A one-step synthesis of Co-P-B/rGO at room temperature with synergistically enhanced electrocatalytic activity in neutral solution

作者：Li, Panpan; Jin, Zhaoyu; Xiao, Dan^*

来源：Journal of Materials Chemistry A, 2014, 2(43): 18420-18427.

DOI：10.1039/c4ta03962a

• HYDROGEN EVOLUTION REACTION
• WATER-OXIDATION CATALYSIS
• GRAPHITE OXIDE
• GRAPHENE SHEETS
• EDGE SITES
• NANOSHEETS
• REDUCTION
• PHOSPHATE
• ELECTROSYNTHESIS
• COMPLEXES

Two-dimensional (2D) nanocomposites are fabricated on reduced graphene oxide (Co-P-B/rGO) via a one-step method at room temperature. By tuning the molar ratio of phosphorus and boron sources in reactants, outstanding bi-functional catalysts for the oxygen evolution reaction (OER) can be obtained with an extremely low onset overpotential of 50 mV and a small Tafel slope of 68 mV dec(-1), as well as for the hydrogen evolution reaction (HER) with onset overpotential of 168 mV and a Tafel slope of 82 mV dec(-1) in neutral solution (pH = 7.0). The improved performance could be due to the high specific area, efficient electron transfer and the synergistic effects of P and B. We also tested these catalysts in seawater for both OER and HER, which showed favorable activities. This approach to form 2D structures on a reduced graphene oxide may inspire the development of more extraordinary electrochemical catalysts and devices.

• 出版日期2014
• 单位四川大学