Co Nanoparticles/Co, N, S Tri-doped Graphene Templated from In-Situ-Formed Co, S Co-doped g-C3N4 as an Active Bifunctional Electrocatalyst for Overall Water Splitting

• DOI: 10.1021/acsami.7b08138
• Publication Date: 2017-08-10T17:50:11Z
• Authors: Geng Zhang; Ping Wang; Wang-Ting Lu; Cao-Yu Wang; Yong-Ke Li; Cong Ding; Jiangjiang Gu; Xin-Sheng Zheng; Fei-Fei Cao
• Keywords: Graphitic carbon nitride; Carbon fibers; Noble metal

The development of high-performance electrocatalyst with earth-abundant elements for water-splitting is a key factor to improve its cost efficiency. Herein, noble metal-free bifunctional was synthesized by facile pyrolysis method using sucrose, urea, Co(NO3)2 and sulfur powder as raw materials. During the fabrication process, Co, S co-doped graphitic carbon nitride (g-C3N4) first produced, then this in-situ-formed template further induced generation N, tri-doped graphene coupled Co nanoparticles (NPs) in following process. effect temperature (700, 800, 900 °C) on physical properties electrochemical performances final product studied. Thanks increased number layer encapsulated NPs, higher graphitization degree matrix existence hierarchical macro/meso pores, composite prepared under °C presented best activity both hydrogen evolution reaction (HER) oxygen (OER) outstanding long-term durability. This work non-noble-metal-based from also demonstrated potential future investigation application.