罗宇林,钱海霞,曾燮榕,谢盛辉,孙德恩.Fe82Nb6B12合金表面纳米多孔结构的形成及电催化析氢性能的研究[J].表面技术,2019,48(11):219-225.
LUO Yu-lin,QIAN Hai-xia,ZENG Xie-rong,XIE Sheng-hui,SUN De-en.Formation of Nanoporous Structures on Fe82Nb6B12 Alloy and Hydrogen Evolution Properties[J].Surface Technology,2019,48(11):219-225 |
| Fe82Nb6B12合金表面纳米多孔结构的形成及电催化析氢性能的研究 |
| Formation of Nanoporous Structures on Fe82Nb6B12 Alloy and Hydrogen Evolution Properties |
| 投稿时间：2019-04-04 修订日期：2019-11-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.11.023 |
| 中文关键词: 纳米晶 脱合金 非晶纳米结构 电催化析氢 非晶条带 |
| 英文关键词:nanocrystalline dealloying amorphous nanostructure hydrogen evolution amorphous ribbon |
| 基金项目:深圳市科技计划基础研究项目（JCYJ20160422143659258）；东莞市引进创新科研团队项目（2014607109）；深圳大学深圳市特种功能材料重点实验室开放基金资助项目（T201503）；国家自然科学基金（51771037） |
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| Author | Institution |
| LUO Yu-lin | 1.School of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China |
| QIAN Hai-xia | 1.School of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China |
| ZENG Xie-rong | 1.School of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China; 2.Janus Precision Components Co., Ltd, Dongguan 523878, China |
| XIE Sheng-hui | 1.School of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China |
| SUN De-en | 3.School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China |
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| 中文摘要: |
| 目的 增加条带表面积，提高电催化析氢活性。方法 采用真空激冷装置制备Fe82Nb6B12前驱体条带，通过控制铜辊转速得到α-Fe纳米晶/非晶双相结构。利用α-Fe纳米晶与非晶基体在0.5 mol/L H2SO4溶液中腐蚀性能的差异，通过脱合金法得到非晶纳米多孔结构。使用XRD、DSC、SEM、EDS等表征手段以及电化学测试方法，研究铜辊转速、脱合金时间对物相、成分、形貌及电催化析氢性能的影响。结果 1 kr/min样品完全晶化，2~3 kr/min样品为α-Fe纳米晶/非晶双相合金，且随着铜辊转速增大，前驱体条带中α-Fe纳米晶含量减少。脱合金后成功制备了非晶纳米多孔结构，铜辊转速越大，孔径越小，比表面积越小。4 kr/min样品为非晶态，脱合金后没有得到多孔结构。2 kr/min多孔结构的析氢性能最好，在电流密度为10 mA/cm2时的过电位为220 mV，塔菲尔斜率为105 mV/dec。结论 采用甩带法可以制备具有α-Fe纳米晶/非晶双相结构的Fe82Nb6B12合金。通过α-Fe纳米晶的选择性腐蚀，在条带表面得到纳米多孔结构，条带比表面积显著改善，从而提高了其析氢性能。 |
| 英文摘要: |
| The work aims to increase the surface area and improve the hydrogen evolution properties of Fe82Nb6B12 ribbons. Fe82Nb6B12 ribbons were prepared by vacuum quenching device and α-Fe from nanocrystal/amorphous biphasic structure was obtained by controlling the speed of the copper roller. With the corrosion difference of α-Fe nanocrystal/amorphous biphasic structure in 0.5 mol/L sulfuric acid, the amorphous nanoporous was fabricated by dealloying method. The effects of copper roll speed and dealloying time on phase, composition, morphology and hydrogen evolution performance of the samples were investigated with X-ray diffractometer (XRD), scanning electron microscope (SEM), differential scanning calorimetry (DSC) and electrochemical method. The 1 kr/min sample was almost fully crystallized. α-Fe nanocrystal /amorphous duplex alloy was successfully prepared at 2~3 kr/min. The content of α-Fe nanocrystals in the ribbon decreased with the increase of the copper roller speed. After dealloying, the amorphous nanoporous structure was successfully prepared. The larger the rotation speed of the copper roller was, the smaller the pore diameter and the smaller the specific surface area were. The 4 kr/min sample was amorphous, and no porous structure was observed after alloying. The 2 kr/min sample with porous structures exhibited the best hydrogen evolution performance, which delivered a current density of 10 mA/cm2 at overpotential of 220 mV with Tafel slope of 105 mV/dec. In general, the Fe82Nb6B12 alloy with α-Fe nanocrystal/amorphous dual-phase structure can be prepared through melt-spinning. By selective etching of α-Fe nanocrystals, an amorphous porous structure can be obtained, and the specific surface area of the ribbon is significantly increased, thereby improving the hydrogen evolution performance. |
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