顺序电沉积策略制备铜铁复合双功能电催化剂的研究
Sequential electrodeposition strategy for preparation of copper-iron composite bi-functional electrocatalysts
为改善铁在电催化水分解过程中导电性差的问题,通过顺序电沉积策略制备铜铁复合双功能电催化剂,并探究电沉积顺序对导电性和催化性能的影响。利用电化学沉积法在泡沫镍基底(NF)上制备了5种不同的催化剂(Fe/NF、Cu/NF、Cu/Fe/NF、Fe/Cu/NF和(Fe+Cu)/NF),并进行形貌和性能分析。SEM表征结果表明,沉积的铁纳米片层具有高度有序的3D开放网络结构,可为后续铜沉积提供稳定的附着点。电化学测试结果表明,与Fe/Cu/NF和(Fe+Cu)/NF相比,Cu/Fe/NF具有更好的电催化活性和稳定性。在二电极测试中,Cu/Fe/NF可在1.65 V的低电压下进行碱性全水解,表现出优异的双功能催化效果。
In order to improve the poor conductivity of iron in the process of electrocatalytic water splitting,copper-iron composite bi-functional electrocatalysts are prepared via sequential electrodeposition strategy,and the effects of electrodeposition sequence on the conductivity and catalytic performance of the catalysts prepared are explored.Five kinds of catalysts,including Fe/NF,Cu/NF,Cu/Fe/NF,Fe/Cu/NF and (Fe+Cu)/NF,are prepared on nickel foam (NF) substrates through electrochemical deposition method,and their morphology and properties are analyzed.SEM characterization results show that the deposited iron-nanosheets layer has a highly ordered 3D open network structure,which can provide a stable attachment point for subsequent copper deposition.The electrochemical testing results show that Cu/Fe/NF has better electrocatalytic activity and stability than Fe/Cu/NF and (Fe+Cu)/NF.In two-electrode tests,Cu/Fe/NF can undergo alkaline total water splitting at a low voltage of 1.65 V,showing an excellent bi-functional catalytic effect.
顺序电沉积 / 导电性 / 水分解 / 双功能电催化剂 / 铜铁复合材料
sequential electrodeposition / conductivity / water splitting / bi-functional electrocatalyst / copper-iron composites
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山东省自然科学基金(ZR2022QB132)
山东省自然科学基金(ZR2021QB203)
菏泽学院博士基金(XY21BS19)
菏泽学院博士基金(XY21BS18)
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