Accelerated Stability Testing Protocol for Photoelectrodes: A Case Study with BiVO4

We present an accelerated testing protocol for evaluating the long-term stability of photoelectrodes under operating conditions. Using BiVO4 as a case study, the method combines chronopotentiometry and chopped-light chronoamperometry with elevated temperature operation to simulate extended operational lifetimes at room temperature within practical timescales of days. The stepwise procedure captures both photoactivity and activity degradation through a reproducible sequence of diagnostic electrochemical measurements. This framework enables consistent benchmarking and supports the development of robust photoelectrode materials for the production of solar fuels and chemicals.