Low-crystallinity B-Co3O4 Nano-particles for Electrocatalytic Nitrate to Ammonia
A simple precipitation calcination process was used to synthesize B-Co3O4 NPs and apply them as elec-trocatalytic reduction of nitrate by ammonia.Research has found that B-Co3O4 NPs have high electrocatalytic activi-ty and when the voltage is-0.8(V vs.RHE).It attains an impressive NH3 yield of 20 mg/(h·cm2)and 94％(FE).In NaOH(1 mol/L)solution containing 0.1 mol/L NaNO3.When the voltage is-0.6 V(vs.RHE),it cor-responds to a NH3 yield of 17.2 mg/(h.cm2)and 95％FE.The excellent electrochemical performance of electrode material B-Co3O4 NPs is attributed to the effective inhibition of hydrogen evolution reaction by B-O in the electro-catalytic process.The low crystallinity and special porous structure of B-Co3O4 NPs effectively improve the adsorp-tion and reduction activity of NO3,promoting electron transfer and transfer.
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