Facile deposition of cobalt oxide based electrocatalyst on low-cost and tin-free electrode for water splitting  

作　　者：Ali Han Pingwu Du 

机构地区：[1]Department of Materials Science and Engineering & Department of Chemistry & CAS Key Laboratory of Materials for Energy Conversion,University of Science and Technology of China

出　　处：《Journal of Energy Chemistry》2014年第2期179-184,共6页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21271166);the Fundamental Research Funds for the Central Universities;Program for New Century Excellent Talents in University(NCET);Young Thousand Talented Program

摘　　要：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.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.

关 键 词：ELECTROCATALYST water splitting water oxidation hydrogen production 

分 类 号：O643.36[理学—物理化学]