(1. 陜西理工大學(xué) 材料科學(xué)與工程學(xué)院，漢中 723000；
2. 陜西理工大學(xué) 礦渣綜合利用環(huán)保技術(shù)國(guó)家地方聯(lián)合工程實(shí)驗(yàn)室，漢中 723000)
摘 要: 通過(guò)簡(jiǎn)單一步水熱法在泡沫鎳表面原位生長(zhǎng)多孔納米片自組裝成納米花結(jié)構(gòu)的FeS@Ni3S2/NF催化電極。借助 X 射線(xiàn)衍射儀(XRD)、X 射線(xiàn)光電子能譜(XPS)、透射電鏡(TEM)等進(jìn)行物相及結(jié)構(gòu)表征，并測(cè)試催化電極在1 mol/L KOH 溶液中的電催化析氧(OER)性能。電化學(xué)測(cè)試結(jié)果表明：FeS@Ni3S2/NF-1.2電極在100 mA·cm-2電流密度下僅需278 mV的過(guò)電位，且具有較低的Tafel斜率(22.71 mV/dec)，與純NF(493 mV，214.65 mV/dec)、純Ni3S2(327 mV，91.87 mV/dec)以及IrO2/NF(385 mV，172.93 mV/dec)相比，其優(yōu)勢(shì)明顯。證明具有獨(dú)特多孔結(jié)構(gòu)的FeS@Ni3S2/NF納米片自組裝成的納米花可以作為一種貴金屬基電催化劑的理想替代品。
關(guān)鍵字: Fe摻雜；自組裝納米花；電催化劑；析氧反應(yīng)
（1. School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China;
2. National and Local Joint Engineering Laboratory for Environmental Protection Technology for Comprehensive Utilization of Slag, Shaanxi University of Technology, Hanzhong 723000, China）
Abstract:FeS@Ni3S2/NF nanoflower assembled by porous nanosheet was in-situ grown on the surface of nickel foam (NF) by a simple one-step hydrothermal method. The phase composition and microstructure of the samples were characterized by XRD, XPS and TEM. The electrocatalytic oxygen evolution (OER) performance of the samples was also measured in 1 mol/L KOH solution. The electrochemical test results show that FeS@Ni3S2/NF-1.2 electrode exhibits an overpotential of 278 mV at the current density of 100 mA/cm2 with lower Tafel slope (22.71 mV/dec). Moreover, the catalytic activity is superior than that of pure NF (493 mV, 214.65 mV/dec), Ni3S2 (327 mV, 91.87 mV/dec) and IrO2/NF (385 mV, 172.93 mV/dec). The results prove that FeS@Ni3S2/NF nanoflower assembled by nanosheet with special porous structure can be used as a potential candidator to replace the precious metals electrocatalyst.
Key words: Fe-doping; self-assembling nano-flowers; electrocatalyst; oxygen evolution reaction
