Engineering Ultrathin MoS₂ Nanosheets on Co_xP/Nitrogen‐Doped Carbon Nanocubes for Efficient Hydrogen Evolution

Abstract

Designing core‐shell heterostructures is essential for electrocatalytic hydrogen evolution reaction (HER). In this study, ultrathin MoS2 sheets are uniformly anchored on CoxP/nitrogen dual‐doped carbon nanocubes (CoxP/NC) through a template sacrificial method followed by a hydrothermal reaction. The resultant hybrid CoxP/NC@MoS2 possesses a core‐shell structure and superior catalytic activity to individual counterparts. The hybrid catalyst needs a low overpotential of 148 mV to drive the current density of 10 mA cm−2, together with an extremely small Tafel slope of 33 mV dec−1 and outstanding stability in acidic media. Most importantly, the best catalytic activity is achieved by coupling MoS2 nanosheets with the matrix CoxP/NC rather than Co/NC. The remarkably high HER activity of CoxP/NC@MoS2 mainly benefits from the core‐shell feature and strong synergistic interaction between CoxP/NC and MoS2. The present study inspires a continuous exploration of engineering MoS2 nanosheets on nanostructured metal phosphides for electrochemical applications.

Cu(OH)2 Nanorods/Ni(OH)2 Nanosheets as Highly Efficient Catalyst for Hydrogen Evolution Reaction

“…Figure7(a) shows the XRD pattern of Cu(OH) 2 NRs @ Ni(OH)2 NSs, the peaks position information are consistent with the previous description, which confirm the formation of Cu(OH) 2 NRs @ Ni(OH) 2 NSs on single crystal Cu foil. Figure7(b)-(d) show the SEM images of Cu(OH) 2 NRs @ Ni(OH) 2 NSs.…”

“…However, massive consumption of fossil energy, such as petroleum, coal, and natural gas, leads to a series of serious problems, including greenhouse gases, atmospheric pollution, and energy crisis. [1,2] Developing environment-friendly and renewable energy is a promising way to resolve energy crisis and environmental pollution. [3] Thus, various clean energy, such as hydrogen, solar, and biomass energy etc.…”

Interface Engineering of Needle‐Like P‐Doped MoS2/CoP Arrays as Highly Active and Durable Bifunctional Electrocatalyst for Overall Water Splitting

“…The isotherm data indicate that the Brunauer‐Emmett‐Teller (BET) surface area of CoP and P‐MoS 2 @CoP are 15 and 13 m 2 g −1 , accompanying Barrett‐Joyner‐Halenda (BJH) average pore size distributions are 30 and 12 nm, respectively. This change could be due to the reduced surface area resulting from P‐MoS 2 modification, which shortens the gaps between the needle‐like structures [20b] . The high porosity of P‐MoS 2 @CoP is beneficial for mass transfer and access to more active sites.…”