Impact of Various Acids and Bases on the Voltammetric Response of Platinum Group Metal Oxides

<div>(a) Cyclic voltammograms of acids at 25°C. Impact of an extended potential window: solid lines: 0 to 1.5 V; dashed lines: <svg height="8.69875pt" id="M15" style="vertical-align:-0.3499298pt" version="1.1" viewbox="-0.0498162 -8.34882 23.2611 8.69875" width="23.2611pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M535 230V280H52V230H535Z" id="g117-33"></path></g><g transform="matrix(.013,0,0,-0.013,7.631,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 166 443 312C443 466 390 635 241 635ZM238 602C329 602 354 454 354 312C354 172 330 22 240 22C152 22 124 173 124 313S148 602 238 602Z" id="g113-49"></path></g><g transform="matrix(.013,0,0,-0.013,13.871,0)"><path d="M113 -12C146 -12 170 11 170 46C170 78 146 103 114 103S58 78 58 46C58 11 82 -12 113 -12Z" id="g113-47"></path></g><g transform="matrix(.013,0,0,-0.013,16.835,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z" id="g113-50"></path></g></svg> to 1.5 V RHE. Scan rate: 100 mV/s. (b) Full scale to show the oxygen reduction (RuO<sub>4</sub>) and the impact of chloride at 1.1 V RHE.</div>

International Journal of Electrochemistry

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Figure 3

Figure 3: Impact of Various Acids and Bases on the Voltammetric Response of Platinum Group Metal Oxides 