N,P Co-coordinated Fe Species Embedded in Carbon Hollow Spheres for Oxygen Electrocatalysis
學年 107
學期 2
出版（發表）日期 2019-05-22
作品名稱 N,P Co-coordinated Fe Species Embedded in Carbon Hollow Spheres for Oxygen Electrocatalysis
作品名稱（其他語言）
著者 Xiaofeng Zhu, Xin Tan, Kuang-Hsu Wu, Chao-Lung Chiang, Yu-Chang Lin, Yan-Gu Lin, Da-Wei Wang, Sean Smith, Xunyu Lu, and Rose Amal
單位
出版者
著錄名稱、卷期、頁數 Journal of Materials Chemistry A, 7, 14732-14742
摘要 The increasing interest in fuel cell technology and metal–air batteries has led to the need for stable and effective catalyst materials to replace noble metal (such as Pt) based benchmarks for the oxygen reduction reaction (ORR). In this study, carbon hollow spheres with highly dispersed nitrogen and phosphorus co-coordinated iron atoms (FeNPC) on their surface have been successfully fabricated, exhibiting exceptional ORR activity in both alkaline and acidic solutions. Specifically, the obtained FeNPC catalyst is capable of catalyzing the ORR with an onset potential of 1.03 V and a half-wave potential of 0.88 V (both vs. the reversible hydrogen electrode) in alkaline solution, outperforming the commercial Pt/C catalyst under identical conditions. Experimental results and theoretical simulations reveal that the quasi-octahedral O2-FeNxPy species are the active sites of the FeNPC composite. These species modify the electronic configuration of Fe centers and weaken the adsorption of the OH* intermediate, thereby promoting the ORR process. Additionally, the FeNPC catalyst also displays a catalytic activity towards the anodic oxygen evolution reaction (OER), making it an active air electrode catalyst in rechargeable Zn–air batteries with a high peak power density of 233.2 mW cm−2 and an excellent cycling stability at 3 mA cm−2 for over 15 h.
關鍵字
語言 en
ISSN
期刊性質 國外
收錄於 SCI SSCI
產學合作
通訊作者 Xunyu Lu & Rose Amal
審稿制度 1
國別 GBR
公開徵稿
出版型式 ,電子版
SDGS 夥伴關係,可負擔的潔淨能源,產業創新與基礎設施