In-situ grafting of N-doped carbon nanotubes with Ni encapsulation onto MOF-derived hierarchical hybrids for efficient electrocatalytic hydrogen evolution

被引:76
作者
Cheng, Ningyan [1 ]
Wang, Nana [1 ]
Ren, Long [1 ,2 ]
Casillas-Garcia, Gilberto [3 ]
Liu, Nana [1 ]
Liu, Yani [1 ]
Xu, Xun [1 ]
Hao, Weichang [2 ,4 ]
Dou, Shi Xue [1 ]
Du, Yi [1 ,2 ]
机构
[1] Univ Wollongong, Inst Superconducting & Elect Mat ISEM, Australian Inst Innovat Mat AIIM, Wollongong, NSW 2525, Australia
[2] Beihang Univ, BUAA UOW Joint Res Ctr, Beijing 100091, Peoples R China
[3] Univ Wollongong, Electron Microscopy Ctr, Wollongong, NSW 2525, Australia
[4] Beihang Univ, Sch Phys, Beijing 100191, Peoples R China
基金
澳大利亚研究理事会; 中国国家自然科学基金;
关键词
BIFUNCTIONAL ELECTROCATALYST; CATALYSTS; NANOCOMPOSITES; NANOPARTICLES; CATHODE; ARRAYS; H-2;
D O I
10.1016/j.carbon.2020.03.017
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Developing highly efficient and cost-effective catalysts for the hydrogen evolution reaction (HER) is of paramount importance to solve the problems arising from the depletion of non-renewable fossil fuels and increasing air pollution issues. Herein, an in-situ heterogeneous catalytic synthesis approach is developed for constructing hierarchical Ni/carbon hybrids via grafting nitrogen-doped-carbon (NC) nanotubes with Ni encapsulation onto the metal-organic framework (MOF)-derived carbon matrix. Following the "nanotube tip-growth model" involved in the in-situ catalytic synthesis process, the morphology and size of the nanotubes and encapsulated particles of the as-prepared hierarchical Ni-based carbon hybrids can be controlled by regulating the conditions during the thermal decomposition of the Ni-MOF in the presence of melamine. The grafting and decoration of the Ni-encapsulated carbon nanotubes on the MOF-derived architecture rapidly enhance the HER electrocatalytic performance of the bare thermally decomposed Ni/N-doped carbon composite. Due to the synergistic effects of the stable metallic Ni active sites and the N-doped carbon support, the optimized Ni@NC6-600 sample exhibits stable and high catalytic activity, only requiring an overpotential of 181 mV to drive 10 mA/cm(2) towards the HER in alkaline media. (C) 2020 Elsevier Ltd. All rights reserved.
引用
收藏
页码:178 / 185
页数:8
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