纳米NiO-Y复合阴极材料的制备及微生物电解池催化产氢性能

王改; 薄琼; 杨冬花; 李玉鹏; 赵煜; 葛超

纳米NiO-Y复合阴极材料的制备及微生物电解池催化产氢性能

王改^1,,
薄琼¹,
杨冬花¹,
李玉鹏¹,
赵煜¹,
葛超²

1.
太原理工大学化学化工学院, 山西太原 030024
2.
太原理工大学轻纺工程学院, 山西晋中 030600

基金项目:

山西省自然科学基金 201701D121028

国家自然科学基金青年基金 21802101

详细信息

通讯作者:
YANG Dong-hua, Tel: 13546305881, E-mail: ydh1962@163.com

中图分类号: O643;TQ426
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- 文章访问数: 84
- HTML全文浏览量: 24
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2019-01-11
- 修回日期: 2019-04-23
- 网络出版日期: 2021-01-23
- 刊出日期: 2019-06-10

Synthesis and electrochemical evaluation of nano-NiO-Y composite cathode material for hydrogen evolution in microbial electrolysis cell

1.
College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
College of Textile Engineering, Taiyuan University of Technology, Jinzhong 030600, China

Funds:

the Natural Science Foundation of Shanxi Province, China 201701D121028

National Natural Science Foundation of China 21802101

摘要

摘要: 在Y分子筛的溶胶反应体系中加入碳球，经老化、水热晶化反应得到纳米Y分子筛，通过等体积浸渍（incipient-wetness impregnation，IWI）方式负载镍盐前驱体，经焙烧制备纳米NiO-Y复合材料，采用XRD、SEM、TEM、XPS、TG-DTG和N₂吸附-脱附等手段对其物理化学性质进行表征。结果表明，合成的NiO-Y复合材料样品的晶粒粒径为500 nm，具有微-介孔多级孔道结构。总比表面积达到774.3 m²/g，孔容为0.495 cm³/g，有利于暴露更多的活性位。通过线性扫描和塔菲尔曲线电化学测试评价发现，当镍盐负载量为30%（质量分数）时，纳米NiO-Y复合材料作为微生物电解池阴极具有较高的电催化活性。在运行周期内，样品的最大析氢电流密度达到22.87 A/m²，产气总量中H₂含量占73.71%，产氢效率为0.393 m³/（m³·d），与Pt/C阴极产氢效率相近。
- 纳米NiO-Y复合材料 /
- 多级孔 /
- 活性位 /
- 微生物电解池 /
- 阴极材料
Abstract: Nano Y zeolites were synthesized by adding carbon spheres into the synthesis sol of Y zeolites subjected to aging and hydrothermal crystallization; nickel-salt precursors were then loaded by using an incipient-wetness impregnation (IWI) method. After calcination, the nano-NiO-Y composite were then characterized by means of XRD, SEM, TEM, XPS, TG-DTG, and N₂ adsorption-desorption techniques and its performance as the cathode material for hydrogen evolution in microbial electrolysis cell was then investigated. The results show that the nano-NiO-Y composite has a crystal size of 500 nm of size and multiple porous structure including micro and mesopores; the total surface area and pore volume of nano-NiO-Y composites are 774.3 m²/g and 0.495 cm³/g, respectively. The electrochemical tests of linear scanning voltammetry and Tafel plots show that as microbial electrolytic cell (MEC) cathode, the nano-NiO-Y composite with a nickel-salt loading of 30% exhibits high electrocatalytic activity. In a continuous operation cycle, the largest hydrogen evolution current density of the nano-NiO-Y composites reaches 22.87 A/m², and the H₂ content is about 73.71% in total gas. The hydrogen production efficiency is 0.393 m³/(m³·d), comparable to that of Pt/C cathode.
- nano-NiO-Y composites /
- multiple porous /
- active sites /
- microbial electrolysis cell /
- cathode materials

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图 1 样品的XRD谱图

Figure 1 XRD patterns of nano-Y (a) and nano-NiO-Y3 (b) composite

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图 2 样品的SEM及TEM照片

Figure 2 SEM image of nano-Y (a) and TEM images of nano-Y (b) and nano-NiO-Y3 composite (c)

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图 3 纳米复合材料的TG-DTG曲线

Figure 3 TG-DTG curves of the nano-NiO-Y3 nanocomposite

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图 4 纳米NiO-Y3复合材料的Ni 2p、O 1s XPS谱图

Figure 4 Ni 2p (a) and O 1s (b) XPS spectra of nano-NiO-Y3 composite

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图 5 纳米NiO-Y3复合材料N₂吸附-脱附曲线和孔径分布

Figure 5 N₂ adsortion-desortion isotherms and pore size distribution of nano-NiO-Y3 composite

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图 6 不同样品的线性扫描图

Figure 6 Linear scanning voltammetry (LSV) curves of various NiO-Y samples

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图 7 不同样品的塔菲尔斜率

Figure 7 Tafel plots of different samples

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图 8 三种阴极MEC的产气量和气体成分

Figure 8 Gas production and composition of the three cathodes in the microbial electrolysis cell

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表 1 样品的孔结构参数

Table 1 Pore structure parameters of the nano-NiO-Y3 composite

Sample	A_BET/(m²·g^-1)	A_mic/(m²·g^-1)	A_meso/(m²·g^-1)	v_total/(cm³·g^-1)	v_micro/(cm³·g^-1)
NiO-Y3	744.3	679.4	64.9	0.495	0.350

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