Phosphorus‐Doped MoS₂ Nanosheets Supported on Carbon Cloths as Efficient Hydrogen‐Generation Electrocatalysts

Abstract

Highly efficient and stable non‐noble metal electrocatalysts for hydrogen generation are desired for sustainable development of energy conversion and storage. Here, a facile low‐temperature phosphidation process is developed for phosphorus doping into molybdenum disulfide (MoS2) nanosheets directly synthesized on carbon cloths to function as an integrated electrode for efficient hydrogen evolution reaction. The optimal phosphorus‐doped (3.3 at%) MoS2 nanosheets exhibit substantially lower overpotentials of 133 and 189 mV to drive the current densities of 20 and 100 mA cm‐2, respectively, as compared with undoped MoS2, and an impressively small Tafel slope of 67.0 mV dec−1. The excellent stability in acid media also makes the phosphorus‐doped MoS2 nanosheet catalysts promising candidates for hydrogen generation in practical applications.

Engineered 2D Transition Metal Dichalcogenides—A Vision of Viable Hydrogen Evolution Reaction Catalysis

“…[ 110 ] Other measurements on the P doped 2D MoS 2 (also the WS 2 ) have further confirmed the improved catalytic performance on HER. [ 99,116,117 ]…”

Synergistic Doping and Intercalation: Realizing Deep Phase Modulation on MoS2 Arrays for High‐Efficiency Hydrogen Evolution Reaction

“…[33][34][35] Then egligible HER activity of VG skeleton suggests that the VG is mainly used as ah ighly conductive support for active MoS 2 nanosheets.The excellent catalytic performance of (N,PO 4 3À )-MoS 2 /VGisattributed to the synergistic doping-intercalation effect and higher proportion of 1T-MoS 2 .T he HER performance of (N,PO 4 3À )-MoS 2 / VG is also better than those of reported Mo-based materials (Figure 4c)r eported previously. [36][37][38][39][40][41][42][43][44] To eliminate the influence of surface area and reveal the intrinsic catalytic behavior, turnover frequency (TOF) is calculated to gain the intrinsic per-site activity, [28,45] as shown in the Supporting Information, Figure S15. Impressively,t he TOFv alues of (N,PO 4 3À )-MoS 2 /VGa re larger than those of MoS 2 /VG, N- intercalation can essentially promote the activity for HER catalysis.T he cycling durability test was carried out at 10 mA cm À2 for 10 h, and there is no obvious decay observed for the all electrodes (Figure 4d), suggesting their excellent long-term stability.M oreover,c omparatively,t he S2pa nd Mo 3d XPS spectra of (N,PO 4 3À )-MoS 2 /VGa fter 1000 cycles (Supporting Information, Figure S16) do not change and all characteristic peaks are noticed, demonstrating its excellent stability.Furthermore,SEM image (Supporting Information, Figure S17) after 10 hs tability test reveals that the morphology of (N,PO 4 3À )-MoS 2 /VGa rray is well maintained, further suggesting its excellent structure stability.T ofurther study the superior HER performance of the (N,PO 4 3À )-MoS 2 /VG electrode,t he effective electrochemical active surface areas (ECSA) of these electrodes were calculated by monitoring the double-layer capacitance (C dl )according to the CV results at different scan rates (Supporting Information , Figure S18).…”

Layered Ternary and Quaternary Transition Metal Chalcogenide Based Catalysts for Water Splitting

“…Evidently, huge amounts of work have already proved that the introduction of 3D substrate would substantially improve the corresponding electrocatalytic performance [105][106][107]. To be specific, our group prepared readily the ultrathin P-doped MoS 2 nanosheets on carbon cloth [108]. The synergistic effect between large surface area and modified active sites would make the P-doped (3.3 at.%) MoS 2 nanosheets exhibiting the significantly lower overpotentials of 133 and 189 mV to drive the current densities of 20 and 100 mA cm −2 , respectively.…”