文献类型：期刊文献

英文题名：Effective Strain Engineering of IrO2 Toward Improved Oxygen Evolution Catalysis through a Catalyst-Support System

作者：Zhou, Zhenhua[1];Zaman, Waqas Qamar[1];Sun, Wei[1];Zhang, Hao[1];Tariq, Muhammad[1];Cao, Limei[1];Yang, Ji[1,2]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Environm Protect Key Lab Environm Risk Assessment, Meilong Rd 130, Shanghai, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China

年份：2019

卷号：6

期号：17

起止页码：4586

外文期刊名：CHEMELECTROCHEM

收录：;EI(收录号：20194107523724);WOS:【SCI-EXPANDED(收录号:WOS:000485947800031)】；

语种：英文

外文关键词：oxygen revolution reaction; noble metal; catalyst-support interaction; crystal lattice distortion; birnessite

摘要：A template-free, one-step synthesis of nano-IrO2 on a layered Mn-Co birnessite support was developed to induce the catalyst-support interaction. The IrO2 nanoparticles were prepared with inherent crystal lattice strain, which is derived from the Ir-O-Mn mismatch at the interface. The oxidation state of iridium is higher than Ir-IV, revealing the electron transfer to the substrate. On account of the crystal lattice distortion and electronic manipulations being favorable to the oxygen evolution reaction (OER), the as-synthesized composite exhibited excellent OER activity and stability. The improved catalytic nature was followed by enhancement in the electrochemical active surface area, mass specific activity, and intrinsic activity. Moreover, the Tafel slope of 42 mV dec(-1) reveals better reaction kinetics for IrO2/Mn-Co (2 : 1)-birnessite than many previously reported catalysts despite the low precious noble metal content in the as-synthesized composite. Conclusively, we have proven that the strain engineering holds vital importance in forming catalyst-support interaction and rational design of catalysts.