Fabrication of Ti/SnO_(x)/MnO_(2) anodes with enhanced catalytic performance for oxygen evolution reactions  

具有增强析氧催化性能Ti/SnO_(x)/MnO_(2)阳极的制备

作　　者：Ya CHEN Yuan-he JIANG Peng-hui PING Jiu-qing LIU Xi-chang SHI 陈亚;姜源鹤;平鹏辉;刘久清;石西昌(中南大学冶金与环境学院,长沙410083)

机构地区：[1]School of Metallurgy and Environment,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2025年第3期921-931,共11页中国有色金属学报(英文版)

摘　　要：This work is devoted to the development of a low cost dimensionally stable anode with high oxygen evolution catalytic activity for practical applications.For this purpose,a Ti/SnO_(x)/MnO_(2) anode was fabricated through an innovative strategy involving Sn electrodeposition,oxidation,and MnO_(2)-layer preparation.The structure of the anode was characterized,and the oxygen evolution performance was evaluated in a H_(2)SO_(4) solution.The results show that compared with the Ti/SnO_(2)/MnO_(2) anode prepared by the conventional brushing-annealing process,the Ti/SnO_(x)/MnO_(2) anode fabricated through the innovative procedure exhibits a lower oxygen evolution potential and a nearly 40%longer accelerated lifespan.The superior oxygen evolution performance of the Ti/SnO_(x)/MnO_(2) anode is attributed to the distinctive SnO_(x) intermediate layer fabricated through Sn electrodeposition followed by oxidation,which indicates the great potential of the anode as a dimensionally stable anode for metal electrowinning and hydrogen production by electrolysis,etc.为了开发具有高析氧催化活性的低成本形稳阳极,提出一种包括Sn电沉积、沉积层氧化及MnO_(2)层制备等工艺过程的形稳阳极制备新方法,并将其用于制备Ti/SnO_(x)/MnO_(2)阳极以进行材料结构表征以及在H_(2)SO_(4)溶液中进行析氧催化性能测试。结果表明,与采用传统刷涂-退火工艺制备的Ti/SnO_(2)/MnO_(2)阳极相比,采用该新工艺制备的阳极具有更低的析氧电势,且加速测试寿命提高了近40%。该阳极的优异性能得益于由Sn沉积层氧化转化而成的SnO_(x)中间层。该形稳阳极在金属电积及电解制氢等领域具有较大的应用潜力。

关 键 词：dimensionally stable anode oxygen evolution catalytic performance SnO_(2)intermediate layer MnO_(2)catalyst 

分 类 号：O64[理学—物理化学]