title: Combinatorial screening of photoelectrocatalytic system with high signal/noise ratio.
abstract: Solar energy is the most abundant nature resource and plays important roles in the sustainable developments of energy and environment. Scanning photoelectrochemical microscopy provides a high-throughput screening method by introducing the combinatorial technique to prepare the substrate with photoelectrochemical catalyst array. However, the signal/noise (S/N) ratio suffers from the background current of indium-tin oxide or fluorine-doped tin oxide itself, including a transient charge-discharge current of electric double layer and a steady-state photocatalytic current. Here we adopt a facile microfabrication method to isolate the substrate area other than the catalyst array from not only the electrolyte solution but also the light illumination. Consequently, the imaging quality has been promoted dramatically due to suppressed background current. This method provides a high S/N ratio screening method, which will be valuable for the high-throughput optimization of the photoelectrocatalytic system.
authors.affiliation: State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
authors.forename: Ding
authors.initials: D
authors.lastname: Yuan
authors.forename: Lina
authors.initials: L
authors.lastname: Xiao
authors.forename: Jingchun
authors.initials: J
authors.lastname: Jia
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Lianhuan
authors.initials: L
authors.lastname: Han
authors.forename: Pei
authors.initials: P
authors.lastname: Li
authors.forename: Bing-Wei
authors.initials: BW
authors.lastname: Mao
authors.forename: Dongping
authors.initials: D
authors.lastname: Zhan