文档介绍：
硅纳米线阵列耦合钴基催化剂中性析氧光
阳极#
张烨1,赵春松1,崔柏2,李建保1,3,林红1**
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(1. 清华大学材料科学与工程学院,新型陶瓷与精细工艺国家重点实验室,北京,100084;
2. 材料科学与工程系,伊利诺伊大学,厄班,美国,61801;
3. 海南省硅锆钛资源综合开发与利用重点实验室,海南大学材料与化工学院,海口,570228)
摘要:垂直取向的硅纳米线阵列可以通过在含有钴离子的前驱体中进行一步水热生长,在表
面与钴基氢氧化物共催化剂耦合。该功能化的复合电极可以在中性水溶液条件下进行光电
化学析氧。通过 TiCl4 溶液的前处理和退火处理可以有效防止硅纳米线在溶液中外加偏压
条件下的表面钝化。光电化学实验证明,裸露的硅纳米线在高过电位下很快失效,而经过
钝化硅纳米线表现出良好的稳定性,耦合共催化剂的硅纳米线阵列电极则具有最佳的光电
化学析氧性能。
关键词:硅纳米线阵列,钝化,光电化学析氧,中性
中图分类号:O
Silicon Nanowires Coupled with a Cobalt-based Catalyst for
Water Oxidation in Neutral Electrolyte
ZHANG Ye1, ZHAO Chunsong1, CUI Bai2, LI Jianbao1,3, LIN Hong1
(1. State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and
Engineering, Tsinghua University, Beijing, China;
2. Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign,
1304 W. Green Street, Urbana, IL 61801, United States;
3. Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources,
Hainan University, Haikou, China, 570228)
Abstract: Vertically aligned silicon nanowires (SiNWs) were coupled with a cobalt hydroxide
co-catalyst by means of hydrothermal growth. The functionalized SiNWs proved to be robust
photoanode for photoelectrochemical water oxidation in neutral electrolyte. A TiCl4 solution
pre-treatment and subsequent annealing would provide