Boosting oxygen electrode efficiency using engineered CuO/Cu_(2)O/C nanostructure  

作　　者：Kumar Kashyap Hazarika Shaheen Parveez Bhuyan Rashmi Chetry Pankaj Bharali 

机构地区：[1]Department of Chemical Sciences,Tezpur University,Napaam,Assam,India [2]Department of Chemistry,University of Science&Technology Meghalaya,Ri-Bhoi,Meghalaya,India

出　　处：《cMat》2024年第3期26-39,共14页铜新材（英文）

摘　　要：The key ongoing challenge is to design and develop effective and inexpensive ox-ygenreductionreaction(ORR)catalysts toreplacePt-basedonesforcommercial use in fuel cells.Owing to its abundance and tunable electronic properties,in the cur-rent work,the synthesis of highly dispersed mixed valent copper oxide electro-catalyst is reported.The EC exhibits a high mass activity of 9.8 mA mg^(-1) and a high current density of 5.3 mA cm^(-2) in contrast to the benchmark(20 wt%)Pt/C catalyst in a 0.1-M KOH solution for ORR.The significantly high electrochemical activity at the cathode is believed to be due to the presence of the Cu(II)/Cu(I)redox pair.Furthermore,the catalyst has been shown to be highly stable,maintaining a high current retention of 78%for up to 24 h.Furthermore,the engineered material is also active for the oxygen evolution reaction,making it a viable replacement for con-ventional Pt/C in alkaline fuel cells.

关 键 词：Cu-oxide ELECTROCATALYST fuel cells NANOSTRUCTURE oxygen electrode reaction 

分 类 号：O64[理学—物理化学]