and clusters. 26…”

“…Single-atom catalysts (SACs), known for their maximal atom utilization, are highly active for CO and H 2 oxidation, making them ideal for CO PROX and a top choice for CH 4 and H 2 purication. 16,[18][19][20][21][22][23][24] Unfortunately, the fabrication of robust SACs is not easy as the metal single atoms are highly active and generally unstable when exposed to environmental stress, 25 and thus tend to sinter to form nanoparticles and clusters. 26 To address this issue, Keggin-type polyoxometalates (POMs) have been identied as top-performing materials for loading SACs, thanks to the "small island effect", 27 that prevents diffusion and modies electronic properties.…”