Controlled Synthesis of Silver Micro/Nano Leaves for Oxygen Reduction and CO₂ Reduction

Meng Wang; Rongji Liu; Shuangshuang Zhang; Bin Li; Ke Zhang; Guangjin Zhang

doi:10.1166/jnn.2018.15369

Controlled Synthesis of Silver Micro/Nano Leaves for Oxygen Reduction and CO₂ Reduction

J Nanosci Nanotechnol. 2018 Aug 1;18(8):5763-5769. doi: 10.1166/jnn.2018.15369.

Authors

Meng Wang¹, Rongji Liu¹, Shuangshuang Zhang¹, Bin Li², Ke Zhang², Guangjin Zhang¹

Affiliations

¹ Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, China.
² Zhengzhou Tobacco Research Institute of CNTC, 450001, Zhengzhou, China.

PMID: 29458637
DOI: 10.1166/jnn.2018.15369

Abstract

In this study, three different Ag micro/nano leaves were successfully synthesized through a galvanic displacement reaction by adjusting the concentration of Ag+. The catalytic activities of the prepared Ag micro/nano leaves toward ORR showed strong dependence on their morphology. An optimal concentration of Ag+ can result in a well-defined Ag micro/nano leaves with both crystallization and surface area, which showed the best activity towards ORR in alkaline media. In addition, the prepared Ag micro/nano leaves also showed high activity towards CO2 reduction, which required a potential of -0.8 V versus RHE to selectively convert CO2 to CO with the faradaic efficiency at about 20%. Compared with the Ag plate at the same overpotential, the FE has increased by 5-fold.