The electrochemical reduction of carbon dioxide (CO₂RR) is a promising approach for producing essential chemicals and feedstocks, storing clean energy, and reducing greenhouse gas emissions. Recent advances have improved CO₂RR performance, moving research from the lab to industrial applications. However, challenges such as mass transfer limitations, salt accumulation, and flooding persist. Recent studies have shown that conducting CO₂RR in acidic environments can overcome these issues, offering new opportunities. This review reassesses H-cells and flow cells, discussing their opportunities, challenges, strengths, and weaknesses. It also compiles recent advancements in CO₂RR under acidic conditions, highlighting performance metrics and strategies. Three key concerns in acidic CO₂RR are identified: balancing CO₂RR and hydrogen evolution reaction (HER), enhancing selectivity, and exploring industrial applications. Core factors influencing CO₂RR performance in acid include local pH, cation effects, and catalyst design. The review also discusses the potential of acidic conditions to achieve industrial-level current densities for CO₂RR. Despite the benefits of sustainable energy sources, practical applications of CO₂RR remain limited due to inherent flaws in existing systems. Traditional H-cells are suitable for small-scale studies but have limitations in mass transfer and HER robustness. Flow cells, while capable of achieving high current densities, face issues such as CO₂ crossover, flooding, and electrolyte contamination. Acidic conditions, using gas diffusion electrodes (GDEs) with acidic electrolytes, offer a viable solution by minimizing electrolyte contamination through reduced CO₂ dissolution. Recent studies have shown that acidic environments can achieve industrial-level current densities for CO₂RR. This review consolidates recent advancements in acidic CO₂RR, discussing challenges, opportunities, and strategies to enhance performance. Key strategies include local pH optimization, cation effects, and catalyst design.The electrochemical reduction of carbon dioxide (CO₂RR) is a promising approach for producing essential chemicals and feedstocks, storing clean energy, and reducing greenhouse gas emissions. Recent advances have improved CO₂RR performance, moving research from the lab to industrial applications. However, challenges such as mass transfer limitations, salt accumulation, and flooding persist. Recent studies have shown that conducting CO₂RR in acidic environments can overcome these issues, offering new opportunities. This review reassesses H-cells and flow cells, discussing their opportunities, challenges, strengths, and weaknesses. It also compiles recent advancements in CO₂RR under acidic conditions, highlighting performance metrics and strategies. Three key concerns in acidic CO₂RR are identified: balancing CO₂RR and hydrogen evolution reaction (HER), enhancing selectivity, and exploring industrial applications. Core factors influencing CO₂RR performance in acid include local pH, cation effects, and catalyst design. The review also discusses the potential of acidic conditions to achieve industrial-level current densities for CO₂RR. Despite the benefits of sustainable energy sources, practical applications of CO₂RR remain limited due to inherent flaws in existing systems. Traditional H-cells are suitable for small-scale studies but have limitations in mass transfer and HER robustness. Flow cells, while capable of achieving high current densities, face issues such as CO₂ crossover, flooding, and electrolyte contamination. Acidic conditions, using gas diffusion electrodes (GDEs) with acidic electrolytes, offer a viable solution by minimizing electrolyte contamination through reduced CO₂ dissolution. Recent studies have shown that acidic environments can achieve industrial-level current densities for CO₂RR. This review consolidates recent advancements in acidic CO₂RR, discussing challenges, opportunities, and strategies to enhance performance. Key strategies include local pH optimization, cation effects, and catalyst design.