Citation: Jianhua Ge, Yujie Liu, Daochuan Jiang, Lei Zhang, Pingwu Du. Integrating non-precious-metal cocatalyst Ni₃N with g-C₃N₄ for enhanced photocatalytic H₂ production in water under visible-light irradiation[J]. Chinese Journal of Catalysis, ;2019, 40(2): 160-167. doi: S1872-2067(19)63283-3 shu

Integrating non-precious-metal cocatalyst Ni₃N with g-C₃N₄ for enhanced photocatalytic H₂ production in water under visible-light irradiation

Jianhua Ge ^a,b, ,
Yujie Liu ^a ,
Daochuan Jiang ^b ,
Lei Zhang ^b ,
Pingwu Du ^b

a School of Earth and Environment, Anhui University of Science & Technology, Huainan 232001, Anhui, China;
b CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials(iChEM), University of Science and Technology of China(USTC), Hefei 230026, Anhui, China

Received Date: 9 October 2018
Revised Date: 14 December 2018

Fund Project: This work was financially supported by the National Key Research and Development Program of China (2017YFA0402800), the National Natural Science Foundation of China (51772285, 21473170, 51878004), the Natural Science Fund of of Anhui Province(1808085ME139), and the Fundamental Research Funds for the Central Universities.

Photocatalytic H₂ production via water splitting in a noble-metal-free photocatalytic system has attracted much attention in recent years. In this study, noble-metal-free Ni₃N was used as an active cocatalyst to enhance the activity of g-C₃N₄ for photocatalytic H₂ production under visible-light irradiation (λ > 420 nm). The characterization results indicated that Ni₃N nanoparticles were successfully loaded onto the g-C₃N₄, which accelerated the separation and transfer of photogenerated electrons and resulted in enhanced photocatalytic H₂ evolution under visible-light irradiation. The hydrogen evolution rate reached~305.4 μmol h^-1 g^-1, which is about three times higher than that of pristine g-C₃N₄, and the apparent quantum yield (AQY) was~0.45% at λ=420. Furthermore, the Ni₃N/g-C₃N₄ photocatalyst showed no obvious decrease in the hydrogen production rate, even after five cycles under visible-light irradiation. Finally, a possible photocatalytic hydrogen evolution mechanism for the Ni₃N/g-C₃N₄ system is proposed.
- Photocatalysis,
- Ni₃N,
- Cocatalyst,
- Hydrogen evolution,
- g-C₃N₄
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Integrating non-precious-metal cocatalyst Ni₃N with g-C₃N₄ for enhanced photocatalytic H₂ production in water under visible-light irradiation