Hierarchical defective palladium-silver alloy nanosheets for ethanol electrooxidation

Xiaomin Meng; Yirui Ouyang; Huijie Wu; Haowei Huang; Fengqian Wang; Shuo Wang; Mengchao Jiang; Lian Ying Zhang

doi:10.1016/j.jcis.2020.10.084

Hierarchical defective palladium-silver alloy nanosheets for ethanol electrooxidation

J Colloid Interface Sci. 2021 Mar 15:586:200-207. doi: 10.1016/j.jcis.2020.10.084. Epub 2020 Oct 30.

Authors

Xiaomin Meng¹, Yirui Ouyang¹, Huijie Wu², Haowei Huang¹, Fengqian Wang¹, Shuo Wang¹, Mengchao Jiang¹, Lian Ying Zhang³

Affiliations

¹ Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China.
² Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 400715, PR China.
³ Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China; Chongqing Key Laboratory for Advanced Materials & Technologies of Clean Energies, Institute for Clean Energy and Advanced Materials, Southwest University, Chongqing 400715, PR China. Electronic address: lyzhang@swu.edu.cn.

PMID: 33208247
DOI: 10.1016/j.jcis.2020.10.084

Abstract

Tuning the chemical composition and surface structure of electrodes is demonstrated as a feasible and effective strategy to tailor advanced catalysts for energy electrocatalysis. In this work, hierarchical palladium-silver alloy nanosheets (PdAg NS) with the thickness ~7 atoms and rich atomic defects are successfully prepared, using the carbon monoxide (CO) confinement approach. The optimized Pd₇Ag₃ NS/C exhibits 8.8 times higher catalytic peak current density and much better stability toward ethanol electrooxidation than Pd NS/C catalyst. The catalytic enhancement mechanism could be attributed to the synergetic effects among optimized electronic structure of Pd, novel architecture, and rich atomic defects.

Keywords: Electrocatalysts; Ethanol oxidation reaction; Fuel cells; Nanosheets; PdAg alloy.