不同晶型MnO_(2)纳米阵列的可控合成及其电催化析氧性能  

Crystalline Form Controlled Synthesis of MnO_(2) Nanoarrays for Electrocatalytic Oxygen Evolution Performance

作　　者：黄乐珩 程高[1,2,3] 赵英霞 谢启星 孙钺 唐诗昌 孙明[1,2,3] 余林[1,2,3] HUANG Le‑Heng;CHENG Gao;ZHAO Ying‑Xia;XIE Qi‑Xing;SUN Yue;TANG Shi‑Chang;SUN Ming;YU Lin(Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China;Guangdong Key Laboratory of Plant Resources Biorefining,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China;Guangzhou Key Laboratory of Clean Transportation Energy Chemistry,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学轻工化工学院,广东省教育厅清洁化学技术重点实验室,广州510006 [2]广东工业大学轻工化工学院,广东省植物资源生物炼制重点实验室,广州510006 [3]广东工业大学轻工化工学院,广州市清洁交通能源化学重点实验室,广州510006

出　　处：《无机化学学报》2022年第2期333-343,共11页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21576054);广东省自然科学基金(No.2019B1515120087);广东省普通高校基础研究与应用基础研究重点项目(No.2018KZDXM031)资助。

摘　　要：采用一步水热法,通过改变反应温度和硫酸的用量,在碳纸(CFP)表面可控合成了α‑MnO_(2)纳米线和δ‑MnO_(2)纳米片阵列,研究了MnO_(2)纳米阵列的电催化析氧反应(OER)性能。结果表明,在碱性介质中,α‑MnO_(2)纳米线阵列的OER活性优于δ‑MnO_(2)纳米片阵列,在电流密度为10 mA·cm^(-2)时,α‑MnO_(2)纳米线阵列的析氧过电位为444 mV(δ‑MnO_(2)纳米片的过电位为522 mV)。通过X射线光电子能谱的表征分析可知,更高含量的Mn^(3+)和表面更丰富的氧空位浓度是α‑MnO_(2)纳米线阵列催化活性更高的原因。Two kinds of MnO_(2) nanoarrays,includingα‑MnO_(2) nanowires andδ‑MnO_(2) nanosheets,were synthesized on carbon fiber paper(CFP)via the one‑step hydrothermal method by changing the temperature and the addition of sulfuric acid,respectively.Moreover,the oxygen evolution reaction(OER)properties for the MnO_(2) nanoarrays were studied.The results showed that the performance ofα‑MnO_(2) nanowires outperformedδ‑MnO_(2) nanosheets in alkaline medium and the overpotential ofα‑MnO_(2) was 444 mV under 10 mA·cm^(-2) current density(the overpotential ofδ‑MnO_(2) was 522 mV).According to the analysis of X‑ray photoelectron spectroscopy,the higher content of Mn^(3+)and more abundant oxygen vacancies on the surface are the reasons for the higher catalytic activity ofα‑MnO_(2) nanowires.

关 键 词：二氧化锰 纳米阵列 晶型 析氧反应 电催化 

分 类 号：O614.711[理学—无机化学]