N, P co-doping triggered phase transition of MoS₂ with enlarged interlayer spacing for efficient hydrogen evolution

Abstract

Molybdenum disulfide (MoS2)-based transition-metal chalcogenides are considered to be cost-efficient, environmentally-friendly, and stable materials in the application of electrocatalytic hydrogen production.

Manipulation of the 1T-MoS2 domain in a 2H-MoS2 main phase induced by V-doping via a CVD vapor–liquid–solid mechanism

“…23 Feng et al introduced N and P co-doping to prepare ultra-stable 1T–2H MoS 2 . 24 However, 1T-MoS 2 in these studies was randomly distributed in the 2H-MoS 2 domains. To achieve a position-controlled distribution of 1T-MoS 2 , Chhowalla et al used electron-beam exposure technology to expose specific positions by locally soaking in butyl lithium to induce phase transformation in the exposed part and realized the position-controlled distribution of the 1T phase in the 2H main phase.…”

Dual doping: An emerging strategy to construct efficient metal catalysts for water electrolysis

“…203 However, Feng et al found that the N and P dopants could realize the conversion of 2H MoS 2 to 1T MoS 2 and enlarge the interlayer spacing. 191 Therefore, the dual anion dopants help to improve the conductivity of MoS 2 . In addition, DFT calculations found a smaller G H* value of 0.08 eV on N/P-MoS 2 than that of N-MoS 2 (0.73 eV), P-MoS 2 (0.67 eV), and MoS 2 (2.05 eV), suggesting enhanced HER intrinsic activity.…”

“…However, Feng et al. found that the N and P dopants could realize the conversion of 2H MoS 2 to 1T MoS 2 and enlarge the interlayer spacing 191 . Therefore, the dual anion dopants help to improve the conductivity of MoS 2 .…”