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General Synthesis of Ultrathin Metal Borate Nanomeshes Enabled by 3D Bark‐Like N‐Doped Carbon for Electrocatalysis
Author(s) -
Hu Qi,
Li Guomin,
Han Zhen,
Wang Ziyu,
Huang Xiaowan,
Chai Xiaoyan,
Zhang Qianling,
Liu Jianhong,
He Chuanxin
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201901130
Subject(s) - nanoreactor , materials science , electrocatalyst , nanotechnology , chemical engineering , carbon fibers , catalysis , water splitting , oxygen evolution , sodium borohydride , nanomesh , metal , nanoparticle , electrochemistry , graphene , chemistry , organic chemistry , electrode , photocatalysis , composite number , composite material , metallurgy , engineering
Ultrathin nanomeshes perfectly inherit the integrated advantages of ultrathin 2D materials and porous nanostructures, which have shown their great application potential in catalysis and electronic devices. Here, the general synthesis of ultrathin metal borate (i.e., Co‐B i , Ni‐B i , and Fe‐B i ) nanomeshes is reported by capitalizing on 3D bark‐like N‐doped carbon (denoted BNC) as nanoreactors. Indeed, this strategy is straightforward, only comprising a one‐step reaction between metal cations and sodium borohydride without using templates. As nanoreactors, the BNC derived from biomass waste of lychee exocarp possesses distinctive advantages of low cost, fractured textures, porous nanostructures (surface area: 1915.5 m 2 g −1 ), electronegative surface (zeta potential: −43.4 mV), and superhydrophilicity for greatly facilitating the adsorption of metal cations with strong strength to effectively control the growth of 2D nanomeshes. The as‐synthesized Co‐B i and Ru‐doped Co‐B i (Ru‐Co‐B i ) nanomeshes exhibit excellent performance for the oxygen evolution reaction and hydrogen evolution reaction, respectively. Impressively, the water splitting device based on the Co‐B i and Ru‐Co‐B i nanomeshes can enable a current density of 10 mA cm −2 at a small cell voltage of 1.53 V. Therefore, this work paves new avenues for the facile synthesis of ultrathin metal nanomeshes.