Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10656872 | Electrochimica Acta | 2018 | 26 Pages |
Abstract
It is essential to design an oxygen evolution reaction (OER) electrocatalyst with smaller overpotential to improve water electrolyzer efficiency. Here, we report a simple method to incorporate nickel hexacyanoferrate into the three-dimensional (3D) graphene aerogel (GA) structure (NiHCF/GA), through which we have derived OER active FeNi-P/GA catalyst by heating with the phosphide source. Structural characterization data disclosed that the NiHCF derived FeNi-P particles were uniformly distributed in the 3D GA network. The obtained FeNi-P/GA catalyst exhibits precursor ([K3Fe(CN)6] and NiCl2) concentration-dependent electrocatalytic activity towards OER. Linear sweep voltammetry (LSV) study shows OER on the optimized FeNi-P/GA catalyst surface commenced at 1.46â¯V vs. RHE and demands only 280â¯mV overpotential to achieve the benchmark current density of 10â¯mA.cmâ2. Also, the FeNi-P/GA catalyst displayed a Tafel slope of 43â¯mV.decâ1, suggesting its superior OER performance in alkaline condition.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Alam Venugopal Narendra Kumar, Yinghao Li, Hongjie Yu, Shuli Yin, Hairong Xue, You Xu, Xiaonian Li, Hongjing Wang, Liang Wang,