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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/114959


    Title: Preferential Cation Vacancies in Perovskite Hydroxide for the Oxygen Evolution Reaction
    Authors: Dawei Chen;Man Qiao;Ying‐Rui Lu;Li Hao;Dongdong Liu;Prof. Chung‐Li Dong;Prof. Yafei Li;Prof. Shuangyin Wang
    Keywords: defects;electrocatalysts;oxygen;evolution;reaction;perovskites;vacancies
    Date: 2018-05-17
    Issue Date: 2018-09-20 12:11:20 (UTC+8)
    Abstract: The oxygen evolution reaction (OER) is an ideal model to study the relationship between the activity and the surface properties of catalysts. Defect engineering has been extensively developed to tune the electrocatalytic activity for OER. Compared to the anion vacancies in metal oxides, cation vacancies are more challenging to selectively generate, and the insight into the structure and activity of cation vacancies‐rich catalysts are lacked. Herein, using SnCoFe perovskite hydroxide as a precursor, abundant Sn vacancies on the surface were preferentially produced by Ar plasma. Sn vacancies could be preferentially produced as confirmed by the X‐ray absorption spectra, probably owing to the lower lattice energy and weaker chemical bonds of Sn(OH)4. The Sn vacancies promoted the exposure of active CoFe sites, resulting in an amorphous surface layer, modulated the conductivity, and thus enhanced the OER performance.
    Relation: Angewandte Chemie 57(28), p.8691-8696
    DOI: 10.1002/anie.201805520
    Appears in Collections:[Graduate Institute & Department of Physics] Journal Article

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