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Defect-rich and ultrathin CoOOH nanolayers as highly efficient oxygen evolution catalysts for photoelectrochemical water splitting
- Zhang, Beibei, Huang, Xiaojuan, Hu, Hongyan, Chou, Lingjun, Bi, Yingpu
- Journal of materials chemistry A 2019 v.7 no.9 pp. 4415-4419
- catalysts, electric current, lighting, oxygen production
- Herein, we have demonstrated that the plasma-exfoliation of CoOOH nanolayers (∼8 nm) into an ultrathin structure (∼2 nm) could significantly improve the PEC activities of BiVO₄ photoanodes. A photocurrent density of 4.9 mA cm⁻² and a charge separation efficiency of 89% have been achieved at 1.23 VRHE under AM 1.5G illumination, which are more than two-fold higher than those of pristine CoOOH/BiVO₄ photoanodes.