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Novel-hydrogel Derived Honeycomb Ni3S4/N,P-C as Efficient Oxygen Evolution Catalyst.

08:00 EDT 10th April 2019 | BioPortfolio

Summary of "Novel-hydrogel Derived Honeycomb Ni3S4/N,P-C as Efficient Oxygen Evolution Catalyst."

Development of high-efficiency electrocatalysts with low-cost for the oxygen evolution reaction (OER) is essential but remains challenging. Herein, a novel synthesis is proposed to prepare Ni3S4 particles embedded in N,P-codoped honeycomb porous carbon aerogels (Ni3S4/N,P-HPC) via a hydrogel-engaged approach. Preparation of the Ni3S4/N,P-HPC begins with the sol-gel polymerization of tripolyphosphate, chitosan and guanidine polymer that contains metal-binding sites allowing for the uniform incorporation of Ni ions into the gel-matrix, dried with freeze-drying and subsequently carbonized under an inert atmosphere. This synthesis resolves the difficulties to synthesize pure Ni3S4 phase that caused by instability of Ni3S4 at high temperature, while affords a good control of porous structure and N,P-doping of carbon aerogels. The synergy between the structure advantages of N, P-carbon aerogels (such as easily accessible active sites, high specific surface area and excellent electron transport) and the intrinsic electrochemical property of Ni3S4 results in the outstanding OER performance of Ni3S4/N,P-HPC with overpotentials as low as 0.37 V at 10 mA cm-2. The work outlined here offers a simple and effective method to the configuration of carbon-based electrocatalysts for renewable energy conversion.

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This article was published in the following journal.

Name: Chemistry (Weinheim an der Bergstrasse, Germany)
ISSN: 1521-3765
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