Role of surface composition upon the photocatalytic hydrogen production of Cr-doped and La/Cr-codoped SrTiO3

IMR OpenIR

	Role of surface composition upon the photocatalytic hydrogen production of Cr-doped and La/Cr-codoped SrTiO3
	Xu, Xiaoxiang; Lv, Meilin; Sun, Xiaoqin; Liu, Gang; Xu, XX (reprint author), Tongji Univ, Dept Chem, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
	2016-07-01
发表期刊	JOURNAL OF MATERIALS SCIENCE
ISSN	0022-2461
卷号	51 期号:13 页码:6464-6473
摘要	Surface properties play a vital role in many heterogeneous catalytic reactions, particularly in photocatalytic water splitting, where photo-generated electron and holes must migrate to and be transferred at the very top surface of a photocatalyst. Here, we carried out a detailed investigation on the role of surface composition towards photocatalytic hydrogen production of perovskite-based materials, namely, Cr-doped and La/Cr-codoped SrTiO3. Our findings showed that a depletion of B site cations occurred at the surface of these high-temperature annealed samples and a severe diminishing of B site cations took place after introducing La cations at the A site. Although the presence of La helps to improve surface alkalinity and inhibit the formation of detrimental Cr6+ species, La/Cr-codoped sample showed a poor photocatalytic activity. Such a correlation between surface composition and photocatalytic activity suggests that surface tailoring or composition control is highly necessary in the design and development of these perovskite-based photocatalysts. Since surface rearrangements can be kinetically hindered at low temperatures, low temperature synthetic methods are therefore strongly preferred during the synthesis of these perovskite-based photocatalysts.
部门归属	[xu, xiaoxiang ; lv, meilin ; sun, xiaoqin] tongji univ, dept chem, shanghai key lab chem assessment & sustainabil, 1239 siping rd, shanghai 200092, peoples r china ; [liu, gang] chinese acad sci, inst met res, shenyang natl lab materials sci, 72 wenhua rd, shenyang 110016, peoples r china
学科领域	Materials Science
资助者	Young Scientists Fund of the National Natural Science Foundation of China [21401142]; Recruitment Program of Global Youth Experts (1000 plan); Shanghai Science and Technology Commission [14DZ2261100]; Fundamental Research Funds for the Central Universities
收录类别	sci
语种	英语
WOS记录号	WOS:000374678400033
引用统计	被引频次：47[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/321006/75816
专题	中国科学院金属研究所
通讯作者	Xu, XX (reprint author), Tongji Univ, Dept Chem, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
推荐引用方式 GB/T 7714	Xu, Xiaoxiang,Lv, Meilin,Sun, Xiaoqin,et al. Role of surface composition upon the photocatalytic hydrogen production of Cr-doped and La/Cr-codoped SrTiO3[J]. JOURNAL OF MATERIALS SCIENCE,2016,51(13):6464-6473.
APA	Xu, Xiaoxiang,Lv, Meilin,Sun, Xiaoqin,Liu, Gang,&Xu, XX .(2016).Role of surface composition upon the photocatalytic hydrogen production of Cr-doped and La/Cr-codoped SrTiO3.JOURNAL OF MATERIALS SCIENCE,51(13),6464-6473.
MLA	Xu, Xiaoxiang,et al."Role of surface composition upon the photocatalytic hydrogen production of Cr-doped and La/Cr-codoped SrTiO3".JOURNAL OF MATERIALS SCIENCE 51.13(2016):6464-6473.