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Your search keyword '"Junke Zhu"' showing total 2 results
Start Over Author "Junke Zhu" Publisher american chemical society (acs)
2 results on '"Junke Zhu"'

1. Self-Templating Synthesis of Hollow Co3O4 Nanoparticles Embedded in N,S-Dual-Doped Reduced Graphene Oxide for Lithium Ion Batteries

Author

Bin Liu, Yapeng Cheng, Junke Zhu, Zhao Deng, Wenmao Tu, Heng Zhang, Haining Zhang, and Hongfei Pan

Subjects
Materials science, Graphene, Doping, General Engineering, Oxide, General Physics and Astronomy, chemistry.chemical_element, Nanoparticle, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Lithium-ion battery, 0104 chemical sciences, law.invention, chemistry.chemical_compound, Chemical engineering, chemistry, Transition metal, law, General Materials Science, Metal-organic framework, Lithium, 0210 nano-technology
Abstract

The design and synthesis of hollow-nanostructured transition metal oxide-based anodes is of great importance for long-term operation of lithium ion batteries. Herein, we report a two-step calcinati...

Published
2020

2. Double Metal Diphosphide Pair Nanocages Coupled with P-Doped Carbon for Accelerated Oxygen and Hydrogen Evolution Kinetics

Author

Huihui Jin, Shichun Mu, Zonghua Pu, Pengxia Ji, Hongliang Xia, Junke Zhu, and Xu Luo

Subjects
Materials science, Phosphide, Oxygen evolution, 02 engineering and technology, Overpotential, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, Electrocatalyst, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, Nanocages, chemistry, Chemical engineering, General Materials Science, 0210 nano-technology, Bifunctional, Bimetallic strip
Abstract

Developing efficient and durable bifunctional transition metal phosphide (TMP) electrocatalysts is still a great challenge because of its relatively sluggish kinetics of oxygen evolution reaction (OER). Herein, we report a unique bimetallic diphosphide pair (FeP2–NiP2) forming spherical nanocages encapsulated in P-doped carbon layers (FeP2–NiP2@PC) as advanced bifunctional electrocatalyst synthesized by a very facile phosphorization approach. The obtained FeP2–NiP2@PC electrocatalyst exhibits an outstanding OER activity with an ultralow overpotential of 248 mV in 1 M KOH and a low overpotential of 117 mV for HER in 0.5 M H2SO4 (@10 mA·cm–2). Also it gives an exceptional long-term durability toward OER (60 h) and HER (20 h). Differently from the electrocatalysts as reported, after successive 3000 cycles CV acceleration, its overpotential decreases about 10 mV. Further investigation unveils that the electrochemical activation process boosts in situ phase transformation of oxides and phosphides to oxyhydroxi...

Published
2019

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