Construction of CoP/NiCoP Nanotadpoles Heterojunction Interface for Wide pH Hydrogen Evolution Electrocatalysis and Supercapacitor
By Yan Lin, Kaian Sun, Shoujie Liu, Xiaomeng Chen, Yuan-Sheng Cheng, W. Cheong, Zheng Chen, Lirong Zheng, Jun Zhang, Xiyou Li and 2 more. Advanced Energy Materials, 2019
321 citations recorded by the source corpus.
Constructing well defined nanostructures is promising but still challenging for high‐efficiency catalysts for hydrogen evolution reaction (HER) and energy storage. Herein, utilizing the differences in surface energies between (111) facets of CoP and NiCoP, a novel CoP/NiCoP heterojunction is designed and synthesized with a nanotadpoles (NTs)‐like morphology via a solid‐state phase transformation strategy. By effective interface construction, the disorder in terms of electronic structure and coordination environment at the interface in CoP/NiCoP NTs is created, which leads to dramatically elevated HER performance within a wide pH range. Theoretical calculations prove that an optimized proton chemisorption and H2O dissociation are achieved by an optimized phosphide polymorph at the interface, accelerating the HER reaction. The CoP/NiCoP NTs are also proved to be excellent candidates for use in supercapacitors (SCs) with a high specific capacitance (1106.2 F g−1 at 1 A g−1) and good cycling stability (nearly 100% initial capacity retention after 1000 cycles). An asymmetric supercapacitor shows a high energy density (145 F g−1 at 1 A g−1) and good cycling stability (capacitance retention is 95% after 3200 cycles). This work provides new insights into the catalyst design for electrocatalytic and energy storage applications.
Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/1543f5e93c22273ec1714a5917ce8ed21d2c3ee1
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Citations in the corpus
- Tailoring nanostructured transition metal phosphides for high-performance hybrid supercapacitors (2021, methodology): “Most of TMPs are fabricated by annealing precursors (hydroxides or oxides) in inter gas using NaH2PO2 as the phosphorus source [99,162,163].”