The authors have conducted a systematic investigation of CO2RR activity using MEA cells under various temperature conditions. This research is highly likely to provide valuable information for the future development of this technology. I would generally recommend publication once my comments are addressed.

My main concern is the insufficient consideration of stability issues. First, the authors should systematically measure stability while varying the temperature. For example, as depicted in Figure S10, there should be a deeper discussion on stability issues at high current densities and high temperatures. I understand that stable operation under these conditions is challenging. However, data and discussions on instability under these conditions are more valuable to readers than those on moderately stable conditions.
Additionally, the authors need to explain the reasons for the eventual cessation of electrolysis at high temperatures. Is it due to short circuits caused by membrane degradation? Salt precipitation blocking the CO2 flow? Or a significant increase in cell voltage? This information is also crucial for future research.