A Catalytic Copper/Cobalt Oxide Interface for Efficient Hydrogen Generation

Energy & Environmental Materials

article

Wenjing Xu¹  Sheli Zhang¹  Ruofan Shen²  Zhikun Peng²  Baozhong Liu³  Jun Li¹  Zhanying Zhang³  Baojun Li¹ 

[1] School of Science, Jiaozuo Engineering Technology Research Center of Separation and Adsorption Materials, Jiaozuo Teachers College;Research Center of Green Catalysis, College of Chemistry, Zhengzhou University;School of Materials Science and Engineering, Henan Polytechnic University

关键词: ammonia borane;    metal;    metal oxide;    metal-organic framework;    synergistic effect;   

DOI  :  10.1002/eem2.12279

来源: Wiley

【 摘 要 】

Metal nanoparticles and metal oxides promisingly provide different catalytic active sites at their interfaces. Constructing high-density interfaces is essential to maximize synergies. Herein, a Cu–Co3O4 nanoparticles interfacial structure produced via pyrolysis and moderate oxidation from metal-organic frameworks has been designed to boost the intrinsic activity. The Cu–Co3O4 nanoparticles composites exhibit a turnover frequency of 57.5 min−1 for ammonia borane hydrolysis, far higher than those of monometallic Cu and Co3O4 nanoparticles, showing the synergistic effect of Cu and Co3O4 nanoparticles at their interface. Density functional theory calculations and in situ Raman spectroscopy reveal the catalytic mechanism of dual active sites, in which Co3O4 nanoparticles at Cu–Co3O4 interface efficiently bind and activate water molecules and Cu nanoparticles easily activate NH3BH3 molecules. This study opens up a new pathway for achieving high-efficiency noble metal-free catalysts for hydrogen generation and other heterogeneous catalysis.

【 授权许可】

Unknown