文献类型：期刊文献

英文题名：Facile synthesis of IrO2 nanoparticles decorated @ WO3 as mixed oxide composite for outperformed oxygen evolution reaction

作者：Tariq, Muhammad[1];Zaman, Waqas Qamar[1];Wu, Yiyi[1];Nabi, Azeem[2];Abbas, Zain[1];Iqbal, Waheed[3];Sun, Wei[1];Hao, Zhang[1];Zhou, Zhen Hua[1];Cao, Limei[1];Yang, Ji[1,4]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Univ Gujrat, Dept Phys, Hafiz Hayat Campus, Gujrat, Pakistan;[3]Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Guangdong, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2019

卷号：44

期号：59

起止页码：31082

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20194507634059);WOS:【SCI-EXPANDED(收录号:WOS:000501653500027)】；

基金：This research is based on the work supported by the National Natural Science Foundation of China (51778229).

语种：英文

外文关键词：Oxygen evolution reaction; Electrochemical catalyst; Mixed oxides; Iridium oxide; Tungsten oxide; Water splitting

摘要：Oxygen evolution reaction (OER) electrocatalysts play the critical role in efficiency and durability for different hydrogen production systems. We have successfully synthesized the earth abundant WO3 coupled with IrO2 as mixed oxide composite by a facile two-step chemical method. 50% reduction in noble metal contents (IW-50) followed by two times enhancement in activity, four-folds increase in bulk mass specific activity along with the stability of mixed oxide composite as compared to state -of -the art IrO2 catalyst are affirmed. Superior performance of mixed oxide composites are perceived due to four times increase in electrochemical surface area, reduction of Tafel slope, four-fold increase of turn over frequency, electronic distortion in Ir-4f spectrum of IW-50 along with the bridging of lattice oxygen atoms between iridium and tungsten metals. We believe that it would open up the new avenues for effective utilization of noble metal with high valence tungsten metal in corrosive environment. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.