Citation: Kouhua Sun, Jun Shen, Qinqin Liu, Hua Tang, Mingyi Zhang, Syed Zulfiqar, Chunsheng Lei. Synergistic effect of Co(II)-hole and Pt-electron cocatalysts for enhanced photocatalytic hydrogen evolution performance of P-doped g-C₃N₄[J]. Chinese Journal of Catalysis, ;2020, 41(1): 72-81. doi: S1872-2067(19)63430-3 shu

Synergistic effect of Co(II)-hole and Pt-electron cocatalysts for enhanced photocatalytic hydrogen evolution performance of P-doped g-C₃N₄

Kouhua Sun ^a,c, ,
Jun Shen ^b ,
Qinqin Liu ^c,d ,
Hua Tang ^c ,
Mingyi Zhang ^d ,
Syed Zulfiqar ^c ,
Chunsheng Lei ^a

a School of Environment & Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China;
b School of Pharmacy, Suzhou Vocational Health College, Suzhou 215009, Jiangsu, China;
c School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;
d Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin 150025, Heilongjiang, China

Received Date: 30 May 2019
Revised Date: 22 June 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (51672113) and QingLan Project Foundation of Jiangsu Province (201611).

g-C₃N₄ is a metal-free semiconductor and a potential candidate for photocatalytic H₂ production, however, the drawbacks, rapid recombination rate and limited migration efficiency of photogenerated carriers, restrict its photocatalytic activity. Herein, Co(Ⅱ) as a hole cocatalyst modified P-doped g-C₃N₄ were successfully prepared to ameliorate the separation efficiency of photoinduced carriers and enhance the photocatalytic hydrogen production. The photocatalytic results demonstrated that the P-doped g-C₃N₄ (PCN) exhibited higher photocatalytic activity compared with pure g-C₃N₄, while Co(Ⅱ)/PCN photocatalyst exhibited further enhancement of photocatalytic performance. The proposed possible mechanism based on various characterizations is that P-doping can modulate the electronic structure of g-C₃N₄ to boost the separation of photogenerated-e^- and h⁺; while the synergistic effect of both Co(Ⅱ) (as hole cocatalyst) and Pt (as electron cocatalyst) can not only lead to the directional shunting of photogenerated e⁺-h^- pairs, but further accelerate the photogenerated electrons transfer to Pt in order to join the photocatalytic reduction process for hydrogen evolution. As a result, the transportation and separation of photoinduced carriers were accelerated to greatest extent in the Pt/Co(Ⅱ)/PCN photocatalyst.
- Photocatalytic H₂ production,
- Hole cocatalyst,
- Electron cocatalyst,
- P-doped g-C₃N₄
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Synergistic effect of Co(II)-hole and Pt-electron cocatalysts for enhanced photocatalytic hydrogen evolution performance of P-doped g-C3N4

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Synergistic effect of Co(II)-hole and Pt-electron cocatalysts for enhanced photocatalytic hydrogen evolution performance of P-doped g-C₃N₄