NiCoP Nanoparticles as Efficient Electrocatalyst for Oxygen Evolution Reaction in an Alkaline Solution

作者：Li, Yuhao^*; Tian, Yanping; Yan, Yuhua; Chang, Haizhou; Ouyang, Ruizhuo; Miao, Yuqing^*

来源：International Journal of Electrochemical Science, 2016, 11(12): 9917-9927.

DOI：10.20964/2016.12.21

• NiCoP
• bimetal phosphide
• electrocatalyst
• water oxidation

Water splitting can acquire clean energy. To enhance the water splitting ability, electrocatalysts qualify high catalytic ability and low cost are need to be explored. Herein, a bimetal phosphide (NiCoP) nanomaterial is reported as an efficient electrocatalyst for water oxidation. The ternary nickel cobalt phosphide nanoparticles were synthesized from the solution-phase reaction of organic Co and Ni precursors with trioctylphosphine. The nanoparticle size is 18 +/- 5 nm. After annealing, the catalytic ability of NiCoP is significantly enhanced. The overpotential decreased from 480 to 330 mV vs RHE at 10 mA cm(-2) in 1 mol dm(-3) KOH alkaline solution. When hydrophilic carbon nanotubes (CNTs) mixed with the NiCoP to form hybrid NiCoP-CNTs, the overpential further decreased from 330 to 320 mV vs RHE at 10 mA cm(-2). The Tafel slopes of ca. 69 and 52 mV are found for annealed NiCoP and NiCoP-CNTs, respectively. The stability test of NiCoP-CNTs also shown the remarkable catalytic activity for long-term operation.

• 出版日期2016-12
• 单位上海理工大学