Ag 3 PO 4 electrocatalyst for oxygen reduction reaction: enhancement from positive charge.

Authors :: Qin Y
Li F
Tu P
Ma Y
Chen W
Shi F
Xiang Q
Shan H
Zhang L
Tao P
Song C
Shang W
Deng T
Zhu H
Wu J
Source :: RSC advances [RSC Adv] 2018 Jan 31; Vol. 8 (10), pp. 5382-5387. Date of Electronic Publication: 2018 Jan 31 (Print Publication: 2018).
Publication Year :: 2018
Abstract: We have demonstrated Ag <subscript>3</subscript> PO <subscript>4</subscript> as an active non-Pt electrocatalyst with enhanced activity compared with Ag for oxygen reduction reaction (ORR). Density functional theory reveals that better ORR performance of Ag atoms on Ag <subscript>3</subscript> PO <subscript>4</subscript> surface than that on pure silver surface originates from more appropriate oxygen adsorption on positively charged Ag atoms. Further study of the surface geometry of Ag <subscript>3</subscript> PO <subscript>4</subscript> including tetrahedron, rhombic dodecahedron and cube indicates that the highest density of Ag and appropriate oxygen adsorption on {110} surface of rhombic dodecahedral Ag <subscript>3</subscript> PO <subscript>4</subscript> lead to the highest ORR activity, which is about 12 times that of Pt catalysts from a commercial perspective. It may be applicable for developing low-cost and highly active non-Pt catalytic materials from a broader range of material systems.<br />Competing Interests: There are no conflicts to declare.<br /> (This journal is © The Royal Society of Chemistry.)

Full Text Access

Tools