<strong>CuO</strong>纳米阵列结构光阴极的制备及其光电化学分解水的性能

doi:10.11901/1005.3093.2021.314

材料研究学报

2022, Vol. 36

Issue (4): 241-249 DOI: 10.11901/1005.3093.2021.314

研究论文

本期目录 | 过刊浏览

CuO纳米阵列结构光阴极的制备及其光电化学分解水的性能

孟祥东¹^,², 甄超¹(

), 刘岗¹^,³, 成会明¹^,²^,⁴

^1.中国科学院金属研究所沈阳材料国家研究中心沈阳 10016
^2.上海科技大学物质科学与技术学院上海 201210
^3.中国科学技术大学材料科学与工程学院沈阳 10016
^4.清华-伯克利深圳学院深圳盖姆石墨烯研究中心深圳 518055

Controlled Synthesis of CuO Nanoarrays as Efficient Photocathodes for Photoelectrochemical (PEC) for Water Splitting

MENG Xiangdong¹^,², ZHEN Chao¹(

), LIU Gang¹^,³, CHENG Huiming¹^,²^,⁴

^1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^2.School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
^3.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
^4.Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China

引用本文:

孟祥东, 甄超, 刘岗, 成会明. CuO纳米阵列结构光阴极的制备及其光电化学分解水的性能[J]. 材料研究学报, 2022, 36(4): 241-249.
Xiangdong MENG, Chao ZHEN, Gang LIU, Huiming CHENG. Controlled Synthesis of CuO Nanoarrays as Efficient Photocathodes for Photoelectrochemical (PEC) for Water Splitting[J]. Chinese Journal of Materials Research, 2022, 36(4): 241-249.

全文: PDF(8203 KB) HTML

摘要:

用原位基体加热反应磁控溅射方法制备具有强捕光和电荷分离能力的CuO纳米阵列(CuO NAs)光阴极,并改变氧分压、基底温度、腔体压力以及溅射时间等参数调控其相组成、晶体形貌、晶体生长取向、晶面暴露、厚度以及电子结构。结果表明,结构优化的CuO NAs光阴极,其光电流密度可达2.4 mA·cm^-2。

关键词 ：无机非金属材料, 光电化学分解水, 磁控溅射, 氧化铜

Abstract：

Photocathode of CuO nanoarray (CuO NAS) with strong ability of light capture and charge separation capacity was fabricated by reactive magnetron sputtering with in-situ heating the substrate, while the phase composition, crystal morphology, crystal growth orientation, crystal face exposure, thickness and electronic structure of the films were controlled by changing oxygen partial pressure, substrate temperature, cavity pressure and sputtering time. The photocurrent density of the optimized CuO NAS photocathode is up to 2.4 mA·cm^-2.

Key words： inorganic non-metallic materials photoelectrochemical water splitting magnetron sputtering CuO

收稿日期: 2021-05-19

ZTFLH:

150.3045

基金资助:国家自然科学基金(51825204);国家自然科学基金(52072377);中国科学院前沿科学研究重点计划项目(拔尖青年科学家类别)(QYZDB-SSW-JSC039);中国科学院青年创新促进会(2020192)

作者简介: 孟祥东,男,1996年生,硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.314 或 https://www.cjmr.org/CN/Y2022/V36/I4/241

图1 制备CuO NAs光阴极过程的示意图

图2 氧分压不同的样品及其截面的SEM照片

图3 压力为1.0 Pa、基底温度为300oC,氧分压分别为6%,25%,50%,75%,94%样品的XRD谱

图4 压力为1.0 Pa,基底温度分别为100℃,200℃,300℃,400℃,500℃的CuO NAs光阴极及其截面的SEM照片

图5 压力为1.0 Pa,基底温度分别为100℃,200℃,300℃,400℃,500℃的CuO NAs光阴极的XRD谱和CuO的标准卡片

图6 压力为1.0 Pa、基底温度为300℃、溅射时间分别为15 min、30 min、60 min、90 min、120 min的CuO NAs光阴极及其截面的SEM照片

图7 压力为1.0 Pa,基底温度为300℃、溅射时间分别为15 min,30 min,60 min,90 min,120 min的CuO NAs光阴极的XRD谱

图8 基底温度为400℃,溅射时间为90 min,压力分别为1.0 Pa、1.5 Pa、4.1 Pa、8.5 Pa的CuO NAs光阴极及其截面的SEM照片

图9 基底温度为400℃,溅射时间为90 min,压力分别为1.0 Pa、1.5 Pa、4.1 Pa、8.5 Pa的CuO NAs光阴极的XRD谱

图10 制备压力为1.0 Pa,基底设定温度为300℃,溅射时间分别为15 min、30 min、60 min、90 min、120 min的CuO NAs光阴极的紫外和可见光吸收谱

图11 基底温度为400℃,溅射时间为90 min,压力分别为1.0 Pa、1.5 Pa、4.1 Pa、8.5 Pa的CuO NAs光阴极的紫外和可见光吸收谱以及对应的Tauc图

图12 压力为1.0 Pa,基底温度为300℃,氧分压分别为6%、25%、50%、75%、94%样品的光电流密度随施加电压的变化,电解液为0.1 mol/L KOH水溶液,电极面积为1 cm2

图13 压力为1.0 Pa、基底温度分别为100℃、200℃、300℃、400℃、500℃的CuO NAs光阴极的光电流密度与施加电压的关系,电解液为0.1 mol/L KOH水溶液,电极面积为1 cm2

图14 压力为1.0 Pa,基底温度为300℃,溅射时间分别为15 min、30 min、60 min、90 min、120 min的CuO NAs光阴极的光电流密度与电压的关系,电解液为0.1 mol/L KOH水溶液,电极面积为1 cm2

图15 基底定温度为400℃,溅射时间为90 min,压力分别为1.0 Pa、1.5 Pa、4.1 Pa、8.5 Pa的CuO NAs光阴极的线性极化曲线和光电流随时间的变化,电解液为0.1 mol/L KOH水溶液,电极电位为0.56 V(vs. RHE),电极面积为1 cm2

图16 基底温度为400℃、溅射时间为90 min、制备压力分别为1.0 Pa、1.5 Pa、4.1 Pa和8.5 Pa的CuO NAs光阴极的莫特-肖特基曲线

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