Metal-organic coordination polymers-derived ultra-small MoC nanodot/N-doped carbon combined with CdS: A hollow Z-type catalyst for stable and efficient H2 production/CO2 reduction

Zhang，Siyi1; Du，Shiwen2; Wang，Yumin1; Han，Ziwu1; Ma，Wenmei1; Xu，Hu3; Lei，Yuanchao4; Fang，Pengfei1

2023-01-15

10.1016/j.apsusc.2022.155176

APPLIED SURFACE SCIENCE   Impact Factor & Quartile

0169-4332

1873-5584

Hollow N-doped carbon nanoflower with highly dispersed MoC nanodot embedded forms a cocatalyst and then CdS nanoparticles are grown to construct CdS-C/MoC hollow Z-type heterostructures for hydrogen production and CO reduction. The optimized CdS-C/MoC (CCM2) heterojunction exhibits an enhanced hydrogen evolution reaction (HER) rate of 13917.7 μmol h g that is 4.5-fold as high as that for Pt/CdS with equal load rate via photo-deposition method and highly stabilizes at least 5 cycles (15 h) while HER rate of bare CdS decreases to 38.2 % (267.4 μmol h g ) at the second time. The apparent quantum efficiency (AQE) of CCM2 achieves 82.35 % at λ = 420 nm. Moreover, the CO reduction generation rate of CCM2 is 5.57 μmol h g . Photostable and efficient photocatalytic activities are attributed to special Z-type mechanisms where CdS acts as electrons enrichment site to greatly suppress photo-corrosion, and hollow architecture with multi-scattering of incident light. The reduced H adsorption free energy (ΔG) shows the C/MoC co-catalyst contributes to the enhanced hydrogen production. Density functional theory calculations and electron paramagnetic resonance analysis, further validate the direction of electrons transfer in CdS-C/MoC system and special Z-type mechanisms for stable photocatalytic performance.

CO2 reduction Hollow N-doped carbon nanoflower Hydrogen evolution reaction MoC nanodot Z-type heterostructures

SCI

English

Others

[2019YFA0210003] ; [12275201]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter

WOS:000875309000004

ELSEVIER

MATERIALS SCIENCE

2-s2.0-85139596941

Scopus

1.School of Physics and Technology,Key Laboratory of Nuclear Solid State Physics Hubei Province,Wuhan University,Wuhan,430072,China
2.State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,116023,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.School of Physical Sciences and Technology,ShanghaiTech University,Shanghai,201210,China

Zhang，Siyi,Du，Shiwen,Wang，Yumin,et al. Metal-organic coordination polymers-derived ultra-small MoC nanodot/N-doped carbon combined with CdS: A hollow Z-type catalyst for stable and efficient H2 production/CO2 reduction[J]. APPLIED SURFACE SCIENCE,2023,608.

Zhang，Siyi.,Du，Shiwen.,Wang，Yumin.,Han，Ziwu.,Ma，Wenmei.,...&Fang，Pengfei.(2023).Metal-organic coordination polymers-derived ultra-small MoC nanodot/N-doped carbon combined with CdS: A hollow Z-type catalyst for stable and efficient H2 production/CO2 reduction.APPLIED SURFACE SCIENCE,608.

Zhang，Siyi,et al."Metal-organic coordination polymers-derived ultra-small MoC nanodot/N-doped carbon combined with CdS: A hollow Z-type catalyst for stable and efficient H2 production/CO2 reduction".APPLIED SURFACE SCIENCE 608(2023).