CN117512660A - 一种铱修饰的NiFe-LDH@NF的制备方法 - Google Patents
一种铱修饰的NiFe-LDH@NF的制备方法 Download PDFInfo
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- 229910052741 iridium Inorganic materials 0.000 title claims abstract description 28
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000006243 chemical reaction Methods 0.000 claims abstract description 57
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 40
- 239000006260 foam Substances 0.000 claims abstract description 38
- 238000001035 drying Methods 0.000 claims abstract description 24
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims abstract description 17
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004202 carbamide Substances 0.000 claims abstract description 17
- 239000000243 solution Substances 0.000 claims abstract description 15
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 14
- 239000011259 mixed solution Substances 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 13
- 150000002815 nickel Chemical class 0.000 claims abstract description 9
- 150000003839 salts Chemical class 0.000 claims abstract description 8
- 150000002503 iridium Chemical class 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 3
- 239000012498 ultrapure water Substances 0.000 claims abstract description 3
- 238000005303 weighing Methods 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims description 10
- YOLNUNVVUJULQZ-UHFFFAOYSA-J iridium;tetrachloride Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Ir] YOLNUNVVUJULQZ-UHFFFAOYSA-J 0.000 claims description 9
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical group [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims 2
- SPIFDSWFDKNERT-UHFFFAOYSA-N nickel;hydrate Chemical compound O.[Ni] SPIFDSWFDKNERT-UHFFFAOYSA-N 0.000 claims 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 claims 1
- 229910000457 iridium oxide Inorganic materials 0.000 claims 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical group [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 48
- 230000000694 effects Effects 0.000 abstract description 5
- 239000001257 hydrogen Substances 0.000 abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005868 electrolysis reaction Methods 0.000 abstract description 3
- 239000008367 deionised water Substances 0.000 description 38
- 229910021641 deionized water Inorganic materials 0.000 description 38
- 239000000463 material Substances 0.000 description 22
- 238000001291 vacuum drying Methods 0.000 description 17
- 230000002238 attenuated effect Effects 0.000 description 8
- 238000004090 dissolution Methods 0.000 description 8
- SZQUEWJRBJDHSM-UHFFFAOYSA-N iron(3+);trinitrate;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O SZQUEWJRBJDHSM-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- AOPCKOPZYFFEDA-UHFFFAOYSA-N nickel(2+);dinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O AOPCKOPZYFFEDA-UHFFFAOYSA-N 0.000 description 8
- 239000012456 homogeneous solution Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000002135 nanosheet Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical class [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 239000010411 electrocatalyst Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
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Abstract
本发明属于电解水产氢领域,具体公开了一种铱修饰的NiFe‑LDH@NF的制备方法,制备方法如下:S1.按照物质的量比为1~3:0.5~2:0.02~0.15:5~20:40~80称取铁盐、镍盐、氟化铵、尿素加入到超纯水中搅拌成均匀溶液。S2.将处理后的泡沫镍浸没在混合溶液置于反应釜中在一定水热温度下,水热时间3~24h进行水热反应。S3.将反应完毕的NiFe‑LDH@NF进行清洗烘干。S4.将铱盐超声溶解成均匀溶液后将NiFe‑LDH@NF完全浸入后置于反应釜中在一定水热温度下,水热时间3~24h进行水热反应。S5.将反应完毕的铱修饰的NiFe‑LDH@NF清洁烘干。此催化剂在碱性条件下表现出优异的活性和稳定性。此制备方法简单对设备要求低,环境友好,可重复性高,有望批量工业化生产。
Description
技术领域
本发明属于铱修饰水滑石催化剂领域,尤其涉及一种铱修饰的镍铁水滑石的制备方法催化剂及其制备方法。使其在碱性条件下有良好的电化学催化分解水产氧性能。
背景技术
全球能源危机矛盾日益突出。一方面,化石能源并不是取之不尽用之不竭,另一方面,化石能源的使用带来了很多环境污染问题。因此,寻找和替代化石能源势在必行。当前,氢能因为其具有不同于其他清洁能源的良好特性,从大多数清洁能源中脱颖而出,被科学家视作化石能源的理想替代能源。电解水产氢被认为是直接高效的产氢手段。然而,电解水反应的半反应析氧反应(OER反应)因其缓慢的动力学而大大降低了水分解的整体效率,因此,在阳极处发生的OER反应是水电解的速率决定步骤,寻找低成本、高效率降低过电势的电催化剂变得尤为重要。
层状氢氧化物(LDH)是一种典型的层状结构,其中主板层带正电荷,层间存在与层板平衡电荷的阴离子,水分子介于主板层间,常见的层间阴离子为CO32-、NO3-等,具被可调控性,这种电子特性使其在结构上具有灵活性。NiFe-LDH自身优秀的析氧反应表现在很早就被发现,但层状金属氢氧化物的通病是导电率较低,使得迫切需要将水滑石与导电材料进行复合来提高导电性。借助商业泡沫镍(NF)做基底构筑三维空间结构。通过一步水热法制得自支撑的NiFe-LDH/NF复合材料。为了进一步提升催化剂的OER活性,体系中需要进一步引入高活性催化剂或活性位点。贵金属Ir被认为是OER活性最高的物质之一。将少量的Ir负载在NiFe-LDH/NF上有望提高催化剂水分解的催化活性和稳定性,同时将成本控制在合理的范围。
但是,在现有技术中,通过直接浸渍法在NiFe-LDH/NF上负载铱(ACS Cat.2023,13,11195),由于无法高效的将Ir均匀分散在过渡金属层状双氢氧化物表面结合形成异质结构催化剂。而一步水热法虽然相对来说反应更加可控制,但是通常会使铱不仅负载在NiFe-LDH/NF表面,还会在水热过程中被生长的片层状NiFe-LDH所覆盖,一方面会浪费部分铱,一方面又限制铱直接与电解液接触而损失其活性。两步水热法可有效的将铱负载在NiFe-LDH/NF表面(Adv Energy Mater.2021,33,2101281),两部水热法不仅可以均匀的使铱负载,而且可以限制铱只存在于NiFe-LDH/NF表面。
发明内容
本发明针对目前此类催化剂贵金属用量大、均匀性差的问题,提了一种铱修饰的NiFe-LDH@NF的制备方法。通过两步水热反应制备出Ir铱修饰的NiFe-LDH@NF。应用于OER反应的催化剂。NiFe LDH纳米片可通过氢键吸附H2O分子,并通过获取电子将其裂解为吸附的H+和OH-离子,有助于加速水分子的吸附和解离。在NiFe LDH纳米片表面引入Ir后能够有效调节Ni和Fe原子的电子结构,优化中间体的能垒以加速催化动力学,提高催化剂的导电性以加快电子转移速率,增加活性位点的暴露,提高催化剂水分解的活性和稳定性。
本发明提供了一种铱修饰的NiFe-LDH@NF的制备方法。S1.按照物质的量比为1~3:0.5~2:0.02~0.15:5~20:40~80称取铁盐、镍盐、氟化铵、尿素加入到超纯水中搅拌成均匀溶液。S2.将处理后的泡沫镍浸没在混合溶液置于反应釜中在一定水热温度下,水热时间3~24h进行水热反应。S3.将反应完毕的NiFe-LDH@NF进行清洗烘干。S4.将铱盐超声溶解成均匀溶液后将NiFe-LDH@NF完全浸入后置于反应釜中在一定水热温度下,水热时间3~24h进行水热反应。S5.将反应完毕的铱修饰的NiFe-LDH@NF清洁烘干。即可得到铱修饰的NiFe-LDH@NF材料。
所述所述镍盐、铁盐、铱盐、氟化铵和尿素物质的量比优选为2:1:0.06:10:60。
所述镍盐在去离子水中的浓度为0.016mol/L~0.054mol/L,优选为0.032mol/L。
所述铁盐在去离子水中的浓度为0.008mol/L~0.32mol/L。
所述铱盐在去离子水中的浓0.32mmol/L~2mmol/L,优选为0.96mmol/L。
所述氟化铵在去离子水中的浓度为0.08mol/L~0.32mol/L,优选为0.16mol/L。
所述尿素在去离子水中的浓度为0.63mol/L~1.28mol/L,优选为0.96mol/L。
所述两步水热反应时间为3~24h,优选为反应6h。
所述洗涤为:用镊子将铱修饰的NiFe-LDH@NF现在去离子水中洗涤4~6次、无水乙醇中4~6次。
所述烘干为:在真空干燥箱中100℃烘干10~14h。优选为12h。
本发明有益效果:采用工艺简单、且反应可控制的两步水热法。大量的尿素和氟化铵作为插层剂,可以使水热开始阶段物料不集聚,使其趋向于形成层状结构,有利于活性位点的暴露。以泡沫镍为基底,泡沫镍做集流体,NiFe-LDH样品的纳米片层在NF基底上均匀扎根生长,巧妙地解决NiFe-LDH作为催化电极材料所存在的片层块状堆叠、导电性差及粘结稳定性差等主要问题。第二步水热可以使铱有效且均匀的负载在NiFe-LDH@NF表面,不但降低了铱的用量,且铱在NiFe-LDH@NF表面使镍与铁电子结构和配位状况受到界面效应的调节,使不同的电荷再分布,从而使OER中间体具有最佳吸附自由能,导致催化活性增强,提高了在碱性电解质中的OER性能。
附图说明
图1为实施例5中铱修饰的NiFe-LDH@NF材料的X射线衍射图谱;
图2为实施例5中铱修饰的NiFe-LDH@NF材料的扫描电镜照片。
图3为实施例5中铱修饰的NiFe-LDH@NF材料Ir元素的能谱图。
图4为实施例5中铱修饰的NiFe-LDH@NF材料的LSV图。
具体实施方式
实施例1
称取1.6mmol六水合硝酸镍、0.8mmol九水合硝酸铁、8mmol氟化铵、64mmol尿素随后置于烧杯中,加入80ml去离子水,磁力搅拌60min形成均匀溶液。将混合溶以及处理好的泡沫镍置于反应釜中放入100℃烘箱中反应3h。将反应完毕的负载着NiFe-LDH的泡沫镍用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。称取0.04mmol三氯化铱水合物,加入80ml去离子水超声溶解成均匀溶液后将负载着NiFe-LDH的泡沫镍完全浸入后置于反应釜中放入100℃烘箱中反应3h。将反应完毕的铱修饰的NiFe-LDH@NF用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。即可得到铱修饰的NiFe-LDH@NF材料。
在10mAcm-2的条件下过电位为241mv低于未掺杂Ir的NiFe-LDH@NF材料。且样品在进行5000次CV循环后性能无明显衰减。
实施例2
称取1.6mmol六水合硝酸镍、1.6mmol九水合硝酸铁、16mmol氟化铵、72mmol尿素随后置于烧杯中,加入100ml去离子水,磁力搅拌60min形成均匀溶液。将混合溶以及处理好的泡沫镍置于反应釜中放入100℃烘箱中反应6h。将反应完毕的负载着NiFe-LDH的泡沫镍用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。称取0.08mmol三氯化铱水合物,加入100ml去离子水超声溶解成均匀溶液后将负载着NiFe-LDH的泡沫镍完全浸入后置于反应釜中放入100℃烘箱中反应6h。将反应完毕的铱修饰的NiFe-LDH@NF用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。即可得到铱修饰的NiFe-LDH@NF材料。
在10mAcm-2的条件下过电位为228mv远低于未掺杂Ir的NiFe-LDH@NF材料。且样品在进行5000次CV循环后性能无明显衰减。
实施例3
称取1.6mmol六水合硝酸镍、2.4mmol九水合硝酸铁、24mmol氟化铵、80mmol尿素随后置于烧杯中,加入100ml去离子水,磁力搅拌60min形成均匀溶液。将混合溶以及处理好的泡沫镍置于反应釜中放入100℃烘箱中反应9h。将反应完毕的负载着NiFe-LDH的泡沫镍用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。称取0.16mmol三氯化铱水合物,加入100ml去离子水超声溶解成均匀溶液后将负载着NiFe-LDH的泡沫镍完全浸入后置于反应釜中放入100℃烘箱中反应9h。将反应完毕的铱修饰的NiFe-LDH@NF用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。即可得到铱修饰的NiFe-LDH@NF材料。
在10mAcm-2的条件下过电位为252mv低于未掺杂Ir的NiFe-LDH@NF材料。且样品在进行5000次CV循环后性能无明显衰减。
实施例4
称取1.6mmol六水合硝酸镍、3.2mmol九水合硝酸铁、32mmol氟化铵、88mmol尿素随后置于烧杯中,加入100ml去离子水,磁力搅拌60min形成均匀溶液。将混合溶以及处理好的泡沫镍置于反应釜中放入100℃烘箱中反应12h。将反应完毕的负载着NiFe-LDH的泡沫镍用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。称取0.18mmol三氯化铱水合物,加入100ml去离子水超声溶解成均匀溶液后将负载着NiFe-LDH的泡沫镍完全浸入后置于反应釜中放入100℃烘箱中反应12h。将反应完毕的铱修饰的NiFe-LDH@NF用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。即可得到铱修饰的NiFe-LDH@NF材料。
在10mAcm-2的条件下过电位为239mv低于未掺杂Ir的NiFe-LDH@NF材料。且样品在进行5000次CV循环后性能无明显衰减。
实施例5
称取3.2mmol六水合硝酸镍、1.6mmol九水合硝酸铁、16mmol氟化铵、128mmol尿素随后置于烧杯中,加入100ml去离子水,磁力搅拌60min形成均匀溶液。将混合溶以及处理好的泡沫镍置于反应釜中放入100℃烘箱中反应6h。将反应完毕的负载着NiFe-LDH的泡沫镍用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。称取0.096mmol三氯化铱水合物,加入100ml去离子水超声溶解成均匀溶液后将负载着NiFe-LDH的泡沫镍完全浸入后置于反应釜中放入100℃烘箱中反应6h。将反应完毕的铱修饰的NiFe-LDH@NF用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。即可得到铱修饰的NiFe-LDH@NF材料。
在10mAcm-2的条件下过电位为220mv低于未掺杂Ir的NiFe-LDH@NF材料。且样品在进行5000次CV循环后性能无明显衰减。
实施例6
称取3.2mmol六水合硝酸镍、1.6mmol九水合硝酸铁、64mmol氟化铵、128mmol尿素随后置于烧杯中,加入100ml去离子水,磁力搅拌60min形成均匀溶液。将混合溶以及处理好的泡沫镍置于反应釜中放入80℃烘箱中反应15h。将反应完毕的负载着NiFe-LDH的泡沫镍用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。称取0.096mmol三氯化铱水合物,加入100ml去离子水超声溶解成均匀溶液后将负载着NiFe-LDH的泡沫镍完全浸入后置于反应釜中放入80℃烘箱中反应15h。将反应完毕的铱修饰的NiFe-LDH@NF用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。即可得到铱修饰的NiFe-LDH@NF材料。
在10mAcm-2的条件下过电位为327mv低于未掺杂Ir的NiFe-LDH@NF材料。且样品在进行5000次CV循环后性能无明显衰减。
实施例7
称取3.2mmol六水合硝酸镍、1.6mmol九水合硝酸铁、64mmol氟化铵、128mmol尿素随后置于烧杯中,加入100ml去离子水,磁力搅拌60min形成均匀溶液。将混合溶以及处理好的泡沫镍置于反应釜中放入120℃烘箱中反应18h。将反应完毕的负载着NiFe-LDH的泡沫镍用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。称取0.096mmol三氯化铱水合物,加入100ml去离子水超声溶解成均匀溶液后将负载着NiFe-LDH的泡沫镍完全浸入后置于反应釜中放入120℃烘箱中反应18h。将反应完毕的铱修饰的NiFe-LDH@NF用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。即可得到铱修饰的NiFe-LDH@NF材料。
在10mAcm-2的条件下过电位为286mv低于未掺杂Ir的NiFe-LDH@NF材料。且样品在进行5000次CV循环后性能无明显衰减。
实施例8
称取5.4mmol六水合硝酸镍、3.2mmol九水合硝酸铁、64mmol氟化铵、128mmol尿素随后置于烧杯中,加入100ml去离子水,磁力搅拌60min形成均匀溶液。将混合溶以及处理好的泡沫镍置于反应釜中放入100℃烘箱中反应24h。将反应完毕的负载着NiFe-LDH的泡沫镍用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。称取0.24mmol三氯化铱水合物,加入100ml去离子水超声溶解成均匀溶液后将负载着NiFe-LDH的泡沫镍完全浸入后置于反应釜中放入100℃烘箱中反应24h。将反应完毕的铱修饰的NiFe-LDH@NF用去离子水缓慢冲刷3min后在100℃真空干燥箱中烘干12h。即可得到铱修饰的NiFe-LDH@NF材料。
在10mAcm-2的条件下过电位为268mv低于未掺杂Ir的NiFe-LDH@NF材料。且样品在进行5000次CV循环后性能无明显衰减。
Claims (5)
1.一种铱修饰的NiFe-LDH@NF的制备方法,其特征在于制备合成步骤如下:按照物质的量比为1~3:0.5~2:0.02~0.15:5~20:40~80称取铁盐、镍盐、氟化铵、尿素加入到超纯水中搅拌成均匀溶液;将处理后的泡沫镍浸没在混合溶液置于反应釜中在一定水热温度下,水热时间3~24h进行水热反应进行水热反应;将反应完毕的NiFe-LDH@NF进行清洗烘干;将铱盐超声溶解成均匀溶液后将NiFe-LDH@NF完全浸入后置于反应釜中在一定水热温度下,水热时间3~24h进行水热反应;将反应完毕的铱修饰的NiFe-LDH@NF清洁烘干。
2.根据权利要求1所述的制备方法,其特征在于:所述镍盐为硝酸镍或其水合物、氯化镍或其水合物、硫酸镍中的一种。
3.根据权利要求1所述的制备方法,其特征在于:所述铁盐为硝酸铁或其水合物、氯化铁或其水合物、硫酸铁中的一种。
4.根据权利要求1所述的制备方法,其特征在于:所述铱盐为三氯化铱水合物或氧化铱的一种。
5.根据权利要求1所述的制备方法所制得的铱修饰的NiFe-LDH@NF作为一种碱性OER催化剂。
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