A Combinatorial Approach for Optimization of Oxygen Evolution Catalyst Loading on Mo‐doped BiVO4 Photoanodes. Issue 8 (22nd May 2019) - Gutkowski, Ramona
Abstract: The incident photon to current efficiency (IPCE) of a photoactive surface strongly depends on the loading and thickness of the active materials. We present a combinatorial approach based on an optical scanning droplet cell for simultaneous deposition and systematic characterization of co‐catalysts for the oxygen evolution reaction (OER) on Mo‐doped BiVO4 (Mo−BiVO4 ) photoanodes electrochemically pre‐deposited on transparent conductive FTO substrates. The loading and photoelectrochemical characterization of 10 different OER co‐catalysts deposited by three different deposition techniques on FTO‐supported Mo−BiVO4 were investigated aiming at determination of the suitable deposition parameters affording the highest enhancement of photoelectrochemical oxygen evolution for the different OER/Mo−BiVO4 films. A comparison of the photoelectrochemical performance of films of various OER co‐catalyst deposited on FTO‐supported Mo−BiVO4 by electrodeposition, photo‐assisted electrodeposition and photodeposition revealed the necessity of a material specific optimization with respect to co‐catalyst loading and deposition technique to achieve optimal IPCE for each co‐catalysts. Abstract :