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国家自然科学基金(21271166)

作品数:2 被引量:1H指数:1
相关作者:韩阿丽杜平武更多>>
相关机构:中国科学技术大学更多>>
发文基金:国家自然科学基金更多>>
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Facile deposition of cobalt oxide based electrocatalyst on low-cost and tin-free electrode for water splitting
2014年
Facile deposition of a water-splitting catalyst on low-cost electrode materials could be attractive for hydrogen production from water and solar energy conversion. Herein we describe fast electrodeposition of cobalt-based water oxidation catalyst (Co-WOC) on simple graphite electrode for water splitting, The deposition process is quite fast, which reaches a plateau in less than 75 min and the final ctLrrent density is -1.8 mA/cm2 under the applied potential of 1.31 V at pH --7.0. The scanning electron microscopy (SEM) study shows the formation of nanometer-sized particles (10-100 nm) on the surface of the electrode after only 2 min and micrometer-sized particles (2-5/zm) after 90 rain of electrolysis. X-ray photoelectron spectroscopy (XPS) data demonstrate the as-synthesized ex-situ catalyst mainly contains Co2+ and Co3+ species incorporating a substantial amount of phosphate anions. These experiments suggest that cost-efficient cobalt oxide materials on graphite exhibit alluring ability for water splitting, which might provide a novel method to fabricate low-cost devices for electrochemical energy storage.
Ali HanPingwu Du
关键词:ELECTROCATALYST
铂-钴双核配合物:合成、光物理性质及可见光驱动分解水制氢(英文)被引量:1
2013年
合成了一种铂钴双核配合物,[Pt(tBu3tpy)([C≡C-C6H4N])-Co(dmgH)2PyCl,(5)](tBu3tpy为4,4′,4″-叔丁基-2,2″6′,2″三联吡啶,C6H4N为吡啶基,dmgH为丁二酮肟,Py为吡啶),并研究其光物理和光化学性质。通过对配合物进行紫外、荧光光谱表征,表明该铂配合物在可见光区显示金属到配体电荷转移(MLCT)的特点及钴配合物猝灭其发光的性质。在电子给体三乙醇胺(TEOA)存在下,这种双核配合物可实现光驱动分解水产氢,光催化产氢性质受很多因素影响,比如pH值,溶剂等。通过质谱和紫外光谱表征表明这种双金属核分子催化剂不稳定,铂光敏剂和钴催化剂会在光照过程会分离。
韩阿丽杜平武
关键词:产氢
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