Constant-distance mode SECM as a tool to visualize local electrocatalytic activity of oxygen reduction catalysts

• Michaela Nebel,
• Thomas Erichsen and
• Wolfgang Schuhmann

Beilstein J. Nanotechnol. 2014, 5, 141–151, doi:10.3762/bjnano.5.14

• Michaela Nebel Thomas Erichsen Wolfgang Schuhmann Lehrstuhl für Analytische Chemie; Ruhr-Universität Bochum, D-44780 Bochum Sensolytics GmbH, Universitätsstr 142, D-44799 Bochum 10.3762/bjnano.5.14 Abstract Multidimensional shearforce-based constant-distance mode scanning electrochemical

• high-resolution SECM experiments to powder-based catalyst preparations. Keywords: electrocatalysis; oxygen reduction; recessed microelectrodes; redox-competition SECM; SECM; scanning electrochemical microscopy; shearforce-based constant-distance mode; Introduction In scanning electrochemical

• intermitted contact mode (IC-SECM) [11], the shearforce-based constant-distance mode [12][13][14] has been widely used and demonstrated its feasibility for high-resolution SECM. Furthermore, decoupling of the working distance of the electrochemical detection from the typically very short working distances