Heterostructured CoP/MoO<sub>2</sub> on Mo foil as high-efficiency electrocatalysts for the hydrogen evolution reaction in both acidic and alkaline media

Wang

et al. 2022

Inorg. Chem. Front.

Section: Resultsmentioning

confidence: 84%

Triple captured iron by defect abundant NiO for efficient water oxidation

Wang

et al. 2022

Inorg. Chem. Front.

“…The formed heterostructure was also confirmed by selected area electron diffraction (SAED; Figure 2f). The TEM images show the diffraction spots of (200) and (211) corresponding to CoP and (106) for MoS 2 [19c,24] . Moreover, the high‐angle annular dark field (HAADF) TEM elemental mappings suggest that Co, Mo, P, and S are distributed uniformly in P‐MoS 2 @CoP/CC (Figure 2g).…”

Section: Resultsmentioning

confidence: 96%

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

et al. 2021

ChemSusChem

Developing a bifunctional water splitting catalyst with high efficiency and low cost are crucial in the electrolysis water industry. Here, we report a rational design and simple preparation method of MoS 2-based bifunctional electrocatalyst on carbon cloth (CC). The optimized P-doped MoS 2 @CoP/CC catalyst presents low overpotentials for the hydrogen (HER) and oxygen evolution reactions (OER) of 64 and 282 mV in alkaline solution as well as 72 mV HER overpotential in H 2 SO 4 at a current density of 10 mA cm À 2. Furthermore, P-MoS 2 @CoP/CC as a bifunctional catalyst delivered relatively low cell voltages of 1.83 and 1.97 V at high current densities of 500 and mA cm À 2 in 30 % KOH. The two-electrode system showed a remarkable stability for 30 h, even outperformed the benchmark RuO 2 j j Pt/ C catalyst. The excellent electrochemical performance can be credited to the unique microstructure, high surface area, and the synergy between metal species. This study presents a possible alternative for noble metal-based catalysts to overcome the challenges of industrial applications.

“…Remaining peaks at 778.95 and 794.15 eV were ascribed to the characteristic Co–P bonds. [ 19 ] Note that Co 7 Mn 1 P‐NPC/CC exhibited a negative shift of 0.2 eV for Co–P bonds when compared with the electrodeposition‐derived bulk CoMnP/CC (top one in Figure 3b), suggesting the electron transfer from surrounding amorphous carbon nanodomains to Co sites. The Mn 2p XPS spectra in Figure 3c also showed a negative BE shift (≈0.3 eV) with the comparison of bulk CoMnP/CC (top one in Figure 3c), further confirming the unique interconnected structure can enable more electrons on CoMnP active phase.…”

Section: Resultsmentioning

confidence: 99%

Amorphous Carbon Interconnected Ultrafine CoMnP with Enhanced Co Electron Delocalization Yields Pt‐Like Activity for Alkaline Water Electrolysis

Wei

Gan

et al. 2022

Adv Funct Materials

Constructing earth-abundant water splitting electrocatalysts performing platinum-like activity is promising for the hydrogen economy but still a challenging task. Herein, the ultrafine CoMnP nanocrystals confined in amorphous carbon nanosheets are designed and implemented by a topological transformation strategy from layer double hydroxide/carbon interconnected structures in one single nanosheet. The unique interconnected structure favors the exposure of active sites and enables stronger electronic coupling effect between the two phases. Experimental results and density functional theory simulations reveal that the surrounding amorphous carbon and Mn dopants synergistically enable better electron delocalization capacity of Co sites, potentially providing enhanced conductivity and optimal reaction energetics during hydrogen evolution. The as-prepared catalyst exhibits hydrogen evolution reaction performances superior to that of Pt/C under alkaline media with an overpotential of 114 mV at 100 mA cm -2 . This work highlights the rational fabrication of transition metalbased electrocatalysts via spatially confined growth for efficient water electrolysis.