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Abnormal Cathodic Photocurrent Generated on an n-Type FeOOH Nanorod-Array Photoelectrode
Chen, Hongjun; Lyu, Miaoqiang; Liu, Gang; Wang, Lianzhou; Wang, LZ (reprint author), Univ Queensland, Sch Chem Engn, Nanomat Ctr, St Lucia, Qld 4072, Australia.; Wang, LZ (reprint author), Univ Queensland, Australian Inst Bioengn & Nanotechnol, St Lucia, Qld 4072, Australia.; Liu, G (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2016-03-24
发表期刊CHEMISTRY-A EUROPEAN JOURNAL
ISSN0947-6539
卷号22期号:14页码:4802-4808
摘要A simple, wet-chemical method for the synthesis of an FeOOH nanorod-array photoelectrode on fluorine-doped tin oxide (FTO) glass is reported. Nanorods of diameter about 35nm and length about 300nm have been vertically grown on an FTO substrate. Upon calcination, the FeOOH phase could be easily converted to a hematite structure while maintaining the shape of the nanorod array. An interesting abnormal cathodic photocurrent is generated on the FeOOH nanorod-array photoelectrode under illumination, which is totally different from that obtained on a calcined hematite photoelectrode under the same experimental conditions. The cathodic photocurrent density generated on the FeOOH photoelectrode can also be tuned by applying an electrochemical anodic or cathodic treatment. Detailed analysis has revealed that higher valence state Fe-IV species in the FeOOH photoelectrode play an important role in sacrificing the photoexcited electrons for generation of the cathodic photocurrent. Comparison between the FeOOH and hematite photoelectrodes allows for a better understanding of the interplay between crystal structure, surface reactions, and photocurrent. The findings on this new abnormal phenomenon could also provide guidance for the design of new types of semiconducting photoelectrochemical devices.
部门归属[chen, hongjun ; lyu, miaoqiang ; wang, lianzhou] univ queensland, sch chem engn, nanomat ctr, st lucia, qld 4072, australia ; [chen, hongjun ; lyu, miaoqiang ; wang, lianzhou] univ queensland, australian inst bioengn & nanotechnol, st lucia, qld 4072, australia ; [liu, gang] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词Iron Oxides Nanorod Arrays Nanostructures Photocurrent Water Splitting
学科领域Chemistry
资助者Australian Research Council; University of Queensland
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75931
专题中国科学院金属研究所
通讯作者Wang, LZ (reprint author), Univ Queensland, Sch Chem Engn, Nanomat Ctr, St Lucia, Qld 4072, Australia.; Wang, LZ (reprint author), Univ Queensland, Australian Inst Bioengn & Nanotechnol, St Lucia, Qld 4072, Australia.; Liu, G (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Chen, Hongjun,Lyu, Miaoqiang,Liu, Gang,et al. Abnormal Cathodic Photocurrent Generated on an n-Type FeOOH Nanorod-Array Photoelectrode[J]. CHEMISTRY-A EUROPEAN JOURNAL,2016,22(14):4802-4808.
APA Chen, Hongjun.,Lyu, Miaoqiang.,Liu, Gang.,Wang, Lianzhou.,Wang, LZ .,...&Liu, G .(2016).Abnormal Cathodic Photocurrent Generated on an n-Type FeOOH Nanorod-Array Photoelectrode.CHEMISTRY-A EUROPEAN JOURNAL,22(14),4802-4808.
MLA Chen, Hongjun,et al."Abnormal Cathodic Photocurrent Generated on an n-Type FeOOH Nanorod-Array Photoelectrode".CHEMISTRY-A EUROPEAN JOURNAL 22.14(2016):4802-4808.
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