Journal
ACS CATALYSIS
Volume 7, Issue 10, Pages 6464-6470Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.7b01823
Keywords
bifunctional electrocatalysts; Ni/NiO; photogenerated carriers; heterostructure; water electrolysis
Categories
Funding
- National Natural Science Foundation of China [21422104]
- Natural Science Foundation of Tianjin City [16JCZDJC30600]
Ask authors/readers for more resources
The development of a facile and general strategy to simultaneously enhance the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities of bifunctional electrocatalysts is of great importance for practical applications. However, current strategies are usually restricted to monofunctional electrocatalysts owing to the opposite redox process at cathode and anode. Herein, we present a photo generated-carrier-driven strategy to enhance the electrocatalytic HER and OER activities of transition-metal/semiconductor bifunctional electrocatalysts. The Ni/NiO heterostructured ultrathin nanosheet array supported on Ni foam (denoted as Ni/NiO-NF) is chosen as the model metal/semiconductor bifunctional electrocatalyst and exhibits 10- and 2.6-fold enhancement of mass activity for HER and OER, respectively, after exposure to light irradiation. The increase in water-splitting activities can be attributed to the transfer of photogenerated electrons from excited NiO to HER-active Ni and the accelerating formation of OER-active Ni-III/IV, respectively.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available