Effect of silver electrode wetting state on oxygen reduction electrochemistry

Austin McKee; Avik Samanta; Alan Rassoolkhani; Jonathan Koonce; Wuji Huang; Jacob Fields; Scott K. Shaw; Joseph Gomes; Hongtao Ding; Syed Mubeen

doi:10.1039/D1CC01438B

Effect of silver electrode wetting state on oxygen reduction electrochemistry†

Austin McKee,

‡^a Avik Samanta,

‡^b Alan Rassoolkhani,^a Jonathan Koonce,^a Wuji Huang,^b Jacob Fields,^a Scott K. Shaw,

^c Joseph Gomes,

^a Hongtao Ding

*^b and Syed Mubeen

*^a

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* Corresponding authors

^a Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, IA 52242, USA
E-mail: syed-mubeen@uiowa.edu

^b Department of Mechanical Engineering, University of Iowa, Iowa City, Iowa 52242, USA

^c Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA

Abstract

Surface wettability plays an important role in heterogeneous electrocatalysis. Here we report a facile laser ablation strategy to directly modify the wettability of the silver catalyst surface and investigate its effect on oxygen reduction reaction (ORR). A broad range tuning of 2e⁻/4e⁻ ORR pathways was achieved, with hydrophilic silver surfaces (contact angle (θ_w) 31.1° ± 0.6°) showing high activity and selectivity towards 4e⁻ reduction of oxygen to water.

Chemical Communications

Effect of silver electrode wetting state on oxygen reduction electrochemistry†

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Effect of silver electrode wetting state on oxygen reduction electrochemistry

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