CN113912132B - 缺陷异质结FeS2-Fe7S8的制备方法 - Google Patents

缺陷异质结FeS2-Fe7S8的制备方法 Download PDF

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CN113912132B
CN113912132B CN202111129402.8A CN202111129402A CN113912132B CN 113912132 B CN113912132 B CN 113912132B CN 202111129402 A CN202111129402 A CN 202111129402A CN 113912132 B CN113912132 B CN 113912132B
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CN113912132A (zh
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李忠成
王文嫔
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Qingdao University of Science and Technology
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Abstract

本发明涉及缺陷异质结FeS2‑Fe7S8的制备方法,具体的说是将六水合硫酸亚铁铵((NH4)2Fe(SO4)2·6H2O)溶于水,然后加入铜试剂(C5H10NS2Na·3H2O),水热合成缺陷异质结FeS2‑Fe7S8,该缺陷异质结FeS2‑Fe7S8室温下实现电催化水氧化。

Description

缺陷异质结FeS2-Fe7S8的制备方法
技术领域
本发明涉及缺陷异质结FeS2-Fe7S8的制备方法,属于材料的制备领域。
背景技术
化石能源的大量使用给人们带来了严重的污染,另外作为不可再生资源,其大量消耗造成了能源危机。发展新型能源取代化石能源成为人们研究的前沿方向。其中水氧化制氧反应是现在研究的热点之一。目前,常用的水氧化反应的催化剂是Ru基催化剂。贵金属的稀缺性和高价格限制了其广泛应用。
目前,人们已经实现了过渡金属碳化物、过渡金属磷化物、过渡金属氮化物、过渡金属氧化物质、过渡金属硫化物等材料有效催化水氧化。其中,硫化铁作为地壳中含量较高的材料,研究其催化水氧化,引起了科学家的广大关注。导电性弱限制了硫化铁在催化水氧化领域的应用。人们通过对硫化铁进行掺杂、负载、纳米化等手段,研究了其催化水氧化性能。例如:Kuila等电沉积方法合成了Ni掺杂的FeS2材料,其在电催化水氧化反应中表现出优于 RuO2催化剂的性能(ACS Sustainable Chemistry&Engineering 2019,7,1801-18026)。Liu等用硫脲为S源对N-CNTs@Ni3Fe进行硫化,得到了N-CNTs@NiS2/Fe7S8,其在电催化水氧化反应中,保持24h的稳定性(Chemical Communications,2020,56,1489)。Xi等利用甲酰胺通过剥离技术合成了丝状界面FeS2/NiS2复合纳米材料,其在催化水氧化反应中,过电势为233mV时达到10mA/cm2(Chinese Journal of Catalysis,2019,40,43-51)。目前,人们并没有实现将FeS2和Fe7S8合成为异质结结构。因此,合成缺陷异质结FeS2-Fe7S8对催化水氧化具有重要的意义。
发明内容:
本发明旨在提供缺陷异质结FeS2-Fe7S8的制备方法和其在电催化水氧化领域的应用。
基于上述目的,本发明所涉及的技术方案如下:
1)缺陷异质结FeS2-Fe7S8的制备方法:将0.5-1.2g六水合硫酸亚铁铵 ((NH4)2Fe(SO4)2·6H2O)溶于30-90mL水,然后加入0.4-0.8g铜试剂 (C5H10NS2Na·3H2O),200-260℃水热反应6-18h,经离心洗涤后,干燥得到缺陷异质结FeS2-Fe7S8
2)当电压为1.53V时,缺陷异质结FeS2-Fe7S8电催化水氧化反应电流密度达到10mA/cm2
本发明具有如下优点:
1)将六水合硫酸亚铁铵((NH4)2Fe(SO4)2·6H2O)溶于水,然后加铜试剂(C5H10NS2Na·3H2O),水热合成了缺陷异质结FeS2-Fe7S8,开发了缺陷异质结FeS2-Fe7S8制备的新原料。
2)本发明简单易操作的特点。
附图说明:
图1是缺陷异质结FeS2-Fe7S8的XRD表征结果。
具体实施方式
下列实施例用来进一步说明本发明,但不因此而限制本发明。
实施例1
缺陷异质结FeS2-Fe7S8具体制备过程如下:将0.78g六水合硫酸亚铁铵 ((NH4)2Fe(SO4)2·6H2O)溶于60mL水,然后加入0.45g铜试剂(C5H10NS2Na·3H2O),240℃水热反应12h,经离心洗涤后,干燥得到产物。
实施例2
将0.5g六水合硫酸亚铁铵((NH4)2Fe(SO4)2·6H2O)溶于30mL水,然后加入0.4g铜试剂(C5H10NS2Na·3H2O),200℃水热反应6h,经离心洗涤后,干燥得到产物。
实施例3
将1.2g六水合硫酸亚铁铵((NH4)2Fe(SO4)2·6H2O)溶于90mL水,然后加入0.8g铜试剂(C5H10NS2Na·3H2O),260℃水热反应18h,经离心洗涤后,干燥得到产物。
实施例4
将0.5g六水合硫酸亚铁铵((NH4)2Fe(SO4)2·6H2O)溶于90mL水,然后加入0.8g铜试剂(C5H10NS2Na·3H2O),260℃水热反应18h,经离心洗涤后,干燥得到产物。
实施例5
将实施例1制成浆液,涂于镍电极上,利用CHI760E工作站,三电极体系催化水氧化,在1.0mol/L KOH电解液中,当电压为1.53V时,电流密度达到10mA/cm2

Claims (2)

1.缺陷异质结FeS2-Fe7S8的制备方法,具体的说是将六水合硫酸亚铁铵((NH4)2Fe(SO4)2·6H2O)溶于水,然后加入铜试剂,水热合成缺陷异质结FeS2-Fe7S8,该缺陷异质结FeS2-Fe7S8室温下实现电催化水氧化;缺陷异质结FeS2-Fe7S8由如下步骤制得:将0.5-1.2 g六水合硫酸亚铁铵((NH4)2Fe(SO4)2·6H2O)溶于30-90 mL水,然后加入0.4-0.8 g铜试剂,200-260 ℃水热反应6-18 h,经离心洗涤后,干燥得到缺陷异质结FeS2-Fe7S8
2.按照权利要求1所述的方法,其特征在于:
将缺陷异质结FeS2-Fe7S8电催化水氧化,当电压为1.53 V时,缺陷异质结FeS2-Fe7S8电催化水氧化反应电流密度达到10 mA/cm2
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