Dual-metal NiCo nanoparticles in B-doped carbon layers as efficient and durable electrocatalyst for oxygen evolution reaction
Dual-metal NiCo nanoparticles in B-doped carbon layers as efficient and durable electrocatalyst for oxygen evolution reaction
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DOI：
10.1016/j.apsusc.2020.147381
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发表时间：
2020-12
影响因子：
6.7
通讯作者：
Shuai Chao;Z. Mo;Xiaohui Niu;Yongxing Du;Qinqin Gao;Liu Jingjing;Liu Nijuan-;R. Guo
中科院分区：
文献类型：
--
作者：
Shuai Chao;Z. Mo;Xiaohui Niu;Yongxing Du;Qinqin Gao;Liu Jingjing;Liu Nijuan-;R. Guo
Designing and construction of efficient and robust non-noble-metal electrocatalysts for oxygen evolution reaction (OER) is a pivotal approach in water splitting process. This work developed the dual-metal material system of Ni-Co nanoparticles wrapped in B-doped carbon (Ni1Co3@BC) through simple and economical pyrolysis process for nanosheets NiCo metal-organic framework (Ni1Co3-BDC) precursor. The constitution and structure of characterization were characterized by X-ray diffraction, X-ray photoelectron spectroscopy scanning electron microscope and transmission electron microscope, indicating the homogeneous alloy and less metal boride phase and B doped graphitization structure for Ni1Co3@BC. An optimized Ni1Co3@BC exhibited extraordinary OER performance, providing an overpotential as small as 309 mV at a current density of 10 mA cm−2, a low Tafel slope of 62 mV dec−1and excellent stability in 1.0 M KOH solution, which attributed to the synergistic effect of inner NiCo alloy, NiCo boride nanoparticles and external B doping carbon structure. The formation of B doped carbon layer not only provides additional active sites but also protects inner metal alloys. This work clearly stated the design and synthesis of desired-morphology features catalysts from controlled MOFs for energy conversation and storage.
