Ni-Fe (Oxy)hydroxide Modified Graphene Additive Manufactured (3D-Printed) Electrochemical Platforms as an Efficient Electrocatalyst for the Oxygen Evolution Reaction
Ni-Fe (Oxy)hydroxide Modified Graphene Additive Manufactured (3D-Printed) Electrochemical Platforms as an Efficient Electrocatalyst for the Oxygen Evolution Reaction
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DOI：
10.1002/celc.201901541
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发表时间：
2019-11-18
期刊：
影响因子：
4
通讯作者：
Banks, Craig E.
中科院分区：
文献类型：
--
作者：
dos Santos, Pamyla L.;Rowley-Neale, Samuel J.;Banks, Craig E.
我们证明，聚乳酸（PLA）/石墨烯增材制造（3D打印）电极（Gr/艾姆斯）电沉积Ni-Fe（氧）氢氧化物可以有效地催化析氧反应（OER）。X射线光电子能谱（XPS）结合原子力显微镜（AFM）和针尖增强拉曼光谱（TERS）分析了Ni-Fe（OH）氧化层的组成和深度。通过改变电沉积溶液中镍和铁的浓度来调整所得电催化表面的组成，这产生了优化的艾姆斯OER性能（在0.1 M KOH内）。从具有10% Fe含量的Ni-Fe（氧）氢氧化物观察到最佳OER性能，其显示OER起始电位和过电位分别为+1.47 V（相对于RHE）和519 mV。这些值与多晶铱（+ 1.43 V（vs. RHE））和约1.43 V（vs. RHE）的值相当。413 mV），以及比裸/未改性的AME具有显著更低的正电性。这项工作对于设计、制造和调制增材制造电极至关重要。
We demonstrate that polylactic acid (PLA)/graphene additive manufactured (3D-printed) electrodes (Gr/AMEs) electrodeposited with Ni-Fe (oxy)hydroxide can efficiently catalyse the oxygen evolution reaction (OER). X-ray photoelectron spectroscopy (XPS) depth profiling combined with Atomic Force Microscopy (AFM) and Tip Enhanced Raman Spectroscopy (TERS) deduced the composition and depth of the Ni-Fe (oxy)hydroxide layer. The composition of the resulting electrocatalytic surfaces are tailored through altering the concentrations of nickel and iron within the electrodeposited solutions, which give rise to optimised AMEs OER performance (within 0.1 M KOH). The optimal OER performance was observed from a Ni-Fe (oxy)hydroxide with a 10 % content of Fe, which displayed an OER onset potential and overpotential of+1.47 V (vs. RHE) and 519 mV, respectively. These values arecomparable to that of polycrystalline Iridium (+ 1.43 V (vs. RHE) and ca. 413 mV), as well as being significantly less electropositive than a bare/unmodified AME. This work is essential for those designing, fabricating and modulating additive manufactured electrodes.