教師資料查詢 | 類別: 期刊論文 | 教師: 謝忠宏 HSIEH, CHUNG-HUNG (瀏覽個人網頁)

標題:A matrix of heterobimetallic complexes for interrogation of hydrogen evolution reaction electrocatalysts
學年106
學期1
出版(發表)日期2017/10/12
作品名稱A matrix of heterobimetallic complexes for interrogation of hydrogen evolution reaction electrocatalysts
作品名稱(其他語言)
著者Ghosh,Pokhraj; Ding,Shengda; Chupik,Rachel B.; Quiroz,Manuel; Hsieh,Chung-Hung; Bhuvanesh,Nattami; Hall,Michael B.; Darensbourg,Marcetta Y
單位
出版者
著錄名稱、卷期、頁數Chemical Science 8(12), p.8291-8300
摘要Experimental and computational studies address key questions in a structure–function analysis of bioinspired electrocatalysts for the HER. Combinations of NiN2S2 or [(NO)Fe]N2S2 as donors to (η5-C5H5)Fe(CO)+ or [Fe(NO)2]+/0 generate a series of four bimetallics, gradually “softened” by increasing nitrosylation, from 0 to 3, by the non-innocent NO ligands. The nitrosylated NiFe complexes are isolated and structurally characterized in two redox levels, demonstrating required features of electrocatalysis. Computational modeling of experimental structures and likely transient intermediates that connect the electrochemical events find roles for electron delocalization by NO, as well as Fe–S bond dissociation that produce a terminal thiolate as pendant base well positioned to facilitate proton uptake and transfer. Dihydrogen formation is via proton/hydride coupling by internal S–H+⋯−H–Fe units of the “harder” bimetallic arrangements with more localized electron density, while softer units convert H−⋯H−via reductive elimination from two Fe–H deriving from the highly delocalized, doubly reduced [Fe2(NO)3]− derivative. Computational studies also account for the inactivity of a Ni2Fe complex resulting from entanglement of added H+ in a pinched –Sδ−⋯H+⋯δ−S− arrangement.
關鍵字
語言英文(美國)
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式,電子版,紙本
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