Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (2): 536-545.DOI: 10.1016/S1872-2067(21)63865-2
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Liang Jiana, Huizhen Zhanga, Bing Liua, Chengsi Pana, Yuming Donga,*(), Guangli Wanga, Jun Zhongb, Yongjie Zhengc, Yongfa Zhua,d,#(
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Received:
2021-05-10
Accepted:
2021-06-16
Online:
2022-02-18
Published:
2021-06-28
Contact:
Yuming Dong, Yongfa Zhu
Supported by:
Liang Jian, Huizhen Zhang, Bing Liu, Chengsi Pan, Yuming Dong, Guangli Wang, Jun Zhong, Yongjie Zheng, Yongfa Zhu. Monodisperse Ni-clusters anchored on carbon nitride for efficient photocatalytic hydrogen evolution[J]. Chinese Journal of Catalysis, 2022, 43(2): 536-545.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63865-2
Fig. 2. (a) XPS spectrum of Ni-cluster/CN; (b) High-resolution XPS spectrum of Ni 2p; (c) XANES curves of Ni-cluster/CN at the edge of Ni-K and Ni(OH)2 reference spectrum; (d) Corresponding Fourier transform curve of EXAFS spectrum.
Fig. 3. High-resolution XPS spectra of C 1s (a) and N 1s (b) of CN, Ni-cluster/CN and Ni(OH)2NPs/CN; XAS spectra of Ni-cluster/CN and reference samples are located at edge of C K (c) and edge of N K (d); (e) Top view of the model structure calculated by DFT: Ni-N3C2 (Note: DFT calculation was performed on the model structure established by a single Ni atom in Ni-lusters); (f) Differential charge density distribution of Ni-cluster/CN (Note: the yellow and blue areas indicate electron accumulation and consumption, respectively).
Fig. 4. (a) Schematic diagram of the Mott-Schottky contact of Ni-cluster/CN (Φ: work function, EF: Fermi level, EC: conduction band, EV: valence band); (b) Measured work functions via UV photoelectron spectroscopy analysis; (c) Ni 2p high-resolution XPS spectra of Ni(OH)2NPs/CN and Ni-cluster/CN; (d) Photocatalytic HER rate of CN, Ni(OH)2NPs/CN, and Ni-cluster/CN; (e) Cyclic stability experiment of photocatalytic hydrogen evolution; (f) Photocatalytic hydrogen evolution of Ni-cluster/CN driven by sunlight.
Fig. 5. (a) PL spectra of CN and Ni-cluster/CN at 375 nm; (b) Time-resolved photoluminescence spectra; (c) Transient photocurrent response; (d) EIS Nyquist EIS’; (e) Schematic diagram of the interface interaction between Ni-clusters and CN and Ni-cluster/CN photocatalytic reaction hydrogen production mechanism.
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