教師資料查詢 | 類別: 期刊論文 | 教師: 董崇禮 CHUNG-LI DONG (瀏覽個人網頁)

標題:Defect-induced Pt-Co-Se coordinated sites with highly asymmetrical electronic distribution for boosting oxygen-involving electrocatalysis
學年107
學期2
出版(發表)日期2019/02/01
作品名稱Defect-induced Pt-Co-Se coordinated sites with highly asymmetrical electronic distribution for boosting oxygen-involving electrocatalysis
作品名稱(其他語言)
著者L. Zhuang; Y. Jia; H. Liu; X. Wang; R. K. Hocking; H. Liu; J. Chen; L. Ge; L. Zhang; M. Li; C. L. Dong; Y. C. Huang; S. Shen; D. Yang; Z. Zhu; X. Yao
單位
出版者
著錄名稱、卷期、頁數Advanced Materials 31(4), 1805581
摘要Rational design and synthesis of hetero‐coordinated moieties at the atomic scale can significantly raise the performance of the catalyst and obtain mechanistic insight into the oxygen‐involving electrocatalysis. Here, a facile plasma‐photochemical strategy is applied to construct atomically coordinated Pt–Co–Se moieties in defective CoSe2 (CoSe2−x ) through filling the plasma‐created Se vacancies in CoSe2−x with single Pt atomic species (CoSe2−x ‐Pt) under ultraviolet irradiation. The filling of single Pt can remarkably enhance the oxygen evolution reaction (OER) activity of CoSe2. Optimal OER specific activity is achieved with a Pt content of 2.25 wt% in CoSe2−x ‐Pt, exceeding that of CoSe2−x by a factor of 9. CoSe2−x ‐Pt shows much better OER performance than CoSe2−x filled with single Ni and even Ru atomic species (CoSe2−x ‐Ni and CoSe2−x ‐Ru). Noticeably, it is general that Pt is not a good OER catalyst but Ru is; thus the design of active sites for electrocatalysis at an atomic level should follow a different intrinsic mechanism. Mechanism studies unravel that the single Pt can induce much higher electronic distribution asymmetry degree than both single Ni and Ru, and benefit the interaction between the Co sites and adsorbates (OH*, O*, and OOH*) during the OER process, leading to a better OER activity.
關鍵字
語言英文
ISSN1521-4095
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別德國
公開徵稿
出版型式,電子版
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