Oxygen vacancy induced defect dipoles in BiVO<sub>4</sub> for photoelectrocatalytic partial oxidation of methane

doi:10.1038/s41467-024-53426-8

IMR OpenIR

	Oxygen vacancy induced defect dipoles in BiVO₄ for photoelectrocatalytic partial oxidation of methane
	Li, Xianlong 1; Wang, Zhiliang 1; Sasani, Alireza 2; Baktash, Ardeshir 1; Wang, Kai 1; Lu, Haijiao 1; You, Jiakang 1; Chen, Peng 1; Chen, Ping 1; Bao, Yifan 1; Zhang, Shujun 3; Liu, Gang 4,5; Wang, Lianzhou 1
通讯作者	Wang, Zhiliang(zhiliang.wang@uq.edu.au) ; Wang, Lianzhou(l.wang@uq.edu.au)
	2024-10-23
发表期刊	NATURE COMMUNICATIONS
卷号	15 期号:1 页码:9
摘要	A strong driving force for charge separation and transfer in semiconductors is essential for designing effective photoelectrodes for solar energy conversion. While defect engineering and polarization alignment can enhance this process, their potential interference within a photoelectrode remains unclear. Here we show that oxygen vacancies in bismuth vanadate (BiVO4) can create defect dipoles due to a disruption of symmetry. The modified photoelectrodes exhibit a strong correlation between charge separation and transfer capability and external electrical poling, which is not seen in unmodified samples. Applying poling at -150 Volt boosts charge separation and transfer efficiency to over 90%. A photocurrent density of 6.3 mA cm-2 is achieved on the photoelectrode after loading with a nickel-iron oxide-based cocatalyst. Furthermore, using generated holes for methane partial oxidation can produce methanol with a Faradaic efficiency of approximately 6%. These findings provide valuable insights into the photoelectrocatalytic conversion of greenhouse gases into valuable chemical products. The design of effective photoelectrodes for solar energy conversion relies on optimizing charge separation and transfer, which remain a challenge. In this study, the authors demonstrate that an external poling treatment can create a built-in electric field in bismuth vanadate photoelectrodes, thereby facilitating efficient charge transport for water oxidation and methane conversion.
资助者	Australian Research Council ; Australian Research Council through its DECRA ; UQ Graduate School
DOI	10.1038/s41467-024-53426-8
收录类别	SCI
语种	英语
资助项目	Australian Research Council[DE210100930] ; Australian Research Council[DE230101712] ; Australian Research Council[DP200101900] ; Australian Research Council[DP230100462] ; Australian Research Council[FT230100251] ; Australian Research Council[FL190100139] ; Australian Research Council through its DECRA ; UQ Graduate School
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001341113300024
出版者	NATURE PORTFOLIO
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/190976
专题	中国科学院金属研究所
通讯作者	Wang, Zhiliang; Wang, Lianzhou
作者单位	1.Univ Queensland, Australian Inst Bioengn & Nanotechnol, Nanomat Ctr, Sch Chem Engn, St Lucia, Qld 4072, Australia 2.Univ Liege, CESAM, QMAT, Phys Theor Mat, Liege, Belgium 3.Univ Wollongong, Inst Superconducting & Elect Mat, Fac Engn & Informat Sci, Wollongong, NSW 2500, Australia 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 5.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Xianlong,Wang, Zhiliang,Sasani, Alireza,et al. Oxygen vacancy induced defect dipoles in BiVO₄ for photoelectrocatalytic partial oxidation of methane[J]. NATURE COMMUNICATIONS,2024,15(1):9.
APA	Li, Xianlong.,Wang, Zhiliang.,Sasani, Alireza.,Baktash, Ardeshir.,Wang, Kai.,...&Wang, Lianzhou.(2024).Oxygen vacancy induced defect dipoles in BiVO₄ for photoelectrocatalytic partial oxidation of methane.NATURE COMMUNICATIONS,15(1),9.
MLA	Li, Xianlong,et al."Oxygen vacancy induced defect dipoles in BiVO₄ for photoelectrocatalytic partial oxidation of methane".NATURE COMMUNICATIONS 15.1(2024):9.