Abstract Generating H2O2 through the use of photoelectrochemical cells (PECs) is attractive for integrating renewable energies into the production of this environmentally-friendly chemical oxidant. Here, we fabricate a PEC for producing H2O2, establish an effective analytical platform for studying this device, and determine optimal catalysts to use. Specifically, we use scanning electrochemical microscopy (SECM) as an analytical technique to measure H2O2 production in-situ from a PEC and study a variety of electrocatalysts and photocatalysts. The effects of materials properties such as photoanode band edge and H2O2 electrocatalyst selectivity are probed here to determine ideal catalytic properties for an optimal H2O2 PEC. This work successfully incorporated SECM as an H2O2 detection method into a 2-electrode PEC, and it also demonstrates the potential to streamline the discovery of new materials for implementation into a high efficiency H2O2 PEC.

中文翻译：

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通过实时原位探针评估催化剂选择和半导体带边对光电化学产生 H2O2 的影响

摘要 通过使用光电化学电池 (PEC) 产生 H2O2 对将可再生能源整合到这种环保化学氧化剂的生产中具有吸引力。在这里，我们制造了一个用于生产 H2O2 的 PEC，为研究该设备建立了一个有效的分析平台，并确定了要使用的最佳催化剂。具体来说，我们使用扫描电化学显微镜 (SECM) 作为一种分析技术来测量 PEC 原位产生的 H2O2，并研究各种电催化剂和光催化剂。这里探讨了材料特性的影响，如光阳极带边和 H2O2 电催化剂选择性，以确定最佳 H2O2 PEC 的理想催化特性。这项工作成功地将作为 H2O2 检测方法的 SECM 纳入了 2 电极 PEC，