Impact of the Gas Atmosphere present at the Triple Boundary Phase on the Measured Oxygen Evolution Reaction Electrocatalytic Activity of Ni2B/Ni3B electrocatalysts

This dataset contains all raw and processed data supporting the study investigating the electrocatalytic activity of Ni₂B and Ni₃B phases toward the oxygen evolution reaction (OER), and the influence of the surrounding atmosphere at the triple phase boundary on the measured current density. A Ni₇₀B₃₀ alloy ingot comprising both Ni₂B and Ni₃B phases was locally characterized using scanning electrochemical cell microscopy (SECCM). During measurements, the gas environment surrounding the nanodroplet at the SECCM probe tip was systematically controlled and varied, revealing significant effects of the ambient atmosphere on the recorded electrochemical activity. All raw SECCM and SEM data withits associated metadata, and post-processing scripts are included to enable full reproducibility and further analysis.本数据集收录了支撑下述研究的全部原始与经处理后的数据：该研究旨在探究Ni₂B与Ni₃B相对析氧反应（oxygen evolution reaction, OER）的电催化活性，以及三相界（triple phase boundary）处的周围气氛对实测电流密度的影响。本研究针对同时包含Ni₂B与Ni₃B相的Ni₇₀B₃₀合金锭，采用扫描电化学池显微镜（scanning electrochemical cell microscopy, SECCM）开展局域表征。测试过程中，系统调控并改变了SECCM探针尖端处纳米液滴周围的气体环境，结果表明环境气氛对记录所得的电化学活性存在显著影响。本数据集包含全部原始SECCM与扫描电子显微镜（scanning electron microscopy, SEM）数据及其配套元数据（metadata），同时提供可实现完整复现与后续拓展分析的后处理脚本（post-processing scripts）。