Constructing multifunctional 'Nanoplatelet-on-Nanoarray' electrocatalyst with unprecedented activity towards novel selective organic oxidation reactions to boost hydrogen production

被引:131
作者
Deng, Xiaohui [1 ]
Li, Mei [1 ]
Fan, Yun [1 ]
Wang, Lei [1 ]
Fu, Xian-Zhu [1 ]
Luo, Jing-Li [1 ,2 ]
机构
[1] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen, Peoples R China
[2] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
基金
中国国家自然科学基金;
关键词
Metal-organic framework; Nanoarray; Oxidation reaction; Hydrogen evolution; Biomass upgrading; OXYGEN EVOLUTION CATALYSTS; NANOSHEET ARRAYS; NICKEL-HYDROXIDE; EFFICIENT; WATER; GLYCEROL; CONVERSION; ELECTROOXIDATION; GENERATION; FRAMEWORKS;
D O I
10.1016/j.apcatb.2020.119339
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
Replacing oxygen evolution reaction with thermodynamically more favorable organic oxidation reactions is considered as attractive approach to enhance the energy conversion efficiency in electrochemical water splitting. Herein, 'Nanoplatelet-on-Nanoarray' NiCo hydroxide-based electrocatalysts (t-NiCo-MOF) fabricated from the facile transformation of bimetallic metal-organic framework nanoarrays is reported to exhibit rich surface active sites and unprecedented activity towards the oxidation of organic molecules including 5-hydroxymethylfurfural, urea, methanol and glycerol. Benefitting from the synergy between Ni/Co and unique nanostructure which facilitates the charge and mass transfer, the optimal electrode exhibits current densities of 600 similar to 730 mA/cm(2) at 1.4 V vs RHE and the Tafel slopes are in the range of 35 similar to 58 mV/dec depending on the oxidized species. Value-added chemicals such as 2,5-furandicarboxylic acid and formate are produced from HMF and methanol/glycerol (main constituents of 'bio-glycerol') with high FE and superior stability, demonstrating its promises in high-throughput electrochemical biomass upgrading.
引用
收藏
页数:13
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