Construction of hierarchical Co, Fe Co-doped MoS2/polypyrrole heterostructure as an efficient bifunctional catalyst for enzyme-like and nitrophenol catalysis

Reactive Template-Engaged Synthesis of NiSx/MoS2 Nanosheets Decorated on Hollow and Porous Carbon Microtubes with Optimal Electronic Modulation toward High-Performance Enzyme-like Performance

“…In addition to the peaks of nickel sulfide, the XRD pattern of the PPy@PDA@NiS x /MoS 2 was in accordance with the phase of MoS 2 (JCPDS no. 37-1492) and NiS x , − revealing that the precursor was totally evolved into NiS x /MoS 2 hybrids after the sulfidation treatment in Figure S3Bc.…”

“…30,31 Similar peak position and structural properties are observed for the NiS x /MoS 2 @NCMTs-700 °C and NiS x /MoS 2 @NCMTs-900 °C shown in XRD pattern (Figure 3Ab,c), whereas the intensity of diffraction peaks becomes sharper with a higher carbonization temperature. Except the diffraction peak for MoS 2 , the other diffraction peaks are indexed to the NiS x , 28 indicating the formation of NiS x /MoS 2 heterostructures. The specific surface area of the composites is closely associated with the catalytic performance, affecting the mass diffusion of the small molecules.…”

“…The HRTEM image (Figure 2G) shows that NiS x /MoS 2 NSs are well wrapped with N-doped porous carbon microtubes. Moreover, the interplanar spacings of two selected regions are 0.626 and 0.25 nm (Figure 2H,I), corresponding to the (002) crystal plane of MoS 2 and the (210) crystal plane of NiS, 28 respectively. The elemental mapping images in Figure 2J show that the Ni, Mo, S, O, C, and N elements are evenly distributed in the NiS x /MoS 2 @NCMTs composites.…”

Recent progress in hierarchical nanostructures for Ni-based industrial-level OER catalysts

“…The size of these nD structures further affects the interface size and subsequent interactions, as well as the final hierarchical structure. [28][29][30][31][32] Inspired by nature, 33…”

“…The size of these n D structures further affects the interface size and subsequent interactions, as well as the final hierarchical structure. 28–32 Inspired by nature, 33 the common morphologies of hierarchical composite materials used for the ICD OER include nanosheets/nanorods/nanowire self-assembled hierarchical flowers or nanosheet structures, assisted by conductive substrates and/or shells (Fig. 1).…”