Metal‐Organic‐Framework‐derived Co Nanoparticles Embedded in P, N‐Dual‐doped Porous Carbon/rGO Catalyst for Water Splitting and Oxygen Reduction

Zhao, Wenyu; Gong, Jiangbin; Yan, Yuxiang; Wu, Niandu; Zhou, Baiquan; Ye, Yong‐Chun; Yang, Shengchun

doi:10.1002/cnma.202200225

Cited by 3 publications

(1 citation statement)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SAED patterns of Co-C nanofibers show four well-defined concentric diffraction rings, which are attributed to the (111), ( 200) and (220) lattice planes of Co and the (002) lattice plane of C, respectively, indicating the presence of metallic Co and carbon with polycrystalline characteristics (Fig. S3c) [38,39]. Moreover, the corresponding HAADF-STEM and elemental mapping images also display the uniform distribution of Co nanoparticles inside and outside the carbon nanofibers (Fig.…”

Section: Morphological and Compositional Investigationmentioning

confidence: 99%

Hierarchical amorphous bimetallic sulfide nanosheets supported on Co-C nanofibers to synergistically boost water electrolysis

Zhong

Chen

et al. 2023

Sci. China Mater.

View full text Add to dashboard Cite

The design of a hierarchical heterostructure as a cost-effective and high-efficiency catalyst to realize electronic and interfacial engineering for the oxygen evolution reaction (OER) is a meaningful option in energy storage and conversion. In this work, amorphous NiFeS nanosheets supported on carbon nanofibers embedded with cobalt nanoparticles (Co-C/NiFeS nanofibers) catalysts are fabricated via the electrospinning-carbonization-electrodeposition strategy. The optimized catalyst possesses a superior OER activity with a low overpotential of 233 mV at 10 mA cm −2 and a Tafel slope of 53.1 mV dec −1 in 1 mol L −1 KOH solution, together with a favorable hydrogen evolution reaction activity. Moreover, an alkaline Pt/C||Co-C/NiFeS electrolyzer constructed with Co-C/NiFeS nanofibers as the anode and commercial Pt/C as the cathode achieves a low cell voltage of 1.48 V at 10 mA cm −2 , which is superior to those of the benchmark Pt/C||RuO 2 cell and many other reported electrolyzers. As a bifunctional electrocatalyst, the Co-C/NiFeS||Co-C/NiFeS electrolyzer can be assembled, exhibiting outstanding long-term stability of 70 h, which significantly outperforms that of the Pt/C||RuO 2 electrolyzer. The remarkable OER performance of the catalyst benefits from the distinct hierarchical heterostructure with Co-C nanofibers core and amorphous NiFeS nanosheets sheath and the generated highly conductive fibrous carbon substrate, endowing it with a large number of exposed active sites, great electrical conductivity and impregnable structural stability. Thus, this work demonstrates a facile and efficient approach to fabricate non-noble metal-based catalysts with superior electrocatalytic performance for practical energy conversion and storage.

show abstract

Section: Morphological and Compositional Investigationmentioning

confidence: 99%