MoS₂ quantum dot-decorated MXene nanosheets as efficient hydrogen evolution electrocatalysts

Abstract

2D MXene nanosheets are regarded as promising cathode catalysts towards the hydrogen evolution reaction (HER), while their overall electrocatalytic ability still needs to be optimized before the practical application. In...

Ultrafine cobalt selenide nanowires tangled with MXene nanosheets as highly efficient electrocatalysts toward the hydrogen evolution reaction

“…The ineluctable surface oxidation of the Ti 3 C 2 T x nanosheets should be the reason for the presence of Ti oxides, which is coincident with the previous literature. 37,38 Meanwhile, the existence of the Se component in the nanostructure is evidenced by the Se 3d 5/2 and Se 3d 3/2 signals observed at 55.3 and 59.8 eV, respectively. Additionally, both Co 2p 1/2 and Co 2p 3/2 peaks can be deconvoluted into three peaks, consisting of peaks at S1 (780.8 eV) and S1′ (796.8 eV) that originate from the Co 2+ cations, S2 (783.5 eV) and S2′ (799.2 eV) assigned to the Co 3+ cations, as well as S3 (786.5 eV) and S3′ (803.3 eV) corresponding to the shakeup satellite peaks.…”

Transition metal quantum dots for the electrocatalytic hydrogen evolution reaction: recent progresses and challenges

“…8). 111 With optimisation study, the lowest onset potential of 66 mV was obtained with Tafel slope of 74 mV dec -1 which is small with increased life showing contrast behaviour of individual Mxene or QDs. Liu et al reported the introduction of transition metals on to the Ru metal-based carbon quantum dots.…”

“…Fig.8. The overall graphical representation of HER with MoS 2 QDs with MXene composite.Reproduced from ref 111. (Copyright 2022, The Royal Society).…”

Ultrafine Rh nanocrystals immobilized on 3D boron and nitrogen co-doped graphene–carbon nanotube networks: high-efficiency electrocatalysts towards the methanol oxidation reaction

“…Confronting the rising energy prices and serious environmental degradation, great efforts have been devoted to the development of various advanced energy and environmental technologies. [1][2][3][4] Direct methanol fuel cells (DMFCs), as a green power generation device that can directly convert chemical energy into electrical energy, play an increasingly important role in daily life. 5,6 In particular, DMFCs have been considered to be a very promising power source in the fields of portable electronic devices, electric vehicles, and aerospace crafts because of their high energy conversion efficiency, wide working temperature range, environmental friendliness, and structural safety.…”