Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 268, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118742
Keywords
Hollow graphene; g-C3N4; Hydrogen evolution; Directional electron transfer; Apparent potential difference
Funding
- National Natural Science Foundation of China [21871155, 51972177]
- Natural Science Foundation of Ningbo City [2018A610067]
- K. C. Wong Magna Fund in Ningbo University, Fan 3315 Plan, and Yongjiang Scholar Plan
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g-C3N4 was in situ rooted into hollow graphene (g-C3N4@HG) for photocatalytic H2O dissociation into H-2 by vacuum-filling thermal polymerization. Characterizations and DFT calculations reveal that deviation of graphene (GR) into HG results in the activation of carbon n electrons, and the apparent potential difference between inner and outer surfaces of HG boosts charge directional transfer from the rooted g-C3N4 to HG. H-2 evolution efficiency of g-C3N4@HG is 1.43 mmol.g(-1)h(-1) without any noble metal as cocatalyst under visible irradiation, which is even more than 2.86, and 1.72 times that of g-C3N4 with 3 wt.% Pt, and g-C3N4/GR with 1 wt.% Pt, respectively. Results in the field of solar energy conversion supply a novel strategy to boost directional charge transfer for H-2 evolution by utilizing apparent potential difference of HG.
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