Two-Dimensional Cobalt Phosphate Hydroxide Nanosheets: A New Type of High-Performance Electrocatalysts with Intrinsic CoO6 Lattice Distortion for Water Oxidation
學年 108
學期 1
出版（發表）日期 2019-09-24
作品名稱 Two-Dimensional Cobalt Phosphate Hydroxide Nanosheets: A New Type of High-Performance Electrocatalysts with Intrinsic CoO6 Lattice Distortion for Water Oxidation
作品名稱（其他語言）
著者 Xiuming Bu, ChaoLung Chiang, Renjie Wei, Zebiao Li, You Meng, ChunKuo Peng, Yu-Chang Lin, Yangyang Li, Yan-Gu Lin, Kwok Sum Chan, Johnny C Ho
單位
出版者
著錄名稱、卷期、頁數 ACS applied materials & interfaces, 11, 38633−38640
摘要 Despite the recent advances in electrochemical water splitting, developing cost-effective and highly efficient electrocatalysts for oxygen evolution reaction (OER) still remains a substantial challenge. Herein, two-dimensional cobalt phosphate hydroxides (Co5(PO4)2(OH)4) nanosheets, a unique stacking-disordered phosphate-based inorganic material, are successfully prepared via a facile and scalable method for the first time to serve as a superior and robust electrocatalyst for water oxidation. On the basis of the detailed characterization (e.g., X-ray absorption near-edge structure and X-ray photoelectron spectroscopy), the obtained nanosheets consist of special zigzag CoO6 octahedral chains along with intrinsic lattice distortion and excellent hydrophilicity, in which these factors contribute to the highly efficient performance of prepared electrocatalysts for OER. Specifically, Co5(PO4)2(OH)4 deposited on glassy carbon electrode (loading amount ≈0.553 mg cm–2) can exhibit an unprecedented overpotential of 254 mV to drive a current density of 10 mA cm–2 with a small Tafel slope of 57 mV dec–1 in alkaline electrolytes, which outperforms the ones of CO3(PO4)2 (370 mV) and Co(OH)2 (360 mV) as well as other advanced catalysts. Evidently, this work has opened a new pathway to the rational design of promising metal phosphate hydroxides toward the efficient electrochemical energy conversion.
關鍵字 Co5(PO4)2(OH)4, Nanosheet, Lattice distortion, Electrocatalyst, Oxygen evolution reaction
語言 en_US
ISSN
期刊性質 國外
收錄於 SCI SSCI Scopus
產學合作
通訊作者 Yan-Gu Lin & Johnny C Ho
審稿制度 1
國別 USA
公開徵稿
出版型式 ,電子版
SDGS 夥伴關係,可負擔的潔淨能源,產業創新與基礎設施