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- Title
Molybdenum and Phosphorous Dual-Doped, Transition-Metal-Based, Free-Standing Electrode for Overall Water Splitting.
- Authors
Ali, Usman; Sohail, Kamran; Yuqi Liu; Xiaodan Yu; Shuangxi Xing
- Abstract
Water splitting using earth-abundant, low-cost, highly efficient, transition-metal-based electrocatalysts with high activity and stability is inevitable for sustainable energy development. Herein, a molybdenum (Mo) and phosphorous (P) co-doped highly efficient and durable electrocatalyst is grown on nickel foam (P-NiCo2O4/CoMoO4/NF, for simplicity G-3) for hydrogen and oxygen evolution reactions (HER and OER, respectively). The dual doping of Mo and P prompts the formation of nanosheet array structures and modifies the surface electronic states, which subsequently enhance the active sites, facilitate the charge transfer, and accelerate the reaction kinetics. As a result, the G-3 sample requires a low overpotential of 78.7 mV and 248.6 mV to reach a current density of 25 mAcm-2 for the HER and OER, respectively. Furthermore, a cell voltage of 1.729 V is required at 100 mAcm-2, and the catalyst demonstrates long-term stability of 54 h for overall water splitting.
- Subjects
MOLYBDENUM; HYDROGEN evolution reactions; ELECTROCATALYSTS; OXYGEN evolution reactions; SURFACE states; ENERGY development; CHARGE transfer; CHEMICAL kinetics
- Publication
ChemElectroChem, 2021, Vol 8, Issue 9, p1612
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.202100217