硼酸金属化合物的制备及其电催化活性

刘彦君; 金涛; 项民; 刁鹏

硼酸金属化合物的制备及其电催化活性

北京航空航天大学材料科学与工程学院, 北京 100191

基金项目: 国家自然科学基金资助项目(20973020,21173016)

详细信息

中图分类号: O 643.3
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出版历程
- 收稿日期: 2011-10-14
- 网络出版日期: 2013-01-31

Preparation of borate-based metal compounds and their electrocatalytic activities

School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 采用电化学沉积法于室温、碱性条件下在氧化铟锡(ITO,Indium Tin Oxide)表面制备了硼酸钴(CoBi)、硼酸镍(NiBi)、硼酸锰(MnBi)、硼酸铑(RhBi)、硼酸钯(PdBi)几种无定形的硼酸金属化合物薄膜,并对其形貌和结构进行表征,结果表明几种薄膜均为无定形结构.将这几种硼酸金属化合物应用于电化学催化水氧化制氧,对比其催化活性,发现CoBi,NiBi,RhBi具有较高的催化性能,而MnBi和PdBi催化活性较低.进一步研究硼酸pH值对CoBi电催化水分解的影响.发现硼酸有利于金属化合物的制备,pH7~11范围内,HBO₃^2-作为质子受体含量逐渐增大,能接受放氧过程产生的质子,促进催化水分解过程的进行.所得催化剂可自我修复,实现循环利用.
- 硼酸金属化合物 /
- 电化学沉积 /
- 电催化 /
- 水分解
Abstract: Borate-based metal compounds thin film such as cobalt-borate(CoBi), nickel-borate(NiBi), manganese-borate(MnBi), rhodium-borate(RhBi) and palladium-borate(PdBi) were prepared on the surface of indium tin oxide(ITO) through electrochemical method at room temperature in alkaline medium. These compounds were amorphous films by morphology and structure characterization. Comparing their catalytic activities in electrocatalytical water splitting for oxygen generation, CoBi, NiBi and RhBi show higher activity than MnBi and PdBi. Further research indicates that borate is beficial for the preparation of borate-based metal compounds, and as a proton acceptor, the concentration of HBO₃^2- rised gradually as pH increases from 7 to 11, HBO₃^2- can accept the proton produced from oxygen evolving process, improving the electrocatalytical water splitting. In addition, the as-synthesized catalysts could be self-repaired and recycled.
- borate-based metal compound /
- electrochemical deposition /
- electrochemical catalyzing /
- water splitting

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参考文献(16)

[1]	Fujishima A,Honda K.Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238(5358):37-38
[2]	陈启元,兰可尹,周澜.半导体光解水研究进展[J].材料导报,2005,19(1):20-23 Chen Qiyuan,Lan Keyin,Zhou Lan.Progress on semiconductor photocatalysts for water decomposition[J].Materials Review,2005,19(1):20-23(in Chinese)
[3]	Osterloh F E.Inorganic materials as catalysts for photochemical splitting of water[J].Chem Mater,2008,20(1):35-54
[4]	Kazuhiko M ,Kazunari D.Meeting the clean energy demand:nanostructure architectures for solar energy conversion[J].J Phys Chem C,2007,111(7):7851-7861
[5]	Bard A J,Fox M A.Artificial photosynthesis:solar splitting of water to hydrogen and oxygen[J].Acc Chem Res,1995,28(3):141-145
[6]	Sun Jianwei,Zhong D K,Gamelin D R.Composite photoanodes for photoelectrochemical solar water splitting[J].Energy Environ Sci,2010,3:1252-1261
[7]	Surendranath Y,Kanan M W,Nocera D G.Mechanistic studies of the oxygen evolution reaction by a cobalt-phosphate catalyst at neutral pH[J].J Am Chem Soc,2010,132(46):16501-16509
[8]	Kanan M W,Nocera D G.In situ formation of an oxygen-evolving catalyst in neutral water containing phosphate and Co²⁺[J].Science,2008,321(5892):1072-1075
[9]	Surendranath Y,Dincǎ M,Nocera D G.Electrolyte-dependent electrosynthesis and activity of cobalt-based water oxidation catalysts[J].J Am Chem Soc,2009,131(7):2615-2620
[10]	Lutterman D A,Surendranath Y,Nocera D G.A self-healing oxygen-evolving catalyst[J].J Am Chem Soc,2009,131(11):3838-3839
[11]	Kanan M W,Yano J,Surendranath Y,et.al.Structure and valency of a cobalt-phosphate water oxidation catalyst determined by in situ X-ray spectroscopy[J].J Am Chem Soc,2010,132(39):13692-13701
[12]	Mcalpin J G,Surendranath Y,Dinca M,et al.EPR evidence for Co(IV) species produced during water oxidation at neutral pH[J].J Am Chem Soc,2010,132(20):6882-6883
[13]	Zhong D K,Gamelin D R.Photoelectrochemical water oxidation by cobalt catalyst("Co-Pi")/α-Fe₂O₃ composite photoanodes:oxygen evolution and resolution of a kinetic bottleneck[J].J Am Chem Soc,2010,132(12):4202-4207
[14]	Zhong D K,Sun Jianwei,Inumaru H,et al.Solar water oxidation by composite catalyst/α-Fe₂O₃ photoanodes[J].J Am Chem Soc,2009,131(17):6086-6087
[15]	Steinmiller E M P,Choi K S.Photochemical deposition of cobalt-based oxygen evolving catalyst on a semiconductor photoanode for solar oxygen production[J].Proc Natl Acad Sci,2009,106(49):20633-20636
[16]	Dincǎ M,Surendranath Y,Nocera D G.Nickel-borate oxygen-evolving catalyst that functions under benign conditions[J].Proc Natl Acad Sci,2010,107(23):10337-10341