首页|Phosphorus modified hollow, porous Nickel-Cobalt oxides nanocubes with heterostructure for oxygen evolution reaction in alkaline
Phosphorus modified hollow, porous Nickel-Cobalt oxides nanocubes with heterostructure for oxygen evolution reaction in alkaline
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NSTL
Elsevier
? 2022The development of efficient non-noble-metal based catalysts for oxygen evolution reaction is the crucial issue to promote electrolytic water technology. Herein, an effective phosphorus-modified hollow porous Nickel-Cobalt oxides nanocube was prepared by thermal oxidation and partial phosphorization processes. The optimal P-NiO/NiCo2O4 nanocube disclosed remarkable electrochemical activity for OER in 1.0 M KOH with a low overpotential of 290 mV at 10 mA cm?2, a low Tafel slope of 49.6 mV dec?1, and good long-life stability for 20 h. Based on the experimental and theoretical calculation results, the introduction of P was proved to be the key to the excellent electrochemical activity for OER. P doping could optimize the adsorption of the intermediates, decrease the energy barrier and change the rate-determining step. Meanwhile, the P-dopant could modulate the electronic structure and enhance the conductivity of NiO/NiCo2O4. In addition, hollow, porous hybrid structure and oxygen vacancies could increase the number of active sites exposed, and facilitate the ion transport. The present work provides a valuable strategy to design transition-metal oxide based electrocatalysts with enhanced electrocatalytic performances by controlling partial P doping.
HeterostructureNickel-Cobalt oxidesOxygen evolution reactionP dopingPrussian blue analogs
Key Laboratory of Oil & Gas Fine Chemicals Ministry of Education Xinjiang University
Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes Qinghai Institute of Salt Lakes Chinese Academy of Sciences
NSTL
Elsevier
