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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
ISSN0022-2461
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
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.
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