Silver Leakage from Ag/AgCl Reference Electrodes as a Potential Cause of Interference in the Electrocatalytic Hydrogen Evolution Reaction

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data archive 6975 disk0/00/00/03/76 2016-12-05 09:51:32 2025-05-21 15:03:13 2016-12-05 09:51:32 data_collection show Roger Isolda Symes Mark 15851 0000-0001-8067-5240 glaresearchdata:2016-12-08-376 Silver Leakage from Ag/AgCl Reference Electrodes as a Potential Cause of Interference in the Electrocatalytic Hydrogen Evolution Reaction pub 30100000 The electrocatalytic hydrogen evolution reaction (HER) is of considerable interest for the production of H2 from sustainable sources. Herein, we show that under conditions commonly employed in identifying new electrocatalysts for this reaction (using Ag/AgCl reference electrodes in 1 M H2SO4), silver ions can leak from the reference electrode into solution and then deposit on the working electrode as Ag(0), giving current densities for the HER of over 5 mA cm−2 at ~500 mV overpotential. This is well within the activity range reported for many electrocatalysts of the HER, and calls into question the validity of any reports using Ag/AgCl reference electrodes which either fail to explicitly exclude silver as a cause of the electrocatalytic activity, or else cannot demonstrate significantly superior activity to this baseline. 2016-12-08 published University of Glasgow 10.5525/gla.researchdata.376 Spreadsheet University of Glasgow 62131 1 Upgrading the small scale equipment base for early career researchers in the engineering and physical sciences Miles Padgett Engineering & Physical Sciences Research Council (EPSRC) EP/K031732/1 S&E P&A - PHYSICS & ASTRONOMY FALSE English http://dx.doi.org/10.1021/acsami.6b13438 article 2026-12-08 R FALSE FALSE Silver Leakage from Ag/AgCl Reference Electrodes as a Potential Cause of Interference in the Electrocatalytic Hydrogen Evolution Reaction